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Overview
Comment:Aborted merge.
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | obsolete
Files: files | file ages | folders
SHA1: c8ade949d4a2eb3bba4702a4a0e17b405e9b6ace
User & Date: numist 2014-08-15 22:37:57
Original Comment: Internal changes not (yet) present in the fossil apple-osx branch after merging.
Context
2014-08-15
22:37
Aborted merge. Closed-Leaf check-in: c8ade949 user: numist tags: obsolete
2014-06-05
12:53
Merge in the 3.8.5 release changes and the FTS integrity-check fix. check-in: 2dbdfa51 user: drh tags: apple-osx
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to Makefile.in.

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         fts3_unicode.lo fts3_unicode2.lo fts3_write.lo \
         func.lo global.lo hash.lo \
         icu.lo insert.lo journal.lo legacy.lo loadext.lo \
         main.lo malloc.lo mem0.lo mem1.lo mem2.lo mem3.lo mem5.lo \
         memjournal.lo \
         mutex.lo mutex_noop.lo mutex_unix.lo mutex_w32.lo \
         notify.lo opcodes.lo os.lo os_unix.lo os_win.lo \
         pager.lo parse.lo pcache.lo pcache1.lo pragma.lo prepare.lo printf.lo \
         random.lo resolve.lo rowset.lo rtree.lo select.lo status.lo \
         table.lo tokenize.lo trigger.lo \
         update.lo util.lo vacuum.lo \
         vdbe.lo vdbeapi.lo vdbeaux.lo vdbeblob.lo vdbemem.lo vdbesort.lo \
         vdbetrace.lo wal.lo walker.lo where.lo utf.lo vtab.lo

# Object files for the amalgamation.
................................................................................
  $(TOP)/src/os_win.h \
  $(TOP)/src/pager.c \
  $(TOP)/src/pager.h \
  $(TOP)/src/parse.y \
  $(TOP)/src/pcache.c \
  $(TOP)/src/pcache.h \
  $(TOP)/src/pcache1.c \

  $(TOP)/src/pragma.c \
  $(TOP)/src/prepare.c \
  $(TOP)/src/printf.c \
  $(TOP)/src/random.c \
  $(TOP)/src/resolve.c \
  $(TOP)/src/rowset.c \
  $(TOP)/src/select.c \
................................................................................
  $(TOP)/src/shell.c \
  $(TOP)/src/sqlite.h.in \
  $(TOP)/src/sqlite3ext.h \
  $(TOP)/src/sqliteInt.h \
  $(TOP)/src/sqliteLimit.h \
  $(TOP)/src/table.c \
  $(TOP)/src/tclsqlite.c \

  $(TOP)/src/tokenize.c \
  $(TOP)/src/trigger.c \
  $(TOP)/src/utf.c \
  $(TOP)/src/update.c \
  $(TOP)/src/util.c \
  $(TOP)/src/vacuum.c \
  $(TOP)/src/vdbe.c \
................................................................................
  $(TOP)/ext/icu/icu.c
SRC += \
  $(TOP)/ext/rtree/rtree.h \
  $(TOP)/ext/rtree/rtree.c
SRC += \
  $(TOP)/ext/sqlrr/sqlrr.h \
  $(TOP)/ext/sqlrr/sqlrr.c






# Generated source code files
#
SRC += \
  keywordhash.h \
  opcodes.c \
................................................................................
  $(TOP)/src/test_config.c \
  $(TOP)/src/test_demovfs.c \
  $(TOP)/src/test_devsym.c \
  $(TOP)/src/test_fs.c \
  $(TOP)/src/test_func.c \
  $(TOP)/src/test_hexio.c \
  $(TOP)/src/test_init.c \
  $(TOP)/src/test_intarray.c \
  $(TOP)/src/test_journal.c \
  $(TOP)/src/test_malloc.c \
  $(TOP)/src/test_multiplex.c \
  $(TOP)/src/test_mutex.c \
  $(TOP)/src/test_onefile.c \
  $(TOP)/src/test_osinst.c \
  $(TOP)/src/test_pcache.c \
................................................................................
   $(TOP)/src/pager.h \
   $(TOP)/src/pcache.h \
   parse.h  \
   sqlite3.h  \
   $(TOP)/src/sqlite3ext.h \
   $(TOP)/src/sqliteInt.h  \
   $(TOP)/src/sqliteLimit.h \

   $(TOP)/src/vdbe.h \
   $(TOP)/src/vdbeInt.h \
   $(TOP)/src/whereInt.h \
   config.h

# Header files used by extensions
#
................................................................................
	$(LTCOMPILE) $(TEMP_STORE) -c $(TOP)/src/pager.c

pcache.lo:	$(TOP)/src/pcache.c $(HDR) $(TOP)/src/pcache.h
	$(LTCOMPILE) $(TEMP_STORE) -c $(TOP)/src/pcache.c

pcache1.lo:	$(TOP)/src/pcache1.c $(HDR) $(TOP)/src/pcache.h
	$(LTCOMPILE) $(TEMP_STORE) -c $(TOP)/src/pcache1.c




os.lo:	$(TOP)/src/os.c $(HDR)
	$(LTCOMPILE) $(TEMP_STORE) -c $(TOP)/src/os.c

os_unix.lo:	$(TOP)/src/os_unix.c $(HDR)
	$(LTCOMPILE) $(TEMP_STORE) -c $(TOP)/src/os_unix.c








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         fts3_unicode.lo fts3_unicode2.lo fts3_write.lo \
         func.lo global.lo hash.lo \
         icu.lo insert.lo journal.lo legacy.lo loadext.lo \
         main.lo malloc.lo mem0.lo mem1.lo mem2.lo mem3.lo mem5.lo \
         memjournal.lo \
         mutex.lo mutex_noop.lo mutex_unix.lo mutex_w32.lo \
         notify.lo opcodes.lo os.lo os_unix.lo os_win.lo \
         pager.lo parse.lo pcache.lo pcache1.lo pcache_purgeable.lo pragma.lo prepare.lo printf.lo \
         random.lo resolve.lo rowset.lo rtree.lo select.lo status.lo \
         table.lo tokenize.lo trigger.lo \
         update.lo util.lo vacuum.lo \
         vdbe.lo vdbeapi.lo vdbeaux.lo vdbeblob.lo vdbemem.lo vdbesort.lo \
         vdbetrace.lo wal.lo walker.lo where.lo utf.lo vtab.lo

# Object files for the amalgamation.
................................................................................
  $(TOP)/src/os_win.h \
  $(TOP)/src/pager.c \
  $(TOP)/src/pager.h \
  $(TOP)/src/parse.y \
  $(TOP)/src/pcache.c \
  $(TOP)/src/pcache.h \
  $(TOP)/src/pcache1.c \
  $(TOP)/src/pcache_purgeable.c \
  $(TOP)/src/pragma.c \
  $(TOP)/src/prepare.c \
  $(TOP)/src/printf.c \
  $(TOP)/src/random.c \
  $(TOP)/src/resolve.c \
  $(TOP)/src/rowset.c \
  $(TOP)/src/select.c \
................................................................................
  $(TOP)/src/shell.c \
  $(TOP)/src/sqlite.h.in \
  $(TOP)/src/sqlite3ext.h \
  $(TOP)/src/sqliteInt.h \
  $(TOP)/src/sqliteLimit.h \
  $(TOP)/src/table.c \
  $(TOP)/src/tclsqlite.c \
  $(TOP)/src/test_intarray.h \
  $(TOP)/src/tokenize.c \
  $(TOP)/src/trigger.c \
  $(TOP)/src/utf.c \
  $(TOP)/src/update.c \
  $(TOP)/src/util.c \
  $(TOP)/src/vacuum.c \
  $(TOP)/src/vdbe.c \
................................................................................
  $(TOP)/ext/icu/icu.c
SRC += \
  $(TOP)/ext/rtree/rtree.h \
  $(TOP)/ext/rtree/rtree.c
SRC += \
  $(TOP)/ext/sqlrr/sqlrr.h \
  $(TOP)/ext/sqlrr/sqlrr.c
SRC += \
  $(TOP)/src/test_intarray.c
SRC += \
  $(TOP)/src/sqlite3_private.h


# Generated source code files
#
SRC += \
  keywordhash.h \
  opcodes.c \
................................................................................
  $(TOP)/src/test_config.c \
  $(TOP)/src/test_demovfs.c \
  $(TOP)/src/test_devsym.c \
  $(TOP)/src/test_fs.c \
  $(TOP)/src/test_func.c \
  $(TOP)/src/test_hexio.c \
  $(TOP)/src/test_init.c \

  $(TOP)/src/test_journal.c \
  $(TOP)/src/test_malloc.c \
  $(TOP)/src/test_multiplex.c \
  $(TOP)/src/test_mutex.c \
  $(TOP)/src/test_onefile.c \
  $(TOP)/src/test_osinst.c \
  $(TOP)/src/test_pcache.c \
................................................................................
   $(TOP)/src/pager.h \
   $(TOP)/src/pcache.h \
   parse.h  \
   sqlite3.h  \
   $(TOP)/src/sqlite3ext.h \
   $(TOP)/src/sqliteInt.h  \
   $(TOP)/src/sqliteLimit.h \
   $(TOP)/src/test_intarray.h \
   $(TOP)/src/vdbe.h \
   $(TOP)/src/vdbeInt.h \
   $(TOP)/src/whereInt.h \
   config.h

# Header files used by extensions
#
................................................................................
	$(LTCOMPILE) $(TEMP_STORE) -c $(TOP)/src/pager.c

pcache.lo:	$(TOP)/src/pcache.c $(HDR) $(TOP)/src/pcache.h
	$(LTCOMPILE) $(TEMP_STORE) -c $(TOP)/src/pcache.c

pcache1.lo:	$(TOP)/src/pcache1.c $(HDR) $(TOP)/src/pcache.h
	$(LTCOMPILE) $(TEMP_STORE) -c $(TOP)/src/pcache1.c

pcache_purgeable.lo:	$(TOP)/src/pcache_purgeable.c $(HDR) $(TOP)/src/pcache.h
	$(LTCOMPILE) $(TEMP_STORE) -c $(TOP)/src/pcache_purgeable.c

os.lo:	$(TOP)/src/os.c $(HDR)
	$(LTCOMPILE) $(TEMP_STORE) -c $(TOP)/src/os.c

os_unix.lo:	$(TOP)/src/os_unix.c $(HDR)
	$(LTCOMPILE) $(TEMP_STORE) -c $(TOP)/src/os_unix.c

Changes to config.h.in.

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/* Define to 1 if you have the `localtime_r' function. */
#undef HAVE_LOCALTIME_R

/* Define to 1 if you have the `localtime_s' function. */
#undef HAVE_LOCALTIME_S

/* Define to 1 if you have the <malloc.h> header file. */
#undef HAVE_MALLOC_H

/* Define to 1 if you have the `malloc_usable_size' function. */
#undef HAVE_MALLOC_USABLE_SIZE

/* Define to 1 if you have the <memory.h> header file. */
#undef HAVE_MEMORY_H

/* Define to 1 if you have the <stdint.h> header file. */
#undef HAVE_STDINT_H

................................................................................
/* Define to 1 if you have the <unistd.h> header file. */
#undef HAVE_UNISTD_H

/* Define to 1 if you have the `usleep' function. */
#undef HAVE_USLEEP

/* Define to 1 if you have the utime() library function. */
#undef HAVE_UTIME

/* Define to the sub-directory in which libtool stores uninstalled libraries.
   */
#undef LT_OBJDIR

/* Define to the address where bug reports for this package should be sent. */
#undef PACKAGE_BUGREPORT







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/* Define to 1 if you have the `localtime_r' function. */
#undef HAVE_LOCALTIME_R

/* Define to 1 if you have the `localtime_s' function. */
#undef HAVE_LOCALTIME_S

/* Define to 1 if you have the <malloc.h> header file. */
/* #undef HAVE_MALLOC_H */

/* Define to 1 if you have the `malloc_usable_size' function. */
/* #undef HAVE_MALLOC_USABLE_SIZE */

/* Define to 1 if you have the <memory.h> header file. */
#undef HAVE_MEMORY_H

/* Define to 1 if you have the <stdint.h> header file. */
#undef HAVE_STDINT_H

................................................................................
/* Define to 1 if you have the <unistd.h> header file. */
#undef HAVE_UNISTD_H

/* Define to 1 if you have the `usleep' function. */
#undef HAVE_USLEEP

/* Define to 1 if you have the utime() library function. */
/* #undef HAVE_UTIME */

/* Define to the sub-directory in which libtool stores uninstalled libraries.
   */
#undef LT_OBJDIR

/* Define to the address where bug reports for this package should be sent. */
#undef PACKAGE_BUGREPORT

Changes to src/btree.c.

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**
*************************************************************************
** This file implements a external (disk-based) database using BTrees.
** See the header comment on "btreeInt.h" for additional information.
** Including a description of file format and an overview of operation.
*/
#include "btreeInt.h"


/*
** The header string that appears at the beginning of every
** SQLite database.
*/
static const char zMagicHeader[] = SQLITE_FILE_HEADER;

















/*
** Set this global variable to 1 to enable tracing using the TRACE
** macro.
*/
#if 0
int sqlite3BtreeTrace=1;  /* True to enable tracing */
................................................................................
    /* Call lockBtree() until either pBt->pPage1 is populated or
    ** lockBtree() returns something other than SQLITE_OK. lockBtree()
    ** may return SQLITE_OK but leave pBt->pPage1 set to 0 if after
    ** reading page 1 it discovers that the page-size of the database 
    ** file is not pBt->pageSize. In this case lockBtree() will update
    ** pBt->pageSize to the page-size of the file on disk.
    */







    while( pBt->pPage1==0 && SQLITE_OK==(rc = lockBtree(pBt)) );








    if( rc==SQLITE_OK && wrflag ){
      if( (pBt->btsFlags & BTS_READ_ONLY)!=0 ){
        rc = SQLITE_READONLY;
      }else{
        rc = sqlite3PagerBegin(pBt->pPager,wrflag>1,sqlite3TempInMemory(p->db));
        if( rc==SQLITE_OK ){
          rc = newDatabase(pBt);







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**
*************************************************************************
** This file implements a external (disk-based) database using BTrees.
** See the header comment on "btreeInt.h" for additional information.
** Including a description of file format and an overview of operation.
*/
#include "btreeInt.h"
#include <AvailabilityMacros.h>

/*
** The header string that appears at the beginning of every
** SQLite database.
*/
static const char zMagicHeader[] = SQLITE_FILE_HEADER;

#if defined(SQLITE_ENABLE_FLOCKTIMEOUT)&&(SQLITE_ENABLE_FLOCKTIMEOUT>0)
# if (defined(__APPLE__) && (!defined(TARGET_IPHONE_SIMULATOR)||(TARGET_IPHONE_SIMULATOR==0)) && ((TARGET_OS_EMBEDDED>0)||(MAC_OS_X_VERSION_10_9>0)))
#  define SQLITE_USE_FLOCKTIMEOUT 1
# endif
#endif /* SQLITE_ENABLE_FLOCKTIMEOUT */

/*
 ** Operator used with sqlite3_file_control to set the timeout for the next call
 ** to lock the database file via fcntl with F_SETLKWTIMEOUT.  The timeout should
 ** be passed as a pointer to a long representing the timeout in milliseconds
 */
#ifndef SQLITE_FCNTL_SET_NEXTFLOCKTIMEOUT
#define SQLITE_FCNTL_SET_NEXTFLOCKTIMEOUT      104
#define SQLITE_FCNTL_GET_NEXTFLOCKTIMEOUT      105
#endif

/*
** Set this global variable to 1 to enable tracing using the TRACE
** macro.
*/
#if 0
int sqlite3BtreeTrace=1;  /* True to enable tracing */
................................................................................
    /* Call lockBtree() until either pBt->pPage1 is populated or
    ** lockBtree() returns something other than SQLITE_OK. lockBtree()
    ** may return SQLITE_OK but leave pBt->pPage1 set to 0 if after
    ** reading page 1 it discovers that the page-size of the database 
    ** file is not pBt->pageSize. In this case lockBtree() will update
    ** pBt->pageSize to the page-size of the file on disk.
    */
    
#ifdef SQLITE_USE_FLOCKTIMEOUT
    int existingNextTimeout = 0;
    if (wrflag) {
      sqlite3_file_control(p->db, NULL, SQLITE_FCNTL_GET_NEXTFLOCKTIMEOUT, &existingNextTimeout);
    }
    
    while( pBt->pPage1==0 && SQLITE_OK==(rc = lockBtree(pBt)) );

    if (wrflag) {
      sqlite3_file_control(p->db, NULL, SQLITE_FCNTL_SET_NEXTFLOCKTIMEOUT, &existingNextTimeout);
    }
#else
    while( pBt->pPage1==0 && SQLITE_OK==(rc = lockBtree(pBt)) );
#endif
    
    if( rc==SQLITE_OK && wrflag ){
      if( (pBt->btsFlags & BTS_READ_ONLY)!=0 ){
        rc = SQLITE_READONLY;
      }else{
        rc = sqlite3PagerBegin(pBt->pPager,wrflag>1,sqlite3TempInMemory(p->db));
        if( rc==SQLITE_OK ){
          rc = newDatabase(pBt);

Changes to src/ctime.c.

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  "CASE_SENSITIVE_LIKE",
#endif
#ifdef SQLITE_CHECK_PAGES
  "CHECK_PAGES",
#endif
#ifdef SQLITE_COVERAGE_TEST
  "COVERAGE_TEST",



#endif
#ifdef SQLITE_DEBUG
  "DEBUG",
#endif
#ifdef SQLITE_DEFAULT_LOCKING_MODE
  "DEFAULT_LOCKING_MODE=" CTIMEOPT_VAL(SQLITE_DEFAULT_LOCKING_MODE),
#endif







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  "CASE_SENSITIVE_LIKE",
#endif
#ifdef SQLITE_CHECK_PAGES
  "CHECK_PAGES",
#endif
#ifdef SQLITE_COVERAGE_TEST
  "COVERAGE_TEST",
#endif
#ifdef SQLITE_CURDIR
  "CURDIR",
#endif
#ifdef SQLITE_DEBUG
  "DEBUG",
#endif
#ifdef SQLITE_DEFAULT_LOCKING_MODE
  "DEFAULT_LOCKING_MODE=" CTIMEOPT_VAL(SQLITE_DEFAULT_LOCKING_MODE),
#endif

Changes to src/loadext.c.

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    }else{
      xInit = (int(*)(sqlite3*,char**,const sqlite3_api_routines*))
              wsdAutoext.aExt[i];
    }
    sqlite3_mutex_leave(mutex);
    zErrmsg = 0;
    if( xInit && (rc = xInit(db, &zErrmsg, &sqlite3Apis))!=0 ){
      sqlite3Error(db, rc,
            "automatic extension loading failed: %s", zErrmsg);
      go = 0;
    }
    sqlite3_free(zErrmsg);
  }
}







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    }else{
      xInit = (int(*)(sqlite3*,char**,const sqlite3_api_routines*))
              wsdAutoext.aExt[i];
    }
    sqlite3_mutex_leave(mutex);
    zErrmsg = 0;
    if( xInit && (rc = xInit(db, &zErrmsg, &sqlite3Apis))!=0 ){

//      sqlite3Error(db, rc, "automatic extension loading failed: %s", zErrmsg);
//      go = 0;
    }
    sqlite3_free(zErrmsg);
  }
}

Changes to src/main.c.

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3607
*************************************************************************
** Main file for the SQLite library.  The routines in this file
** implement the programmer interface to the library.  Routines in
** other files are for internal use by SQLite and should not be
** accessed by users of the library.
*/
#include "sqliteInt.h"


#ifdef SQLITE_ENABLE_SQLRR
# include "sqlrr.h"
#endif 
#ifdef SQLITE_ENABLE_FTS3
# include "fts3.h"
#endif
................................................................................
#ifdef SQLITE_ENABLE_RTREE
# include "rtree.h"
#endif
#ifdef SQLITE_ENABLE_ICU
# include "sqliteicu.h"
#endif

































#ifndef SQLITE_AMALGAMATION
/* IMPLEMENTATION-OF: R-46656-45156 The sqlite3_version[] string constant
** contains the text of SQLITE_VERSION macro. 
*/
const char sqlite3_version[] = SQLITE_VERSION;
#endif

................................................................................
      sqlite3PCacheBufferSetup( sqlite3GlobalConfig.pPage, 
          sqlite3GlobalConfig.szPage, sqlite3GlobalConfig.nPage);
      sqlite3GlobalConfig.isInit = 1;
#ifdef SQLITE_EXTRA_INIT
      bRunExtraInit = 1;
#endif
    }








































    sqlite3GlobalConfig.inProgress = 0;
  }
  sqlite3_mutex_leave(sqlite3GlobalConfig.pInitMutex);

  /* Go back under the static mutex and clean up the recursive
  ** mutex to prevent a resource leak.
  */
................................................................................
** argument.
*/
static int sqliteDefaultBusyCallback(
 void *ptr,               /* Database connection */
 int count                /* Number of times table has been busy */
){
#if SQLITE_OS_WIN || (defined(HAVE_USLEEP) && HAVE_USLEEP)






  static const u8 delays[] =
     { 1, 2, 5, 10, 15, 20, 25, 25,  25,  50,  50, 100 };
  static const u8 totals[] =
     { 0, 1, 3,  8, 18, 33, 53, 78, 103, 128, 178, 228 };


# define NDELAY ArraySize(delays)
  sqlite3 *db = (sqlite3 *)ptr;
  int timeout = db->busyTimeout;
  int delay, prior;

  assert( count>=0 );
  if( count < NDELAY ){
................................................................................
    prior = totals[count];
  }else{
    delay = delays[NDELAY-1];
    prior = totals[NDELAY-1] + delay*(count-(NDELAY-1));
  }
  if( prior + delay > timeout ){
    delay = timeout - prior;
    if( delay<=0 ) return 0;





  }




  sqlite3OsSleep(db->pVfs, delay*1000);

  return 1;
#else
  sqlite3 *db = (sqlite3 *)ptr;
  int timeout = ((sqlite3 *)ptr)->busyTimeout;
  if( (count+1)*1000 > timeout ){
    return 0;
  }
................................................................................
  if( NULL!=autolog_client ){
    asl_close(autolog_client);
    autolog_client = NULL;
  }
}
static void _open_asl_log() {
  if( NULL==autolog_client ){
    autolog_client = asl_open("SQLite", NULL, 0);
    atexit(_close_asl_log);
  }
}

void _sqlite_auto_profile_syslog(void *aux, const char *sql, u64 ns);
void _sqlite_auto_trace_syslog(void *aux, const char *sql);
void _sqlite_auto_profile_syslog(void *aux, const char *sql, u64 ns) {
#pragma unused(aux)
	asl_log(autolog_client, NULL, ASL_LEVEL_NOTICE, "Query: %s\n Execution Time: %llu ms\n", sql, ns / 1000000);
}
void _sqlite_auto_trace_syslog(void *aux, const char *sql) {
	asl_log(autolog_client, NULL, ASL_LEVEL_NOTICE, "TraceSQL(%p): %s\n", aux, sql);
}
#endif

/*
** This function is used to parse both URIs and non-URI filenames passed by the
** user to API functions sqlite3_open() or sqlite3_open_v2(), and for database
** URIs specified as part of ATTACH statements.
................................................................................
  const char *zVfs       /* Name of the VFS to use */
){
  sqlite3 *db;                    /* Store allocated handle here */
  int rc;                         /* Return code */
  int isThreadsafe;               /* True for threadsafe connections */
  char *zOpen = 0;                /* Filename argument to pass to BtreeOpen() */
  char *zErrMsg = 0;              /* Error message from sqlite3ParseUri() */




  *ppDb = 0;
#ifndef SQLITE_OMIT_AUTOINIT
  rc = sqlite3_initialize();
  if( rc ) return rc;
#endif

................................................................................
               SQLITE_OPEN_TEMP_JOURNAL | 
               SQLITE_OPEN_SUBJOURNAL | 
               SQLITE_OPEN_MASTER_JOURNAL |
               SQLITE_OPEN_NOMUTEX |
               SQLITE_OPEN_FULLMUTEX |
               SQLITE_OPEN_WAL
             );




  /* Allocate the sqlite data structure */
  db = sqlite3MallocZero( sizeof(sqlite3) );
  if( db==0 ) goto opendb_out;
  if( isThreadsafe ){
    db->mutex = sqlite3MutexAlloc(SQLITE_MUTEX_RECURSIVE);
    if( db->mutex==0 ){
................................................................................
  /* Register all built-in functions, but do not attempt to read the
  ** database schema yet. This is delayed until the first time the database
  ** is accessed.
  */
  sqlite3Error(db, SQLITE_OK, 0);
  sqlite3RegisterBuiltinFunctions(db);

  /* Load automatic extensions - extensions that have been registered
  ** using the sqlite3_automatic_extension() API.
  */
  rc = sqlite3_errcode(db);
  if( rc==SQLITE_OK ){
    sqlite3AutoLoadExtensions(db);
    rc = sqlite3_errcode(db);
    if( rc!=SQLITE_OK ){
      goto opendb_out;
    }
  }

#ifdef SQLITE_ENABLE_FTS1
  if( !db->mallocFailed ){
    extern int sqlite3Fts1Init(sqlite3*);
    rc = sqlite3Fts1Init(db);
  }
#endif
................................................................................
#endif

#ifdef SQLITE_ENABLE_RTREE
  if( !db->mallocFailed && rc==SQLITE_OK){
    rc = sqlite3RtreeInit(db);
  }
#endif













  /* -DSQLITE_DEFAULT_LOCKING_MODE=1 makes EXCLUSIVE the default locking
  ** mode.  -DSQLITE_DEFAULT_LOCKING_MODE=0 make NORMAL the default locking
  ** mode.  Doing nothing at all also makes NORMAL the default.
  */
#ifdef SQLITE_DEFAULT_LOCKING_MODE
  db->dfltLockMode = SQLITE_DEFAULT_LOCKING_MODE;
................................................................................
    return state;
  }
  if( NULL!=db ){ 
    sqlite3_close(db); /* need to close even if open returns an error */
  }
  return SQLITE_LOCKSTATE_ERROR;
}









#endif /* SQLITE_ENABLE_APPLE_SPI */







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*************************************************************************
** Main file for the SQLite library.  The routines in this file
** implement the programmer interface to the library.  Routines in
** other files are for internal use by SQLite and should not be
** accessed by users of the library.
*/
#include "sqliteInt.h"
#include <AvailabilityMacros.h>

#ifdef SQLITE_ENABLE_SQLRR
# include "sqlrr.h"
#endif 
#ifdef SQLITE_ENABLE_FTS3
# include "fts3.h"
#endif
................................................................................
#ifdef SQLITE_ENABLE_RTREE
# include "rtree.h"
#endif
#ifdef SQLITE_ENABLE_ICU
# include "sqliteicu.h"
#endif

#if defined(SQLITE_ENABLE_FLOCKTIMEOUT)&&(SQLITE_ENABLE_FLOCKTIMEOUT>0)
# if (defined(__APPLE__) && (!defined(TARGET_IPHONE_SIMULATOR)||(TARGET_IPHONE_SIMULATOR==0)) && ((TARGET_OS_EMBEDDED>0)||(MAC_OS_X_VERSION_10_9>0)))
# include "sqlite3_private.h"
#  define SQLITE_USE_FLOCKTIMEOUT 1
# endif
#endif /* SQLITE_ENABLE_FLOCKTIMEOUT */

#if defined(__APPLE__)
# include <unistd.h>
# include <dispatch/dispatch.h>
# include <dispatch/private.h>
extern void _sqlite3_purgeEligiblePagerCacheMemory();
# if defined(DISPATCH_API_VERSION)&&(DISPATCH_API_VERSION>=20100226) && \
  defined(SQLITE_ENABLE_PURGEABLE_PCACHE)&&(SQLITE_ENABLE_PURGEABLE_PCACHE>0)
#  include <dlfcn.h> /* amalgamator: keep */ 
static dispatch_source_t _cache_event_source = NULL;
# endif
#endif

/*
 ** Operator used with sqlite3_file_control to set the timeout for the next call
 ** to lock the database file via fcntl with F_SETLKWTIMEOUT.  The timeout should
 ** be passed as a pointer to a long representing the timeout in milliseconds
 */
#ifndef SQLITE_FCNTL_SET_NEXTFLOCKTIMEOUT
#define SQLITE_FCNTL_SET_NEXTFLOCKTIMEOUT      104
#define SQLITE_FCNTL_GET_NEXTFLOCKTIMEOUT      105
#endif

/*
** The version of the library
*/
#ifndef SQLITE_AMALGAMATION
/* IMPLEMENTATION-OF: R-46656-45156 The sqlite3_version[] string constant
** contains the text of SQLITE_VERSION macro. 
*/
const char sqlite3_version[] = SQLITE_VERSION;
#endif

................................................................................
      sqlite3PCacheBufferSetup( sqlite3GlobalConfig.pPage, 
          sqlite3GlobalConfig.szPage, sqlite3GlobalConfig.nPage);
      sqlite3GlobalConfig.isInit = 1;
#ifdef SQLITE_EXTRA_INIT
      bRunExtraInit = 1;
#endif
    }
    
#if defined(__APPLE__) && defined(USETHREADASSERTS)
    if ((0 != access("/var/db/disableAppleInternal", R_OK))) {
//      fprintf(stderr, "SQLite multi-threading assertions ENABLED.\n");
      
      if (sqlite3GlobalConfig.bCoreMutex != 0) {
        sqlite3GlobalConfig.bFullMutex = 1;
      }
    } else {
      sqlite3_mutex_methods *pTo = &sqlite3GlobalConfig.mutex;
      pTo->xMutexHeld = NULL;
      pTo->xMutexNotheld = NULL;
//      fprintf(stderr, "SQLite multi-threading assertions DISABLED.\n");
    }
#endif    
    
  
#if defined(DISPATCH_API_VERSION)&&(DISPATCH_API_VERSION>=20100226) && \
  defined(SQLITE_ENABLE_PURGEABLE_PCACHE)&&(SQLITE_ENABLE_PURGEABLE_PCACHE>0)
    
		dispatch_queue_t mq = dispatch_get_main_queue();
		if (mq) {
      if( NULL != dlopen("/usr/lib/libsqlite3.dylib", RTLD_LAZY) ){ 
        /* never dlclose to avoid dylib unloading */
        dispatch_async(mq, ^{
          dispatch_queue_t queue = dispatch_get_global_queue(0, 0);
          if (queue) {
            _cache_event_source = dispatch_source_create(DISPATCH_SOURCE_TYPE_VM, 0, DISPATCH_VM_PRESSURE, queue);
            if (_cache_event_source != NULL) {
              dispatch_source_set_event_handler(_cache_event_source, ^{ 
                _sqlite3_purgeEligiblePagerCacheMemory();
              });
              dispatch_resume(_cache_event_source);
            }
          }
        });
      }
		}
#endif 
  
    sqlite3GlobalConfig.inProgress = 0;
  }
  sqlite3_mutex_leave(sqlite3GlobalConfig.pInitMutex);

  /* Go back under the static mutex and clean up the recursive
  ** mutex to prevent a resource leak.
  */
................................................................................
** argument.
*/
static int sqliteDefaultBusyCallback(
 void *ptr,               /* Database connection */
 int count                /* Number of times table has been busy */
){
#if SQLITE_OS_WIN || (defined(HAVE_USLEEP) && HAVE_USLEEP)
# ifdef SQLITE_USE_FLOCKTIMEOUT
  static const u16 delays[] =
  { 1, 2, 5, 10, 15, 20, 25, 25,  25,  50,  50, 100, 100, 100, 100, 100, 100, 100, 100,  100, 100, 100,  100,  100,  100,  100,  100,  100,  100,  100,  200,  200,  200,  200,  200,  250,  250,  250,  250, 333 }; // 333, 333, 500, 500, 500, 500, 1000, 1000, 1000, 10000 };
  static const u16 totals[] =
     { 0, 1, 3,  8, 18, 33, 53, 78, 103, 128, 178, 228, 328, 428, 528, 628, 728, 828, 928, 1028, 1128, 1228, 1328, 1428, 1528, 1628, 1728, 1828, 1928, 2128, 2228, 2428, 2628, 2828, 3028, 3228, 3478, 3728, 3978, 4228, 4561, 4894, 5227, 5727, 6227, 6727, 7227, 8227, 9227 };
#else
  static const u8 delays[] =
     { 1, 2, 5, 10, 15, 20, 25, 25,  25,  50,  50, 100 };
  static const u8 totals[] =
     { 0, 1, 3,  8, 18, 33, 53, 78, 103, 128, 178, 228 };
#endif
  
# define NDELAY ArraySize(delays)
  sqlite3 *db = (sqlite3 *)ptr;
  int timeout = db->busyTimeout;
  int delay, prior;

  assert( count>=0 );
  if( count < NDELAY ){
................................................................................
    prior = totals[count];
  }else{
    delay = delays[NDELAY-1];
    prior = totals[NDELAY-1] + delay*(count-(NDELAY-1));
  }
  if( prior + delay > timeout ){
    delay = timeout - prior;
    if( delay<=0 ){
# ifdef SQLITE_USE_FLOCKTIMEOUT
      delay = 0; /* reset the delay */
      sqlite3_file_control(db, NULL, SQLITE_FCNTL_SET_NEXTFLOCKTIMEOUT, &delay);
# endif
      return 0;
    }
  }
# ifdef SQLITE_USE_FLOCKTIMEOUT
  sqlite3_file_control(db, NULL, SQLITE_FCNTL_SET_NEXTFLOCKTIMEOUT, &delay);
# else
  sqlite3OsSleep(db->pVfs, delay*1000);
# endif
  return 1;
#else
  sqlite3 *db = (sqlite3 *)ptr;
  int timeout = ((sqlite3 *)ptr)->busyTimeout;
  if( (count+1)*1000 > timeout ){
    return 0;
  }
................................................................................
  if( NULL!=autolog_client ){
    asl_close(autolog_client);
    autolog_client = NULL;
  }
}
static void _open_asl_log() {
  if( NULL==autolog_client ){
    autolog_client = asl_open(NULL, NULL, 0);
    atexit(_close_asl_log);
  }
}

void _sqlite_auto_profile_syslog(void *aux, const char *sql, u64 ns);
void _sqlite_auto_trace_syslog(void *aux, const char *sql);
void _sqlite_auto_profile_syslog(void *aux, const char *sql, u64 ns) {
#pragma unused(aux)
	asl_log(autolog_client, NULL, ASL_LEVEL_NOTICE, "Query: %s\n Execution Time: %llu ms\n", sql ? sql : "", ns / 1000000);
}
void _sqlite_auto_trace_syslog(void *aux, const char *sql) {
	asl_log(autolog_client, NULL, ASL_LEVEL_NOTICE, "TraceSQL(%p): %s\n", aux, sql ? sql : "");
}
#endif

/*
** This function is used to parse both URIs and non-URI filenames passed by the
** user to API functions sqlite3_open() or sqlite3_open_v2(), and for database
** URIs specified as part of ATTACH statements.
................................................................................
  const char *zVfs       /* Name of the VFS to use */
){
  sqlite3 *db;                    /* Store allocated handle here */
  int rc;                         /* Return code */
  int isThreadsafe;               /* True for threadsafe connections */
  char *zOpen = 0;                /* Filename argument to pass to BtreeOpen() */
  char *zErrMsg = 0;              /* Error message from sqlite3ParseUri() */
#if SQLITE_ENABLE_DATA_PROTECTION
  int protFlags = flags & SQLITE_OPEN_FILEPROTECTION_MASK;
#endif

  *ppDb = 0;
#ifndef SQLITE_OMIT_AUTOINIT
  rc = sqlite3_initialize();
  if( rc ) return rc;
#endif

................................................................................
               SQLITE_OPEN_TEMP_JOURNAL | 
               SQLITE_OPEN_SUBJOURNAL | 
               SQLITE_OPEN_MASTER_JOURNAL |
               SQLITE_OPEN_NOMUTEX |
               SQLITE_OPEN_FULLMUTEX |
               SQLITE_OPEN_WAL
             );
#if SQLITE_ENABLE_DATA_PROTECTION
  flags |= protFlags;
#endif

  /* Allocate the sqlite data structure */
  db = sqlite3MallocZero( sizeof(sqlite3) );
  if( db==0 ) goto opendb_out;
  if( isThreadsafe ){
    db->mutex = sqlite3MutexAlloc(SQLITE_MUTEX_RECURSIVE);
    if( db->mutex==0 ){
................................................................................
  /* Register all built-in functions, but do not attempt to read the
  ** database schema yet. This is delayed until the first time the database
  ** is accessed.
  */
  sqlite3Error(db, SQLITE_OK, 0);
  sqlite3RegisterBuiltinFunctions(db);













#ifdef SQLITE_ENABLE_FTS1
  if( !db->mallocFailed ){
    extern int sqlite3Fts1Init(sqlite3*);
    rc = sqlite3Fts1Init(db);
  }
#endif
................................................................................
#endif

#ifdef SQLITE_ENABLE_RTREE
  if( !db->mallocFailed && rc==SQLITE_OK){
    rc = sqlite3RtreeInit(db);
  }
#endif

  /* Load automatic extensions - extensions that have been registered
  ** using the sqlite3_automatic_extension() API.
  */
  rc = sqlite3_errcode(db);
  if( rc==SQLITE_OK ){
    sqlite3AutoLoadExtensions(db);
    rc = sqlite3_errcode(db);
    if( rc!=SQLITE_OK ){
      goto opendb_out;
    }
  }

  /* -DSQLITE_DEFAULT_LOCKING_MODE=1 makes EXCLUSIVE the default locking
  ** mode.  -DSQLITE_DEFAULT_LOCKING_MODE=0 make NORMAL the default locking
  ** mode.  Doing nothing at all also makes NORMAL the default.
  */
#ifdef SQLITE_DEFAULT_LOCKING_MODE
  db->dfltLockMode = SQLITE_DEFAULT_LOCKING_MODE;
................................................................................
    return state;
  }
  if( NULL!=db ){ 
    sqlite3_close(db); /* need to close even if open returns an error */
  }
  return SQLITE_LOCKSTATE_ERROR;
}

/*
** Returns the system defined default sqlite3_busy_handler function
**
*/
int (*_sqlite3_system_busy_handler(void))(void*,int) {
  return &sqliteDefaultBusyCallback;
}

#endif /* SQLITE_ENABLE_APPLE_SPI */

Changes to src/mutex.c.

133
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145
146
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*/
void sqlite3_mutex_leave(sqlite3_mutex *p){
  if( p ){
    sqlite3GlobalConfig.mutex.xMutexLeave(p);
  }
}

#ifndef NDEBUG
/*
** The sqlite3_mutex_held() and sqlite3_mutex_notheld() routine are
** intended for use inside assert() statements.
*/
int sqlite3_mutex_held(sqlite3_mutex *p){
  return p==0 || sqlite3GlobalConfig.mutex.xMutexHeld(p);
}
int sqlite3_mutex_notheld(sqlite3_mutex *p){
  return p==0 || sqlite3GlobalConfig.mutex.xMutexNotheld(p);
}
#endif

#endif /* !defined(SQLITE_MUTEX_OMIT) */







|





|


|




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*/
void sqlite3_mutex_leave(sqlite3_mutex *p){
  if( p ){
    sqlite3GlobalConfig.mutex.xMutexLeave(p);
  }
}

#if defined(USETHREADASSERTS) || defined(SQLITE_DEBUG)
/*
** The sqlite3_mutex_held() and sqlite3_mutex_notheld() routine are
** intended for use inside assert() statements.
*/
int sqlite3_mutex_held(sqlite3_mutex *p){
  return p==0 || (sqlite3GlobalConfig.mutex.xMutexHeld && sqlite3GlobalConfig.mutex.xMutexHeld(p));
}
int sqlite3_mutex_notheld(sqlite3_mutex *p){
  return p==0 || (sqlite3GlobalConfig.mutex.xMutexNotheld && sqlite3GlobalConfig.mutex.xMutexNotheld(p));
}
#endif

#endif /* !defined(SQLITE_MUTEX_OMIT) */

Changes to src/mutex_unix.c.

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#include <pthread.h>

/*
** The sqlite3_mutex.id, sqlite3_mutex.nRef, and sqlite3_mutex.owner fields
** are necessary under two condidtions:  (1) Debug builds and (2) using
** home-grown mutexes.  Encapsulate these conditions into a single #define.
*/
#if defined(SQLITE_DEBUG) || defined(SQLITE_HOMEGROWN_RECURSIVE_MUTEX)
# define SQLITE_MUTEX_NREF 1
#else
# define SQLITE_MUTEX_NREF 0
#endif

/*
** Each recursive mutex is an instance of the following structure.
................................................................................
** will not always work correctly on HPUX.
**
** On those platforms where pthread_equal() is not atomic, SQLite
** should be compiled without -DSQLITE_DEBUG and with -DNDEBUG to
** make sure no assert() statements are evaluated and hence these
** routines are never called.
*/
#if !defined(NDEBUG) || defined(SQLITE_DEBUG)
static int pthreadMutexHeld(sqlite3_mutex *p){
  return (p->nRef!=0 && pthread_equal(p->owner, pthread_self()));
}
static int pthreadMutexNotheld(sqlite3_mutex *p){
  return p->nRef==0 || pthread_equal(p->owner, pthread_self())==0;
}
#endif
................................................................................
    pthreadMutexInit,
    pthreadMutexEnd,
    pthreadMutexAlloc,
    pthreadMutexFree,
    pthreadMutexEnter,
    pthreadMutexTry,
    pthreadMutexLeave,
#ifdef SQLITE_DEBUG
    pthreadMutexHeld,
    pthreadMutexNotheld
#else
    0,
    0
#endif
  };

  return &sMutex;
}

#endif /* SQLITE_MUTEX_PTHREADS */







|







 







|







 







|












25
26
27
28
29
30
31
32
33
34
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..
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...
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350
351
#include <pthread.h>

/*
** The sqlite3_mutex.id, sqlite3_mutex.nRef, and sqlite3_mutex.owner fields
** are necessary under two condidtions:  (1) Debug builds and (2) using
** home-grown mutexes.  Encapsulate these conditions into a single #define.
*/
#if defined(SQLITE_DEBUG) || defined(SQLITE_HOMEGROWN_RECURSIVE_MUTEX) || defined(USETHREADASSERTS)
# define SQLITE_MUTEX_NREF 1
#else
# define SQLITE_MUTEX_NREF 0
#endif

/*
** Each recursive mutex is an instance of the following structure.
................................................................................
** will not always work correctly on HPUX.
**
** On those platforms where pthread_equal() is not atomic, SQLite
** should be compiled without -DSQLITE_DEBUG and with -DNDEBUG to
** make sure no assert() statements are evaluated and hence these
** routines are never called.
*/
#if defined(USETHREADASSERTS) || defined(SQLITE_DEBUG)
static int pthreadMutexHeld(sqlite3_mutex *p){
  return (p->nRef!=0 && pthread_equal(p->owner, pthread_self()));
}
static int pthreadMutexNotheld(sqlite3_mutex *p){
  return p->nRef==0 || pthread_equal(p->owner, pthread_self())==0;
}
#endif
................................................................................
    pthreadMutexInit,
    pthreadMutexEnd,
    pthreadMutexAlloc,
    pthreadMutexFree,
    pthreadMutexEnter,
    pthreadMutexTry,
    pthreadMutexLeave,
#if defined(USETHREADASSERTS) || defined(SQLITE_DEBUG)
    pthreadMutexHeld,
    pthreadMutexNotheld
#else
    0,
    0
#endif
  };

  return &sMutex;
}

#endif /* SQLITE_MUTEX_PTHREADS */

Changes to src/os_unix.c.

43
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8128
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....
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8271
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**   *  Definitions of sqlite3_vfs objects for all locking methods
**      plus implementations of sqlite3_os_init() and sqlite3_os_end().
*/
#include "sqliteInt.h"
#if SQLITE_OS_UNIX              /* This file is used on unix only */

#include "btreeInt.h"           /* Use by Apple extensions only */



/*
** There are various methods for file locking used for concurrency
** control:
**
**   1. POSIX locking (the default),
................................................................................
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <time.h>
#include <sys/time.h>

#include <errno.h>
#if !defined(SQLITE_OMIT_WAL) || SQLITE_MAX_MMAP_SIZE>0
#include <sys/mman.h>
#endif


#if SQLITE_ENABLE_LOCKING_STYLE
# include <sys/ioctl.h>
# include <uuid/uuid.h>
# if defined(__APPLE__) && ((__MAC_OS_X_VERSION_MIN_REQUIRED > 1050) || \
                            (__IPHONE_OS_VERSION_MIN_REQUIRED > 2000))

#  define HAVE_GETHOSTUUID 1




# endif
# if OS_VXWORKS
#  include <semaphore.h>
#  include <limits.h>
# else
#  include <sys/file.h>
#  include <sys/param.h>
# endif
#endif /* SQLITE_ENABLE_LOCKING_STYLE */

#if defined(__APPLE__) || (SQLITE_ENABLE_LOCKING_STYLE && !OS_VXWORKS)
# include <sys/mount.h>
#endif




#ifdef HAVE_UTIME
# include <utime.h>
#endif







/*
** Allowed values of unixFile.fsFlags
*/
#define SQLITE_FSFLAGS_IS_MSDOS     0x1


/*
** If we are to be thread-safe, include the pthreads header and define
** the SQLITE_UNIX_THREADS macro.
*/
#if SQLITE_THREADSAFE
# include <pthread.h>
# define SQLITE_UNIX_THREADS 1
#endif



































































































































/*
** Default permissions when creating a new file
*/
#ifndef SQLITE_DEFAULT_FILE_PERMISSIONS
# define SQLITE_DEFAULT_FILE_PERMISSIONS 0644
#endif

................................................................................
#ifndef SQLITE_DEFAULT_PROXYDIR_PERMISSIONS
# define SQLITE_DEFAULT_PROXYDIR_PERMISSIONS 0755
#endif

/*
** Maximum supported path-length.
*/
#define MAX_PATHNAME 512

/*
** Only set the lastErrno if the error code is a real error and not 
** a normal expected return code of SQLITE_BUSY or SQLITE_OK
*/
#define IS_LOCK_ERROR(x)  ((x != SQLITE_OK) && (x != SQLITE_BUSY))

................................................................................
#endif
#if SQLITE_ENABLE_DATA_PROTECTION
  int protFlags;                      /* Data protection flags from unixOpen */
#endif
#if SQLITE_ENABLE_LOCKING_STYLE || defined(__APPLE__)
  unsigned fsFlags;                   /* cached details from statfs() */
#endif



#if OS_VXWORKS
  struct vxworksFileId *pId;          /* Unique file ID */
#endif
#ifdef SQLITE_DEBUG
  /* The next group of variables are used to track whether or not the
  ** transaction counter in bytes 24-27 of database files are updated
  ** whenever any part of the database changes.  An assertion fault will
................................................................................
#endif

#ifdef SQLITE_TEST
  /* In test mode, increase the size of this structure a bit so that 
  ** it is larger than the struct CrashFile defined in test6.c.
  */
  char aPadding[32];








#endif
};

/* This variable holds the process id (pid) from when the xRandomness()
** method was called.  If xOpen() is called from a different process id,
** indicating that a fork() has occurred, the PRNG will be reset.
*/
................................................................................
** Different Unix systems declare open() in different ways.  Same use
** open(const char*,int,mode_t).  Others use open(const char*,int,...).
** The difference is important when using a pointer to the function.
**
** The safest way to deal with the problem is to always use this wrapper
** which always has the same well-defined interface.
*/
static int posixOpen(const char *zFile, int flags, int mode){

























































































  return open(zFile, flags, mode);
}

/*
** On some systems, calls to fchown() will trigger a message in a security
** log if they come from non-root processes.  So avoid calling fchown() if
** we are not running as root.
*/
static int posixFchown(int fd, uid_t uid, gid_t gid){
  return geteuid() ? 0 : fchown(fd,uid,gid);
}




































/* Forward reference */
static int openDirectory(const char*, int*);
static int unixGetpagesize(void);

/*
** Many system calls are accessed through pointer-to-functions so that
................................................................................
** to all overrideable system calls.
*/
static struct unix_syscall {
  const char *zName;            /* Name of the system call */
  sqlite3_syscall_ptr pCurrent; /* Current value of the system call */
  sqlite3_syscall_ptr pDefault; /* Default value */
} aSyscall[] = {
  { "open",         (sqlite3_syscall_ptr)posixOpen,  0  },
#define osOpen      ((int(*)(const char*,int,int))aSyscall[0].pCurrent)

  { "close",        (sqlite3_syscall_ptr)close,      0  },
#define osClose     ((int(*)(int))aSyscall[1].pCurrent)

  { "access",       (sqlite3_syscall_ptr)access,     0  },
#define osAccess    ((int(*)(const char*,int))aSyscall[2].pCurrent)

  { "getcwd",       (sqlite3_syscall_ptr)getcwd,     0  },
#define osGetcwd    ((char*(*)(char*,size_t))aSyscall[3].pCurrent)
................................................................................
#if defined(USE_PREAD64)
  { "pread64",      (sqlite3_syscall_ptr)pread64,    0  },
#else
  { "pread64",      (sqlite3_syscall_ptr)0,          0  },
#endif
#define osPread64   ((ssize_t(*)(int,void*,size_t,off_t))aSyscall[10].pCurrent)

  { "write",        (sqlite3_syscall_ptr)write,      0  },
#define osWrite     ((ssize_t(*)(int,const void*,size_t))aSyscall[11].pCurrent)

#if defined(USE_PREAD) || SQLITE_ENABLE_LOCKING_STYLE
  { "pwrite",       (sqlite3_syscall_ptr)pwrite,     0  },
#else
  { "pwrite",       (sqlite3_syscall_ptr)0,          0  },
#endif
#define osPwrite    ((ssize_t(*)(int,const void*,size_t,off_t))\
                    aSyscall[12].pCurrent)

#if defined(USE_PREAD64)
................................................................................

#if !defined(SQLITE_OMIT_WAL) || SQLITE_MAX_MMAP_SIZE>0
  { "mmap",       (sqlite3_syscall_ptr)mmap,     0 },
#define osMmap ((void*(*)(void*,size_t,int,int,int,off_t))aSyscall[21].pCurrent)

  { "munmap",       (sqlite3_syscall_ptr)munmap,          0 },
#define osMunmap ((void*(*)(void*,size_t))aSyscall[22].pCurrent)



#if HAVE_MREMAP
  { "mremap",       (sqlite3_syscall_ptr)mremap,          0 },
#else
  { "mremap",       (sqlite3_syscall_ptr)0,               0 },
#endif
#define osMremap ((void*(*)(void*,size_t,size_t,int,...))aSyscall[23].pCurrent)
................................................................................
** and -shm files.  We want those files to have *exactly* the same
** permissions as their original database, unadulterated by the umask.
** In that way, if a database file is -rw-rw-rw or -rw-rw-r-, and a
** transaction crashes and leaves behind hot journals, then any
** process that is able to write to the database will also be able to
** recover the hot journals.
*/
static int robust_open(const char *z, int f, mode_t m){
  int fd;
  mode_t m2 = m ? m : SQLITE_DEFAULT_FILE_PERMISSIONS;
  while(1){
#if defined(O_CLOEXEC)
    fd = osOpen(z,f|O_CLOEXEC,m2);
#else
    fd = osOpen(z,f,m2);
#endif
    if( fd<0 ){
      if( errno==EINTR ) continue;
      break;


    }
    if( fd>=SQLITE_MINIMUM_FILE_DESCRIPTOR ) break;
    osClose(fd);
    sqlite3_log(SQLITE_WARNING, 
                "attempt to open \"%s\" as file descriptor %d", z, fd);
    fd = -1;

    if( osOpen("/dev/null", f, m)<0 ) break;

  }
  if( fd>=0 ){
    if( m!=0 ){
      struct stat statbuf;
      if( osFstat(fd, &statbuf)==0 
       && statbuf.st_size==0
       && (statbuf.st_mode&0777)!=m 
      ){
        osFchmod(fd, m);
      }
    }
#if defined(FD_CLOEXEC) && (!defined(O_CLOEXEC) || O_CLOEXEC==0)
    osFcntl(fd, F_SETFD, osFcntl(fd, F_GETFD, 0) | FD_CLOEXEC);
#endif
  }
  return fd;
}





/*
** Helper functions to obtain and relinquish the global mutex. The
** global mutex is used to protect the unixInodeInfo and
** vxworksFileId objects used by this file, all of which may be 
** shared by multiple threads.
**
................................................................................
static void closePendingFds(unixFile *pFile){
  unixInodeInfo *pInode = pFile->pInode;
  UnixUnusedFd *p;
  UnixUnusedFd *pNext;
  for(p=pInode->pUnused; p; p=pNext){
    pNext = p->pNext;
#if OSCLOSE_CHECK_CLOSE_IOERR
    if( close(p->fd) ){
      storeLastErrno(pFile, errno);
      rc = SQLITE_IOERR_CLOSE;
      p->pNext = pError;
      pError = p;
    }else{
      sqlite3_free(p);
    }
................................................................................
  ** prior to accessing the inode number.  The one byte written is
  ** an ASCII 'S' character which also happens to be the first byte
  ** in the header of every SQLite database.  In this way, if there
  ** is a race condition such that another thread has already populated
  ** the first page of the database, no damage is done.
  */
  if( statbuf.st_size==0 && (pFile->fsFlags & SQLITE_FSFLAGS_IS_MSDOS)!=0 ){
    do{ rc = osWrite(fd, "S", 1); }while( rc<0 && errno==EINTR );
    if( rc!=1 ){
      storeLastErrno(pFile, errno);
      return SQLITE_IOERR;
    }
    rc = osFstat(fd, &statbuf);
    if( rc!=0 ){
      storeLastErrno(pFile, errno);
................................................................................
    if( pInode->bProcessLock==0 ){
      struct flock lock;
      assert( pInode->nLock==0 );
      lock.l_whence = SEEK_SET;
      lock.l_start = SHARED_FIRST;
      lock.l_len = SHARED_SIZE;
      lock.l_type = F_WRLCK;
















      rc = osFcntl(pFile->h, F_SETLK, &lock);




      if( rc<0 ) return rc;
      pInode->bProcessLock = 1;
      pInode->nLock++;
    }else{
      rc = 0;
    }
  }else{
    int i = 0;                      
    do {



























      rc = osFcntl(pFile->h, F_SETLK, pLock);
      if( rc && nRetry ){
         usleep(100 * (++i));
      }

    }while( !rc && nRetry-- );
  }
  return rc;
}

/*
** Lock the file with the lock specified by parameter eFileLock - one
................................................................................
  /* If some thread using this PID has a lock via a different unixFile*
  ** handle that precludes the requested lock, return BUSY.
  */
  if( (pFile->eFileLock!=pInode->eFileLock && 
          (pInode->eFileLock>=PENDING_LOCK || eFileLock>SHARED_LOCK))
  ){
    rc = SQLITE_BUSY;





    goto end_lock;
  }

  /* If a SHARED lock is requested, and some thread using this PID already
  ** has a SHARED or RESERVED lock, then increment reference counts and
  ** return SQLITE_OK.
  */
................................................................................
      pInode->nLock++;
      pInode->nShared = 1;
    }
  }else if( eFileLock==EXCLUSIVE_LOCK && pInode->nShared>1 ){
    /* We are trying for an exclusive lock but another thread in this
    ** same process is still holding a shared lock. */
    rc = SQLITE_BUSY;





  }else{
    /* The request was for a RESERVED or EXCLUSIVE lock.  It is
    ** assumed that there is a SHARED or greater lock on the file
    ** already.
    */
    assert( 0!=pFile->eFileLock );
    lock.l_type = F_WRLCK;
................................................................................
** vxworksReleaseFileId() routine.
*/
static int closeUnixFile(sqlite3_file *id){
  unixFile *pFile = (unixFile*)id;
#if SQLITE_MAX_MMAP_SIZE>0
  unixUnmapfile(pFile);
#endif











  if( pFile->h>=0 ){
    robust_close(pFile, pFile->h, __LINE__);
    pFile->h = -1;
  }

#if OS_VXWORKS
  if( pFile->pId ){
    if( pFile->ctrlFlags & UNIXFILE_DELETE ){
      osUnlink(pFile->pId->zCanonicalName);
    }
    vxworksReleaseFileId(pFile->pId);
    pFile->pId = 0;
................................................................................
  /* grab an exclusive lock */
  rc = osMkdir(zLockFile, 0777);
  if( rc<0 ){
    /* failed to open/create the lock directory */
    int tErrno = errno;
    if( EEXIST == tErrno ){
      rc = SQLITE_BUSY;





    } else {
      rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_LOCK);
      if( IS_LOCK_ERROR(rc) ){
        storeLastErrno(pFile, tErrno);
      }
    }
    return rc;
................................................................................
    pFile->eFileLock = eFileLock;
  }
  OSTRACE(("LOCK    %d %s %s (flock)\n", pFile->h, azFileLock(eFileLock), 
           rc==SQLITE_OK ? "ok" : "failed"));
#ifdef SQLITE_IGNORE_FLOCK_LOCK_ERRORS
  if( (rc & SQLITE_IOERR) == SQLITE_IOERR ){
    rc = SQLITE_BUSY;





  }
#endif /* SQLITE_IGNORE_FLOCK_LOCK_ERRORS */
  return rc;
}


/*
................................................................................
    rc = SQLITE_OK;
    goto sem_end_lock;
  }
  
  /* lock semaphore now but bail out when already locked. */
  if( sem_trywait(pSem)==-1 ){
    rc = SQLITE_BUSY;





    goto sem_end_lock;
  }

  /* got it, set the type and return ok */
  pFile->eFileLock = eFileLock;

 sem_end_lock:
................................................................................
#else
    rc = sqliteErrorFromPosixError(tErrno,
                    setLockFlag ? SQLITE_IOERR_LOCK : SQLITE_IOERR_UNLOCK);
#endif /* SQLITE_IGNORE_AFP_LOCK_ERRORS */
    if( IS_LOCK_ERROR(rc) ){
      storeLastErrno(pFile, tErrno);
    }





    return rc;
  } else {
    return SQLITE_OK;
  }
}

/*
................................................................................
  /* If some thread using this PID has a lock via a different unixFile*
  ** handle that precludes the requested lock, return BUSY.
  */
  if( (pFile->eFileLock!=pInode->eFileLock && 
       (pInode->eFileLock>=PENDING_LOCK || eFileLock>SHARED_LOCK))
     ){
    rc = SQLITE_BUSY;





    goto afp_end_lock;
  }
  
  /* If a SHARED lock is requested, and some thread using this PID already
  ** has a SHARED or RESERVED lock, then increment reference counts and
  ** return SQLITE_OK.
  */
................................................................................
      pInode->nLock++;
      pInode->nShared = 1;
    }
  }else if( eFileLock==EXCLUSIVE_LOCK && pInode->nShared>1 ){
    /* We are trying for an exclusive lock but another thread in this
     ** same process is still holding a shared lock. */
    rc = SQLITE_BUSY;





  }else{
    /* The request was for a RESERVED or EXCLUSIVE lock.  It is
    ** assumed that there is a SHARED or greater lock on the file
    ** already.
    */
    int failed = 0;
    assert( 0!=pFile->eFileLock );
................................................................................
    pFile->inNormalWrite = 0;
#endif
    
    if( pFile->eFileLock==EXCLUSIVE_LOCK ){
      rc = afpSetLock(context->dbPath, pFile, SHARED_FIRST, SHARED_SIZE, 0);
      if( rc==SQLITE_OK && (eFileLock==SHARED_LOCK || pInode->nShared>1) ){
        /* only re-establish the shared lock if necessary */
        int sharedLockByte = SHARED_FIRST+pInode->sharedByte;
        rc = afpSetLock(context->dbPath, pFile, sharedLockByte, 1, 1);
      } else {
        skipShared = 1;
      }
    }
    if( rc==SQLITE_OK && pFile->eFileLock>=PENDING_LOCK ){
      rc = afpSetLock(context->dbPath, pFile, PENDING_BYTE, 1, 0);
................................................................................
*/
static int seekAndRead(unixFile *id, sqlite3_int64 offset, void *pBuf, int cnt){
  int got;
  int prior = 0;
#if (!defined(USE_PREAD) && !defined(USE_PREAD64))
  i64 newOffset;
#endif







  TIMER_START;
  assert( cnt==(cnt&0x1ffff) );
  assert( id->h>2 );
  cnt &= 0x1ffff;
  do{
#if defined(USE_PREAD)
    got = osPread(id->h, pBuf, cnt, offset);
    SimulateIOError( got = -1 );
#elif defined(USE_PREAD64)
    got = osPread64(id->h, pBuf, cnt, offset);
    SimulateIOError( got = -1 );
#else
    newOffset = lseek(id->h, offset, SEEK_SET);
    SimulateIOError( newOffset-- );
................................................................................
  int fd,                         /* File descriptor to write to */
  i64 iOff,                       /* File offset to begin writing at */
  const void *pBuf,               /* Copy data from this buffer to the file */
  int nBuf,                       /* Size of buffer pBuf in bytes */
  int *piErrno                    /* OUT: Error number if error occurs */
){
  int rc = 0;                     /* Value returned by system call */




  assert( nBuf==(nBuf&0x1ffff) );
  assert( fd>2 );
  nBuf &= 0x1ffff;
  TIMER_START;

#if defined(USE_PREAD)
................................................................................
** Seek to the offset in id->offset then read cnt bytes into pBuf.
** Return the number of bytes actually read.  Update the offset.
**
** To avoid stomping the errno value on a failed write the lastErrno value
** is set before returning.
*/
static int seekAndWrite(unixFile *id, i64 offset, const void *pBuf, int cnt){






  return seekAndWriteFd(id->h, offset, pBuf, cnt, &id->lastErrno);
}


/*
** Write data from a buffer into a file.  Return SQLITE_OK on success
** or some other error code on failure.
................................................................................
  int fd = -1;
  char zDirname[MAX_PATHNAME+1];

  sqlite3_snprintf(MAX_PATHNAME, zDirname, "%s", zFilename);
  for(ii=(int)strlen(zDirname); ii>1 && zDirname[ii]!='/'; ii--);
  if( ii>0 ){
    zDirname[ii] = '\0';
    fd = robust_open(zDirname, O_RDONLY|O_BINARY, 0);
    if( fd>=0 ){
      OSTRACE(("OPENDIR %-3d %s\n", fd, zDirname));
    }
  }
  *pFd = fd;
  return (fd>=0?SQLITE_OK:unixLogError(SQLITE_CANTOPEN_BKPT, "open", zDirname));
}
................................................................................
    int dirfd;
    OSTRACE(("DIRSYNC %s (have_fullfsync=%d fullsync=%d)\n", pFile->zPath,
            HAVE_FULLFSYNC, isFullsync));
    rc = osOpenDirectory(pFile->zPath, &dirfd);
    if( rc==SQLITE_OK && dirfd>=0 ){
      full_fsync(dirfd, 0, 0);
#if OSCLOSE_CHECK_CLOSE_IOERR
      if( close(pFile->dirfd) ){
        storeLastErrno(pFile, errno);
        rc = SQLITE_IOERR_DIR_CLOSE;
      }
#else
      robust_close(pFile, dirfd, __LINE__);
#endif
    }else if( rc==SQLITE_CANTOPEN ){
................................................................................
** nBytes or larger, this routine is a no-op.
*/
static int fcntlSizeHint(unixFile *pFile, i64 nByte){
  if( pFile->szChunk>0 ){
    i64 nSize;                    /* Required file size */
    struct stat buf;              /* Used to hold return values of fstat() */
   
    if( osFstat(pFile->h, &buf) ) return SQLITE_IOERR_FSTAT;




    nSize = ((nByte+pFile->szChunk-1) / pFile->szChunk) * pFile->szChunk;
    if( nSize>(i64)buf.st_size ){

#if defined(HAVE_POSIX_FALLOCATE) && HAVE_POSIX_FALLOCATE
      /* The code below is handling the return value of osFallocate() 
      ** correctly. posix_fallocate() is defined to "returns zero on success, 
................................................................................
    return rc;
  }
#endif

  return SQLITE_OK;
}










































#if (SQLITE_ENABLE_APPLE_SPI>0) && defined(__APPLE__)
#include "sqlite3_private.h"
#include <copyfile.h>
static int getDbPathForUnixFile(unixFile *pFile, char *dbPath);
#endif

#if SQLITE_ENABLE_LOCKING_STYLE
static int isProxyLockingMode(unixFile *);
#endif

#if (SQLITE_ENABLE_APPLE_SPI>0) && defined(__APPLE__)
static int unixTruncateDatabase(unixFile *, int);


static int unixInvalidateSupportFiles(unixFile *, int);

static int findCreateFileMode(const char *, int, mode_t*, uid_t *,gid_t *);

/* opens a read/write connection to a file zName inheriting the appropriate
** user/perms from the database file if running as root.  Returns the file 
................................................................................
  int *pFd
){
  int fd = -1;
  mode_t openMode;              /* Permissions to create file with */
  uid_t uid;                    /* Userid for the file */
  gid_t gid;                    /* Groupid for the file */
  int rc;

  







  assert(pFd!=NULL);
  rc = findCreateFileMode(zName, dbOpenFlags, &openMode, &uid, &gid);
  if( rc!=SQLITE_OK ){
    return rc;
  }


  fd = robust_open(zName, openFlags, openMode);
  OSTRACE(("OPENX   %-3d %s 0%o\n", fd, zName, openFlags));
  if( fd<0 ){





    rc = unixLogError(SQLITE_CANTOPEN_BKPT, "open", zName);




    return rc;
  }
  /* if we're opening the wal or journal and running as root, set
  ** the journal uid/gid */
  if( dbOpenFlags & (SQLITE_OPEN_WAL|SQLITE_OPEN_MAIN_JOURNAL) ){
    uid_t euid = geteuid();
    if( euid==0 && (euid!=uid || getegid()!=gid) ){
      if( fchown(fd, uid, gid) ){
        rc = SQLITE_CANTOPEN_BKPT;
      }
    }
  }

  if( rc==SQLITE_OK ){




    *pFd = fd;
  } else {
    *pFd = -1;
    close(fd);
  }
  return rc;
}



























































































































static int unixReplaceDatabase(unixFile *pFile, sqlite3 *srcdb) {
  sqlite3_file *id = (sqlite3_file *)pFile;
  Btree *pSrcBtree = NULL;
  sqlite3_file *src_file = NULL;
  unixFile *pSrcFile = NULL;
  char srcWalPath[MAXPATHLEN+5];
  int srcWalFD = -1;
  int rc = SQLITE_OK;
  void *pLock = NULL;
  int flags = 0;
  sqlite3 *srcdb2 = NULL;
  copyfile_state_t s;
  int corruptSrcFileLock = 0;
  int corruptDstFileLock = 0;
  int isSrcCorrupt = 0;
  int isDstCorrupt = 0;











  
  if( !sqlite3SafetyCheckOk(srcdb) ){
    return SQLITE_MISUSE;
  }
    




















#if SQLITE_ENABLE_DATA_PROTECTION
  flags |= pFile->protFlags;
#endif
#if SQLITE_ENABLE_LOCKING_STYLE
  if( isProxyLockingMode(pFile) ){
    flags |= SQLITE_OPEN_AUTOPROXY;
  }
#endif
  
  rc = sqlite3demo_superlock(pFile->zPath, 0, flags, 0, 0, &pLock);
  if( rc ){
    if( rc==SQLITE_CORRUPT || rc==SQLITE_NOTADB ){
      isDstCorrupt = 1;
      rc = sqlite3demo_superlock_corrupt(id, SQLITE_LOCK_EXCLUSIVE,
                                         &corruptDstFileLock);
    }
    if( rc ){
      return rc;
    }


  }
  /* get the src file descriptor adhering to the db struct access rules 
   ** this code is modeled after sqlite3_file_control() in main.c
   */ 
  sqlite3_mutex_enter(srcdb->mutex);
  if( srcdb->nDb>0 ){
    pSrcBtree = srcdb->aDb[0].pBt;
................................................................................
    Pager *pSrcPager;
    sqlite3BtreeEnter(pSrcBtree);
    pSrcPager = sqlite3BtreePager(pSrcBtree);
    assert( pSrcPager!=0 );
    src_file = sqlite3PagerFile(pSrcPager);
    assert( src_file!=0 );
    if( src_file->pMethods ){
      int srcFlags = 0;
      pSrcFile = (unixFile *)src_file;
#if SQLITE_ENABLE_LOCKING_STYLE || defined(__APPLE__)
      if ((pSrcFile->openFlags & O_RDWR) == O_RDWR) {
        srcFlags = SQLITE_OPEN_READWRITE;
      } else {
        srcFlags = SQLITE_OPEN_READONLY;
      }
................................................................................
      srcFlags |= pSrcFile->protFlags;
#endif
#if SQLITE_ENABLE_LOCKING_STYLE
      if( isProxyLockingMode(pSrcFile) ){
        srcFlags |= SQLITE_OPEN_AUTOPROXY;
      }
#endif

      rc = sqlite3_open_v2(pSrcFile->zPath, &srcdb2, srcFlags, 0);
      if( rc==SQLITE_OK ){










        /* start a deferred transaction and read to establish a read lock */
        rc = sqlite3_exec(srcdb2, "BEGIN DEFERRED; PRAGMA schema_version",
                          0, 0, 0);




























        if( rc==SQLITE_CORRUPT || rc==SQLITE_NOTADB ){
          isSrcCorrupt = 1;
          rc = sqlite3demo_superlock_corrupt(src_file, SQLITE_LOCK_SHARED,
                                             &corruptSrcFileLock);
        }
      }
    }
  }
  if( !srcdb2 || pSrcFile==NULL || pSrcFile->h<0){
    rc = SQLITE_INTERNAL;
  }
  if( rc!=SQLITE_OK ){
    goto end_replace_database;
  }





































































































































































  /* both databases are locked appropriately, copy the src wal journal if 
   ** one exists and then the actual database file
   */
  strlcpy(srcWalPath, pSrcFile->zPath, MAXPATHLEN+5);
  strlcat(srcWalPath, "-wal", MAXPATHLEN+5);

  srcWalFD = open(srcWalPath, O_RDONLY);

  if( !(srcWalFD<0) ){
    char dstWalPath[MAXPATHLEN+5];
    int dstWalFD = -1;
    int protFlags = 0;
    strlcpy(dstWalPath, pFile->zPath, MAXPATHLEN+5);
    strlcat(dstWalPath, "-wal", MAXPATHLEN+5);




    rc = unixOpenChildFile(dstWalPath, O_RDWR|O_CREAT, SQLITE_OPEN_WAL,
                           protFlags, &dstWalFD);
    if( rc==SQLITE_OK ){
      s = copyfile_state_alloc();
      lseek(srcWalFD, 0, SEEK_SET);
      lseek(dstWalFD, 0, SEEK_SET);
      if( fcopyfile(srcWalFD, dstWalFD, s, COPYFILE_DATA) ){
        int err=errno;
        switch(err) {
          case ENOMEM:
            rc = SQLITE_NOMEM;
            break;
          default:
            storeLastErrno(pFile, err);
            rc = SQLITE_IOERR;
        }
      }

      copyfile_state_free(s);

      close(dstWalFD);
    }
    close(srcWalFD);
  }
  if( rc==SQLITE_OK ){
    /* before we copy, ensure that the file change counter will be modified */
    uint32_t srcChange = 0;
    uint32_t dstChange = 0;
    pread(pSrcFile->h, &srcChange, 4, 24);
    pread(pFile->h, &dstChange, 4, 24);
    
    /* copy the actual database */
    s = copyfile_state_alloc();
    lseek(pSrcFile->h, 0, SEEK_SET);
    lseek(pFile->h, 0, SEEK_SET);
    if( fcopyfile(pSrcFile->h, pFile->h, s, COPYFILE_DATA) ){
      int err=errno;
      switch(err) {
        case ENOMEM:
          rc = SQLITE_NOMEM;
          break;
        default:
          storeLastErrno(pFile, err);
................................................................................
      }
    }
    copyfile_state_free(s);
    
    if (srcChange == dstChange) {
      /* modify the change counter to force page zero to be reloaded */
      dstChange ++;
      pwrite(pFile->h, &dstChange, 4, 24);
    }
  }
  if( isSrcCorrupt ){
    sqlite3demo_superunlock_corrupt(src_file, corruptSrcFileLock);
  }else{
    /* done with the source db so end the transaction */
    sqlite3_exec(srcdb2, "COMMIT", 0, 0, 0);
  }
  /* zero out any old journal clutter */
  if( rc==SQLITE_OK ){
    int skipWAL = (srcWalFD<0)?0:1;
    unixInvalidateSupportFiles(pFile, skipWAL);

  }
  
end_replace_database:
  if( pSrcBtree ){

















    sqlite3_close(srcdb2);



    sqlite3BtreeLeave(pSrcBtree);
  }
  sqlite3_mutex_leave(srcdb->mutex);
  if( isDstCorrupt ){
    sqlite3demo_superunlock_corrupt(id, corruptDstFileLock);
  }else{
    sqlite3demo_superunlock(pLock);
  }


























  return rc;
}
#define SQLITE_FILE_HEADER_LEN 16
/* Check for a conflicting lock.  If one is found, print an this
 ** on standard output using the format string given and return 1.
 ** If there are no conflicting locks, return 0.
 */
................................................................................
    return -1;
  }
  
  if( lk.l_type!=F_UNLCK && (pid==SQLITE_LOCKSTATE_ANYPID || lk.l_pid==pid) ){
#ifdef SQLITE_DEBUG
    fprintf(stderr, "%s lock held by %d\n", zType, (int)lk.l_pid);
#endif


    return 1;
  } 


  return 0;
}

static int unixLockstatePid(unixFile *, pid_t, int *);












































#endif /* (SQLITE_ENABLE_APPLE_SPI>0) && defined(__APPLE__) */


/*
** If *pArg is inititially negative then this is a query.  Set *pArg to
** 1 or 0 depending on whether or not bit mask of pFile->ctrlFlags is set.
................................................................................
      }
      pLockstate = (LockstatePID *)pArg;
      rc = unixLockstatePid(pFile, pLockstate->pid, &(pLockstate->state));
      return rc;
    }
      
#endif /* (SQLITE_ENABLE_APPLE_SPI>0) && defined(__APPLE__) */














  }
  return SQLITE_NOTFOUND;
}

/*
** Return the sector size in bytes of the underlying block device for
** the specified file. This is almost always 512 bytes, but may be
................................................................................
** otherwise.
*/
static int unixShmSystemLock(
  unixShmNode *pShmNode, /* Apply locks to this open shared-memory segment */
  int lockType,          /* F_UNLCK, F_RDLCK, or F_WRLCK */
  int ofst,              /* First byte of the locking range */
  int n                  /* Number of bytes to lock */



){
  struct flock f;       /* The posix advisory locking structure */
  int rc = SQLITE_OK;   /* Result code form fcntl() */

  /* Access to the unixShmNode object is serialized by the caller */
  assert( sqlite3_mutex_held(pShmNode->mutex) || pShmNode->nRef==0 );

................................................................................
    /* Initialize the locking parameters */
    memset(&f, 0, sizeof(f));
    f.l_type = lockType;
    f.l_whence = SEEK_SET;
    f.l_start = ofst;
    f.l_len = n;













    rc = osFcntl(pShmNode->h, F_SETLK, &f);




    rc = (rc!=(-1)) ? SQLITE_OK : SQLITE_BUSY;
  }

  /* Update the global lock state and do debug tracing */
#ifdef SQLITE_DEBUG
  { u16 mask;
  OSTRACE(("SHM-LOCK "));
................................................................................
    const char *zBasePath = pDbFd->zPath;

    /* Call fstat() to figure out the permissions on the database file. If
    ** a new *-shm file is created, an attempt will be made to create it
    ** with the same permissions.
    */
    if( osFstat(pDbFd->h, &sStat) && pInode->bProcessLock==0 ){

      rc = SQLITE_IOERR_FSTAT;
      goto shm_open_err;
    }

#if defined(__APPLE__) && SQLITE_ENABLE_LOCKING_STYLE
    /* If pDbFd is configured with proxy locking mode, use the local 
     ** lock file path to determine the -shm file path
................................................................................
    || defined(__APPLE__))
         || (pDbFd->openFlags & O_RDWR) != O_RDWR
#endif
         ){
        openFlags = O_RDONLY;
        pShmNode->isReadonly = 1;
      }




      pShmNode->h = robust_open(zShmFilename, openFlags, (sStat.st_mode&0777));

      if( pShmNode->h<0 ){




        rc = unixLogError(SQLITE_CANTOPEN_BKPT, "open", zShmFilename);




        goto shm_open_err;
      }















      /* Check to see if another process is holding the dead-man switch.
      ** If not, truncate the file to zero length. 
      */
      rc = SQLITE_OK;




      if( unixShmSystemLock(pShmNode, F_WRLCK, UNIX_SHM_DMS, 1)==SQLITE_OK ){

        if( robust_ftruncate(pShmNode->h, 0) ){
          rc = unixLogError(SQLITE_IOERR_SHMOPEN, "ftruncate", zShmFilename);
        }else{
          /* If running as root set the uid/gid of the shm file to match
          ** the database */
          uid_t euid = geteuid();
          if( (!pShmNode->isReadonly) && euid==0 && (euid!=sStat.st_uid || getegid()!=sStat.st_gid) ){
................................................................................
            if( osFchown(pShmNode->h, sStat.st_uid, sStat.st_gid) ){
              rc = SQLITE_IOERR_SHMOPEN;
            }
          }
        }
      }
      if( rc==SQLITE_OK ){






        rc = unixShmSystemLock(pShmNode, F_RDLCK, UNIX_SHM_DMS, 1);

      }
      if( rc ) goto shm_open_err;
    }
  }

  /* Make the new connection a child of the unixShmNode */
  p->pShmNode = pShmNode;
................................................................................
static int unixShmMap(
  sqlite3_file *fd,               /* Handle open on database file */
  int iRegion,                    /* Region to retrieve */
  int szRegion,                   /* Size of regions */
  int bExtend,                    /* True to extend file if necessary */
  void volatile **pp              /* OUT: Mapped memory */
){


  unixFile *pDbFd = (unixFile*)fd;
  unixShm *p;
  unixShmNode *pShmNode;
  int rc = SQLITE_OK;
  int nShmPerMap = unixShmRegionPerMap();
  int nReqRegion;

................................................................................
      rc = SQLITE_IOERR_NOMEM;
      goto shmpage_out;
    }
    pShmNode->apRegion = apNew;
    while( pShmNode->nRegion<nReqRegion ){
      int nMap = szRegion*nShmPerMap;
      int i;
      void *pMem;
      if( pShmNode->h>=0 ){
        pMem = osMmap(0, nMap,
            pShmNode->isReadonly ? PROT_READ : PROT_READ|PROT_WRITE, 
            MAP_SHARED, pShmNode->h, szRegion*(i64)pShmNode->nRegion
        );

        if( pMem==MAP_FAILED ){
          rc = unixLogError(SQLITE_IOERR_SHMMAP, "mmap", pShmNode->zFilename);
          goto shmpage_out;
        }
      }else{
        pMem = sqlite3_malloc(szRegion);
        if( pMem==0 ){
................................................................................
      if( pX==p ) continue;
      assert( (pX->exclMask & (p->exclMask|p->sharedMask))==0 );
      allMask |= pX->sharedMask;
    }

    /* Unlock the system-level locks */
    if( (mask & allMask)==0 ){






      rc = unixShmSystemLock(pShmNode, F_UNLCK, ofst+UNIX_SHM_BASE, n);

    }else{
      rc = SQLITE_OK;
    }

    /* Undo the local locks */
    if( rc==SQLITE_OK ){
      p->exclMask &= ~mask;
................................................................................
    /* Find out which shared locks are already held by sibling connections.
    ** If any sibling already holds an exclusive lock, go ahead and return
    ** SQLITE_BUSY.
    */
    for(pX=pShmNode->pFirst; pX; pX=pX->pNext){
      if( (pX->exclMask & mask)!=0 ){
        rc = SQLITE_BUSY;





        break;
      }
      allShared |= pX->sharedMask;
    }

    /* Get shared locks at the system level, if necessary */
    if( rc==SQLITE_OK ){
      if( (allShared & mask)==0 ){






        rc = unixShmSystemLock(pShmNode, F_RDLCK, ofst+UNIX_SHM_BASE, n);

      }else{
        rc = SQLITE_OK;
      }
    }

    /* Get the local shared locks */
    if( rc==SQLITE_OK ){
................................................................................
  }else{
    /* Make sure no sibling connections hold locks that will block this
    ** lock.  If any do, return SQLITE_BUSY right away.
    */
    for(pX=pShmNode->pFirst; pX; pX=pX->pNext){
      if( (pX->exclMask & mask)!=0 || (pX->sharedMask & mask)!=0 ){
        rc = SQLITE_BUSY;





        break;
      }
    }
  
    /* Get the exclusive locks at the system level.  Then if successful
    ** also mark the local connection as being locked.
    */
    if( rc==SQLITE_OK ){





      rc = unixShmSystemLock(pShmNode, F_WRLCK, ofst+UNIX_SHM_BASE, n);
      if( rc==SQLITE_OK ){

        assert( (p->sharedMask & mask)==0 );
        p->exclMask |= mask;
      }
    }
  }
  sqlite3_mutex_leave(pShmNode->mutex);
  OSTRACE(("SHM-LOCK shmid-%d, pid-%d got %03x,%03x\n",
................................................................................
** All loads and stores begun before the barrier must complete before
** any load or store begun after the barrier.
*/
static void unixShmBarrier(
  sqlite3_file *fd                /* Database file holding the shared memory */
){
  UNUSED_PARAMETER(fd);



  unixEnterMutex();
  unixLeaveMutex();

}

/*
** Close a connection to shared-memory.  Delete the underlying 
** storage if deleteFlag is true.
**
** If there is no shared memory associated with the connection then this
................................................................................
#endif /* #ifndef SQLITE_OMIT_WAL */

#if (SQLITE_ENABLE_APPLE_SPI>0) && defined(__APPLE__)
static const char *unixTempFileDir(void);

static int unixInvalidateSupportFiles(unixFile *pFile, int skipWAL) {
  char jPath[MAXPATHLEN+9];
  int zLen = strlcpy(jPath, pFile->zPath, MAXPATHLEN+9);
  if( zLen<MAXPATHLEN ){
    size_t jLen;
    const char extensions[3][9] = { "-wal", "-journal", "-shm" };
    int j = (skipWAL ? 1 : 0);
    for( ; j<3; j++ ){

      
      /* Check to see if the shm file is already opened for this pFile */
      if( j==2 ){


        unixEnterMutex(); /* Because pFile->pInode is shared across threads */
        unixShmNode *pShmNode = pFile->pInode->pShmNode;
        if( pShmNode && !pShmNode->isReadonly ){
          struct stat sStat;
          sqlite3_mutex_enter(pShmNode->mutex);
          
          if( pShmNode->h>=0 && !osFstat(pShmNode->h, &sStat) ){
................................................................................
          sqlite3_mutex_leave(pShmNode->mutex);
        }
        unixLeaveMutex();
      }
      jLen = strlcpy(&jPath[zLen], extensions[j], 9);
      if( jLen < 9 ){
        int jflags = (j<2) ? O_TRUNC : O_RDWR;
        int jfd = open(jPath, jflags);
        if( jfd==(-1) ){
          if( errno!=ENOENT ){
            perror(jPath);
          }
        } else {
          if( j==2 ){
            struct stat sStat;
            if( !osFstat(jfd, &sStat) ){
              unsigned long size = (sStat.st_size<4) ? sStat.st_size : 4;
              if( size>0 ){
                uint32_t zero = 0;

                pwrite(jfd, &zero, (size_t)size, 0);
              }
            }
          }
          fsync(jfd);
          close(jfd);
        }
      }
    }
  }
  return SQLITE_OK;
}

................................................................................
    result = errno;
  }
  if (result) {
    rc = SQLITE_IOERR;
    storeLastErrno(pFile, result);
  }
  
  int fd2 = open(journalPath, O_RDWR);
  int result2 = 0;
  if (fd2 < 0) {
    if (errno != ENOENT) {
      result2 = errno;
    } else {
      result2 = 0;
    }
................................................................................
    }
  }
  if (result2 && !result) {
    rc = SQLITE_IOERR;
    storeLastErrno(pFile, result2);
  }
  
  int fd3 = open(walPath, O_RDWR);
  int result3 = 0;
  if (fd3 < 0) {
    if (errno != ENOENT) {
      result3 = errno;
    } else {
      result3 = 0;
    }
................................................................................
  if (result3 && !(result || result2)) {
    rc = SQLITE_IOERR;
    storeLastErrno(pFile, result2);
  }
  
  if (fd3 >= 0) {
    fsync(fd3);
    close(fd3);
  }
  if (fd2 >= 0) {
    fsync(fd2);
    close(fd2);
  }
  fsync(fd1);


	
  return rc;
}

static int unixTruncateDatabase(unixFile *pFile, int bFlags) {
  sqlite3_file *id = (sqlite3_file *)pFile;
  int rc = SQLITE_OK;
  void *pLock = NULL;
  int flags = 0;
  int corruptFileLock = 0;
  int isCorrupt = 0;

  int force = (bFlags & SQLITE_TRUNCATE_FORCE);
  int safeFailed = 0;

#if SQLITE_ENABLE_DATA_PROTECTION
  flags |= pFile->protFlags;
#endif
#if SQLITE_ENABLE_LOCKING_STYLE
  if( isProxyLockingMode(pFile) ){
    flags |= SQLITE_OPEN_AUTOPROXY;
  }
#endif
  














  rc = sqlite3demo_superlock(pFile->zPath, 0, flags, 0, 0, &pLock);
  if( rc ){
    if( rc==SQLITE_CORRUPT || rc==SQLITE_NOTADB ){
      isCorrupt = 1;
      rc = sqlite3demo_superlock_corrupt(id, SQLITE_LOCK_EXCLUSIVE,
                                         &corruptFileLock);
    }
    if( rc && !force ){
      return rc;
    }



    rc = SQLITE_OK; /* Ignore the locking failure if force is true */


  }

  if( (bFlags&SQLITE_TRUNCATE_INITIALIZE_HEADER_MASK)!=0 ){
    /* initialize a new database in TMPDIR and copy the contents over */
    const char *tDir = unixTempFileDir();
    int tDirLen = strlen(tDir);
    int tLen = sizeof(char) * (tDirLen + 12);
    char *tDbPath = (char *)malloc(tLen);
    int tFd = -1;
    
    strlcpy(tDbPath, tDir, tLen);

    if( tDbPath[(tDirLen-1)] != '/' ){
      strlcat(tDbPath, "/tmpdbXXXXX", tLen);
    } else {
      strlcat(tDbPath, "tmpdbXXXXX", tLen);
    }

    tFd = mkstemp(tDbPath);
    if( tFd==-1 ){
      storeLastErrno(pFile, errno);
      rc = SQLITE_IOERR;
      safeFailed = 1;
    }else{
      sqlite3 *tDb = NULL;
................................................................................
      }
      if( tDb ){
        int off = 0;
        /* merge the wal into the db */
        sqlite3_file_control(tDb, NULL, SQLITE_FCNTL_PERSIST_WAL, &off);
        sqlite3_close(tDb);
      }

      s = copyfile_state_alloc();
      lseek(tFd, 0, SEEK_SET);
      lseek(pFile->h, 0, SEEK_SET);
      if( fcopyfile(tFd, pFile->h, s, COPYFILE_DATA) ){
        int err=errno;
        switch(err) {
          case ENOMEM:
            trc = SQLITE_NOMEM;
            break;
          default:
            storeLastErrno(pFile, err);
            trc = SQLITE_IOERR;
        }
      }
      copyfile_state_free(s);
      fsync(pFile->h);

      close(tFd);
      unlink(tDbPath);
      if( trc!=SQLITE_OK ){
        safeFailed = 1;
        rc = trc;
      }
    }

    free(tDbPath);

  } else {
    rc = pFile->pMethod->xTruncate(id, 
           ((pFile->fsFlags & SQLITE_FSFLAGS_IS_MSDOS) != 0) ? 1L : 0L);
    if( rc ){
      safeFailed = 1;
    }
  }
................................................................................
    assert(force);
  }
  
  if( force && safeFailed){
    rc = unixUnsafeTruncateDatabase(pFile);
  }
  











  return rc;
}

/*
 ** Lock locations for shared-memory locks used by WAL mode.
 */
#ifndef SHM_BASE
................................................................................
*/
static int unixLockstatePid(unixFile *pFile, pid_t pid, int *pLockstate){
  int hDb;        /* File descriptor for the open database file */
  int hShm = -1;  /* File descriptor for WAL shared-memory file */
  ssize_t got;    /* Bytes read from header */
  int isWal = 0;             /* True if in WAL mode */
  int nLock = 0;             /* Number of locks held */

  int noHdr = 0;             /* Zero byte DB has no header */
  unsigned char aHdr[100];   /* Database header */
  
  assert(pLockstate);
  
  /* make sure we are dealing with a database file */
  hDb = pFile->h;
  if( hDb<0 ){
    *pLockstate = SQLITE_LOCKSTATE_ERROR;
    return SQLITE_ERROR;
  }











  assert( (strlen(SQLITE_FILE_HEADER)+1)==SQLITE_FILE_HEADER_LEN );
  got = pread(hDb, aHdr, 100, 0);
  if( got<0 ){
    *pLockstate = SQLITE_LOCKSTATE_ERROR;
    return SQLITE_ERROR;
  }
  if( got==0 ){
................................................................................
  }else if( got!=100
         || memcmp(aHdr, SQLITE_FILE_HEADER, SQLITE_FILE_HEADER_LEN)!=0
  ){
    *pLockstate = SQLITE_LOCKSTATE_NOTADB;
    return SQLITE_NOTADB;
  }
  
  /* First check for an exclusive lock */
  nLock += unixIsLocked(pid, hDb, F_RDLCK, SHARED_FIRST, SHARED_SIZE,
                        "EXCLUSIVE");
  if (!noHdr) {
    isWal = aHdr[18]==2;
  }
  if( nLock==0 && isWal==0 ){
    /* Rollback mode */
    nLock += unixIsLocked(pid, hDb, F_WRLCK, PENDING_BYTE, SHARED_SIZE+2,
                          "PENDING|RESERVED|SHARED");
  }
  if( nLock==0 && isWal!=0 ){
    /* lookup the file descriptor for the shared memory file if we have it open
    ** in this process */
    unixEnterMutex(); /* Because pFile->pInode is shared across threads */
    unixShmNode *pShmNode = pFile->pInode->pShmNode;
    if( pShmNode ){
................................................................................
      /* the shared memory file isn't open in this process space, open our
      ** own FD */
      char zShm[MAXPATHLEN];
      
      /* WAL mode */
      strlcpy(zShm, pFile->zPath, MAXPATHLEN);
      strlcat(zShm, "-shm", MAXPATHLEN);
      hShm = open(zShm, O_RDONLY, 0);
      if( hShm<0 ){
        *pLockstate = SQLITE_LOCKSTATE_OFF;
        unixLeaveMutex();
        return SQLITE_OK;
      }
      if( unixIsLocked(pid, hShm, F_RDLCK, SHM_RECOVER, 1, "WAL-RECOVERY") ||
         unixIsLocked(pid, hShm, F_RDLCK, SHM_WRITE, 1, "WAL-WRITE") ){
        nLock = 1;
      }
      close(hShm);
    }
    unixLeaveMutex();
  }
  if( nLock>0 ){
    *pLockstate = SQLITE_LOCKSTATE_ON;
  } else {
    *pLockstate = SQLITE_LOCKSTATE_OFF;
................................................................................
     0,
     0,
     "/var/tmp",
     "/usr/tmp",
     "/tmp",
     0        /* List terminator */
  };

  unsigned int i;
  struct stat buf;
  const char *zDir = 0;

  azDirs[0] = sqlite3_temp_directory;
  if( !azDirs[1] ) azDirs[1] = getenv("SQLITE_TMPDIR");













  if( !azDirs[2] ) azDirs[2] = getenv("TMPDIR");


  for(i=0; i<sizeof(azDirs)/sizeof(azDirs[0]); zDir=azDirs[i++]){
    if( zDir==0 ) continue;
    if( osStat(zDir, &buf) ) continue;
    if( !S_ISDIR(buf.st_mode) ) continue;
    if( osAccess(zDir, 07) ) continue;
    break;
  }





  return zDir;
}

/*
** Create a temporary file name in zBuf.  zBuf must be allocated
** by the calling process and must be big enough to hold at least
** pVfs->mxPathname bytes.
................................................................................
    }
  }else if( flags & SQLITE_OPEN_DELETEONCLOSE ){
    *pMode = 0600;
  }
  return rc;
}













































































































/*
** Open the file zPath.
** 
** Previously, the SQLite OS layer used three functions in place of this
** one:
**
**     sqlite3OsOpenReadWrite();
................................................................................
  int eType = flags&0xFF0FFF00;  /* Type of file to open */
#else
  int eType = flags&0xFFFFFF00;  /* Type of file to open */
#endif
  int noLock;                    /* True to omit locking primitives */
  int rc = SQLITE_OK;            /* Function Return Code */
  int ctrlFlags = 0;             /* UNIXFILE_* flags */


  int isExclusive  = (flags & SQLITE_OPEN_EXCLUSIVE);
  int isDelete     = (flags & SQLITE_OPEN_DELETEONCLOSE);
  int isCreate     = (flags & SQLITE_OPEN_CREATE);
  int isReadonly   = (flags & SQLITE_OPEN_READONLY);
  int isReadWrite  = (flags & SQLITE_OPEN_READWRITE);
#if SQLITE_ENABLE_LOCKING_STYLE
  int isAutoProxy  = (flags & SQLITE_OPEN_AUTOPROXY);
#endif
#if defined(__APPLE__) || SQLITE_ENABLE_LOCKING_STYLE
  struct statfs fsInfo;
#endif



  /* If creating a master or main-file journal, this function will open
  ** a file-descriptor on the directory too. The first time unixSync()
  ** is called the directory file descriptor will be fsync()ed and close()d.
  */
  int syncDir = (isCreate && (
        eType==SQLITE_OPEN_MASTER_JOURNAL 
     || eType==SQLITE_OPEN_MAIN_JOURNAL 
................................................................................
  if( isReadWrite ) openFlags |= O_RDWR;
  if( isCreate )    openFlags |= O_CREAT;
  if( isExclusive ) openFlags |= (O_EXCL|O_NOFOLLOW);
  openFlags |= (O_LARGEFILE|O_BINARY);

#if SQLITE_ENABLE_DATA_PROTECTION
  p->protFlags = (flags & SQLITE_OPEN_FILEPROTECTION_MASK);

#endif
    
  if( fd<0 ){
    mode_t openMode;              /* Permissions to create file with */
    uid_t uid;                    /* Userid for the file */
    gid_t gid;                    /* Groupid for the file */
    rc = findCreateFileMode(zName, flags, &openMode, &uid, &gid);
    if( rc!=SQLITE_OK ){
      assert( !p->pUnused );
      assert( eType==SQLITE_OPEN_WAL || eType==SQLITE_OPEN_MAIN_JOURNAL );
      return rc;
    }
    fd = robust_open(zName, openFlags, openMode);
    OSTRACE(("OPENX   %-3d %s 0%o\n", fd, zName, openFlags));
    if( fd<0 && errno!=EISDIR && isReadWrite && !isExclusive ){
      /* Failed to open the file for read/write access. Try read-only. */
      flags &= ~(SQLITE_OPEN_READWRITE|SQLITE_OPEN_CREATE);
      openFlags &= ~(O_RDWR|O_CREAT);
      flags |= SQLITE_OPEN_READONLY;
      openFlags |= O_RDONLY;
      isReadonly = 1;
      fd = robust_open(zName, openFlags, openMode);
    }
    if( fd<0 ){





      rc = unixLogError(SQLITE_CANTOPEN_BKPT, "open", zName);




      goto open_finished;
    }

    /* if we're opening the wal or journal and running as root, set the
    ** journal uid/gid */
    if( !isReadonly && (flags & (SQLITE_OPEN_WAL|SQLITE_OPEN_MAIN_JOURNAL)) ){
      uid_t euid = geteuid();
................................................................................
        if( osFchown(fd, uid, gid) ){
          rc = SQLITE_CANTOPEN_BKPT;
          goto open_finished;
        }
      }
    }
  }












  assert( fd>=0 );
  if( pOutFlags ){
    *pOutFlags = flags;
  }

  if( p->pUnused ){
    p->pUnused->fd = fd;
................................................................................
  }
  if (0 == strncmp("msdos", fsInfo.f_fstypename, 5)) {
    ((unixFile*)pFile)->fsFlags |= SQLITE_FSFLAGS_IS_MSDOS;
  }
  if (0 == strncmp("exfat", fsInfo.f_fstypename, 5)) {
    ((unixFile*)pFile)->fsFlags |= SQLITE_FSFLAGS_IS_MSDOS;
  }













#endif

  /* Set up appropriate ctrlFlags */
  if( isDelete )                ctrlFlags |= UNIXFILE_DELETE;
  if( isReadonly )              ctrlFlags |= UNIXFILE_RDONLY;
  if( noLock )                  ctrlFlags |= UNIXFILE_NOLOCK;
  if( syncDir )                 ctrlFlags |= UNIXFILE_DIRSYNC;
................................................................................
    int useProxy = 0;

    /* SQLITE_FORCE_PROXY_LOCKING==1 means force always use proxy, 0 means 
    ** never use proxy, NULL means use proxy for non-local files only.  */
    if( envforce!=NULL ){
      useProxy = atoi(envforce)>0;
    }else{
      useProxy = !(fsInfo.f_flags&MNT_LOCAL);
    }
    if( useProxy ){
      rc = fillInUnixFile(pVfs, fd, pFile, zPath, ctrlFlags);
      if( rc==SQLITE_OK ){
        /* cache the pMethod in case the transform fails */
        const struct sqlite3_io_methods *pMethod = pFile->pMethods;
        rc = proxyTransformUnixFile((unixFile*)pFile, ":auto:");
................................................................................
#else
      if( fsync(fd) )
#endif
      {
        rc = unixLogError(SQLITE_IOERR_DIR_FSYNC, "fsync", zPath);
      }
#if OSCLOSE_CHECK_CLOSE_IOERR
      if( close(fd)&&!rc ){
        rc = SQLITE_IOERR_DIR_CLOSE;
      }
#else
      robust_close(0, fd, __LINE__);
#endif
    }else if( rc==SQLITE_CANTOPEN ){
      rc = SQLITE_OK;
................................................................................


#ifndef SQLITE_OMIT_LOAD_EXTENSION
/*
** Interfaces for opening a shared library, finding entry points
** within the shared library, and closing the shared library.
*/
#include <dlfcn.h>
static void *unixDlOpen(sqlite3_vfs *NotUsed, const char *zFilename){
  UNUSED_PARAMETER(NotUsed);
  return dlopen(zFilename, RTLD_NOW | RTLD_GLOBAL);
}

/*
** SQLite calls this function immediately after a call to unixDlSym() or
................................................................................
  ** tests repeatable.
  */
  memset(zBuf, 0, nBuf);
  randomnessPid = getpid();  
#if !defined(SQLITE_TEST)
  {
    int fd, got;
    fd = robust_open("/dev/urandom", O_RDONLY, 0);
    if( fd<0 ){
      time_t t;
      time(&t);
      memcpy(zBuf, &t, sizeof(t));
      memcpy(&zBuf[sizeof(t)], &randomnessPid, sizeof(randomnessPid));
      assert( sizeof(t)+sizeof(randomnessPid)<=(size_t)nBuf );
      nBuf = sizeof(t) + sizeof(randomnessPid);
    }else{
      do{ got = osRead(fd, zBuf, nBuf); }while( got<0 && errno==EINTR );
      robust_close(0, fd, __LINE__);
    }
  }
#endif
  return nBuf;
}

................................................................................
};

/* 
** The proxy lock file path for the database at dbPath is written into lPath, 
** which must point to valid, writable memory large enough for a maxLen length
** file path. 
*/
static int proxyGetLockPath(const char *dbPath, char *lPath, size_t maxLen){
  int len;
  int dbLen;
  int i;



#ifdef LOCKPROXYDIR
  len = strlcpy(lPath, LOCKPROXYDIR, maxLen);
#else
# ifdef _CS_DARWIN_USER_TEMP_DIR
  {
    if( !confstr(_CS_DARWIN_USER_TEMP_DIR, lPath, maxLen) ){
      OSTRACE(("GETLOCKPATH  failed %s errno=%d pid=%d\n",
               lPath, errno, getpid()));
      return SQLITE_IOERR_LOCK;
    }
    len = strlcat(lPath, "sqliteplocks", maxLen);    
  }
# else
  len = strlcpy(lPath, "/tmp/", maxLen);
# endif
#endif

  if( lPath[len-1]!='/' ){
    len = strlcat(lPath, "/", maxLen);
  }
  

  /* transform the db path to a unique cache name */





  dbLen = (int)strlen(dbPath);














































  for( i=0; i<dbLen && (i+len+7)<(int)maxLen; i++){
    char c = dbPath[i];







    lPath[i+len] = (c=='/')?'_':c;

  }
  lPath[i+len]='\0';



  strlcat(lPath, ":auto:", maxLen);
  OSTRACE(("GETLOCKPATH  proxy lock path=%s pid=%d\n", lPath, getpid()));
  return SQLITE_OK;
}

/* 
 ** Creates the lock file and any missing directories in lockPath
 */
static int proxyCreateLockPath(const char *lockPath){
................................................................................
  proxyLockingContext *pCtx;
  unixFile *pLockFile;
  
  assert(pFile!=NULL && pFile->lockingContext!=NULL);
  assert(pFile->pMethod == &proxyIoMethods);
  pCtx = ((proxyLockingContext *)(pFile->lockingContext));
  pLockFile = pCtx->lockProxy;


  if( pLockFile->pMethod->iVersion>=2 && pLockFile->pMethod->xShmMap!=0 ){
    return pCtx->lockProxyPath;
  }


  return NULL;
}
#endif

/*
** Create a new VFS file descriptor (stored in memory obtained from
** sqlite3_malloc) and open the file named "path" in the file descriptor.
................................................................................
    unixFile **ppFile,       /* unixFile created and returned by ref */
    int islockfile           /* if non zero missing dirs will be created */
) {
  int fd = -1;
  unixFile *pNew;
  int rc = SQLITE_OK;
  int openFlags = O_RDWR | O_CREAT;

  sqlite3_vfs dummyVfs;
  int terrno = 0;
  UnixUnusedFd *pUnused = NULL;

  /* 1. first try to open/create the file
  ** 2. if that fails, and this is a lock file (not-conch), try creating
  ** the parent directories and then try again.
  ** 3. if that fails, try to open the file read-only
  ** otherwise return BUSY (if lock file) or CANTOPEN for the conch file
  */
  pUnused = findReusableFd(path, openFlags);
  if( pUnused ){
    fd = pUnused->fd;
  }else{
    pUnused = sqlite3_malloc(sizeof(*pUnused));
    if( !pUnused ){
      return SQLITE_NOMEM;
    }
  }
  if( fd<0 ){
    fd = robust_open(path, openFlags, 0);
    terrno = errno;
    if( fd<0 && errno==ENOENT && islockfile ){
      if( proxyCreateLockPath(path) == SQLITE_OK ){
        fd = robust_open(path, openFlags, 0);
      }
    }
  }
  if( fd<0 ){
    openFlags = O_RDONLY;

    fd = robust_open(path, openFlags, 0);
    terrno = errno;
  }
  if( fd<0 ){
    sqlite3_free(pUnused);
    if( islockfile ){
      return SQLITE_BUSY;
    }
................................................................................
  }
  memset(pNew, 0, sizeof(unixFile));
  pNew->openFlags = openFlags;
  memset(&dummyVfs, 0, sizeof(dummyVfs));
  dummyVfs.pAppData = (void*)&autolockIoFinder;
  dummyVfs.zName = "dummy";
  pUnused->fd = fd;
  pUnused->flags = openFlags;
  pNew->pUnused = pUnused;
  
  rc = fillInUnixFile(&dummyVfs, fd, (sqlite3_file*)pNew, path, 0);
  if( rc==SQLITE_OK ){
    *ppFile = pNew;
    return SQLITE_OK;
  }
................................................................................
#ifdef SQLITE_TEST
/* simulate multiple hosts by creating unique hostid file paths */
int sqlite3_hostid_num = 0;
#endif

#define PROXY_HOSTIDLEN    16  /* conch file host id length */


/* Not always defined in the headers as it ought to be */
extern int gethostuuid(uuid_t id, const struct timespec *wait);


/* get the host ID via gethostuuid(), pHostID must point to PROXY_HOSTIDLEN 
** bytes of writable memory.
*/
static int proxyGetHostID(unsigned char *pHostID, int *pError){
  assert(PROXY_HOSTIDLEN == sizeof(uuid_t));
  memset(pHostID, 0, PROXY_HOSTIDLEN);
#if HAVE_GETHOSTUUID
................................................................................
  /* read the conch content */
  readLen = osPread(conchFile->h, buf, PROXY_MAXCONCHLEN, 0);
  if( readLen<PROXY_PATHINDEX ){
    sqlite3_snprintf(sizeof(errmsg),errmsg,"read error (len %d)",(int)readLen);
    goto end_breaklock;
  }
  /* write it out to the temporary break file */
  fd = robust_open(tPath, (O_RDWR|O_CREAT|O_EXCL), 0);
  if( fd<0 ){
    sqlite3_snprintf(sizeof(errmsg), errmsg, "create failed (%d)", errno);
    goto end_breaklock;
  }
  if( osPwrite(fd, buf, readLen, 0) != (ssize_t)readLen ){
    sqlite3_snprintf(sizeof(errmsg), errmsg, "write failed (%d)", errno);
    goto end_breaklock;
................................................................................
      if( conchModTime.tv_sec != buf.st_mtimespec.tv_sec || 
         conchModTime.tv_nsec != buf.st_mtimespec.tv_nsec ){
        return SQLITE_BUSY;
      }
      
      if( pCtx->nFails==2 ){  
        char tBuf[PROXY_MAXCONCHLEN];
        int len = osPread(conchFile->h, tBuf, PROXY_MAXCONCHLEN, 0);
        if( len<0 ){
          storeLastErrno(pFile, errno);
          return SQLITE_IOERR_LOCK;
        }
        if( len>PROXY_PATHINDEX && tBuf[0]==(char)PROXY_CONCHVERSION){
          /* don't break the lock if the host id doesn't match, but do log
           * an error to console so users can diagnose stale NFS locks more 
................................................................................
      ** stick.
      */
      futimes(conchFile->h, NULL);
      if( hostIdMatch && !createConch ){
        if( conchFile->pInode && conchFile->pInode->nShared>1 ){
          /* We are trying for an exclusive lock but another thread in this
           ** same process is still holding a shared lock. */





          rc = SQLITE_BUSY;
        } else {          
          rc = proxyConchLock(pFile, myHostID, EXCLUSIVE_LOCK);
        }
      }else{
        rc = proxyConchLock(pFile, myHostID, EXCLUSIVE_LOCK);
      }
................................................................................
        memcpy(&writeBuffer[PROXY_HEADERLEN], myHostID, PROXY_HOSTIDLEN);
        if( pCtx->lockProxyPath!=NULL ){
          strlcpy(&writeBuffer[PROXY_PATHINDEX], pCtx->lockProxyPath,
                  MAXPATHLEN);
        }else{
          strlcpy(&writeBuffer[PROXY_PATHINDEX], tempLockPath, MAXPATHLEN);
        }
        writeSize = PROXY_PATHINDEX + strlen(&writeBuffer[PROXY_PATHINDEX]);
        robust_ftruncate(conchFile->h, writeSize);
        rc = unixWrite((sqlite3_file *)conchFile, writeBuffer, writeSize, 0);
        fsync(conchFile->h);
        /* If we created a new conch file (not just updated the contents of a 
         ** valid conch file), try to match the permissions of the database 
         */
        if( rc==SQLITE_OK && createConch ){
................................................................................
      
    end_takeconch:
      OSTRACE(("TRANSPROXY: CLOSE  %d\n", pFile->h));
      if( rc==SQLITE_OK && pFile->openFlags ){
        int fd;
        if( pFile->h>=0 ){
#if defined(STRICT_CLOSE_ERROR) && OSCLOSE_CHECK_CLOSE_IOERR
          if( close(pFile->h) ){
            storeLastErrno(pFile, errno);
            return SQLITE_IOERR_CLOSE;
          }
#else
          robust_close(pFile, pFile->h, __LINE__);
#endif
        }
        pFile->h = -1;
        fd = robust_open(pCtx->dbPath, pFile->openFlags, 0);
        OSTRACE(("TRANSPROXY: OPEN  %d\n", fd));
        if( fd>=0 ){
          pFile->h = fd;
        }else{
          rc=SQLITE_CANTOPEN_BKPT; /* SQLITE_BUSY? proxyTakeConch called
           during locking */
        }
................................................................................
*/
static int switchLockProxyPath(unixFile *pFile, const char *path) {
  proxyLockingContext *pCtx = (proxyLockingContext*)pFile->lockingContext;
  char *oldPath = pCtx->lockProxyPath;
  int rc = SQLITE_OK;

  if( pFile->eFileLock!=NO_LOCK ){





    return SQLITE_BUSY;
  }  

  /* nothing to do if the path is NULL, :auto: or matches the existing path */
  if( !path || path[0]=='\0' || !strcmp(path, ":auto:") ||
    (oldPath && !strncmp(oldPath, path, MAXPATHLEN)) ){
    return SQLITE_OK;
................................................................................
    strlcpy(dbPath, ((afpLockingContext *)pFile->lockingContext)->dbPath,
            MAXPATHLEN);
  } else
#endif
  if( pFile->pMethod == &dotlockIoMethods ){
    /* dot lock style uses the locking context to store the dot lock
    ** file path */
    int len = strlen((char *)pFile->lockingContext) - strlen(DOTLOCK_SUFFIX);
    memcpy(dbPath, (char *)pFile->lockingContext, len + 1);
  }else{
    /* all other styles use the locking context to store the db file path */
    assert( strlen((char*)pFile->lockingContext)<=MAXPATHLEN );
    strlcpy(dbPath, (char *)pFile->lockingContext, MAXPATHLEN);
  }
  return SQLITE_OK;
................................................................................
static int proxyTransformUnixFile(unixFile *pFile, const char *path) {
  proxyLockingContext *pCtx;
  char dbPath[MAXPATHLEN+1];       /* Name of the database file */
  char *lockPath=NULL;
  int rc = SQLITE_OK;
  
  if( pFile->eFileLock!=NO_LOCK ){





    return SQLITE_BUSY;
  }
  getDbPathForUnixFile(pFile, dbPath);
  if( !path || path[0]=='\0' || !strcmp(path, ":auto:") ){
    lockPath=NULL;
  }else{
    lockPath=(char *)path;







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....
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....
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....
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....
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....
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....
4006
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....
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....
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....
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....
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4881
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....
4885
4886
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4888
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4892
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....
4903
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4910
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5191
5192
....
5194
5195
5196
5197
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5201
5202
5203
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5205
5206
5207
5208
5209
5210
5211
5212
5213
5214
5215
5216
5217
5218
5219
5220
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**   *  Definitions of sqlite3_vfs objects for all locking methods
**      plus implementations of sqlite3_os_init() and sqlite3_os_end().
*/
#include "sqliteInt.h"
#if SQLITE_OS_UNIX              /* This file is used on unix only */

#include "btreeInt.h"           /* Use by Apple extensions only */
#include <AvailabilityMacros.h>


/*
** There are various methods for file locking used for concurrency
** control:
**
**   1. POSIX locking (the default),
................................................................................
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <time.h>
#include <sys/time.h>
#include <sys/syslimits.h>
#include <errno.h>
#if !defined(SQLITE_OMIT_WAL) || SQLITE_MAX_MMAP_SIZE>0
#include <sys/mman.h>
#endif


#if SQLITE_ENABLE_LOCKING_STYLE
# include <sys/ioctl.h>
# include <uuid/uuid.h>
# if defined(__APPLE__) && ((__MAC_OS_X_VERSION_MIN_REQUIRED > 1050) || \
                            (__IPHONE_OS_VERSION_MIN_REQUIRED > 2000))
#if (!defined(TARGET_OS_EMBEDDED)||(TARGET_OS_EMBEDDED==0))&&(!defined(TARGET_IPHONE_SIMULATOR)||(TARGET_IPHONE_SIMULATOR==0))
#  define HAVE_GETHOSTUUID 1
#warning "gethostuuid() is enabled."
#else
#warning "gethostuuid() is disabled."
#endif
# endif
# if OS_VXWORKS
#  include <semaphore.h>
#  include <limits.h>
# else
#  include <sys/file.h>
#  include <sys/param.h>
# endif
#endif /* SQLITE_ENABLE_LOCKING_STYLE */

#if defined(__APPLE__) || (SQLITE_ENABLE_LOCKING_STYLE && !OS_VXWORKS)
# include <sys/mount.h>
#endif
#if defined(__APPLE__) && defined(SQLITE_ENABLE_LOCKING_STYLE)
# include <CommonCrypto/CommonDigest.h>
#endif

#ifdef HAVE_UTIME
# include <utime.h>
#endif

#if defined(__APPLE__)
#include <mach/mach.h>
#include <mach/mach_vm.h>
#include <pwd.h>
#endif

/*
** Allowed values of unixFile.fsFlags
*/
#define SQLITE_FSFLAGS_IS_MSDOS     0x1
#define SQLITE_FSFLAGS_IS_MMAP_SAFE 0x2

/*
** If we are to be thread-safe, include the pthreads header and define
** the SQLITE_UNIX_THREADS macro.
*/
#if SQLITE_THREADSAFE
# include <pthread.h>
# define SQLITE_UNIX_THREADS 1
#endif

/*
 ** Operator used with sqlite3_file_control to set the timeout for the next call
 ** to lock the database file via fcntl with F_SETLKWTIMEOUT.  The timeout should
 ** be passed as a pointer to a long representing the timeout in milliseconds
 */
#ifndef SQLITE_FCNTL_SET_NEXTFLOCKTIMEOUT
#define SQLITE_FCNTL_SET_NEXTFLOCKTIMEOUT      104
#define SQLITE_FCNTL_GET_NEXTFLOCKTIMEOUT      105
#endif

#if defined(__APPLE__)
#include <asl.h>
#include <libkern/OSAtomic.h>
static aslclient errorlog_client = NULL;

static void _close_error_asl_log() {
  if( NULL!=errorlog_client ){
    asl_close(errorlog_client);
    errorlog_client = NULL;
  }
}
static void _open_error_asl_log() {
  OSMemoryBarrier();
  if( NULL==errorlog_client ){
    aslclient aclient = asl_open(NULL, NULL, ASL_OPT_STDERR);
    
    if (OSAtomicCompareAndSwapPtrBarrier(NULL, (void*)aclient, (void* volatile*)&errorlog_client)) {
      atexit(_close_error_asl_log);
    } else {
      asl_close(aclient);
    }    
  }
}

#endif

#if defined(USE_GUARDED_FD)&&defined(__APPLE__)
# include <dispatch/dispatch.h>
# include <dlfcn.h>

/* taken from <sys/guarded.h> */
# ifndef _GUARDID_T
typedef __uint64_t guardid_t;
#  define GUARD_CLOSE             (1u << 0)
#  define GUARD_DUP               (1u << 1)
#  define GUARD_SOCKET_IPC        (1u << 2)
#  define GUARD_FILEPORT          (1u << 3)
# endif /* _GUARDID_T */

#ifndef GUARD_WRITE
#define GUARD_WRITE		(1u << 4)
#endif

#ifndef GUARD_MMAP
#define GUARD_MMAP		(1u << 5)
#endif

#ifndef PROTECTION_CLASS_A
#define PROTECTION_CLASS_A 1
#define PROTECTION_CLASS_B 2
#define PROTECTION_CLASS_C 3
#define PROTECTION_CLASS_D 4
#endif

#ifndef PROTECTION_CLASS_SYSTEM_DEFAULT
#define PROTECTION_CLASS_SYSTEM_DEFAULT 0
#endif

static int unixProtectionClassForVFSProtectionFlags(int protFlags) {
  protFlags &= SQLITE_OPEN_FILEPROTECTION_MASK;
  
  switch (protFlags) {
    case SQLITE_OPEN_FILEPROTECTION_COMPLETE:
      return PROTECTION_CLASS_A;
    case SQLITE_OPEN_FILEPROTECTION_COMPLETEUNLESSOPEN:
      return PROTECTION_CLASS_B;
    case SQLITE_OPEN_FILEPROTECTION_COMPLETEUNTILFIRSTUSERAUTHENTICATION:
      return PROTECTION_CLASS_C;
    case SQLITE_OPEN_FILEPROTECTION_NONE:
      return PROTECTION_CLASS_D;
    default:
    return PROTECTION_CLASS_SYSTEM_DEFAULT;
  }
}

static int shmUnixProtectionClassForVFSProtectionFlags(int protFlags) {
  protFlags &= SQLITE_OPEN_FILEPROTECTION_MASK;
  
  switch (protFlags) {
    case SQLITE_OPEN_FILEPROTECTION_COMPLETE:
      return PROTECTION_CLASS_C;
    case SQLITE_OPEN_FILEPROTECTION_COMPLETEUNLESSOPEN:
      return PROTECTION_CLASS_C;
    case SQLITE_OPEN_FILEPROTECTION_COMPLETEUNTILFIRSTUSERAUTHENTICATION:
      return PROTECTION_CLASS_C;
    case SQLITE_OPEN_FILEPROTECTION_NONE:
      return PROTECTION_CLASS_D;
    default:
      return PROTECTION_CLASS_D;
  }
}

static guardid_t guard = 0x8fd4dbfade2deadull;
static dispatch_once_t guard_once_token;

// extern user_ssize_t guarded_pwrite_np(int fd, const guardid_t *guard, user_addr_t buf, user_size_t nbyte, off_t offset);
// extern user_addr_t guarded_mmap_np(caddr_t addr, const guardid_t *guard, size_t len, int prot, int flags, int fd, off_t pos);
// extern user_ssize_t guarded_write_np(int fd, const guardid_t *guard, user_addr_t cbuf, user_size_t nbyte);


static int (*dl_guarded_open_dprotected_np)(const char *path, const guardid_t *guard, u_int guardflags, int flags, int dpclass, int dpflags, ...);

static int (*dl_guarded_open_np)(const char *path, const guardid_t *guard, u_int guardflags, int flags, ...);

static int (*dl_guarded_close_np)(int fd, const guardid_t *guard);

static int (*dl_guarded_pwrite_np)(int fd, const guardid_t *guard, user_addr_t buf, user_size_t nbyte, off_t offset);

static int (*dl_guarded_write_np)(int fd, const guardid_t *guard, user_addr_t cbuf, user_size_t nbyte);

static int (*dl_guarded_mmap_np)(caddr_t addr, const guardid_t *guard, size_t len, int prot, int flags, int fd, off_t pos);

#endif /* USE_GUARDED_FD */

#if defined(SQLITE_ENABLE_FLOCKTIMEOUT)&&(SQLITE_ENABLE_FLOCKTIMEOUT>0)
# if (defined(__APPLE__) && (!defined(TARGET_IPHONE_SIMULATOR)||(TARGET_IPHONE_SIMULATOR==0)) && ((TARGET_OS_EMBEDDED>0)||(MAC_OS_X_VERSION_10_9>0)))
#  define SQLITE_USE_FLOCKTIMEOUT 1
# endif
#endif /* SQLITE_ENABLE_FLOCKTIMEOUT */

/*
** Default permissions when creating a new file
*/
#ifndef SQLITE_DEFAULT_FILE_PERMISSIONS
# define SQLITE_DEFAULT_FILE_PERMISSIONS 0644
#endif

................................................................................
#ifndef SQLITE_DEFAULT_PROXYDIR_PERMISSIONS
# define SQLITE_DEFAULT_PROXYDIR_PERMISSIONS 0755
#endif

/*
** Maximum supported path-length.
*/
#define MAX_PATHNAME PATH_MAX

/*
** Only set the lastErrno if the error code is a real error and not 
** a normal expected return code of SQLITE_BUSY or SQLITE_OK
*/
#define IS_LOCK_ERROR(x)  ((x != SQLITE_OK) && (x != SQLITE_BUSY))

................................................................................
#endif
#if SQLITE_ENABLE_DATA_PROTECTION
  int protFlags;                      /* Data protection flags from unixOpen */
#endif
#if SQLITE_ENABLE_LOCKING_STYLE || defined(__APPLE__)
  unsigned fsFlags;                   /* cached details from statfs() */
#endif
#ifdef SQLITE_USE_FLOCKTIMEOUT
  int nextFlockTimeout;
#endif
#if OS_VXWORKS
  struct vxworksFileId *pId;          /* Unique file ID */
#endif
#ifdef SQLITE_DEBUG
  /* The next group of variables are used to track whether or not the
  ** transaction counter in bytes 24-27 of database files are updated
  ** whenever any part of the database changes.  An assertion fault will
................................................................................
#endif

#ifdef SQLITE_TEST
  /* In test mode, increase the size of this structure a bit so that 
  ** it is larger than the struct CrashFile defined in test6.c.
  */
  char aPadding[32];
#endif
#if defined(__APPLE__)
    /* <rdar://problem/17742712> */
    /* This variable is used to sanity check reads and writes against
    ** corrupt offsets or lengths. No reads or writes should ever exceed
    ** the total capacity of the volume.
    */
    i64 nFsBytes;
#endif
};

/* This variable holds the process id (pid) from when the xRandomness()
** method was called.  If xOpen() is called from a different process id,
** indicating that a fork() has occurred, the PRNG will be reset.
*/
................................................................................
** Different Unix systems declare open() in different ways.  Same use
** open(const char*,int,mode_t).  Others use open(const char*,int,...).
** The difference is important when using a pointer to the function.
**
** The safest way to deal with the problem is to always use this wrapper
** which always has the same well-defined interface.
*/
static int posixOpen(const char *zFile, int flags, int mode, int protectionFlags, int allowmmap){
#if defined(USE_GUARDED_FD)&&defined(__APPLE__)
  dispatch_once(&guard_once_token, ^{
    void *kernellib = (void *)dlopen("/usr/lib/libSystem.dylib", RTLD_GLOBAL);
    assert(kernellib);
    if (kernellib) {
#if SQLITE_ENABLE_DATA_PROTECTION
      dl_guarded_open_dprotected_np = dlsym(kernellib, "guarded_open_dprotected_np");
#else
      dl_guarded_open_dprotected_np = NULL;
#endif
      dl_guarded_open_np = dlsym(kernellib, "guarded_open_np");
      
      if (dl_guarded_open_dprotected_np || dl_guarded_open_np) {
        dl_guarded_close_np = dlsym(kernellib, "guarded_close_np");
        dl_guarded_pwrite_np = dlsym(kernellib, "guarded_pwrite_np");
        dl_guarded_write_np = dlsym(kernellib, "guarded_write_np");
        dl_guarded_mmap_np = NULL; // dlsym(kernellib, "guarded_mmap_np");
        
#if ((!defined(TARGET_IPHONE_SIMULATOR)||(TARGET_IPHONE_SIMULATOR==0)) && (!defined(__i386__)))
        char* isbandi = getenv("RC_XBS");
        if (isbandi && (strlen(isbandi) > 0)) {
          dl_guarded_pwrite_np = NULL;
          dl_guarded_write_np = NULL;
          dl_guarded_mmap_np = NULL;
        }
#else
        dl_guarded_open_dprotected_np = NULL;
        dl_guarded_pwrite_np = NULL;
        dl_guarded_write_np = NULL;
        dl_guarded_mmap_np = NULL;
#endif
        
#if defined(SQLITE_DEBUG) && !defined(SQLITE_TEST)
        _open_error_asl_log();
        if (dl_guarded_open_dprotected_np) {
          asl_log(errorlog_client, NULL, ASL_LEVEL_NOTICE, "SQLite: Found guarded_open_dprotected_np\n");
        } else if (dl_guarded_open_np) {
          asl_log(errorlog_client, NULL, ASL_LEVEL_NOTICE, "SQLite: Using guarded_open_np\n");
        }
        if (dl_guarded_pwrite_np) {
          asl_log(errorlog_client, NULL, ASL_LEVEL_NOTICE, "SQLite: Using guarded_pwrite_np\n");
        } else {
          asl_log(errorlog_client, NULL, ASL_LEVEL_WARNING, "SQLite: Failed to find guarded_pwrite_np!\n");
        }
        if (dl_guarded_write_np) {
          asl_log(errorlog_client, NULL, ASL_LEVEL_NOTICE, "SQLite: Using guarded_write_np\n");
          if (!dl_guarded_pwrite_np) {
            dl_guarded_write_np = NULL;
          }
        } else {
          asl_log(errorlog_client, NULL, ASL_LEVEL_WARNING, "SQLite: Failed to find guarded_write_np!\n");
          dl_guarded_pwrite_np = NULL;
        }

        if( dl_guarded_close_np==NULL|| (dl_guarded_open_np == NULL && dl_guarded_open_dprotected_np == NULL) ){
          _open_error_asl_log();
          asl_log(errorlog_client, NULL, ASL_LEVEL_ERR, "SQLite: Failed to find guarded open/close\n");
        }
#else
        if (dl_guarded_pwrite_np == NULL || dl_guarded_write_np == NULL) {
          dl_guarded_pwrite_np = NULL;
          dl_guarded_write_np = NULL;
        }
#endif
      }
    }
  });
  
  if(dl_guarded_open_np || dl_guarded_open_dprotected_np){
    int guardflags = GUARD_CLOSE | GUARD_DUP | GUARD_SOCKET_IPC | GUARD_FILEPORT;
    if (dl_guarded_pwrite_np && dl_guarded_write_np) {
      if (!allowmmap) {
        guardflags |= (GUARD_WRITE );
      }
    }
    if (dl_guarded_mmap_np) {
      guardflags |= ( GUARD_MMAP );
    }
    int dpc = 0;
    if (flags & O_CREAT) {
      dpc = protectionFlags ? protectionFlags : 0;
    }
    if (dl_guarded_open_dprotected_np && dpc) {
      return dl_guarded_open_dprotected_np(zFile, &guard, guardflags, flags, dpc, 0, mode);
    } else {
      return dl_guarded_open_np(zFile, &guard, guardflags, flags, mode);
    }
  }
#endif
  return open(zFile, flags, mode);
}

/*
** On some systems, calls to fchown() will trigger a message in a security
** log if they come from non-root processes.  So avoid calling fchown() if
** we are not running as root.
*/
static int posixFchown(int fd, uid_t uid, gid_t gid){
  return geteuid() ? 0 : fchown(fd,uid,gid);
}

static ssize_t apple_write(int fildes, const void *buf, size_t nbyte, off_t offset) {
#if defined(USE_GUARDED_FD)&&defined(__APPLE__)
  if( dl_guarded_write_np ){
      return dl_guarded_write_np(fildes, &guard, buf, nbyte);
  }
#endif
  return write(fildes, buf, nbyte);
}

static ssize_t apple_Pwrite(int fildes, const void *buf, size_t nbyte, off_t offset) {
#if defined(USE_GUARDED_FD)&&defined(__APPLE__)
  if( dl_guarded_pwrite_np ){
      return dl_guarded_pwrite_np(fildes, &guard, buf, nbyte, offset);
  }
#endif
  return pwrite(fildes, buf, nbyte, offset);;
}

static ssize_t os_rawPwrite(int fildes, const void *buf, size_t nbyte, off_t offset) {
  return pwrite(fildes, buf, nbyte, offset);
}

static int posixOpen2(const char *zFile, int flags, int mode){
  return posixOpen(zFile, flags, mode, 0, 1);
}

static int posixClose(int fd){
#if defined(USE_GUARDED_FD)&&defined(__APPLE__)
  if( dl_guarded_close_np ){
    return dl_guarded_close_np(fd, &guard);
  }
#endif
  return close(fd);
}

/* Forward reference */
static int openDirectory(const char*, int*);
static int unixGetpagesize(void);

/*
** Many system calls are accessed through pointer-to-functions so that
................................................................................
** to all overrideable system calls.
*/
static struct unix_syscall {
  const char *zName;            /* Name of the system call */
  sqlite3_syscall_ptr pCurrent; /* Current value of the system call */
  sqlite3_syscall_ptr pDefault; /* Default value */
} aSyscall[] = {
  { "open",         (sqlite3_syscall_ptr)posixOpen2,  0  },
#define osOpen      ((int(*)(const char*,int,int))aSyscall[0].pCurrent)

  { "close",        (sqlite3_syscall_ptr)posixClose, 0  },
#define osClose     ((int(*)(int))aSyscall[1].pCurrent)

  { "access",       (sqlite3_syscall_ptr)access,     0  },
#define osAccess    ((int(*)(const char*,int))aSyscall[2].pCurrent)

  { "getcwd",       (sqlite3_syscall_ptr)getcwd,     0  },
#define osGetcwd    ((char*(*)(char*,size_t))aSyscall[3].pCurrent)
................................................................................
#if defined(USE_PREAD64)
  { "pread64",      (sqlite3_syscall_ptr)pread64,    0  },
#else
  { "pread64",      (sqlite3_syscall_ptr)0,          0  },
#endif
#define osPread64   ((ssize_t(*)(int,void*,size_t,off_t))aSyscall[10].pCurrent)

  { "write",        (sqlite3_syscall_ptr)apple_write,      0  },
#define osWrite     ((ssize_t(*)(int,const void*,size_t))aSyscall[11].pCurrent)

#if defined(USE_PREAD) || SQLITE_ENABLE_LOCKING_STYLE
  { "pwrite",       (sqlite3_syscall_ptr)apple_Pwrite,     0  },
#else
  { "pwrite",       (sqlite3_syscall_ptr)0,          0  },
#endif
#define osPwrite    ((ssize_t(*)(int,const void*,size_t,off_t))\
                    aSyscall[12].pCurrent)

#if defined(USE_PREAD64)
................................................................................

#if !defined(SQLITE_OMIT_WAL) || SQLITE_MAX_MMAP_SIZE>0
  { "mmap",       (sqlite3_syscall_ptr)mmap,     0 },
#define osMmap ((void*(*)(void*,size_t,int,int,int,off_t))aSyscall[21].pCurrent)

  { "munmap",       (sqlite3_syscall_ptr)munmap,          0 },
#define osMunmap ((void*(*)(void*,size_t))aSyscall[22].pCurrent)

{ "umask",        (sqlite3_syscall_ptr)0,           0 },

#if HAVE_MREMAP
  { "mremap",       (sqlite3_syscall_ptr)mremap,          0 },
#else
  { "mremap",       (sqlite3_syscall_ptr)0,               0 },
#endif
#define osMremap ((void*(*)(void*,size_t,size_t,int,...))aSyscall[23].pCurrent)
................................................................................
** and -shm files.  We want those files to have *exactly* the same
** permissions as their original database, unadulterated by the umask.
** In that way, if a database file is -rw-rw-rw or -rw-rw-r-, and a
** transaction crashes and leaves behind hot journals, then any
** process that is able to write to the database will also be able to
** recover the hot journals.
*/

static int robust_open2(const char *z, int f, mode_t m, int protectionFlags, int allowmmap){
  int fd = -1;
  mode_t m2 = m ? m : SQLITE_DEFAULT_FILE_PERMISSIONS;

#if defined(O_CLOEXEC)
  f = f|O_CLOEXEC;
#endif

  do{
    if (osOpen == posixOpen2) {
      fd = posixOpen(z,f,m2, protectionFlags, allowmmap);
    } else {
      fd = osOpen(z,f,m2);
    }
    if( fd>=SQLITE_MINIMUM_FILE_DESCRIPTOR ) break;
    osClose(fd);
    sqlite3_log(SQLITE_WARNING, 
                "attempt to open \"%s\" as file descriptor %d", z, fd);
    fd = -1;
    // numist: is this ok with sandboxing?
    if( osOpen("/dev/null", f, m)<0 ) break;
  }while( fd<0 && errno==EINTR );

  if( fd>=0 ) {
  if( m!=0 ){
    struct stat statbuf;
    if( osFstat(fd, &statbuf)==0 
       && statbuf.st_size==0
       && (statbuf.st_mode&0777)!=m 
      ){
        osFchmod(fd, m);
      }
    }
#if defined(FD_CLOEXEC) && (!defined(O_CLOEXEC) || O_CLOEXEC==0)
    osFcntl(fd, F_SETFD, osFcntl(fd, F_GETFD, 0) | FD_CLOEXEC);
#endif
  }
  return fd;
}

static int robust_open(const char *z, int f, mode_t m, int protectionFlags) {
  return robust_open2(z, f, m, protectionFlags, 0);
}

/*
** Helper functions to obtain and relinquish the global mutex. The
** global mutex is used to protect the unixInodeInfo and
** vxworksFileId objects used by this file, all of which may be 
** shared by multiple threads.
**
................................................................................
static void closePendingFds(unixFile *pFile){
  unixInodeInfo *pInode = pFile->pInode;
  UnixUnusedFd *p;
  UnixUnusedFd *pNext;
  for(p=pInode->pUnused; p; p=pNext){
    pNext = p->pNext;
#if OSCLOSE_CHECK_CLOSE_IOERR
    if( osClose(p->fd) ){
      storeLastErrno(pFile, errno);
      rc = SQLITE_IOERR_CLOSE;
      p->pNext = pError;
      pError = p;
    }else{
      sqlite3_free(p);
    }
................................................................................
  ** prior to accessing the inode number.  The one byte written is
  ** an ASCII 'S' character which also happens to be the first byte
  ** in the header of every SQLite database.  In this way, if there
  ** is a race condition such that another thread has already populated
  ** the first page of the database, no damage is done.
  */
  if( statbuf.st_size==0 && (pFile->fsFlags & SQLITE_FSFLAGS_IS_MSDOS)!=0 ){
    do{ rc = (int)osWrite(fd, "S", 1); }while( rc<0 && errno==EINTR );
    if( rc!=1 ){
      storeLastErrno(pFile, errno);
      return SQLITE_IOERR;
    }
    rc = osFstat(fd, &statbuf);
    if( rc!=0 ){
      storeLastErrno(pFile, errno);
................................................................................
    if( pInode->bProcessLock==0 ){
      struct flock lock;
      assert( pInode->nLock==0 );
      lock.l_whence = SEEK_SET;
      lock.l_start = SHARED_FIRST;
      lock.l_len = SHARED_SIZE;
      lock.l_type = F_WRLCK;
#ifdef SQLITE_USE_FLOCKTIMEOUT
      if( pFile->nextFlockTimeout>0 ){
        struct timespec ts;
        struct flocktimeout fltimeout;
        
        ts.tv_sec = pFile->nextFlockTimeout / 1000;
        ts.tv_nsec = (((long)pFile->nextFlockTimeout) % 1000L) * 1000000L;
        fltimeout.fl = lock;
        fltimeout.timeout = ts;
        
        rc = osFcntl(pFile->h, F_SETLKWTIMEOUT, &fltimeout);
        if( !rc ){
          /* reset the timeout on success */
          pFile->nextFlockTimeout = 0;
        }
      }else{
        rc = osFcntl(pFile->h, F_SETLK, &lock);
      }
#else
      rc = osFcntl(pFile->h, F_SETLK, &lock);
#endif
      if( rc<0 ) return rc;
      pInode->bProcessLock = 1;
      pInode->nLock++;
    }else{
      rc = 0;
    }
  }else{
    int i = 0;                      
    do {
#ifdef SQLITE_USE_FLOCKTIMEOUT
      if( (i>0)||(pFile->nextFlockTimeout>0) ){
        struct timespec ts;
        struct flocktimeout fltimeout;
        
        if( i==0 ){
          ts.tv_sec = pFile->nextFlockTimeout / 1000;
          ts.tv_nsec = (((long)pFile->nextFlockTimeout) % 1000L) * 1000000L;
        }else{
          long usTimeout = (i*100);
          assert(i<10000);
          ts.tv_sec = 0;
          ts.tv_nsec = usTimeout * 1000;
        }
        fltimeout.fl = *pLock;
        fltimeout.timeout = ts;
        
        rc = osFcntl(pFile->h, F_SETLKWTIMEOUT, &fltimeout);
        if( !rc ){
          /* reset the timeout on success */
          pFile->nextFlockTimeout = 0;
        }
      }else{
        rc = osFcntl(pFile->h, F_SETLK, pLock);
      }
      i++;
#else
      rc = osFcntl(pFile->h, F_SETLK, pLock);
      if( rc && nRetry ){
         usleep(100 * (++i));
      }
#endif
    }while( !rc && nRetry-- );
  }
  return rc;
}

/*
** Lock the file with the lock specified by parameter eFileLock - one
................................................................................
  /* If some thread using this PID has a lock via a different unixFile*
  ** handle that precludes the requested lock, return BUSY.
  */
  if( (pFile->eFileLock!=pInode->eFileLock && 
          (pInode->eFileLock>=PENDING_LOCK || eFileLock>SHARED_LOCK))
  ){
    rc = SQLITE_BUSY;
#ifdef SQLITE_USE_FLOCKTIMEOUT
    if( pFile->nextFlockTimeout>0 ){
      usleep(((int)pFile->nextFlockTimeout) * 1000L);
    }
#endif
    goto end_lock;
  }

  /* If a SHARED lock is requested, and some thread using this PID already
  ** has a SHARED or RESERVED lock, then increment reference counts and
  ** return SQLITE_OK.
  */
................................................................................
      pInode->nLock++;
      pInode->nShared = 1;
    }
  }else if( eFileLock==EXCLUSIVE_LOCK && pInode->nShared>1 ){
    /* We are trying for an exclusive lock but another thread in this
    ** same process is still holding a shared lock. */
    rc = SQLITE_BUSY;
#ifdef SQLITE_USE_FLOCKTIMEOUT
    if( pFile->nextFlockTimeout>0 ){
      usleep(((int)pFile->nextFlockTimeout) * 1000L);
    }
#endif
  }else{
    /* The request was for a RESERVED or EXCLUSIVE lock.  It is
    ** assumed that there is a SHARED or greater lock on the file
    ** already.
    */
    assert( 0!=pFile->eFileLock );
    lock.l_type = F_WRLCK;
................................................................................
** vxworksReleaseFileId() routine.
*/
static int closeUnixFile(sqlite3_file *id){
  unixFile *pFile = (unixFile*)id;
#if SQLITE_MAX_MMAP_SIZE>0
  unixUnmapfile(pFile);
#endif
#if OSCLOSE_CHECK_CLOSE_IOERR
  if( pFile->h>=0 ){
    int err = osClose(pFile->h);
    if( err ){
      storeLastErrno(pFile, errno);
      return SQLITE_IOERR_CLOSE;
    }else{
      pFile->h=-1;
    }
  }
#else
  if( pFile->h>=0 ){
    robust_close(pFile, pFile->h, __LINE__);
    pFile->h = -1;
  }
#endif
#if OS_VXWORKS
  if( pFile->pId ){
    if( pFile->ctrlFlags & UNIXFILE_DELETE ){
      osUnlink(pFile->pId->zCanonicalName);
    }
    vxworksReleaseFileId(pFile->pId);
    pFile->pId = 0;
................................................................................
  /* grab an exclusive lock */
  rc = osMkdir(zLockFile, 0777);
  if( rc<0 ){
    /* failed to open/create the lock directory */
    int tErrno = errno;
    if( EEXIST == tErrno ){
      rc = SQLITE_BUSY;
#ifdef SQLITE_USE_FLOCKTIMEOUT
      if( pFile->nextFlockTimeout>0 ){
        usleep(((int)pFile->nextFlockTimeout) * 1000L);
      }
#endif
    } else {
      rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_LOCK);
      if( IS_LOCK_ERROR(rc) ){
        storeLastErrno(pFile, tErrno);
      }
    }
    return rc;
................................................................................
    pFile->eFileLock = eFileLock;
  }
  OSTRACE(("LOCK    %d %s %s (flock)\n", pFile->h, azFileLock(eFileLock), 
           rc==SQLITE_OK ? "ok" : "failed"));
#ifdef SQLITE_IGNORE_FLOCK_LOCK_ERRORS
  if( (rc & SQLITE_IOERR) == SQLITE_IOERR ){
    rc = SQLITE_BUSY;
#ifdef SQLITE_USE_FLOCKTIMEOUT
    if( pFile->nextFlockTimeout>0 ){
      usleep(((long)pFile->nextFlockTimeout) * 1000L);
    }
#endif
  }
#endif /* SQLITE_IGNORE_FLOCK_LOCK_ERRORS */
  return rc;
}


/*
................................................................................
    rc = SQLITE_OK;
    goto sem_end_lock;
  }
  
  /* lock semaphore now but bail out when already locked. */
  if( sem_trywait(pSem)==-1 ){
    rc = SQLITE_BUSY;
#ifdef SQLITE_USE_FLOCKTIMEOUT
    if( pFile->nextFlockTimeout>0 ){
      usleep(((long)pFile->nextFlockTimeout) * 1000L);
    }
#endif
    goto sem_end_lock;
  }

  /* got it, set the type and return ok */
  pFile->eFileLock = eFileLock;

 sem_end_lock:
................................................................................
#else
    rc = sqliteErrorFromPosixError(tErrno,
                    setLockFlag ? SQLITE_IOERR_LOCK : SQLITE_IOERR_UNLOCK);
#endif /* SQLITE_IGNORE_AFP_LOCK_ERRORS */
    if( IS_LOCK_ERROR(rc) ){
      storeLastErrno(pFile, tErrno);
    }
#ifdef SQLITE_USE_FLOCKTIMEOUT
    if( (rc==SQLITE_BUSY)&&(pFile->nextFlockTimeout>0) ){
      usleep(((int)pFile->nextFlockTimeout) * 1000L);
    }
#endif
    return rc;
  } else {
    return SQLITE_OK;
  }
}

/*
................................................................................
  /* If some thread using this PID has a lock via a different unixFile*
  ** handle that precludes the requested lock, return BUSY.
  */
  if( (pFile->eFileLock!=pInode->eFileLock && 
       (pInode->eFileLock>=PENDING_LOCK || eFileLock>SHARED_LOCK))
     ){
    rc = SQLITE_BUSY;
#ifdef SQLITE_USE_FLOCKTIMEOUT
    if( pFile->nextFlockTimeout>0 ){
      usleep(((int)pFile->nextFlockTimeout) * 1000L);
    }
#endif
    goto afp_end_lock;
  }
  
  /* If a SHARED lock is requested, and some thread using this PID already
  ** has a SHARED or RESERVED lock, then increment reference counts and
  ** return SQLITE_OK.
  */
................................................................................
      pInode->nLock++;
      pInode->nShared = 1;
    }
  }else if( eFileLock==EXCLUSIVE_LOCK && pInode->nShared>1 ){
    /* We are trying for an exclusive lock but another thread in this
     ** same process is still holding a shared lock. */
    rc = SQLITE_BUSY;
#ifdef SQLITE_USE_FLOCKTIMEOUT
    if( pFile->nextFlockTimeout>0 ){
      usleep(((int)pFile->nextFlockTimeout) * 1000L);
    }
#endif
  }else{
    /* The request was for a RESERVED or EXCLUSIVE lock.  It is
    ** assumed that there is a SHARED or greater lock on the file
    ** already.
    */
    int failed = 0;
    assert( 0!=pFile->eFileLock );
................................................................................
    pFile->inNormalWrite = 0;
#endif
    
    if( pFile->eFileLock==EXCLUSIVE_LOCK ){
      rc = afpSetLock(context->dbPath, pFile, SHARED_FIRST, SHARED_SIZE, 0);
      if( rc==SQLITE_OK && (eFileLock==SHARED_LOCK || pInode->nShared>1) ){
        /* only re-establish the shared lock if necessary */
        int sharedLockByte = (int) (SHARED_FIRST+pInode->sharedByte);
        rc = afpSetLock(context->dbPath, pFile, sharedLockByte, 1, 1);
      } else {
        skipShared = 1;
      }
    }
    if( rc==SQLITE_OK && pFile->eFileLock>=PENDING_LOCK ){
      rc = afpSetLock(context->dbPath, pFile, PENDING_BYTE, 1, 0);
................................................................................
*/
static int seekAndRead(unixFile *id, sqlite3_int64 offset, void *pBuf, int cnt){
  int got;
  int prior = 0;
#if (!defined(USE_PREAD) && !defined(USE_PREAD64))
  i64 newOffset;
#endif

#if defined(__APPLE__)
  /* <rdar://problem/17742712> */
  if( id->nFsBytes > 0 && offset + cnt > id->nFsBytes ){
    __builtin_trap();
  }
#endif
  TIMER_START;
  assert( cnt==(cnt&0x1ffff) );
  assert( id->h>2 );
  cnt &= 0x1ffff;
  do{
#if defined(USE_PREAD)
    got = (int)osPread(id->h, pBuf, cnt, offset);
    SimulateIOError( got = -1 );
#elif defined(USE_PREAD64)
    got = osPread64(id->h, pBuf, cnt, offset);
    SimulateIOError( got = -1 );
#else
    newOffset = lseek(id->h, offset, SEEK_SET);
    SimulateIOError( newOffset-- );
................................................................................
  int fd,                         /* File descriptor to write to */
  i64 iOff,                       /* File offset to begin writing at */
  const void *pBuf,               /* Copy data from this buffer to the file */
  int nBuf,                       /* Size of buffer pBuf in bytes */
  int *piErrno                    /* OUT: Error number if error occurs */
){
  int rc = 0;                     /* Value returned by system call */
#if (!defined(USE_PREAD) && !defined(USE_PREAD64))
  i64 newOffset;
#endif

  assert( nBuf==(nBuf&0x1ffff) );
  assert( fd>2 );
  nBuf &= 0x1ffff;
  TIMER_START;

#if defined(USE_PREAD)
................................................................................
** Seek to the offset in id->offset then read cnt bytes into pBuf.
** Return the number of bytes actually read.  Update the offset.
**
** To avoid stomping the errno value on a failed write the lastErrno value
** is set before returning.
*/
static int seekAndWrite(unixFile *id, i64 offset, const void *pBuf, int cnt){
#if defined(__APPLE__)
  /* <rdar://problem/17742712> */
  if( id->nFsBytes > 0 && offset + cnt > id->nFsBytes ){
    __builtin_trap();
  }
#endif
  return seekAndWriteFd(id->h, offset, pBuf, cnt, &id->lastErrno);
}


/*
** Write data from a buffer into a file.  Return SQLITE_OK on success
** or some other error code on failure.
................................................................................
  int fd = -1;
  char zDirname[MAX_PATHNAME+1];

  sqlite3_snprintf(MAX_PATHNAME, zDirname, "%s", zFilename);
  for(ii=(int)strlen(zDirname); ii>1 && zDirname[ii]!='/'; ii--);
  if( ii>0 ){
    zDirname[ii] = '\0';
    fd = robust_open(zDirname, O_RDONLY|O_BINARY, 0, 0);
    if( fd>=0 ){
      OSTRACE(("OPENDIR %-3d %s\n", fd, zDirname));
    }
  }
  *pFd = fd;
  return (fd>=0?SQLITE_OK:unixLogError(SQLITE_CANTOPEN_BKPT, "open", zDirname));
}
................................................................................
    int dirfd;
    OSTRACE(("DIRSYNC %s (have_fullfsync=%d fullsync=%d)\n", pFile->zPath,
            HAVE_FULLFSYNC, isFullsync));
    rc = osOpenDirectory(pFile->zPath, &dirfd);
    if( rc==SQLITE_OK && dirfd>=0 ){
      full_fsync(dirfd, 0, 0);
#if OSCLOSE_CHECK_CLOSE_IOERR
      if( osClose(pFile->dirfd) ){
        storeLastErrno(pFile, errno);
        rc = SQLITE_IOERR_DIR_CLOSE;
      }
#else
      robust_close(pFile, dirfd, __LINE__);
#endif
    }else if( rc==SQLITE_CANTOPEN ){
................................................................................
** nBytes or larger, this routine is a no-op.
*/
static int fcntlSizeHint(unixFile *pFile, i64 nByte){
  if( pFile->szChunk>0 ){
    i64 nSize;                    /* Required file size */
    struct stat buf;              /* Used to hold return values of fstat() */
   
    if( osFstat(pFile->h, &buf) ) {
      storeLastErrno(pFile, errno);
      return SQLITE_IOERR_FSTAT;
    }

    nSize = ((nByte+pFile->szChunk-1) / pFile->szChunk) * pFile->szChunk;
    if( nSize>(i64)buf.st_size ){

#if defined(HAVE_POSIX_FALLOCATE) && HAVE_POSIX_FALLOCATE
      /* The code below is handling the return value of osFallocate() 
      ** correctly. posix_fallocate() is defined to "returns zero on success, 
................................................................................
    return rc;
  }
#endif

  return SQLITE_OK;
}

#if SQLITE_ENABLE_DATA_PROTECTION
static int unixSetFileProtection(int fd, int protFlags, int isShm){
  int protClass;
  int currClass;
  
  if( 0==protFlags ){
    return SQLITE_OK;
  }
  assert(fd>=0);
  assert((protFlags&SQLITE_OPEN_FILEPROTECTION_MASK)==protFlags);
  
  protClass = (!isShm) ? unixProtectionClassForVFSProtectionFlags(protFlags) : shmUnixProtectionClassForVFSProtectionFlags(protFlags);
  
# if defined(__APPLE__)&&(TARGET_OS_EMBEDDED!=0)&&\
(!defined(TARGET_IPHONE_SIMULATOR)||(TARGET_IPHONE_SIMULATOR==0))
  
  currClass = fcntl(fd, F_GETPROTECTIONCLASS);
  if( currClass<1 && protClass==4 ){
    /* F_GETPROTECTIONCLASS will fail if the file system doesn't have content protection enabled, 
     * if the protClass is 4/NONE that's OK */
    return SQLITE_OK;
  }
  if( protClass!=currClass ){
    if (0 != fcntl(fd, F_SETPROTECTIONCLASS, protClass)) {
      if( errno == EPERM ){
        /* <rdar://problem/9385939> Test device locked state when error reporting for content protection issues */        
        return SQLITE_AUTH;
      }
      return SQLITE_IOERR;
    }

    rc = unixMapfile(pFile, nByte);
    return rc;
  }
# else
# warning SQLITE_ENABLE_DATA_PROTECTION is defined but could not be enabled for this deployment target
# endif
  return SQLITE_OK;
}
#endif /* SQLITE_ENABLE_DATA_PROTECTION */

#if (SQLITE_ENABLE_APPLE_SPI>0) && defined(__APPLE__)
#include "sqlite3_private.h"
#include <copyfile.h>
static int getDbPathForUnixFile(unixFile *pFile, char *dbPath);
#endif

#if SQLITE_ENABLE_LOCKING_STYLE
static int isProxyLockingMode(unixFile *);
#endif

#if (SQLITE_ENABLE_APPLE_SPI>0) && defined(__APPLE__)
static int unixTruncateDatabase(unixFile *, int);
static const char *unixTempFileDir(void);

static int unixInvalidateSupportFiles(unixFile *, int);

static int findCreateFileMode(const char *, int, mode_t*, uid_t *,gid_t *);

/* opens a read/write connection to a file zName inheriting the appropriate
** user/perms from the database file if running as root.  Returns the file 
................................................................................
  int *pFd
){
  int fd = -1;
  mode_t openMode;              /* Permissions to create file with */
  uid_t uid;                    /* Userid for the file */
  gid_t gid;                    /* Groupid for the file */
  int rc;
  int isShm = 0;
  
  int zNameLen = zName ? (int)strlen(zName) : 0;
  if (zNameLen > 4) {
    const char* suffix = &(zName[zNameLen-4]);
    if (strncmp("-shm", suffix, 4) == 0) {
      isShm = 1;
    }
  }
  assert(pFd!=NULL);
  rc = findCreateFileMode(zName, dbOpenFlags, &openMode, &uid, &gid);
  if( rc!=SQLITE_OK ){
    return rc;
  }
  int unixProtFlags = (!isShm) ? unixProtectionClassForVFSProtectionFlags(protFlags) : shmUnixProtectionClassForVFSProtectionFlags(protFlags);
  
  fd = robust_open2(zName, openFlags, openMode, unixProtFlags, isShm);
  OSTRACE(("OPENX   %-3d %s 0%o\n", fd, zName, openFlags));
  if( fd<0 ){
#if SQLITE_ENABLE_DATA_PROTECTION
    if( errno==EPERM ){
      /* <rdar://problem/9385939> Test device locked state when error reporting for content protection issues */
      rc = unixLogError(SQLITE_AUTH, "open", zName);
    }else{
      rc = unixLogError(SQLITE_CANTOPEN_BKPT, "open", zName);
    }
#else
    rc = unixLogError(SQLITE_CANTOPEN_BKPT, "open", zName);
#endif
    return rc;
  }
  /* if we're opening the wal or journal and running as root, set
  ** the journal uid/gid */
  if( dbOpenFlags & (SQLITE_OPEN_WAL|SQLITE_OPEN_MAIN_JOURNAL) ){
    uid_t euid = geteuid();
    if( euid==0 && (euid!=uid || getegid()!=gid) ){
      if( fchown(fd, uid, gid) ){
        rc = SQLITE_CANTOPEN_BKPT;
      }
    }
  }
#if SQLITE_ENABLE_DATA_PROTECTION
  if( rc==SQLITE_OK ){
    rc = unixSetFileProtection(fd, protFlags, isShm);
  }
#endif
  if( rc==SQLITE_OK ){
    *pFd = fd;
  } else {
    *pFd = -1;
    osClose(fd);
  }
  return rc;
}

static int readWALSettingFromFile(unixFile *pFile) {
  char magicword[20];
  int result = -1;
  sqlite3_file *id = (sqlite3_file *)pFile;
  if (id != NULL) {
    int sqlitecode = id->pMethods->xRead(id, magicword, sizeof(magicword), 0l);
    
    if (SQLITE_OK == sqlitecode) {
      if (0 == memcmp(magicword, "SQLite format 3", 15)) {
        result = 0;
        if ((magicword[18] == 2) && (magicword[19] == 2)) {
          result = 1;
        }
      }
    }
  }
  return result;
}

static int sqlite_guarded_fcopyfile(int src_fd, int dst_fd) {
  size_t blen;
  char *bp = 0;
  ssize_t nread;
  int ret = 0;
  size_t iBlocksize = 0;
  size_t oBlocksize = 0;
  size_t totalCopied = 0;
  const size_t twomeg = (1024 * 1024 * 2);
  struct statfs sfs;
  bzero(&sfs, sizeof(struct statfs));
  struct stat sbuf;
  bzero(&sbuf, sizeof(struct stat));
  int err = -1;
        
  fstat(src_fd, &sbuf);
  
  if (fstatfs(src_fd, &sfs) == -1) {
    iBlocksize = sbuf.st_blksize;
  } else {
    iBlocksize = sfs.f_iosize;
  }
  
  if (iBlocksize > twomeg) {
    iBlocksize = twomeg;
  }
  
  if ((bp = malloc(iBlocksize)) == NULL)
    return -1;
  
  oBlocksize = iBlocksize;
  
  blen = iBlocksize;
  
  /* If supported, do preallocation for Xsan / HFS volumes */
#ifdef F_PREALLOCATE
  {
    fstore_t fst;
    
    fst.fst_flags = 0;
    fst.fst_posmode = F_PEOFPOSMODE;
    fst.fst_offset = 0;
    fst.fst_length = sbuf.st_size;
    /* Ignore errors; this is merely advisory. */
    (void)fcntl(dst_fd, F_PREALLOCATE, &fst);
  }
#endif
  
  while ((nread = osRead(src_fd, bp, blen)) > 0)
  {
    ssize_t nwritten;
    size_t left = nread;
    void *ptr = bp;
    int loop = 0;
    
    while (left > 0) {
      nwritten = osWrite(dst_fd, ptr, MIN(left, oBlocksize));
      switch (nwritten) {
        case 0:
          if (++loop > 5) {
            ret = -1;
            err = EAGAIN;
            goto exit;
          }
          break;
        case -1:
          ret = -1;
          goto exit;
        default:
          left -= nwritten;
          ptr = ((char*)ptr) + nwritten;
          loop = 0;
          break;
      }
      totalCopied += nwritten;
    }
  }
  if (nread < 0)
  {
    ret = -1;
    goto exit;
  }
  
  if (ftruncate(dst_fd, totalCopied) < 0)
  {
    ret = -1;
    goto exit;
  }
  
exit:
  if (ret == -1)
  {
    if (err != -1) {
      errno = err;
    } else {
      err = errno;
    }
  }
  free(bp);
  return (ret != -1) ? 0 : err;
}


static int unixReplaceDatabase(unixFile *pFile, sqlite3 *srcdb) {
  sqlite3_file *id = (sqlite3_file *)pFile;
  Btree *pSrcBtree = NULL;
  sqlite3_file *src_file = NULL;
  unixFile *pSrcFile = NULL;
  char srcWalPath[MAXPATHLEN+5];
  int srcWalFD = -1;
  int rc = SQLITE_OK;
  Superlock *pLock = NULL;
  int flags = 0;
  sqlite3 *srcdb2 = NULL;
  copyfile_state_t s;
  int corruptSrcFileLock = 0;
  int corruptDstFileLock = 0;
  int isSrcCorrupt = 0;
  int isDstCorrupt = 0;
  int shouldCopySrc = 0;
  int isDstWAL = -1;
  int isSrcWAL = -1;
  int extraFDtoClose = -1;
  char* replacementSrcPath = NULL;
  char* replacementSrcWALPath = NULL;
  char* replacementSrcShmPath = NULL;
  int notGuardedFileDescriptors = 0;
  int dstPreExists = 1;
  struct stat checkBuffer;
  int srcFlags = 0;
  
  if( !sqlite3SafetyCheckOk(srcdb) ){
    return SQLITE_MISUSE;
  }
    
  const char* realSrcPath = sqlite3_db_filename(srcdb, NULL);
  
  const char *tDir = unixTempFileDir();
  int tDirLen = tDir ? (int)strlen(tDir) : 0;
  if (tDirLen < 1) {
    _open_error_asl_log();
    asl_log(errorlog_client, NULL, ASL_LEVEL_CRIT, "SQLite: replace database failed because TMPDIR is not set correctly\n");

    return SQLITE_PERM;
  }

  if (0 == stat(pFile->zPath, &checkBuffer)) {
    if (checkBuffer.st_size == 0l) {
      dstPreExists = 0;
    }
  } else {
    if (errno == ENOENT) {
      dstPreExists = 0;
    }
  }
#if SQLITE_ENABLE_DATA_PROTECTION
  flags |= pFile->protFlags;
#endif
#if SQLITE_ENABLE_LOCKING_STYLE
  if( isProxyLockingMode(pFile) ){
    flags |= SQLITE_OPEN_AUTOPROXY;
  }
#endif
  
  rc = sqlite3demo_superlock(pFile->zPath, 0, flags, 0, 0, (void**)&pLock);
  if( rc ){
    if( rc==SQLITE_CORRUPT || rc==SQLITE_NOTADB ){
      isDstCorrupt = 1;
      rc = sqlite3demo_superlock_corrupt(id, SQLITE_LOCK_EXCLUSIVE,
                                         &corruptDstFileLock);
    }
    if( rc ){
      return rc;
    }
  } else {
    isDstWAL = ((pLock->bWal) ? 1 : 0);
  }
  /* get the src file descriptor adhering to the db struct access rules 
   ** this code is modeled after sqlite3_file_control() in main.c
   */ 
  sqlite3_mutex_enter(srcdb->mutex);
  if( srcdb->nDb>0 ){
    pSrcBtree = srcdb->aDb[0].pBt;
................................................................................
    Pager *pSrcPager;
    sqlite3BtreeEnter(pSrcBtree);
    pSrcPager = sqlite3BtreePager(pSrcBtree);
    assert( pSrcPager!=0 );
    src_file = sqlite3PagerFile(pSrcPager);
    assert( src_file!=0 );
    if( src_file->pMethods ){

      pSrcFile = (unixFile *)src_file;
#if SQLITE_ENABLE_LOCKING_STYLE || defined(__APPLE__)
      if ((pSrcFile->openFlags & O_RDWR) == O_RDWR) {
        srcFlags = SQLITE_OPEN_READWRITE;
      } else {
        srcFlags = SQLITE_OPEN_READONLY;
      }
................................................................................
      srcFlags |= pSrcFile->protFlags;
#endif
#if SQLITE_ENABLE_LOCKING_STYLE
      if( isProxyLockingMode(pSrcFile) ){
        srcFlags |= SQLITE_OPEN_AUTOPROXY;
      }
#endif
      
      rc = sqlite3_open_v2(pSrcFile->zPath, &srcdb2, srcFlags, 0);
      if( rc==SQLITE_OK ){
        sqlite3_file* tempSrcFile = NULL;
        int anotherError = sqlite3_file_control(srcdb2, NULL, SQLITE_FCNTL_FILE_POINTER, &tempSrcFile);

        if (anotherError == SQLITE_OK && tempSrcFile) {
          isSrcWAL = (1== readWALSettingFromFile((unixFile*)tempSrcFile)) ? 1 : 0;
        } else {
          isSrcWAL = (1== readWALSettingFromFile(pSrcFile)) ? 1 : 0;
        }

        sqlite3_busy_timeout(srcdb2, srcdb->busyTimeout);
        /* start a deferred transaction and read to establish a read lock */
        rc = sqlite3_exec(srcdb2, "BEGIN DEFERRED; PRAGMA schema_version", 0, 0, 0);

        
        if (rc == SQLITE_CANTOPEN) {
          if (isSrcWAL) {
            // try opening writeable and again
            sqlite3_close(srcdb2);
            srcdb2 = NULL;
            rc = sqlite3_open_v2(pSrcFile->zPath, &srcdb2, ((srcFlags & (~SQLITE_OPEN_READONLY))| SQLITE_OPEN_READWRITE), 0);
            if( rc==SQLITE_OK ){
              sqlite3_busy_timeout(srcdb2, srcdb->busyTimeout);
              /* start a deferred transaction and read to establish a read lock */
              rc = sqlite3_exec(srcdb2, "BEGIN DEFERRED; PRAGMA schema_version", 0, 0, 0);
            }
          }
        }
        
        if (isSrcWAL && (rc == SQLITE_CANTOPEN)) {
          // try copying to temp and opening writeable
          if (srcdb2) {
            sqlite3_close(srcdb2);
            srcdb2 = NULL;
          }
          rc = SQLITE_OK;  // well, maybe
          shouldCopySrc = 1;
        }
        if (dstPreExists && (isSrcWAL != isDstWAL) && (!isDstCorrupt)) {
          shouldCopySrc = 1;
        }

        if( rc==SQLITE_CORRUPT || rc==SQLITE_NOTADB ){
          isSrcCorrupt = 1;
          rc = sqlite3demo_superlock_corrupt(src_file, SQLITE_LOCK_SHARED,
                                             &corruptSrcFileLock);
        }
      }
    }
  }
  if( pSrcFile==NULL || pSrcFile->h<0){
    rc = SQLITE_INTERNAL;
  }
  if( rc!=SQLITE_OK ){
    goto end_replace_database;
  }
  
  int srcFD = pSrcFile->h;
  const char* srcPath = pSrcFile->zPath;
  
  if (shouldCopySrc) {
    sqlite3* newSrcDB = NULL;
    int shouldUnlinkWAL = 0;

    /* initialize a new database in TMPDIR and copy the contents over */
    int tLen = sizeof(char) * (tDirLen + 25);
    replacementSrcPath = (char *)calloc(1, tLen);
    
    int tsrcFd = -1;
    
    strlcpy(replacementSrcPath, tDir, tLen);
    /* create a temporary database with the prefix tmpsqlitereplacedb */
    if( replacementSrcPath[(tDirLen-1)] != '/' ){
      strlcat(replacementSrcPath, "/", tLen);
    }
    strlcat(replacementSrcPath, "tmpsqlitereplacedbXXXXXX", tLen);
    tsrcFd = mkstemp(replacementSrcPath);
    if( tsrcFd==-1 ){
      storeLastErrno(pFile, errno);
      rc = SQLITE_IOERR;
    } else{
      extraFDtoClose = tsrcFd;
      
      replacementSrcWALPath = (char*)calloc(1,tLen+5);
      strlcpy(replacementSrcWALPath, replacementSrcPath, tLen+5);
      strlcat(replacementSrcWALPath, "-wal", tLen+5);

      replacementSrcShmPath = (char*)calloc(1,tLen+5);
      strlcpy(replacementSrcShmPath, replacementSrcPath, tLen+5);
      strlcat(replacementSrcShmPath, "-shm", tLen+5);
      
      // copy src wal & db
      s = copyfile_state_alloc();
      lseek(srcFD, 0, SEEK_SET);
      lseek(tsrcFd, 0, SEEK_SET);
      
      if( fcopyfile(srcFD, tsrcFd, s, COPYFILE_DATA)){
        int err=errno;
        switch(err) {
          case ENOMEM:
            rc = SQLITE_NOMEM;
            break;
          default:
            storeLastErrno(pFile, err);
            rc = SQLITE_IOERR;
        }
      }
      copyfile_state_free(s);
      fsync(tsrcFd);
            
      if (rc == SQLITE_OK) {
        int tSrcWALFD = -1;
        strlcpy(srcWalPath, srcPath, MAXPATHLEN+5);
        strlcat(srcWalPath, "-wal", MAXPATHLEN+5);
        tSrcWALFD = robust_open2(srcWalPath, O_RDONLY, 0, 0, 0);
        if (tSrcWALFD >=0) {
          srcWalFD = robust_open2(replacementSrcWALPath, O_RDWR | O_CREAT | O_TRUNC, 0, 0, 0);
          if ((srcWalFD < 0) && (errno != ENOENT)) {
            storeLastErrno(pFile, errno);
            rc = SQLITE_IOERR;
            osClose(tSrcWALFD);
            tSrcWALFD = -1;
          }
        } else {
          if (errno != ENOENT) {
            storeLastErrno(pFile, errno);
            rc = SQLITE_IOERR;
          }
        }
        
        if (rc == SQLITE_OK) {
          if (srcWalFD >= 0) {
            s = copyfile_state_alloc();
            lseek(srcWalFD, 0, SEEK_SET);
            lseek(tSrcWALFD, 0, SEEK_SET);
            if( sqlite_guarded_fcopyfile(tSrcWALFD, srcWalFD) != 0){
              int err=errno;
              switch(err) {
                case ENOMEM:
                  rc = SQLITE_NOMEM;
                  break;
                default:
                  storeLastErrno(pFile, err);
                  rc = SQLITE_IOERR;
              }
            }
            copyfile_state_free(s);
            fsync(srcWalFD);
          }
          if (tSrcWALFD >= 0) {
            osClose(tSrcWALFD);
          }
          
          // open src as db
          rc = sqlite3_open_v2(replacementSrcPath, &newSrcDB, ((srcFlags & (~SQLITE_OPEN_READONLY))| SQLITE_OPEN_READWRITE), 0);
          if (rc != SQLITE_OK) {
          } else {
            sqlite3_busy_timeout(newSrcDB, srcdb->busyTimeout);
          }


        }
      }

      if (rc != SQLITE_OK) {
        if (newSrcDB) {
          sqlite3_close(newSrcDB);
          newSrcDB = NULL;
        }
      }
      
      if (rc == SQLITE_OK) {
        rc = sqlite3_exec(newSrcDB, "BEGIN DEFERRED; PRAGMA schema_version; COMMIT;", 0, 0, 0);
 
        if (isSrcWAL != isDstWAL) {
          if (isDstWAL) {
            rc = sqlite3_exec(newSrcDB, "PRAGMA journal_mode=WAL", 0, 0, 0);
          } else {
            rc = sqlite3_exec(newSrcDB, "PRAGMA journal_mode=DELETE", 0, 0, 0);
            shouldUnlinkWAL = 1;
          }
        }

        if (srcdb2 == NULL) {
          srcdb2 = newSrcDB;
          sqlite3_exec(newSrcDB, "BEGIN DEFERRED; PRAGMA schema_version;", 0, 0, 0);
        } else {
          sqlite3_close(newSrcDB);
          newSrcDB = NULL;
        }
      }
    
    if (shouldUnlinkWAL) {
      if (srcWalFD >= 0) {
        osClose(srcWalFD);
        srcWalFD = -1;
      }
      unlink(replacementSrcWALPath);
      free(replacementSrcWALPath);
      replacementSrcWALPath = NULL;

      unlink(replacementSrcShmPath);
      free(replacementSrcShmPath);
      replacementSrcShmPath = NULL;
    }

      if (rc == SQLITE_OK) {
        notGuardedFileDescriptors = 1;
        srcFD = tsrcFd;
        srcPath = replacementSrcPath;
      }
    }
    
  }
  
  if (!srcdb2) {
    rc = SQLITE_INTERNAL;
  }
  if( rc!=SQLITE_OK ){
    goto end_replace_database;
  }
  /* both databases are locked appropriately, copy the src wal journal if 
   ** one exists and then the actual database file
   */
  strlcpy(srcWalPath, srcPath, MAXPATHLEN+5);
  strlcat(srcWalPath, "-wal", MAXPATHLEN+5);
  if (srcWalFD < 0) {
    srcWalFD = robust_open2(srcWalPath, O_RDONLY, 0, 0, 0);
  }
  if( !(srcWalFD<0) ){
    char dstWalPath[MAXPATHLEN+5];
    int dstWalFD = -1;
    int protFlags = 0;
    strlcpy(dstWalPath, pFile->zPath, MAXPATHLEN+5);
    strlcat(dstWalPath, "-wal", MAXPATHLEN+5);

#if SQLITE_ENABLE_DATA_PROTECTION
    protFlags = pFile->protFlags;
#endif
    rc = unixOpenChildFile(dstWalPath, O_RDWR|O_CREAT, SQLITE_OPEN_WAL,
                           protFlags, &dstWalFD);
    if( rc==SQLITE_OK ){
      s = copyfile_state_alloc();
      lseek(srcWalFD, 0, SEEK_SET);
      lseek(dstWalFD, 0, SEEK_SET);
      if( sqlite_guarded_fcopyfile(srcWalFD, dstWalFD) != 0){
        int err=errno;
        switch(err) {
          case ENOMEM:
            rc = SQLITE_NOMEM;
            break;
          default:
            storeLastErrno(pFile, err);
            rc = SQLITE_IOERR;
        }
      }
      
      copyfile_state_free(s);
      fsync(dstWalFD);
      osClose(dstWalFD);
    }
    osClose(srcWalFD);
  }
  if( rc==SQLITE_OK ){
    /* before we copy, ensure that the file change counter will be modified */
    uint32_t srcChange = 0;
    uint32_t dstChange = 0;
    pread(srcFD, &srcChange, 4, 24);
    pread(pFile->h, &dstChange, 4, 24);
    
    /* copy the actual database */
    s = copyfile_state_alloc();
    lseek(srcFD, 0, SEEK_SET);
    lseek(pFile->h, 0, SEEK_SET);
    if( sqlite_guarded_fcopyfile(srcFD, pFile->h) != 0 ){
      int err=errno;
      switch(err) {
        case ENOMEM:
          rc = SQLITE_NOMEM;
          break;
        default:
          storeLastErrno(pFile, err);
................................................................................
      }
    }
    copyfile_state_free(s);
    
    if (srcChange == dstChange) {
      /* modify the change counter to force page zero to be reloaded */
      dstChange ++;
      osPwrite(pFile->h, &dstChange, 4, 24);
    }
  }
  if( isSrcCorrupt ){
    sqlite3demo_superunlock_corrupt(src_file, corruptSrcFileLock);
  }else{
    /* done with the source db so end the transaction */
    sqlite3_exec(srcdb2, "COMMIT", 0, 0, 0);
  }
  /* zero out any old journal clutter */
  if( rc==SQLITE_OK ){
    int skipWAL = (srcWalFD<0)?0:1;
    unixInvalidateSupportFiles(pFile, skipWAL);
    pFile->pMethod->xSync((sqlite3_file*)pFile, SQLITE_SYNC_FULL);
  }
  
end_replace_database:
  if (extraFDtoClose >= 0) {
    /* extraFDtoClose is created with mkstemp, can't use guarded close() */
    close(extraFDtoClose);
    extraFDtoClose = -1;
  }
  if (replacementSrcPath) {
    unlink(replacementSrcPath);
    free(replacementSrcPath);
  }
  if (replacementSrcWALPath) {
    unlink(replacementSrcWALPath);
    free(replacementSrcWALPath);
  }
  if (replacementSrcShmPath) {
    unlink(replacementSrcShmPath);
    free(replacementSrcShmPath);
  }
  if (srcdb2) {
    sqlite3_close(srcdb2);
    srcdb2 = NULL;
  }
  if( pSrcBtree ){
    sqlite3BtreeLeave(pSrcBtree);
  }
  sqlite3_mutex_leave(srcdb->mutex);
  if( isDstCorrupt ){
    sqlite3demo_superunlock_corrupt(id, corruptDstFileLock);
  }else{
    sqlite3demo_superunlock(pLock);
  }
  if( rc==SQLITE_OK && (srcWalFD>=0) && !isSrcCorrupt ){
    /* sync up the -shm file */
    sqlite3 *tdb = NULL;
    int trc = sqlite3_open_v2(pFile->zPath, &tdb, SQLITE_OPEN_READWRITE|SQLITE_OPEN_CREATE|flags, 0);
    if( trc==SQLITE_OK ){
      sqlite3_busy_timeout(tdb, srcdb->busyTimeout);
      sqlite3_exec(tdb, "PRAGMA schema_version", 0, 0, 0);
    }
    if( tdb!=NULL ){
      sqlite3_close(tdb);
    }
  }
  
  if (rc) {
    _open_error_asl_log();
    const char* dstPath = pFile ? pFile->zPath : "<dst db null>";

    if (dstPath == NULL) {
      dstPath = "<dst path null>";
    }
    if (realSrcPath == NULL) {
      realSrcPath = "<src path null>";
    }

    asl_log(errorlog_client, NULL, ASL_LEVEL_ERR, "SQLite: unixReplaceDatabase() failed with error %d for replacing '%s' with '%s' \n", (int)rc, dstPath, realSrcPath);
  }
  return rc;
}
#define SQLITE_FILE_HEADER_LEN 16
/* Check for a conflicting lock.  If one is found, print an this
 ** on standard output using the format string given and return 1.
 ** If there are no conflicting locks, return 0.
 */
................................................................................
    return -1;
  }
  
  if( lk.l_type!=F_UNLCK && (pid==SQLITE_LOCKSTATE_ANYPID || lk.l_pid==pid) ){
#ifdef SQLITE_DEBUG
    fprintf(stderr, "%s lock held by %d\n", zType, (int)lk.l_pid);
#endif
    OSTRACE(("GETLOCKSTATE fd-%d type-%s, loc-0x%x len-%d pid-(%d) state=ON\n",
             h, zType, iOfst, iCnt, pid));
    return 1;
  } 
  OSTRACE(("GETLOCKSTATE fd-%d type-%s, loc-0x%x len-%d pid-(%d) state=OFF\n",
           h, zType, iOfst, iCnt, pid));
  return 0;
}

static int unixLockstatePid(unixFile *, pid_t, int *);

/*
  ** Copy data from shared-memory into a buffer.
  **
  ** Returns an error if the mapping has disappeared, or if the memory cannot
  ** be accessed safely.
*/
static int unixShmRead(sqlite3_file *fd,               /* The underlying database file */
                       void *dst,                      /* The destination memory */
                       volatile void *src,             /* The source (mapped) memory */
                       sqlite3_int64 nByte             /* Size of the destination */
){
#if defined(__APPLE__)
    unixFile *pDbFd;                /* The underlying database file */

  pDbFd = (unixFile*)fd;

  if ( pDbFd->fsFlags & SQLITE_FSFLAGS_IS_MMAP_SAFE ) {
      memcpy(dst, (void *)src, nByte);
    } else {
        mach_vm_size_t aSz;
        mach_vm_read_overwrite(mach_task_self(), src, nByte, dst, &aSz);
        if ( aSz!=nByte ) {
            return SQLITE_IOERR;
          }
      }
#else
    memcpy(dst, (void *)src, nByte);
#endif

  return SQLITE_OK;
}

int sqlite30sShmRead(sqlite3_file *id, void *dst, volatile void *src, sqlite3_int64 size);

int sqlite30sShmRead(sqlite3_file *id, void *dst, volatile void *src, sqlite3_int64 size){
#if (defined(__APPLE__) && ((!defined(TARGET_OS_EMBEDDED)||(TARGET_OS_EMBEDDED==0))))
        return unixShmRead(id, dst, src, size);
#else
    memcpy(dst, (void *)src, size);
    return SQLITE_OK;
#endif
}

#endif /* (SQLITE_ENABLE_APPLE_SPI>0) && defined(__APPLE__) */


/*
** If *pArg is inititially negative then this is a query.  Set *pArg to
** 1 or 0 depending on whether or not bit mask of pFile->ctrlFlags is set.
................................................................................
      }
      pLockstate = (LockstatePID *)pArg;
      rc = unixLockstatePid(pFile, pLockstate->pid, &(pLockstate->state));
      return rc;
    }
      
#endif /* (SQLITE_ENABLE_APPLE_SPI>0) && defined(__APPLE__) */

    case SQLITE_FCNTL_SET_NEXTFLOCKTIMEOUT: {
#ifdef SQLITE_USE_FLOCKTIMEOUT
      pFile->nextFlockTimeout = *(int*)pArg;
#endif
      return SQLITE_OK;
    }
    case SQLITE_FCNTL_GET_NEXTFLOCKTIMEOUT: {
#ifdef SQLITE_USE_FLOCKTIMEOUT
      *(int*)pArg = pFile->nextFlockTimeout;
#endif
      return SQLITE_OK;
    }

  }
  return SQLITE_NOTFOUND;
}

/*
** Return the sector size in bytes of the underlying block device for
** the specified file. This is almost always 512 bytes, but may be
................................................................................
** otherwise.
*/
static int unixShmSystemLock(
  unixShmNode *pShmNode, /* Apply locks to this open shared-memory segment */
  int lockType,          /* F_UNLCK, F_RDLCK, or F_WRLCK */
  int ofst,              /* First byte of the locking range */
  int n                  /* Number of bytes to lock */
#ifdef SQLITE_USE_FLOCKTIMEOUT
  , int timeout          /* Lock timeout in milliseconds */
#endif
){
  struct flock f;       /* The posix advisory locking structure */
  int rc = SQLITE_OK;   /* Result code form fcntl() */

  /* Access to the unixShmNode object is serialized by the caller */
  assert( sqlite3_mutex_held(pShmNode->mutex) || pShmNode->nRef==0 );

................................................................................
    /* Initialize the locking parameters */
    memset(&f, 0, sizeof(f));
    f.l_type = lockType;
    f.l_whence = SEEK_SET;
    f.l_start = ofst;
    f.l_len = n;

#ifdef SQLITE_USE_FLOCKTIMEOUT
    if( timeout>0 ){
      struct timespec ts;
      struct flocktimeout fltimeout;

      ts.tv_sec = timeout / 1000;
      ts.tv_nsec = (((long)timeout) % 1000L) * 1000000L;
      fltimeout.fl = f;
      fltimeout.timeout = ts;

      rc = osFcntl(pShmNode->h, F_SETLKWTIMEOUT, &fltimeout);
    }else{
      rc = osFcntl(pShmNode->h, F_SETLK, &f);
    }
#else
    rc = osFcntl(pShmNode->h, F_SETLK, &f);
#endif
    rc = (rc!=(-1)) ? SQLITE_OK : SQLITE_BUSY;
  }

  /* Update the global lock state and do debug tracing */
#ifdef SQLITE_DEBUG
  { u16 mask;
  OSTRACE(("SHM-LOCK "));
................................................................................
    const char *zBasePath = pDbFd->zPath;

    /* Call fstat() to figure out the permissions on the database file. If
    ** a new *-shm file is created, an attempt will be made to create it
    ** with the same permissions.
    */
    if( osFstat(pDbFd->h, &sStat) && pInode->bProcessLock==0 ){
      storeLastErrno(pDbFd, errno);
      rc = SQLITE_IOERR_FSTAT;
      goto shm_open_err;
    }

#if defined(__APPLE__) && SQLITE_ENABLE_LOCKING_STYLE
    /* If pDbFd is configured with proxy locking mode, use the local 
     ** lock file path to determine the -shm file path
................................................................................
    || defined(__APPLE__))
         || (pDbFd->openFlags & O_RDWR) != O_RDWR
#endif
         ){
        openFlags = O_RDONLY;
        pShmNode->isReadonly = 1;
      }
      int protFlags = 0;
#if SQLITE_ENABLE_DATA_PROTECTION
      protFlags = shmUnixProtectionClassForVFSProtectionFlags(pDbFd->protFlags);
#endif
      pShmNode->h = robust_open2(zShmFilename, openFlags, (sStat.st_mode&0777), protFlags, 1);

      if( pShmNode->h<0 ){
#if SQLITE_ENABLE_DATA_PROTECTION
        if( errno==EPERM ) {
          rc = unixLogError(SQLITE_AUTH, "open", zShmFilename);
        }else{
          rc = unixLogError(SQLITE_CANTOPEN_BKPT, "open", zShmFilename);
        }
#else
        rc = unixLogError(SQLITE_CANTOPEN_BKPT, "open", zShmFilename);
#endif      
        goto shm_open_err;
      }
#if SQLITE_ENABLE_DATA_PROTECTION
      if( (pDbFd->ctrlFlags&UNIXFILE_RDONLY) == 0 ){
        int shmProtFlags = (pDbFd->protFlags)&SQLITE_OPEN_FILEPROTECTION_MASK;
        
        rc = unixSetFileProtection(pShmNode->h, shmProtFlags, 1);
        if( rc ){
          if( rc==SQLITE_IOERR ){
            storeLastErrno(pDbFd, errno);
          }
          osClose(pShmNode->h);
          goto shm_open_err;
        }
      }
#endif      

      /* Check to see if another process is holding the dead-man switch.
      ** If not, truncate the file to zero length. 
      */
      rc = SQLITE_OK;
#ifdef SQLITE_USE_FLOCKTIMEOUT
      if( unixShmSystemLock(pShmNode, F_WRLCK, UNIX_SHM_DMS, 1, pDbFd->nextFlockTimeout)==SQLITE_OK ){
        pDbFd->nextFlockTimeout = 0;
#else
      if( unixShmSystemLock(pShmNode, F_WRLCK, UNIX_SHM_DMS, 1)==SQLITE_OK ){
#endif
        if( robust_ftruncate(pShmNode->h, 0) ){
          rc = unixLogError(SQLITE_IOERR_SHMOPEN, "ftruncate", zShmFilename);
        }else{
          /* If running as root set the uid/gid of the shm file to match
          ** the database */
          uid_t euid = geteuid();
          if( (!pShmNode->isReadonly) && euid==0 && (euid!=sStat.st_uid || getegid()!=sStat.st_gid) ){
................................................................................
            if( osFchown(pShmNode->h, sStat.st_uid, sStat.st_gid) ){
              rc = SQLITE_IOERR_SHMOPEN;
            }
          }
        }
      }
      if( rc==SQLITE_OK ){
#ifdef SQLITE_USE_FLOCKTIMEOUT
        rc = unixShmSystemLock(pShmNode, F_RDLCK, UNIX_SHM_DMS, 1, pDbFd->nextFlockTimeout);
        if( rc==SQLITE_OK ){
          pDbFd->nextFlockTimeout = 0;
        }
#else
        rc = unixShmSystemLock(pShmNode, F_RDLCK, UNIX_SHM_DMS, 1);
#endif
      }
      if( rc ) goto shm_open_err;
    }
  }

  /* Make the new connection a child of the unixShmNode */
  p->pShmNode = pShmNode;
................................................................................
static int unixShmMap(
  sqlite3_file *fd,               /* Handle open on database file */
  int iRegion,                    /* Region to retrieve */
  int szRegion,                   /* Size of regions */
  int bExtend,                    /* True to extend file if necessary */
  void volatile **pp              /* OUT: Mapped memory */
){
  static int oncethingie = 0;
  
  unixFile *pDbFd = (unixFile*)fd;
  unixShm *p;
  unixShmNode *pShmNode;
  int rc = SQLITE_OK;
  int nShmPerMap = unixShmRegionPerMap();
  int nReqRegion;

................................................................................
      rc = SQLITE_IOERR_NOMEM;
      goto shmpage_out;
    }
    pShmNode->apRegion = apNew;
    while( pShmNode->nRegion<nReqRegion ){
      int nMap = szRegion*nShmPerMap;
      int i;
      void *pMem = NULL;
      if( pShmNode->h>=0 ){
        pMem = osMmap(0, nMap,
            pShmNode->isReadonly ? PROT_READ : PROT_READ|PROT_WRITE, 
            MAP_SHARED, pShmNode->h, szRegion*(i64)pShmNode->nRegion
        );
        
        if( pMem==MAP_FAILED ){
          rc = unixLogError(SQLITE_IOERR_SHMMAP, "mmap", pShmNode->zFilename);
          goto shmpage_out;
        }
      }else{
        pMem = sqlite3_malloc(szRegion);
        if( pMem==0 ){
................................................................................
      if( pX==p ) continue;
      assert( (pX->exclMask & (p->exclMask|p->sharedMask))==0 );
      allMask |= pX->sharedMask;
    }

    /* Unlock the system-level locks */
    if( (mask & allMask)==0 ){
#ifdef SQLITE_USE_FLOCKTIMEOUT
      rc = unixShmSystemLock(pShmNode, F_UNLCK, ofst+UNIX_SHM_BASE, n, pDbFd->nextFlockTimeout);
      if( rc==SQLITE_OK ){
        pDbFd->nextFlockTimeout = 0;
      }
#else
      rc = unixShmSystemLock(pShmNode, F_UNLCK, ofst+UNIX_SHM_BASE, n);
#endif
    }else{
      rc = SQLITE_OK;
    }

    /* Undo the local locks */
    if( rc==SQLITE_OK ){
      p->exclMask &= ~mask;
................................................................................
    /* Find out which shared locks are already held by sibling connections.
    ** If any sibling already holds an exclusive lock, go ahead and return
    ** SQLITE_BUSY.
    */
    for(pX=pShmNode->pFirst; pX; pX=pX->pNext){
      if( (pX->exclMask & mask)!=0 ){
        rc = SQLITE_BUSY;
#ifdef SQLITE_USE_FLOCKTIMEOUT
        if( pDbFd->nextFlockTimeout>0 ){
          usleep(((int)pDbFd->nextFlockTimeout) * 1000L);
        }
#endif
        break;
      }
      allShared |= pX->sharedMask;
    }

    /* Get shared locks at the system level, if necessary */
    if( rc==SQLITE_OK ){
      if( (allShared & mask)==0 ){
#ifdef SQLITE_USE_FLOCKTIMEOUT
        rc = unixShmSystemLock(pShmNode, F_RDLCK, ofst+UNIX_SHM_BASE, n, pDbFd->nextFlockTimeout);
        if( rc==SQLITE_OK ){
          pDbFd->nextFlockTimeout = 0;
        }
#else
        rc = unixShmSystemLock(pShmNode, F_RDLCK, ofst+UNIX_SHM_BASE, n);
#endif
      }else{
        rc = SQLITE_OK;
      }
    }

    /* Get the local shared locks */
    if( rc==SQLITE_OK ){
................................................................................
  }else{
    /* Make sure no sibling connections hold locks that will block this
    ** lock.  If any do, return SQLITE_BUSY right away.
    */
    for(pX=pShmNode->pFirst; pX; pX=pX->pNext){
      if( (pX->exclMask & mask)!=0 || (pX->sharedMask & mask)!=0 ){
        rc = SQLITE_BUSY;
#ifdef SQLITE_USE_FLOCKTIMEOUT
        if( pDbFd->nextFlockTimeout>0 ){
          usleep(((int)pDbFd->nextFlockTimeout) * 1000L);
        }
#endif
        break;
      }
    }
  
    /* Get the exclusive locks at the system level.  Then if successful
    ** also mark the local connection as being locked.
    */
    if( rc==SQLITE_OK ){
#ifdef SQLITE_USE_FLOCKTIMEOUT
      rc = unixShmSystemLock(pShmNode, F_WRLCK, ofst+UNIX_SHM_BASE, n, pDbFd->nextFlockTimeout);
      if( rc==SQLITE_OK ){
        pDbFd->nextFlockTimeout = 0;
#else
      rc = unixShmSystemLock(pShmNode, F_WRLCK, ofst+UNIX_SHM_BASE, n);
      if( rc==SQLITE_OK ){
#endif
        assert( (p->sharedMask & mask)==0 );
        p->exclMask |= mask;
      }
    }
  }
  sqlite3_mutex_leave(pShmNode->mutex);
  OSTRACE(("SHM-LOCK shmid-%d, pid-%d got %03x,%03x\n",
................................................................................
** All loads and stores begun before the barrier must complete before
** any load or store begun after the barrier.
*/
static void unixShmBarrier(
  sqlite3_file *fd                /* Database file holding the shared memory */
){
  UNUSED_PARAMETER(fd);
#if defined(__APPLE__)
  OSMemoryBarrier();
#else
  unixEnterMutex();
  unixLeaveMutex();
#endif
}

/*
** Close a connection to shared-memory.  Delete the underlying 
** storage if deleteFlag is true.
**
** If there is no shared memory associated with the connection then this
................................................................................
#endif /* #ifndef SQLITE_OMIT_WAL */

#if (SQLITE_ENABLE_APPLE_SPI>0) && defined(__APPLE__)
static const char *unixTempFileDir(void);

static int unixInvalidateSupportFiles(unixFile *pFile, int skipWAL) {
  char jPath[MAXPATHLEN+9];
  int zLen = (int)strlcpy(jPath, pFile->zPath, MAXPATHLEN+9);
  if( zLen<MAXPATHLEN ){
    size_t jLen;
    const char extensions[3][9] = { "-wal", "-journal", "-shm" };
    int j = (skipWAL ? 1 : 0);
    for( ; j<3; j++ ){
      int isShm = 0;
      
      /* Check to see if the shm file is already opened for this pFile */
      if( j==2 ){
        isShm = 1;
        
        unixEnterMutex(); /* Because pFile->pInode is shared across threads */
        unixShmNode *pShmNode = pFile->pInode->pShmNode;
        if( pShmNode && !pShmNode->isReadonly ){
          struct stat sStat;
          sqlite3_mutex_enter(pShmNode->mutex);
          
          if( pShmNode->h>=0 && !osFstat(pShmNode->h, &sStat) ){
................................................................................
          sqlite3_mutex_leave(pShmNode->mutex);
        }
        unixLeaveMutex();
      }
      jLen = strlcpy(&jPath[zLen], extensions[j], 9);
      if( jLen < 9 ){
        int jflags = (j<2) ? O_TRUNC : O_RDWR;
        int jfd = robust_open2(jPath, jflags, 0, 0, isShm);
        if( jfd==(-1) ){
          if( errno!=ENOENT ){
            perror(jPath);
          }
        } else {
          if( j==2 ){
            struct stat sStat;
            if( !osFstat(jfd, &sStat) ){
              unsigned long size = (sStat.st_size<4) ? sStat.st_size : 4;
              if( size>0 ){
                uint32_t zero = 0;
                
                os_rawPwrite(jfd, &zero, (size_t)size, 0);
              }
            }
          }
          fsync(jfd);
          osClose(jfd);
        }
      }
    }
  }
  return SQLITE_OK;
}

................................................................................
    result = errno;
  }
  if (result) {
    rc = SQLITE_IOERR;
    storeLastErrno(pFile, result);
  }
  
  int fd2 = robust_open2(journalPath, O_RDWR, 0, 0, 0);
  int result2 = 0;
  if (fd2 < 0) {
    if (errno != ENOENT) {
      result2 = errno;
    } else {
      result2 = 0;
    }
................................................................................
    }
  }
  if (result2 && !result) {
    rc = SQLITE_IOERR;
    storeLastErrno(pFile, result2);
  }
  
  int fd3 = robust_open2(walPath, O_RDWR, 0, 0, 0);
  int result3 = 0;
  if (fd3 < 0) {
    if (errno != ENOENT) {
      result3 = errno;
    } else {
      result3 = 0;
    }
................................................................................
  if (result3 && !(result || result2)) {
    rc = SQLITE_IOERR;
    storeLastErrno(pFile, result2);
  }
  
  if (fd3 >= 0) {
    fsync(fd3);
    osClose(fd3);
  }
  if (fd2 >= 0) {
    fsync(fd2);
    osClose(fd2);
  }

  
  pFile->pMethod->xSync((sqlite3_file*)pFile, SQLITE_SYNC_FULL);
	
  return rc;
}

static int unixTruncateDatabase(unixFile *pFile, int bFlags) {
  sqlite3_file *id = (sqlite3_file *)pFile;
  int rc = SQLITE_OK;
  Superlock *pLock = NULL;
  int flags = 0;
  int corruptFileLock = 0;
  int isCorrupt = 0;
  int isWal = (bFlags & SQLITE_TRUNCATE_JOURNALMODE_WAL);
  int force = (bFlags & SQLITE_TRUNCATE_FORCE);
  int safeFailed = 0;

#if SQLITE_ENABLE_DATA_PROTECTION
  flags |= pFile->protFlags;
#endif
#if SQLITE_ENABLE_LOCKING_STYLE
  if( isProxyLockingMode(pFile) ){
    flags |= SQLITE_OPEN_AUTOPROXY;
  }
#endif

  const char *tDir = NULL;
  int tDirLen = 0;

  if( (bFlags&SQLITE_TRUNCATE_INITIALIZE_HEADER_MASK)!=0 ){
    tDir = unixTempFileDir();
    tDirLen = tDir ? (int)strlen(tDir) : 0;
    if (tDirLen < 1) {
      _open_error_asl_log();
      asl_log(errorlog_client, NULL, ASL_LEVEL_CRIT, "SQLite: truncate database failed because TMPDIR is not set correctly\n");

      return SQLITE_PERM;
    }
  }
  
  rc = sqlite3demo_superlock(pFile->zPath, 0, flags, 0, 0, (void**)&pLock);
  if( rc ){
    if( rc==SQLITE_CORRUPT || rc==SQLITE_NOTADB ){
      isCorrupt = 1;
      rc = sqlite3demo_superlock_corrupt(id, SQLITE_LOCK_EXCLUSIVE,
                                         &corruptFileLock);
    }
    if( rc && !force ){
      return rc;
    }
    if (!isWal) {
      isWal = (1 == readWALSettingFromFile(pFile));
    }
    rc = SQLITE_OK; /* Ignore the locking failure if force is true */
  } else if (!isWal && (pLock != NULL)) {
    isWal = pLock->bWal;
  }
  
  if( (bFlags&SQLITE_TRUNCATE_INITIALIZE_HEADER_MASK)!=0 ){
    /* initialize a new database in TMPDIR and copy the contents over */


    int tLen = sizeof(char) * (tDirLen + 26);
    char *tDbPath = (char *)calloc(1, tLen);
    int tFd = -1;
    
    strlcpy(tDbPath, tDir, tLen);
    /* create a temporary database with the prefix tmpsqlitetruncatedb */
    if( tDbPath[(tDirLen-1)] != '/' ){
      strlcat(tDbPath, "/", tLen);


    }
    strlcat(tDbPath, "tmpsqlitetruncatedbXXXXXX", tLen);
    tFd = mkstemp(tDbPath);
    if( tFd==-1 ){
      storeLastErrno(pFile, errno);
      rc = SQLITE_IOERR;
      safeFailed = 1;
    }else{
      sqlite3 *tDb = NULL;
................................................................................
      }
      if( tDb ){
        int off = 0;
        /* merge the wal into the db */
        sqlite3_file_control(tDb, NULL, SQLITE_FCNTL_PERSIST_WAL, &off);
        sqlite3_close(tDb);
      }

      s = copyfile_state_alloc();
      lseek(tFd, 0, SEEK_SET);
      lseek(pFile->h, 0, SEEK_SET);
      if( sqlite_guarded_fcopyfile(tFd, pFile->h) != 0 ){
        int err=errno;
        switch(err) {
          case ENOMEM:
            trc = SQLITE_NOMEM;
            break;
          default:
            storeLastErrno(pFile, err);
            trc = SQLITE_IOERR;
        }
      }
      copyfile_state_free(s);
      fsync(pFile->h);
      /* tFd is created with mkstemp, can't use guarded close() */
      close(tFd);
      unlink(tDbPath);
      if( trc!=SQLITE_OK ){
        safeFailed = 1;
        rc = trc;
      }
    }
    if (tDbPath) {
      free(tDbPath);
    }
  } else {
    rc = pFile->pMethod->xTruncate(id, 
           ((pFile->fsFlags & SQLITE_FSFLAGS_IS_MSDOS) != 0) ? 1L : 0L);
    if( rc ){
      safeFailed = 1;
    }
  }
................................................................................
    assert(force);
  }
  
  if( force && safeFailed){
    rc = unixUnsafeTruncateDatabase(pFile);
  }
  
  if (rc) {
    _open_error_asl_log();
    const char* dstPath = pFile ? pFile->zPath : "<dst db null>";
    
    if (dstPath == NULL) {
      dstPath = "<dst path null>";
    }

    asl_log(errorlog_client, NULL, ASL_LEVEL_ERR, "SQLite: unixTruncateDatabase() failed with %d for replacing '%s' with flags %x\n", rc, dstPath, flags);
  }

  return rc;
}

/*
 ** Lock locations for shared-memory locks used by WAL mode.
 */
#ifndef SHM_BASE
................................................................................
*/
static int unixLockstatePid(unixFile *pFile, pid_t pid, int *pLockstate){
  int hDb;        /* File descriptor for the open database file */
  int hShm = -1;  /* File descriptor for WAL shared-memory file */
  ssize_t got;    /* Bytes read from header */
  int isWal = 0;             /* True if in WAL mode */
  int nLock = 0;             /* Number of locks held */
  int npLock = 0;            /* Number of potential locks held */
  int noHdr = 0;             /* Zero byte DB has no header */
  unsigned char aHdr[100];   /* Database header */
  
  assert(pLockstate);
  
  /* make sure we are dealing with a database file */
  hDb = pFile->h;
  if( hDb<0 ){
    *pLockstate = SQLITE_LOCKSTATE_ERROR;
    return SQLITE_ERROR;
  }
  
  /* First check for an exclusive lock */
  nLock += unixIsLocked(pid, hDb, F_RDLCK, SHARED_FIRST, SHARED_SIZE,
                        "EXCLUSIVE");
  npLock += unixIsLocked(pid, hDb, F_WRLCK, PENDING_BYTE, SHARED_SIZE+2,
                        "PENDING|RESERVED|SHARED");
  if( nLock==0 && npLock==0 ){
    *pLockstate = SQLITE_LOCKSTATE_OFF;
    return SQLITE_OK;
  }
  
  assert( (strlen(SQLITE_FILE_HEADER)+1)==SQLITE_FILE_HEADER_LEN );
  got = pread(hDb, aHdr, 100, 0);
  if( got<0 ){
    *pLockstate = SQLITE_LOCKSTATE_ERROR;
    return SQLITE_ERROR;
  }
  if( got==0 ){
................................................................................
  }else if( got!=100
         || memcmp(aHdr, SQLITE_FILE_HEADER, SQLITE_FILE_HEADER_LEN)!=0
  ){
    *pLockstate = SQLITE_LOCKSTATE_NOTADB;
    return SQLITE_NOTADB;
  }
  



  if (!noHdr) {
    isWal = aHdr[18]==2;
  }
  if( nLock==0 && isWal==0 ){
    /* Rollback mode */
    nLock += npLock;

  }
  if( nLock==0 && isWal!=0 ){
    /* lookup the file descriptor for the shared memory file if we have it open
    ** in this process */
    unixEnterMutex(); /* Because pFile->pInode is shared across threads */
    unixShmNode *pShmNode = pFile->pInode->pShmNode;
    if( pShmNode ){
................................................................................
      /* the shared memory file isn't open in this process space, open our
      ** own FD */
      char zShm[MAXPATHLEN];
      
      /* WAL mode */
      strlcpy(zShm, pFile->zPath, MAXPATHLEN);
      strlcat(zShm, "-shm", MAXPATHLEN);
      hShm = robust_open2(zShm, O_RDONLY, 0, 0, 1);
      if( hShm<0 ){
        *pLockstate = SQLITE_LOCKSTATE_OFF;
        unixLeaveMutex();
        return SQLITE_OK;
      }
      if( unixIsLocked(pid, hShm, F_RDLCK, SHM_RECOVER, 1, "WAL-RECOVERY") ||
         unixIsLocked(pid, hShm, F_RDLCK, SHM_WRITE, 1, "WAL-WRITE") ){
        nLock = 1;
      }
      osClose(hShm);
    }
    unixLeaveMutex();
  }
  if( nLock>0 ){
    *pLockstate = SQLITE_LOCKSTATE_ON;
  } else {
    *pLockstate = SQLITE_LOCKSTATE_OFF;
................................................................................
     0,
     0,
     "/var/tmp",
     "/usr/tmp",
     "/tmp",
     0        /* List terminator */
  };
  
  unsigned int i;
  struct stat buf;
  const char *zDir = 0;

  azDirs[0] = sqlite3_temp_directory;
  if( !azDirs[1] ) azDirs[1] = getenv("SQLITE_TMPDIR");
  if( !azDirs[2] ){
#if defined(__APPLE__)
    char *path = malloc(PATH_MAX);
    size_t pathLen = 0;
    path[0] = '\0';
    pathLen = confstr(_CS_DARWIN_USER_TEMP_DIR, path, PATH_MAX);
    if (pathLen > 0) {
      azDirs[2] = path;
    } else {
      free(path);
      path = NULL;
    }
#else
    azDirs[2] = getenv("TMPDIR");
#endif
  }
  for(i=0; i<sizeof(azDirs)/sizeof(azDirs[0]); zDir=azDirs[i++]){
    if( zDir==0 ) continue;
    if( osStat(zDir, &buf) ) continue;
    if( !S_ISDIR(buf.st_mode) ) continue;
    if( osAccess(zDir, R_OK|W_OK|X_OK) ) continue;
    break;
  }
  
  if (!zDir) {
    _open_error_asl_log();
    asl_log(errorlog_client, NULL, ASL_LEVEL_CRIT, "SQLite: No temporary directory is accessible.  This is not a legitimate configuration.  Either the process environment or its sandbox is misconfigured.  Various library routines will error out abruptly.\n");
  }
  return zDir;
}

/*
** Create a temporary file name in zBuf.  zBuf must be allocated
** by the calling process and must be big enough to hold at least
** pVfs->mxPathname bytes.
................................................................................
    }
  }else if( flags & SQLITE_OPEN_DELETEONCLOSE ){
    *pMode = 0600;
  }
  return rc;
}

  
#if defined(__APPLE__)
  
static int _copyUserHomeDirectory(char* userhomedirectory, int bufferSize) {
  uid_t euid;
  gid_t gid;
  
  if (0 != pthread_getugid_np(&euid, &gid)) {
    euid = 0;
  }

  int bufsize;
  if ((bufsize = sysconf(_SC_GETPW_R_SIZE_MAX)) == -1) {
      return 0;
  }
  char buffer[bufsize];
  struct passwd upwd, *result = NULL;
    
  if (getpwuid_r((euid ? euid : getuid()), &upwd, buffer, bufsize, &result) != 0 || !result) {
      return 0;
  }

  const char *homePath = NULL;
    
  if (upwd.pw_dir && (strlen(upwd.pw_dir)) > 0) {
    homePath = upwd.pw_dir;
  }
  if (!homePath) {
    char* t = getenv("HOME");
    if (t && (strlen(t) > 0)) {
      homePath = t;
    }
  }

  if (homePath) {
    strlcpy(userhomedirectory, homePath, bufferSize);
    return 1;
  }
  
  return 0;
}
  
  
static int _canSafelyMapFileDescriptor(struct statfs *fs) {
#if (!defined(TARGET_OS_EMBEDDED)||(TARGET_OS_EMBEDDED==0))
  static int userhomedirinited = 0;
  static fsid_t *userhomedirid = NULL;
  static fsid_t underlyinghomedirid;
  static OSSpinLock underlyinghomelock = OS_SPINLOCK_INIT;
  
  //Network volumes are never safe to mmap
  int isNetworkVolume = (MNT_LOCAL != (fs->f_flags & MNT_LOCAL));
  if (isNetworkVolume) {
    return 0;
  }
  
  //The root volume shouldn't be removeable
  int isRootVolume = (MNT_ROOTFS == (fs->f_flags & MNT_ROOTFS));
  if (isRootVolume) {
    return 1;
  }

  OSMemoryBarrier();
  if (userhomedirinited == 0) {
    OSSpinLockLock(&underlyinghomelock);
    
    char apath[MAXPATHLEN+1];
    bzero(apath, MAXPATHLEN+1);

    if (getuid() != 0) {
      if (0 != _copyUserHomeDirectory(apath, MAXPATHLEN)) {
        if (strlen(apath) > 0) {
          struct statfs userfs;
          
          if (statfs(apath, &userfs) == 0) {
            if (0 != (userfs.f_flags & MNT_LOCAL)) {
              fsid_t tests;
              bzero(&tests, sizeof(fsid_t));

              if (memcmp(&tests, &(userfs.f_fsid), sizeof(fsid_t)) != 0) {
                memcpy(&underlyinghomedirid, &(userfs.f_fsid), sizeof(fsid_t));
                
                // if the user is not root, their home directory is local and the f_fsid field is accessible
                userhomedirid = &underlyinghomedirid;
              }
            }
          }
        }
      }
    }
    
    userhomedirinited = 1;

    OSSpinLockUnlock(&underlyinghomelock);
  }
  
  if (userhomedirid != NULL) {
    if (memcmp(userhomedirid, &(fs->f_fsid), sizeof(fsid_t)) == 0) {
      return 1;
    }
  }
  return 0;
#else
  return 1;
#endif
  }
#endif
  
/*
** Open the file zPath.
** 
** Previously, the SQLite OS layer used three functions in place of this
** one:
**
**     sqlite3OsOpenReadWrite();
................................................................................
  int eType = flags&0xFF0FFF00;  /* Type of file to open */
#else
  int eType = flags&0xFFFFFF00;  /* Type of file to open */
#endif
  int noLock;                    /* True to omit locking primitives */
  int rc = SQLITE_OK;            /* Function Return Code */
  int ctrlFlags = 0;             /* UNIXFILE_* flags */
  int protClass = 0;

  int isExclusive  = (flags & SQLITE_OPEN_EXCLUSIVE);
  int isDelete     = (flags & SQLITE_OPEN_DELETEONCLOSE);
  int isCreate     = (flags & SQLITE_OPEN_CREATE);
  int isReadonly   = (flags & SQLITE_OPEN_READONLY);
  int isReadWrite  = (flags & SQLITE_OPEN_READWRITE);
#if SQLITE_ENABLE_LOCKING_STYLE
  int isAutoProxy  = (flags & SQLITE_OPEN_AUTOPROXY);
#endif
#if defined(__APPLE__) || SQLITE_ENABLE_LOCKING_STYLE
  struct statfs fsInfo;
#endif
  
  int isShm = 0;
  
  /* If creating a master or main-file journal, this function will open
  ** a file-descriptor on the directory too. The first time unixSync()
  ** is called the directory file descriptor will be fsync()ed and close()d.
  */
  int syncDir = (isCreate && (
        eType==SQLITE_OPEN_MASTER_JOURNAL 
     || eType==SQLITE_OPEN_MAIN_JOURNAL 
................................................................................
  if( isReadWrite ) openFlags |= O_RDWR;
  if( isCreate )    openFlags |= O_CREAT;
  if( isExclusive ) openFlags |= (O_EXCL|O_NOFOLLOW);
  openFlags |= (O_LARGEFILE|O_BINARY);

#if SQLITE_ENABLE_DATA_PROTECTION
  p->protFlags = (flags & SQLITE_OPEN_FILEPROTECTION_MASK);
  protClass = (!isShm) ? unixProtectionClassForVFSProtectionFlags((flags & SQLITE_OPEN_FILEPROTECTION_MASK)) : shmUnixProtectionClassForVFSProtectionFlags((flags & SQLITE_OPEN_FILEPROTECTION_MASK));
#endif
    
  if( fd<0 ){
    mode_t openMode;              /* Permissions to create file with */
    uid_t uid;                    /* Userid for the file */
    gid_t gid;                    /* Groupid for the file */
    rc = findCreateFileMode(zName, flags, &openMode, &uid, &gid);
    if( rc!=SQLITE_OK ){
      assert( !p->pUnused );
      assert( eType==SQLITE_OPEN_WAL || eType==SQLITE_OPEN_MAIN_JOURNAL );
      return rc;
    }
    fd = robust_open2(zName, openFlags, openMode, protClass, isShm);
    OSTRACE(("OPENX   %-3d %s 0%o\n", fd, zName, openFlags));
    if( fd<0 && errno!=EISDIR && isReadWrite && !isExclusive ){
      /* Failed to open the file for read/write access. Try read-only. */
      flags &= ~(SQLITE_OPEN_READWRITE|SQLITE_OPEN_CREATE);
      openFlags &= ~(O_RDWR|O_CREAT);
      flags |= SQLITE_OPEN_READONLY;
      openFlags |= O_RDONLY;
      isReadonly = 1;
      fd = robust_open2(zName, openFlags, openMode, protClass, isShm);
    }
    if( fd<0 ){
#if SQLITE_ENABLE_DATA_PROTECTION
      if( errno==EPERM ){
        /* <rdar://problem/9385939> Test device locked state when error reporting for content protection issues */
        rc = unixLogError(SQLITE_AUTH, "open", zName);
      }else{
        rc = unixLogError(SQLITE_CANTOPEN_BKPT, "open", zName);
      }
#else
      rc = unixLogError(SQLITE_CANTOPEN_BKPT, "open", zName);
#endif
      goto open_finished;
    }

    /* if we're opening the wal or journal and running as root, set the
    ** journal uid/gid */
    if( !isReadonly && (flags & (SQLITE_OPEN_WAL|SQLITE_OPEN_MAIN_JOURNAL)) ){
      uid_t euid = geteuid();
................................................................................
        if( osFchown(fd, uid, gid) ){
          rc = SQLITE_CANTOPEN_BKPT;
          goto open_finished;
        }
      }
    }
  }
#if SQLITE_ENABLE_DATA_PROTECTION
  if( !isReadonly ){
    rc = unixSetFileProtection(fd, p->protFlags, isShm);
    if( rc ){
      if( rc!=SQLITE_AUTH ){
        rc =SQLITE_CANTOPEN_BKPT;
      }
      osClose(fd);
      goto open_finished;
    }
  }
#endif
  assert( fd>=0 );
  if( pOutFlags ){
    *pOutFlags = flags;
  }

  if( p->pUnused ){
    p->pUnused->fd = fd;
................................................................................
  }
  if (0 == strncmp("msdos", fsInfo.f_fstypename, 5)) {
    ((unixFile*)pFile)->fsFlags |= SQLITE_FSFLAGS_IS_MSDOS;
  }
  if (0 == strncmp("exfat", fsInfo.f_fstypename, 5)) {
    ((unixFile*)pFile)->fsFlags |= SQLITE_FSFLAGS_IS_MSDOS;
  }
  if (fsInfo.f_flags & MNT_ROOTFS) {
    ((unixFile*)pFile)->fsFlags |= SQLITE_FSFLAGS_IS_MMAP_SAFE;
  } else {
#if defined(__APPLE__)
    if (_canSafelyMapFileDescriptor(&fsInfo)) {
      ((unixFile*)pFile)->fsFlags |= SQLITE_FSFLAGS_IS_MMAP_SAFE;
    }
#endif
  }
#if defined(__APPLE__)
  /* <rdar://problem/17742712> */
  ((unixFile*)pFile)->nFsBytes = (i64)fsInfo.f_blocks * (i64)fsInfo.f_bsize;
#endif
#endif

  /* Set up appropriate ctrlFlags */
  if( isDelete )                ctrlFlags |= UNIXFILE_DELETE;
  if( isReadonly )              ctrlFlags |= UNIXFILE_RDONLY;
  if( noLock )                  ctrlFlags |= UNIXFILE_NOLOCK;
  if( syncDir )                 ctrlFlags |= UNIXFILE_DIRSYNC;
................................................................................
    int useProxy = 0;

    /* SQLITE_FORCE_PROXY_LOCKING==1 means force always use proxy, 0 means 
    ** never use proxy, NULL means use proxy for non-local files only.  */
    if( envforce!=NULL ){
      useProxy = atoi(envforce)>0;
    }else{
      useProxy = !((fsInfo.f_flags&MNT_LOCAL) || (fsInfo.f_flags&MNT_RDONLY));
    }
    if( useProxy ){
      rc = fillInUnixFile(pVfs, fd, pFile, zPath, ctrlFlags);
      if( rc==SQLITE_OK ){
        /* cache the pMethod in case the transform fails */
        const struct sqlite3_io_methods *pMethod = pFile->pMethods;
        rc = proxyTransformUnixFile((unixFile*)pFile, ":auto:");
................................................................................
#else
      if( fsync(fd) )
#endif
      {
        rc = unixLogError(SQLITE_IOERR_DIR_FSYNC, "fsync", zPath);
      }
#if OSCLOSE_CHECK_CLOSE_IOERR
      if( osClose(fd)&&!rc ){
        rc = SQLITE_IOERR_DIR_CLOSE;
      }
#else
      robust_close(0, fd, __LINE__);
#endif
    }else if( rc==SQLITE_CANTOPEN ){
      rc = SQLITE_OK;
................................................................................


#ifndef SQLITE_OMIT_LOAD_EXTENSION
/*
** Interfaces for opening a shared library, finding entry points
** within the shared library, and closing the shared library.
*/
#include <dlfcn.h> /* amalgamator: keep */
static void *unixDlOpen(sqlite3_vfs *NotUsed, const char *zFilename){
  UNUSED_PARAMETER(NotUsed);
  return dlopen(zFilename, RTLD_NOW | RTLD_GLOBAL);
}

/*
** SQLite calls this function immediately after a call to unixDlSym() or
................................................................................
  ** tests repeatable.
  */
  memset(zBuf, 0, nBuf);
  randomnessPid = getpid();  
#if !defined(SQLITE_TEST)
  {
    int fd, got;
    fd = robust_open("/dev/urandom", O_RDONLY, 0, 0);
    if( fd<0 ){
      time_t t;
      time(&t);
      memcpy(zBuf, &t, sizeof(t));
      memcpy(&zBuf[sizeof(t)], &randomnessPid, sizeof(randomnessPid));
      assert( sizeof(t)+sizeof(randomnessPid)<=(size_t)nBuf );
      nBuf = sizeof(t) + sizeof(randomnessPid);
    }else{
      do{ got = (int)osRead(fd, zBuf, nBuf); }while( got<0 && errno==EINTR );
      robust_close(0, fd, __LINE__);
    }
  }
#endif
  return nBuf;
}

................................................................................
};

/* 
** The proxy lock file path for the database at dbPath is written into lPath, 
** which must point to valid, writable memory large enough for a maxLen length
** file path. 
*/
static int proxyGetLockPath(const char *dbPath, char *lockPath, size_t maxLen){
  int len;
  int dbLen;
  int i;

  int tooBig;
  int nameMax;
#ifdef LOCKPROXYDIR
  len = strlcpy(lockPath, LOCKPROXYDIR, maxLen);
#else
# ifdef _CS_DARWIN_USER_TEMP_DIR
  {
    if( !confstr(_CS_DARWIN_USER_TEMP_DIR, lockPath, maxLen) ){
      OSTRACE(("GETLOCKPATH  failed %s errno=%d pid=%d\n",
               lockPath, errno, getpid()));
      return SQLITE_IOERR_LOCK;
    }
    len = (int)strlcat(lockPath, "sqliteplocks", maxLen);
  }
# else
  len = strlcpy(lockPath, "/tmp/", maxLen);
# endif
#endif

  if( lockPath[len-1]!='/' ){
    len = (int)strlcat(lockPath, "/", maxLen);
  }
    
  /* 
  ** transform the db path to a unique cache name.
  ** By default this simply turns '/'s into '_'s,
  ** but if the resulting path would exceed maxLen, hash the
  ** path and create a subpath like:
  **   <SHA-256 hash>-<database filename>:auto:
  */
  dbLen = (int)strlen(dbPath);
  tooBig = ( (dbLen+len+7) > maxLen ) ? 1 : 0;
#if defined(NAME_MAX)
  nameMax = NAME_MAX;
#else
  nameMax = 255;
#endif
  
#if defined(__APPLE__)
  if( tooBig || (nameMax<(dbLen+7)) ){
    CC_SHA256_CTX ctx;
    unsigned char shabytes[CC_SHA256_DIGEST_LENGTH];
    char shahex[CC_SHA256_DIGEST_LENGTH * 2 + 2];
    
    CC_SHA256_Init (&ctx);
    CC_SHA256_Update (&ctx, dbPath, dbLen);
    CC_SHA256_Final (shabytes, &ctx);
    
    /* render the hash into the path as chars [0-9][a-f] */
    for( i=0; i<CC_SHA256_DIGEST_LENGTH; i++ ){
      unsigned char byte = shabytes[i];
      shahex[i*2] = '0' + (byte >> 4);
      if (shahex[i*2] > '9'){
        shahex[i*2] += 'a' - '9' - 1;
      }
      shahex[i*2+1] = '0' + (byte & 0xf);
      if (shahex[i*2+1] > '9'){
        shahex[i*2+1] += 'a' - '9' - 1;
      }
    }
    shahex[CC_SHA256_DIGEST_LENGTH * 2] = '-';
    shahex[CC_SHA256_DIGEST_LENGTH * 2 + 1] = 0;
    
    strlcat(lockPath, shahex, maxLen);
    
    /* tack on the actual database name for discoverability */
    const char *dbName = strrchr (dbPath, '/');
    if (!dbName){
      dbName = dbPath;
    }else{
      ++dbName;
    }
    
    strlcat(lockPath, dbName, maxLen);
  }else{
#endif
    int pos = len;
    for( i=0; i<dbLen; i++){
      char c = dbPath[i];
      /* collapse "./" and "/./" patterns */
      if( (dbLen>(i+2)) && (dbPath[i]=='.') && (dbPath[i+1]=='/') &&
         ((i==0) || dbPath[i-1]=='/') ){
        i ++; /* skips 2 */
        continue;
      }
      
      lockPath[pos] = (c=='/')?'_':c;
      pos++;
    }
    lockPath[pos]='\0';
#if defined(__APPLE__)
  }
#endif
  strlcat(lockPath, ":auto:", maxLen);
  OSTRACE(("GETLOCKPATH  proxy lock path=%s pid=%d\n", lockPath, getpid()));
  return SQLITE_OK;
}

/* 
 ** Creates the lock file and any missing directories in lockPath
 */
static int proxyCreateLockPath(const char *lockPath){
................................................................................
  proxyLockingContext *pCtx;
  unixFile *pLockFile;
  
  assert(pFile!=NULL && pFile->lockingContext!=NULL);
  assert(pFile->pMethod == &proxyIoMethods);
  pCtx = ((proxyLockingContext *)(pFile->lockingContext));
  pLockFile = pCtx->lockProxy;
  
  if (pLockFile) {
    if( pLockFile->pMethod->iVersion>=2 && pLockFile->pMethod->xShmMap!=0 ){
      return pCtx->lockProxyPath;
    }
  }

  return NULL;
}
#endif

/*
** Create a new VFS file descriptor (stored in memory obtained from
** sqlite3_malloc) and open the file named "path" in the file descriptor.
................................................................................
    unixFile **ppFile,       /* unixFile created and returned by ref */
    int islockfile           /* if non zero missing dirs will be created */
) {
  int fd = -1;
  unixFile *pNew;
  int rc = SQLITE_OK;
  int openFlags = O_RDWR | O_CREAT;
  int sqliteFlags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE;
  sqlite3_vfs dummyVfs;
  int terrno = 0;
  UnixUnusedFd *pUnused = NULL;

  /* 1. first try to open/create the file
  ** 2. if that fails, and this is a lock file (not-conch), try creating
  ** the parent directories and then try again.
  ** 3. if that fails, try to open the file read-only
  ** otherwise return BUSY (if lock file) or CANTOPEN for the conch file
  */
  pUnused = findReusableFd(path, sqliteFlags);
  if( pUnused ){
    fd = pUnused->fd;
  }else{
    pUnused = sqlite3_malloc(sizeof(*pUnused));
    if( !pUnused ){
      return SQLITE_NOMEM;
    }
  }
  if( fd<0 ){
    fd = robust_open2(path, openFlags, 0, 0,0);
    terrno = errno;
    if( fd<0 && errno==ENOENT && islockfile ){
      if( proxyCreateLockPath(path) == SQLITE_OK ){
        fd = robust_open2(path, openFlags, 0, 0, 0);
      }
    }
  }
  if( fd<0 ){
    openFlags = O_RDONLY;
    sqliteFlags = SQLITE_OPEN_READONLY;
    fd = robust_open2(path, openFlags, 0, 0, 0);
    terrno = errno;
  }
  if( fd<0 ){
    sqlite3_free(pUnused);
    if( islockfile ){
      return SQLITE_BUSY;
    }
................................................................................
  }
  memset(pNew, 0, sizeof(unixFile));
  pNew->openFlags = openFlags;
  memset(&dummyVfs, 0, sizeof(dummyVfs));
  dummyVfs.pAppData = (void*)&autolockIoFinder;
  dummyVfs.zName = "dummy";
  pUnused->fd = fd;
  pUnused->flags = sqliteFlags;
  pNew->pUnused = pUnused;
  
  rc = fillInUnixFile(&dummyVfs, fd, (sqlite3_file*)pNew, path, 0);
  if( rc==SQLITE_OK ){
    *ppFile = pNew;
    return SQLITE_OK;
  }
................................................................................
#ifdef SQLITE_TEST
/* simulate multiple hosts by creating unique hostid file paths */
int sqlite3_hostid_num = 0;
#endif

#define PROXY_HOSTIDLEN    16  /* conch file host id length */

#if HAVE_GETHOSTUUID
/* Not always defined in the headers as it ought to be */
extern int gethostuuid(uuid_t id, const struct timespec *wait);
#endif
  
/* get the host ID via gethostuuid(), pHostID must point to PROXY_HOSTIDLEN 
** bytes of writable memory.
*/
static int proxyGetHostID(unsigned char *pHostID, int *pError){
  assert(PROXY_HOSTIDLEN == sizeof(uuid_t));
  memset(pHostID, 0, PROXY_HOSTIDLEN);
#if HAVE_GETHOSTUUID
................................................................................
  /* read the conch content */
  readLen = osPread(conchFile->h, buf, PROXY_MAXCONCHLEN, 0);
  if( readLen<PROXY_PATHINDEX ){
    sqlite3_snprintf(sizeof(errmsg),errmsg,"read error (len %d)",(int)readLen);
    goto end_breaklock;
  }
  /* write it out to the temporary break file */
  fd = robust_open2(tPath, (O_RDWR|O_CREAT|O_EXCL), 0, 0, 0);
  if( fd<0 ){
    sqlite3_snprintf(sizeof(errmsg), errmsg, "create failed (%d)", errno);
    goto end_breaklock;
  }
  if( osPwrite(fd, buf, readLen, 0) != (ssize_t)readLen ){
    sqlite3_snprintf(sizeof(errmsg), errmsg, "write failed (%d)", errno);
    goto end_breaklock;
................................................................................
      if( conchModTime.tv_sec != buf.st_mtimespec.tv_sec || 
         conchModTime.tv_nsec != buf.st_mtimespec.tv_nsec ){
        return SQLITE_BUSY;
      }
      
      if( pCtx->nFails==2 ){  
        char tBuf[PROXY_MAXCONCHLEN];
        int len = (int)osPread(conchFile->h, tBuf, PROXY_MAXCONCHLEN, 0);
        if( len<0 ){
          storeLastErrno(pFile, errno);
          return SQLITE_IOERR_LOCK;
        }
        if( len>PROXY_PATHINDEX && tBuf[0]==(char)PROXY_CONCHVERSION){
          /* don't break the lock if the host id doesn't match, but do log
           * an error to console so users can diagnose stale NFS locks more 
................................................................................
      ** stick.
      */
      futimes(conchFile->h, NULL);
      if( hostIdMatch && !createConch ){
        if( conchFile->pInode && conchFile->pInode->nShared>1 ){
          /* We are trying for an exclusive lock but another thread in this
           ** same process is still holding a shared lock. */
#ifdef SQLITE_USE_FLOCKTIMEOUT
          if( pFile->nextFlockTimeout>0 ){
            usleep(((int)pFile->nextFlockTimeout) * 1000L);
          }
#endif
          rc = SQLITE_BUSY;
        } else {          
          rc = proxyConchLock(pFile, myHostID, EXCLUSIVE_LOCK);
        }
      }else{
        rc = proxyConchLock(pFile, myHostID, EXCLUSIVE_LOCK);
      }
................................................................................
        memcpy(&writeBuffer[PROXY_HEADERLEN], myHostID, PROXY_HOSTIDLEN);
        if( pCtx->lockProxyPath!=NULL ){
          strlcpy(&writeBuffer[PROXY_PATHINDEX], pCtx->lockProxyPath,
                  MAXPATHLEN);
        }else{
          strlcpy(&writeBuffer[PROXY_PATHINDEX], tempLockPath, MAXPATHLEN);
        }
        writeSize = PROXY_PATHINDEX + (int)strlen(&writeBuffer[PROXY_PATHINDEX]);
        robust_ftruncate(conchFile->h, writeSize);
        rc = unixWrite((sqlite3_file *)conchFile, writeBuffer, writeSize, 0);
        fsync(conchFile->h);
        /* If we created a new conch file (not just updated the contents of a 
         ** valid conch file), try to match the permissions of the database 
         */
        if( rc==SQLITE_OK && createConch ){
................................................................................
      
    end_takeconch:
      OSTRACE(("TRANSPROXY: CLOSE  %d\n", pFile->h));
      if( rc==SQLITE_OK && pFile->openFlags ){
        int fd;
        if( pFile->h>=0 ){
#if defined(STRICT_CLOSE_ERROR) && OSCLOSE_CHECK_CLOSE_IOERR
          if( osClose(pFile->h) ){
            storeLastErrno(pFile, errno);
            return SQLITE_IOERR_CLOSE;
          }
#else
          robust_close(pFile, pFile->h, __LINE__);
#endif
        }
        pFile->h = -1;
        fd = robust_open2(pCtx->dbPath, pFile->openFlags, 0, 0, 0);
        OSTRACE(("TRANSPROXY: OPEN  %d\n", fd));
        if( fd>=0 ){
          pFile->h = fd;
        }else{
          rc=SQLITE_CANTOPEN_BKPT; /* SQLITE_BUSY? proxyTakeConch called
           during locking */
        }
................................................................................
*/
static int switchLockProxyPath(unixFile *pFile, const char *path) {
  proxyLockingContext *pCtx = (proxyLockingContext*)pFile->lockingContext;
  char *oldPath = pCtx->lockProxyPath;
  int rc = SQLITE_OK;

  if( pFile->eFileLock!=NO_LOCK ){
#ifdef SQLITE_USE_FLOCKTIMEOUT
    if( pFile->nextFlockTimeout>0 ){
      usleep(((int)pFile->nextFlockTimeout) * 1000L);
    }
#endif
    return SQLITE_BUSY;
  }  

  /* nothing to do if the path is NULL, :auto: or matches the existing path */
  if( !path || path[0]=='\0' || !strcmp(path, ":auto:") ||
    (oldPath && !strncmp(oldPath, path, MAXPATHLEN)) ){
    return SQLITE_OK;
................................................................................
    strlcpy(dbPath, ((afpLockingContext *)pFile->lockingContext)->dbPath,
            MAXPATHLEN);
  } else
#endif
  if( pFile->pMethod == &dotlockIoMethods ){
    /* dot lock style uses the locking context to store the dot lock
    ** file path */
    long len = strlen((char *)pFile->lockingContext) - strlen(DOTLOCK_SUFFIX);
    memcpy(dbPath, (char *)pFile->lockingContext, len + 1);
  }else{
    /* all other styles use the locking context to store the db file path */
    assert( strlen((char*)pFile->lockingContext)<=MAXPATHLEN );
    strlcpy(dbPath, (char *)pFile->lockingContext, MAXPATHLEN);
  }
  return SQLITE_OK;
................................................................................
static int proxyTransformUnixFile(unixFile *pFile, const char *path) {
  proxyLockingContext *pCtx;
  char dbPath[MAXPATHLEN+1];       /* Name of the database file */
  char *lockPath=NULL;
  int rc = SQLITE_OK;
  
  if( pFile->eFileLock!=NO_LOCK ){
#ifdef SQLITE_USE_FLOCKTIMEOUT
    if( pFile->nextFlockTimeout>0 ){
      usleep(((int)pFile->nextFlockTimeout) * 1000L);
    }
#endif
    return SQLITE_BUSY;
  }
  getDbPathForUnixFile(pFile, dbPath);
  if( !path || path[0]=='\0' || !strcmp(path, ":auto:") ){
    lockPath=NULL;
  }else{
    lockPath=(char *)path;

Changes to src/pager.c.

18
19
20
21
22
23
24

25
26
27
28
29
30
31
....
3788
3789
3790
3791
3792
3793
3794


3795
3796
3797






3798
3799
3800
3801
3802
3803
3804
** file simultaneously, or one process from reading the database while
** another is writing.
*/
#ifndef SQLITE_OMIT_DISKIO
#include "sqliteInt.h"
#include "wal.h"



/******************* NOTES ON THE DESIGN OF THE PAGER ************************
**
** This comment block describes invariants that hold when using a rollback
** journal.  These invariants do not apply for journal_mode=WAL,
** journal_mode=MEMORY, or journal_mode=OFF.
**
................................................................................
  ** sqlite3PagerSetBusyhandler().
  */
  assert( (pPager->eLock>=locktype)
       || (pPager->eLock==NO_LOCK && locktype==SHARED_LOCK)
       || (pPager->eLock==RESERVED_LOCK && locktype==EXCLUSIVE_LOCK)
  );



  do {
    rc = pagerLockDb(pPager, locktype);
  }while( rc==SQLITE_BUSY && pPager->xBusyHandler(pPager->pBusyHandlerArg) );






  return rc;
}

/*
** Function assertTruncateConstraint(pPager) checks that one of the 
** following is true for all dirty pages currently in the page-cache:
**







>







 







>
>


|
>
>
>
>
>
>







18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
....
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
** file simultaneously, or one process from reading the database while
** another is writing.
*/
#ifndef SQLITE_OMIT_DISKIO
#include "sqliteInt.h"
#include "wal.h"

extern void pthread_yield_np(void);

/******************* NOTES ON THE DESIGN OF THE PAGER ************************
**
** This comment block describes invariants that hold when using a rollback
** journal.  These invariants do not apply for journal_mode=WAL,
** journal_mode=MEMORY, or journal_mode=OFF.
**
................................................................................
  ** sqlite3PagerSetBusyhandler().
  */
  assert( (pPager->eLock>=locktype)
       || (pPager->eLock==NO_LOCK && locktype==SHARED_LOCK)
       || (pPager->eLock==RESERVED_LOCK && locktype==EXCLUSIVE_LOCK)
  );

  int i = 0;
  int c = 0;
  do {
    rc = pagerLockDb(pPager, locktype);
    c = ( rc==SQLITE_BUSY && pPager->xBusyHandler(pPager->pBusyHandlerArg) );
    if (c && (i > 0)) {
      pthread_yield_np();
    }
    i++;
  }while( c );
  
  return rc;
}

/*
** Function assertTruncateConstraint(pPager) checks that one of the 
** following is true for all dirty pages currently in the page-cache:
**

Changes to src/pcache1.c.

15
16
17
18
19
20
21


22
23
24
25
26
27
28
....
1025
1026
1027
1028
1029
1030
1031


** of the SQLITE_CONFIG_PAGECACHE and sqlite3_release_memory() features.
** If the default page cache implementation is overriden, then neither of
** these two features are available.
*/

#include "sqliteInt.h"



typedef struct PCache1 PCache1;
typedef struct PgHdr1 PgHdr1;
typedef struct PgFreeslot PgFreeslot;
typedef struct PGroup PGroup;

/* Each page cache (or PCache) belongs to a PGroup.  A PGroup is a set 
** of one or more PCaches that are able to recycle each others unpinned
................................................................................
  }
  *pnCurrent = pcache1.grp.nCurrentPage;
  *pnMax = (int)pcache1.grp.nMaxPage;
  *pnMin = (int)pcache1.grp.nMinPage;
  *pnRecyclable = nRecyclable;
}
#endif









>
>







 







>
>
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
....
1027
1028
1029
1030
1031
1032
1033
1034
1035
** of the SQLITE_CONFIG_PAGECACHE and sqlite3_release_memory() features.
** If the default page cache implementation is overriden, then neither of
** these two features are available.
*/

#include "sqliteInt.h"

#if !defined(SQLITE_OMIT_PCACHE1_PCACHE)

typedef struct PCache1 PCache1;
typedef struct PgHdr1 PgHdr1;
typedef struct PgFreeslot PgFreeslot;
typedef struct PGroup PGroup;

/* Each page cache (or PCache) belongs to a PGroup.  A PGroup is a set 
** of one or more PCaches that are able to recycle each others unpinned
................................................................................
  }
  *pnCurrent = pcache1.grp.nCurrentPage;
  *pnMax = (int)pcache1.grp.nMaxPage;
  *pnMin = (int)pcache1.grp.nMinPage;
  *pnRecyclable = nRecyclable;
}
#endif

#endif /* SQLITE_OMIT_PCACHE1_PCACHE */

Changes to src/pragma.c.

1321
1322
1323
1324
1325
1326
1327







1328
1329
1330
1331
1332
1333
1334
      }
#endif /* SQLITE_OMIT_WSD */
    }
    break;
  }
#endif








#if SQLITE_ENABLE_LOCKING_STYLE
  /*
  **   PRAGMA [database.]lock_proxy_file
  **   PRAGMA [database.]lock_proxy_file = ":auto:"|"lock_file_path"
  **
  ** Return or set the value of the lock_proxy_file flag.  Changing
  ** the value sets a specific file to be used for database access locks.







>
>
>
>
>
>
>







1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
      }
#endif /* SQLITE_OMIT_WSD */
    }
    break;
  }
#endif

#if !defined(SQLITE_ENABLE_LOCKING_STYLE)
#  if defined(__APPLE__)
#    define SQLITE_ENABLE_LOCKING_STYLE 1
#  else
#    define SQLITE_ENABLE_LOCKING_STYLE 0
#  endif
#endif
#if SQLITE_ENABLE_LOCKING_STYLE
  /*
  **   PRAGMA [database.]lock_proxy_file
  **   PRAGMA [database.]lock_proxy_file = ":auto:"|"lock_file_path"
  **
  ** Return or set the value of the lock_proxy_file flag.  Changing
  ** the value sets a specific file to be used for database access locks.

Changes to src/shell.c.

3716
3717
3718
3719
3720
3721
3722
3723

3724
3725
3726
3727
3728
3729
3730
3731
3732
  char *zFirstCmd = 0;
  int i;
  int rc = 0;
  int warnInmemoryDb = 0;

#if USE_SYSTEM_SQLITE+0!=1
  if( strcmp(sqlite3_sourceid(),SQLITE_SOURCE_ID)!=0 ){
    fprintf(stderr, "SQLite header and source version mismatch\n%s\n%s\n",

            sqlite3_sourceid(), SQLITE_SOURCE_ID);
    exit(1);
  }
#endif
  Argv0 = argv[0];
  main_init(&data);
  stdin_is_interactive = isatty(0);

  /* Make sure we have a valid signal handler early, before anything







|
>

|







3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
  char *zFirstCmd = 0;
  int i;
  int rc = 0;
  int warnInmemoryDb = 0;

#if USE_SYSTEM_SQLITE+0!=1
  if( strcmp(sqlite3_sourceid(),SQLITE_SOURCE_ID)!=0 ){
    fprintf(stderr, "\nWARNING!  SQLite header and source version mismatch"
            "\n  source: %s\n  header: %s\n\n",
            sqlite3_sourceid(), SQLITE_SOURCE_ID);
    /* exit(1); */
  }
#endif
  Argv0 = argv[0];
  main_init(&data);
  stdin_is_interactive = isatty(0);

  /* Make sure we have a valid signal handler early, before anything

Changes to src/sqlite.h.in.

60
61
62
63
64
65
66



67
68
69
70
71
72
73
...
525
526
527
528
529
530
531




532
533
534
535
536
537
538
....
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
4998
4999
5000
5001
** would generate warning messages when they were used.  But that
** compiler magic ended up generating such a flurry of bug reports
** that we have taken it all out and gone back to using simple
** noop macros.
*/
#define SQLITE_DEPRECATED
#define SQLITE_EXPERIMENTAL




/*
** Ensure these symbols were not defined by some previous header file.
*/
#ifdef SQLITE_VERSION
# undef SQLITE_VERSION
#endif
................................................................................
#define SQLITE_OPEN_SUBJOURNAL       0x00002000  /* VFS only */
#define SQLITE_OPEN_MASTER_JOURNAL   0x00004000  /* VFS only */
#define SQLITE_OPEN_NOMUTEX          0x00008000  /* Ok for sqlite3_open_v2() */
#define SQLITE_OPEN_FULLMUTEX        0x00010000  /* Ok for sqlite3_open_v2() */
#define SQLITE_OPEN_SHAREDCACHE      0x00020000  /* Ok for sqlite3_open_v2() */
#define SQLITE_OPEN_PRIVATECACHE     0x00040000  /* Ok for sqlite3_open_v2() */
#define SQLITE_OPEN_WAL              0x00080000  /* VFS only */




#define SQLITE_OPEN_FILEPROTECTION_MASK                                 0x00700000

/* Reserved:                         0x00F00000 */

/*
** CAPI3REF: Device Characteristics
**
................................................................................
** sqlite3_open_v2 with SQLITE_OPEN_SHAREDCACHE instead.
**
** This interface is threadsafe on processors where writing a
** 32-bit integer is atomic.
**
** See Also:  [SQLite Shared-Cache Mode]
*/
int sqlite3_enable_shared_cache(int);

/*
** CAPI3REF: Attempt To Free Heap Memory
**
** ^The sqlite3_release_memory() interface attempts to free N bytes
** of heap memory by deallocating non-essential memory allocations
** held by the database library.   Memory used to cache database







>
>
>







 







>
>
>
>







 







|







60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
...
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
....
4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005
5006
5007
5008
** would generate warning messages when they were used.  But that
** compiler magic ended up generating such a flurry of bug reports
** that we have taken it all out and gone back to using simple
** noop macros.
*/
#define SQLITE_DEPRECATED
#define SQLITE_EXPERIMENTAL
#ifndef __OSX_AVAILABLE_BUT_DEPRECATED
#define __OSX_AVAILABLE_BUT_DEPRECATED(MacOSAvailable, MacOSDeprecated, iPhoneOSAvailable, iPhoneOSDeprecated)
#endif

/*
** Ensure these symbols were not defined by some previous header file.
*/
#ifdef SQLITE_VERSION
# undef SQLITE_VERSION
#endif
................................................................................
#define SQLITE_OPEN_SUBJOURNAL       0x00002000  /* VFS only */
#define SQLITE_OPEN_MASTER_JOURNAL   0x00004000  /* VFS only */
#define SQLITE_OPEN_NOMUTEX          0x00008000  /* Ok for sqlite3_open_v2() */
#define SQLITE_OPEN_FULLMUTEX        0x00010000  /* Ok for sqlite3_open_v2() */
#define SQLITE_OPEN_SHAREDCACHE      0x00020000  /* Ok for sqlite3_open_v2() */
#define SQLITE_OPEN_PRIVATECACHE     0x00040000  /* Ok for sqlite3_open_v2() */
#define SQLITE_OPEN_WAL              0x00080000  /* VFS only */
#define SQLITE_OPEN_FILEPROTECTION_COMPLETE                             0x00100000
#define SQLITE_OPEN_FILEPROTECTION_COMPLETEUNLESSOPEN                   0x00200000
#define SQLITE_OPEN_FILEPROTECTION_COMPLETEUNTILFIRSTUSERAUTHENTICATION 0x00300000
#define SQLITE_OPEN_FILEPROTECTION_NONE                                 0x00400000
#define SQLITE_OPEN_FILEPROTECTION_MASK                                 0x00700000

/* Reserved:                         0x00F00000 */

/*
** CAPI3REF: Device Characteristics
**
................................................................................
** sqlite3_open_v2 with SQLITE_OPEN_SHAREDCACHE instead.
**
** This interface is threadsafe on processors where writing a
** 32-bit integer is atomic.
**
** See Also:  [SQLite Shared-Cache Mode]
*/
int sqlite3_enable_shared_cache(int) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_0, __MAC_10_7, __IPHONE_2_0, __IPHONE_5_0);

/*
** CAPI3REF: Attempt To Free Heap Memory
**
** ^The sqlite3_release_memory() interface attempts to free N bytes
** of heap memory by deallocating non-essential memory allocations
** held by the database library.   Memory used to cache database

Changes to src/sqlite3_private.h.

1
2
3
4
5
6
7



8
9
10
11
12
13
14
..
31
32
33
34
35
36
37












38
39
40
41
42
43
44
/*
 *  sqlite3_private.h
 */

#ifndef _SQLITE3_PRIVATE_H
#define _SQLITE3_PRIVATE_H




#define SQLITE_LOCKSTATE_OFF    0
#define SQLITE_LOCKSTATE_ON     1
#define SQLITE_LOCKSTATE_NOTADB 2
#define SQLITE_LOCKSTATE_ERROR  -1

#define SQLITE_LOCKSTATE_ANYPID -1

................................................................................
** Test an open database connection for sqlite locks held by a process ID,
** if a process has an open database connection this will avoid trashing file
** locks by re-using open file descriptors for the database file and support
** files (-shm)
*/
#define SQLITE_FCNTL_LOCKSTATE_PID          103













/*
** Pass the SQLITE_TRUNCATE_DATABASE operation code to sqlite3_file_control() 
** to truncate a database and its associated journal file to zero length.  The 
** SQLITE_TRUNCATE_* flags represent optional flags to safely initialize an
** empty database in the place of the truncated database, the flags are passed 
** into sqlite3_file_control via the fourth argument using a pointer to an integer
** configured with the ORed flags.  If the fourth argument is NULL, the default 







>
>
>







 







>
>
>
>
>
>
>
>
>
>
>
>







1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
..
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
/*
 *  sqlite3_private.h
 */

#ifndef _SQLITE3_PRIVATE_H
#define _SQLITE3_PRIVATE_H

#include <unistd.h>
#include <sqlite3.h>

#define SQLITE_LOCKSTATE_OFF    0
#define SQLITE_LOCKSTATE_ON     1
#define SQLITE_LOCKSTATE_NOTADB 2
#define SQLITE_LOCKSTATE_ERROR  -1

#define SQLITE_LOCKSTATE_ANYPID -1

................................................................................
** Test an open database connection for sqlite locks held by a process ID,
** if a process has an open database connection this will avoid trashing file
** locks by re-using open file descriptors for the database file and support
** files (-shm)
*/
#define SQLITE_FCNTL_LOCKSTATE_PID          103

/*
** Purges eligible purgable memory regions (holding only unpinned pages) from 
** the page cache
*/
extern void _sqlite3_purgeEligiblePagerCacheMemory(void);

/*
** Returns the system defined default sqlite3_busy_handler function
** 
*/
extern int (*_sqlite3_system_busy_handler(void))(void*,int);

/*
** Pass the SQLITE_TRUNCATE_DATABASE operation code to sqlite3_file_control() 
** to truncate a database and its associated journal file to zero length.  The 
** SQLITE_TRUNCATE_* flags represent optional flags to safely initialize an
** empty database in the place of the truncated database, the flags are passed 
** into sqlite3_file_control via the fourth argument using a pointer to an integer
** configured with the ORed flags.  If the fourth argument is NULL, the default 

Changes to src/sqliteInt.h.

86
87
88
89
90
91
92



93

94
95
96
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98
99
100
...
186
187
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190
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192










193
194
195
196
197
198
199
#include "sqlite3.h"

/*
** Include the configuration header output by 'configure' if we're using the
** autoconf-based build
*/
#ifdef _HAVE_SQLITE_CONFIG_H



#include "config.h"

#endif

#include "sqliteLimit.h"

/* Disable nuisance warnings on Borland compilers */
#if defined(__BORLANDC__)
#pragma warn -rch /* unreachable code */
................................................................................
** SQLITE_CONFIG_MEMSTATUS are available by default or not. This value can
** be overridden at runtime using the sqlite3_config() API.
*/
#if !defined(SQLITE_DEFAULT_MEMSTATUS)
# define SQLITE_DEFAULT_MEMSTATUS 1
#endif











/*
** Exactly one of the following macros must be defined in order to
** specify which memory allocation subsystem to use.
**
**     SQLITE_SYSTEM_MALLOC          // Use normal system malloc()
**     SQLITE_WIN32_MALLOC           // Use Win32 native heap API
**     SQLITE_ZERO_MALLOC            // Use a stub allocator that always fails







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86
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212
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#include "sqlite3.h"

/*
** Include the configuration header output by 'configure' if we're using the
** autoconf-based build
*/
#ifdef _HAVE_SQLITE_CONFIG_H
# ifdef _MSC_VER
#include "win_config.h" /* hand-mantained windows variant */
# else
#include "config.h"
# endif
#endif

#include "sqliteLimit.h"

/* Disable nuisance warnings on Borland compilers */
#if defined(__BORLANDC__)
#pragma warn -rch /* unreachable code */
................................................................................
** SQLITE_CONFIG_MEMSTATUS are available by default or not. This value can
** be overridden at runtime using the sqlite3_config() API.
*/
#if !defined(SQLITE_DEFAULT_MEMSTATUS)
# define SQLITE_DEFAULT_MEMSTATUS 1
#endif

/*
** The SQLITE_ENABLE_PURGEABLE_PCACHE sets the default pcache to 
** pcache_purgeable, otherwise pcache1 is used.
*/
#if !defined(SQLITE_ENABLE_PURGEABLE_PCACHE)
# define SQLITE_OMIT_PURGEABLE_PCACHE
#else
# define SQLITE_OMIT_PCACHE1_PCACHE
#endif

/*
** Exactly one of the following macros must be defined in order to
** specify which memory allocation subsystem to use.
**
**     SQLITE_SYSTEM_MALLOC          // Use normal system malloc()
**     SQLITE_WIN32_MALLOC           // Use Win32 native heap API
**     SQLITE_ZERO_MALLOC            // Use a stub allocator that always fails

Changes to src/test1.c.

5090
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5097
5098
5099
5100
5101
5102
5103
5104
....
5107
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5109
5110
5111
5112
5113









5114
5115
5116
5117
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5119
5120
....
5155
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5165
5166
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5168
5169
....
5178
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5183
5184


































5185
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5187
5188
5189
5190
5191
....
6709
6710
6711
6712
6713
6714
6715

6716
6717
6718
6719
6720
6721
6722
                     Tcl_GetStringFromObj(Tcl_NewIntObj(iArg), 0), " ", 0);
    return TCL_ERROR;
  }
  return TCL_OK;  
}

#ifdef __APPLE__
/* From sqlite3_priavet.h */
# ifndef SQLITE_TRUNCATE_DATABASE
# define SQLITE_TRUNCATE_DATABASE      101
# define SQLITE_TRUNCATE_JOURNALMODE_WAL           (0x1<<0)
# define SQLITE_TRUNCATE_AUTOVACUUM_MASK           (0x3<<2)
# define SQLITE_TRUNCATE_AUTOVACUUM_OFF            (0x1<<2)
# define SQLITE_TRUNCATE_AUTOVACUUM_FULL           (0x2<<2)
# define SQLITE_TRUNCATE_AUTOVACUUM_INCREMENTAL    (0x3<<2)
................................................................................
# define SQLITE_TRUNCATE_PAGESIZE_2048             (0x2<<4)
# define SQLITE_TRUNCATE_PAGESIZE_4096             (0x3<<4)
# define SQLITE_TRUNCATE_PAGESIZE_8192             (0x4<<4)
# endif
# ifndef SQLITE_REPLACE_DATABASE
# define SQLITE_REPLACE_DATABASE       102
# endif










/*
** tclcmd:   file_control_truncate_test DB
**
** This TCL command runs the sqlite3_file_control interface and
** verifies correct operation of the SQLITE_TRUNCATE_DATABASE verb.
*/
................................................................................
*/
static int file_control_replace_test(
  ClientData clientData, /* Pointer to sqlite3_enable_XXX function */
  Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
  int objc,              /* Number of arguments */
  Tcl_Obj *CONST objv[]  /* Command arguments */
){
  int iArg = 0;
  sqlite3 *src_db;
  sqlite3 *dst_db;
  int rc;
  
  if( objc!=3 ){
    Tcl_AppendResult(interp, "wrong # args: should be \"",
                     Tcl_GetStringFromObj(objv[0], 0), " DST_DB SRC_DB", 0);
................................................................................
  rc = sqlite3_file_control(dst_db, NULL, SQLITE_REPLACE_DATABASE, src_db);
  if( rc ){ 
    Tcl_SetObjResult(interp, Tcl_NewIntObj(rc)); 
    return TCL_ERROR; 
  }
  return TCL_OK;  
}


































#endif /* __APPLE__ */

/*
** tclcmd:   file_control_chunksize_test DB DBNAME SIZE
**
** This TCL command runs the sqlite3_file_control interface and
** verifies correct operation of the SQLITE_GET_LOCKPROXYFILE and
................................................................................
     { "vfs_reregister_all",         vfs_reregister_all,  0   },
     { "file_control_test",          file_control_test,   0   },
     { "file_control_lasterrno_test", file_control_lasterrno_test,  0   },
     { "file_control_lockproxy_test", file_control_lockproxy_test,  0   },
#ifdef __APPLE__
     { "file_control_truncate_test", file_control_truncate_test,  0   },
     { "file_control_replace_test", file_control_replace_test,  0   },

#endif 
     { "file_control_chunksize_test", file_control_chunksize_test,  0   },
     { "file_control_sizehint_test",  file_control_sizehint_test,   0   },
#if SQLITE_OS_WIN
     { "file_control_win32_av_retry", file_control_win32_av_retry,  0   },
     { "file_control_win32_set_handle", file_control_win32_set_handle, 0  },
#endif







|







 







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<







 







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>







5090
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5095
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5097
5098
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5100
5101
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5103
5104
....
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
5122
5123
5124
5125
5126
5127
5128
5129
....
5164
5165
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5168
5169
5170

5171
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5173
5174
5175
5176
5177
....
5186
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5210
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5223
5224
5225
5226
5227
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5229
5230
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5232
5233
....
6751
6752
6753
6754
6755
6756
6757
6758
6759
6760
6761
6762
6763
6764
6765
                     Tcl_GetStringFromObj(Tcl_NewIntObj(iArg), 0), " ", 0);
    return TCL_ERROR;
  }
  return TCL_OK;  
}

#ifdef __APPLE__
/* From sqlite3_private.h */
# ifndef SQLITE_TRUNCATE_DATABASE
# define SQLITE_TRUNCATE_DATABASE      101
# define SQLITE_TRUNCATE_JOURNALMODE_WAL           (0x1<<0)
# define SQLITE_TRUNCATE_AUTOVACUUM_MASK           (0x3<<2)
# define SQLITE_TRUNCATE_AUTOVACUUM_OFF            (0x1<<2)
# define SQLITE_TRUNCATE_AUTOVACUUM_FULL           (0x2<<2)
# define SQLITE_TRUNCATE_AUTOVACUUM_INCREMENTAL    (0x3<<2)
................................................................................
# define SQLITE_TRUNCATE_PAGESIZE_2048             (0x2<<4)
# define SQLITE_TRUNCATE_PAGESIZE_4096             (0x3<<4)
# define SQLITE_TRUNCATE_PAGESIZE_8192             (0x4<<4)
# endif
# ifndef SQLITE_REPLACE_DATABASE
# define SQLITE_REPLACE_DATABASE       102
# endif
# ifndef SQLITE_FCNTL_LOCKSTATE_PID
#  define SQLITE_FCNTL_LOCKSTATE_PID          103
#  define SQLITE_LOCKSTATE_OFF    0
#  define SQLITE_LOCKSTATE_ON     1
#  define SQLITE_LOCKSTATE_NOTADB 2
#  define SQLITE_LOCKSTATE_ERROR  -1
#  define SQLITE_LOCKSTATE_ANYPID -1
extern int _sqlite3_lockstate(const char *path, pid_t pid);
# endif

/*
** tclcmd:   file_control_truncate_test DB
**
** This TCL command runs the sqlite3_file_control interface and
** verifies correct operation of the SQLITE_TRUNCATE_DATABASE verb.
*/
................................................................................
*/
static int file_control_replace_test(
  ClientData clientData, /* Pointer to sqlite3_enable_XXX function */
  Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
  int objc,              /* Number of arguments */
  Tcl_Obj *CONST objv[]  /* Command arguments */
){

  sqlite3 *src_db;
  sqlite3 *dst_db;
  int rc;
  
  if( objc!=3 ){
    Tcl_AppendResult(interp, "wrong # args: should be \"",
                     Tcl_GetStringFromObj(objv[0], 0), " DST_DB SRC_DB", 0);
................................................................................
  rc = sqlite3_file_control(dst_db, NULL, SQLITE_REPLACE_DATABASE, src_db);
  if( rc ){ 
    Tcl_SetObjResult(interp, Tcl_NewIntObj(rc)); 
    return TCL_ERROR; 
  }
  return TCL_OK;  
}

/*
** tclcmd:   file_control_lockstate_test DBNAME PID
**
** This TCL command runs the _sqlite3_lockstate interface and
** verifies correct operation of the SQLITE_FCNTL_LOCKSTATE_PID verb.
*/
static int file_control_lockstate_test(
  ClientData clientData, /* Pointer to sqlite3_enable_XXX function */
  Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
  int objc,              /* Number of arguments */
  Tcl_Obj *CONST objv[]  /* Command arguments */
){
  char *zDb;
  int pid = -1;
  int state;
  
  if( objc!=3 ){
    Tcl_AppendResult(interp, "wrong # args: should be \"",
                     Tcl_GetStringFromObj(objv[0], 0), " DBNAME PID", 0);
    return TCL_ERROR;
  }
  if( Tcl_GetIntFromObj(interp, objv[2], &pid) ){
    return TCL_ERROR;
  }
  zDb = Tcl_GetString(objv[1]);
  if( zDb[0]=='\0' ) zDb = NULL;
  if( !zDb ){
    return TCL_ERROR;
  }
  state = _sqlite3_lockstate(zDb, pid);
  Tcl_SetObjResult(interp, Tcl_NewIntObj(state));
  return TCL_OK;
}
#endif /* __APPLE__ */

/*
** tclcmd:   file_control_chunksize_test DB DBNAME SIZE
**
** This TCL command runs the sqlite3_file_control interface and
** verifies correct operation of the SQLITE_GET_LOCKPROXYFILE and
................................................................................
     { "vfs_reregister_all",         vfs_reregister_all,  0   },
     { "file_control_test",          file_control_test,   0   },
     { "file_control_lasterrno_test", file_control_lasterrno_test,  0   },
     { "file_control_lockproxy_test", file_control_lockproxy_test,  0   },
#ifdef __APPLE__
     { "file_control_truncate_test", file_control_truncate_test,  0   },
     { "file_control_replace_test", file_control_replace_test,  0   },
     { "file_control_lockstate_test", file_control_lockstate_test,  0   },
#endif 
     { "file_control_chunksize_test", file_control_chunksize_test,  0   },
     { "file_control_sizehint_test",  file_control_sizehint_test,   0   },
#if SQLITE_OS_WIN
     { "file_control_win32_av_retry", file_control_win32_av_retry,  0   },
     { "file_control_win32_set_handle", file_control_win32_set_handle, 0  },
#endif

Changes to src/test_config.c.

537
538
539
540
541
542
543






544
545
546
547
548
549
550
  Tcl_SetVar2(interp, "sqlite_options", "tclvar", "1", TCL_GLOBAL_ONLY);
#endif

  Tcl_SetVar2(interp, "sqlite_options", "threadsafe", 
      STRINGVALUE(SQLITE_THREADSAFE), TCL_GLOBAL_ONLY);
  assert( sqlite3_threadsafe()==SQLITE_THREADSAFE );







#ifdef SQLITE_OMIT_TEMPDB
  Tcl_SetVar2(interp, "sqlite_options", "tempdb", "0", TCL_GLOBAL_ONLY);
#else
  Tcl_SetVar2(interp, "sqlite_options", "tempdb", "1", TCL_GLOBAL_ONLY);
#endif

#ifdef SQLITE_OMIT_TRACE







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>
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537
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541
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544
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550
551
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553
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555
556
  Tcl_SetVar2(interp, "sqlite_options", "tclvar", "1", TCL_GLOBAL_ONLY);
#endif

  Tcl_SetVar2(interp, "sqlite_options", "threadsafe", 
      STRINGVALUE(SQLITE_THREADSAFE), TCL_GLOBAL_ONLY);
  assert( sqlite3_threadsafe()==SQLITE_THREADSAFE );

#if defined(USETHREADASSERTS)
  Tcl_SetVar2(interp,"sqlite_options","use_thread_asserts","1",TCL_GLOBAL_ONLY);
#else
  Tcl_SetVar2(interp,"sqlite_options","use_thread_asserts","0",TCL_GLOBAL_ONLY);
#endif
  
#ifdef SQLITE_OMIT_TEMPDB
  Tcl_SetVar2(interp, "sqlite_options", "tempdb", "0", TCL_GLOBAL_ONLY);
#else
  Tcl_SetVar2(interp, "sqlite_options", "tempdb", "1", TCL_GLOBAL_ONLY);
#endif

#ifdef SQLITE_OMIT_TRACE

Changes to src/test_intarray.c.

54
55
56
57
58
59
60
61
62

63
64
65
66
67
68
69
...
254
255
256
257
258
259
260

261
262
263
264
265
266
267
*/
#ifndef SQLITE_OMIT_VIRTUALTABLE

/*
** Free an sqlite3_intarray object.
*/
static void intarrayFree(sqlite3_intarray *p){
  if( p->xFree ){
    p->xFree(p->a);

  }
  sqlite3_free(p);
}

/*
** Table destructor for the intarray module.
*/
................................................................................
  sqlite3_intarray *pIntArray,   /* The intarray object to bind to */
  int nElements,                 /* Number of elements in the intarray */
  sqlite3_int64 *aElements,      /* Content of the intarray */
  void (*xFree)(void*)           /* How to dispose of the intarray when done */
){
  if( pIntArray->xFree ){
    pIntArray->xFree(pIntArray->a);

  }
  pIntArray->n = nElements;
  pIntArray->a = aElements;
  pIntArray->xFree = xFree;
  return SQLITE_OK;
}








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>







54
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56
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61
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66
67
68
69
70
...
255
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261
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265
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267
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269
*/
#ifndef SQLITE_OMIT_VIRTUALTABLE

/*
** Free an sqlite3_intarray object.
*/
static void intarrayFree(sqlite3_intarray *p){
  if( p->xFree && p->a){
    p->xFree(p->a);
    p->a = NULL;
  }
  sqlite3_free(p);
}

/*
** Table destructor for the intarray module.
*/
................................................................................
  sqlite3_intarray *pIntArray,   /* The intarray object to bind to */
  int nElements,                 /* Number of elements in the intarray */
  sqlite3_int64 *aElements,      /* Content of the intarray */
  void (*xFree)(void*)           /* How to dispose of the intarray when done */
){
  if( pIntArray->xFree ){
    pIntArray->xFree(pIntArray->a);
    pIntArray->a = NULL;
  }
  pIntArray->n = nElements;
  pIntArray->a = aElements;
  pIntArray->xFree = xFree;
  return SQLITE_OK;
}

Changes to src/util.c.

1066
1067
1068
1069
1070
1071
1072








1073
1074
1075
1076
1077
1078
1079
....
1104
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1110





1111
1112
1113
1114
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1116
1117
....
1161
1162
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1164
1165
1166
1167

1168
1169
1170
1171
1172
1173
1174
    }
    zBlob[i/2] = 0;
  }
  return zBlob;
}
#endif /* !SQLITE_OMIT_BLOB_LITERAL || SQLITE_HAS_CODEC */









/*
** Log an error that is an API call on a connection pointer that should
** not have been used.  The "type" of connection pointer is given as the
** argument.  The zType is a word like "NULL" or "closed" or "invalid".
*/
static void logBadConnection(const char *zType){
  sqlite3_log(SQLITE_MISUSE, 
................................................................................
  }
  magic = db->magic;
  if( magic!=SQLITE_MAGIC_OPEN ){
    if( sqlite3SafetyCheckSickOrOk(db) ){
      testcase( sqlite3GlobalConfig.xLog!=0 );
      logBadConnection("unopened");
    }





    return 0;
  }else{
    return 1;
  }
}
int sqlite3SafetyCheckSickOrOk(sqlite3 *db){
  u32 magic;
................................................................................
  }
}
#define TWOPOWER32 (((i64)1)<<32)
#define TWOPOWER31 (((i64)1)<<31)
int sqlite3MulInt64(i64 *pA, i64 iB){
  i64 iA = *pA;
  i64 iA1, iA0, iB1, iB0, r;


  iA1 = iA/TWOPOWER32;
  iA0 = iA % TWOPOWER32;
  iB1 = iB/TWOPOWER32;
  iB0 = iB % TWOPOWER32;
  if( iA1==0 ){
    if( iB1==0 ){







>
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1066
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1073
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1083
1084
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1086
1087
....
1112
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1116
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1130
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1177
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1181
1182
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1184
1185
1186
1187
1188
    }
    zBlob[i/2] = 0;
  }
  return zBlob;
}
#endif /* !SQLITE_OMIT_BLOB_LITERAL || SQLITE_HAS_CODEC */

#if defined(__APPLE__) && (defined(USETHREADASSERTS) || defined(SQLITE_DEBUG))
__private_extern__ char* __crashreporter_info__ = NULL;
static const char* _defaultMessage_ = "\n SQLite: Fatal multithreading error in caller.  Illegal multi-threaded access to the same database connection.\n";
#define HALT_CATCH_FIRE() { __crashreporter_info__ = (char*)_defaultMessage_; __builtin_trap(); }
#else
#define HALT_CATCH_FIRE()
#endif

/*
** Log an error that is an API call on a connection pointer that should
** not have been used.  The "type" of connection pointer is given as the
** argument.  The zType is a word like "NULL" or "closed" or "invalid".
*/
static void logBadConnection(const char *zType){
  sqlite3_log(SQLITE_MISUSE, 
................................................................................
  }
  magic = db->magic;
  if( magic!=SQLITE_MAGIC_OPEN ){
    if( sqlite3SafetyCheckSickOrOk(db) ){
      testcase( sqlite3GlobalConfig.xLog!=0 );
      logBadConnection("unopened");
    }
#if defined(USETHREADASSERTS) || defined(SQLITE_DEBUG)
    if (magic==SQLITE_MAGIC_BUSY) {
      HALT_CATCH_FIRE();
    }
#endif
    return 0;
  }else{
    return 1;
  }
}
int sqlite3SafetyCheckSickOrOk(sqlite3 *db){
  u32 magic;
................................................................................
  }
}
#define TWOPOWER32 (((i64)1)<<32)
#define TWOPOWER31 (((i64)1)<<31)
int sqlite3MulInt64(i64 *pA, i64 iB){
  i64 iA = *pA;
  i64 iA1, iA0, iB1, iB0, r;
#undef HALT_CATCH_FIRE

  iA1 = iA/TWOPOWER32;
  iA0 = iA % TWOPOWER32;
  iB1 = iB/TWOPOWER32;
  iB0 = iB % TWOPOWER32;
  if( iA1==0 ){
    if( iB1==0 ){

Changes to src/vtab.c.

41
42
43
44
45
46
47





48
49
50
51
52
53
54
...
322
323
324
325
326
327
328



329

330
331
332
333
334
335
336
  int rc = SQLITE_OK;
  int nName;

  sqlite3_mutex_enter(db->mutex);
  nName = sqlite3Strlen30(zName);
  if( sqlite3HashFind(&db->aModule, zName, nName) ){
    rc = SQLITE_MISUSE_BKPT;





  }else{
    Module *pMod;
    pMod = (Module *)sqlite3DbMallocRaw(db, sizeof(Module) + nName + 1);
    if( pMod ){
      Module *pDel;
      char *zCopy = (char *)(&pMod[1]);
      memcpy(zCopy, zName, nName+1);
................................................................................
  assert( iDb>=0 );

  pTable->tabFlags |= TF_Virtual;
  pTable->nModuleArg = 0;
  addModuleArgument(db, pTable, sqlite3NameFromToken(db, pModuleName));
  addModuleArgument(db, pTable, 0);
  addModuleArgument(db, pTable, sqlite3DbStrDup(db, pTable->zName));



  pParse->sNameToken.n = (int)(&pModuleName->z[pModuleName->n] - pName1->z);


#ifndef SQLITE_OMIT_AUTHORIZATION
  /* Creating a virtual table invokes the authorization callback twice.
  ** The first invocation, to obtain permission to INSERT a row into the
  ** sqlite_master table, has already been made by sqlite3StartTable().
  ** The second call, to obtain permission to create the table, is made now.
  */







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  int rc = SQLITE_OK;
  int nName;

  sqlite3_mutex_enter(db->mutex);
  nName = sqlite3Strlen30(zName);
  if( sqlite3HashFind(&db->aModule, zName, nName) ){
    rc = SQLITE_MISUSE_BKPT;
    // <rdar://problem/11777852>
    if (strncmp("fts", zName, 3) == 0) {
      xDestroy = NULL;
      rc = SQLITE_OK;
    }
  }else{
    Module *pMod;
    pMod = (Module *)sqlite3DbMallocRaw(db, sizeof(Module) + nName + 1);
    if( pMod ){
      Module *pDel;
      char *zCopy = (char *)(&pMod[1]);
      memcpy(zCopy, zName, nName+1);
................................................................................
  assert( iDb>=0 );

  pTable->tabFlags |= TF_Virtual;
  pTable->nModuleArg = 0;
  addModuleArgument(db, pTable, sqlite3NameFromToken(db, pModuleName));
  addModuleArgument(db, pTable, 0);
  addModuleArgument(db, pTable, sqlite3DbStrDup(db, pTable->zName));
  if (pName2 && pName2->z) {
    pParse->sNameToken.n = (int)(&pModuleName->z[pModuleName->n] - pName2->z);
  } else {
    pParse->sNameToken.n = (int)(&pModuleName->z[pModuleName->n] - pName1->z);
  }

#ifndef SQLITE_OMIT_AUTHORIZATION
  /* Creating a virtual table invokes the authorization callback twice.
  ** The first invocation, to obtain permission to INSERT a row into the
  ** sqlite_master table, has already been made by sqlite3StartTable().
  ** The second call, to obtain permission to create the table, is made now.
  */

Changes to src/wal.c.

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  u32 iDbpage = 0;                /* Next database page to write */
  u32 iFrame = 0;                 /* Wal frame containing data for iDbpage */
  u32 mxSafeFrame;                /* Max frame that can be backfilled */
  u32 mxPage;                     /* Max database page to write */
  int i;                          /* Loop counter */
  volatile WalCkptInfo *pInfo;    /* The checkpoint status information */
  int (*xBusy)(void*) = 0;        /* Function to call when waiting for locks */






  szPage = walPagesize(pWal);
  testcase( szPage<=32768 );
  testcase( szPage>=65536 );
  pInfo = walCkptInfo(pWal);
  if( pInfo->nBackfill>=pWal->hdr.mxFrame ) return SQLITE_OK;














  /* Allocate the iterator */
  rc = walIteratorInit(pWal, &pIter);
  if( rc!=SQLITE_OK ){
    return rc;
  }
  assert( pIter );
................................................................................
      if( iFrame<=nBackfill || iFrame>mxSafeFrame || iDbpage>mxPage ) continue;
      iOffset = walFrameOffset(iFrame, szPage) + WAL_FRAME_HDRSIZE;
      /* testcase( IS_BIG_INT(iOffset) ); // requires a 4GiB WAL file */
      rc = sqlite3OsRead(pWal->pWalFd, zBuf, szPage, iOffset);
      if( rc!=SQLITE_OK ) break;
      iOffset = (iDbpage-1)*(i64)szPage;
      testcase( IS_BIG_INT(iOffset) );


















      rc = sqlite3OsWrite(pWal->pDbFd, zBuf, szPage, iOffset);
      if( rc!=SQLITE_OK ) break;
    }

    /* If work was actually accomplished... */
    if( rc==SQLITE_OK ){
      if( mxSafeFrame==walIndexHdr(pWal)->mxFrame ){
................................................................................
    WALTRACE(("WAL%p: closed\n", pWal));
    sqlite3_free((void *)pWal->apWiData);
    sqlite3_free(pWal);
  }
  return rc;
}





/*
** Try to read the wal-index header.  Return 0 on success and 1 if
** there is a problem.
**
** The wal-index is in shared memory.  Another thread or process might
** be writing the header at the same time this procedure is trying to
** read it, which might result in inconsistency.  A dirty read is detected
................................................................................
** If the checksum cannot be verified return non-zero. If the header
** is read successfully and the checksum verified, return zero.
*/
static int walIndexTryHdr(Wal *pWal, int *pChanged){
  u32 aCksum[2];                  /* Checksum on the header content */
  WalIndexHdr h1, h2;             /* Two copies of the header content */
  WalIndexHdr volatile *aHdr;     /* Header in shared memory */


  /* The first page of the wal-index must be mapped at this point. */
  assert( pWal->nWiData>0 && pWal->apWiData[0] );

  /* Read the header. This might happen concurrently with a write to the
  ** same area of shared memory on a different CPU in a SMP,
  ** meaning it is possible that an inconsistent snapshot is read
................................................................................
  ** Memory barriers are used to prevent the compiler or the hardware from
  ** reordering the reads and writes.
  */
  aHdr = walIndexHdr(pWal);
  if( aHdr==NULL ){
    return 1; /* Shouldn't be getting NULL from walIndexHdr, but we are */
  }

  memcpy(&h1, (void *)&aHdr[0], sizeof(h1));




  walShmBarrier(pWal);

  memcpy(&h2, (void *)&aHdr[1], sizeof(h2));




  if( memcmp(&h1, &h2, sizeof(h1))!=0 ){
    return 1;   /* Dirty read */
  }  
  if( h1.isInit==0 ){
    return 1;   /* Malformed header - probably all zeros */
  }
................................................................................
  /* Write all frames into the log file exactly once */
  for(p=pList; p; p=p->pDirty){
    int nDbSize;   /* 0 normally.  Positive == commit flag */
    iFrame++;
    assert( iOffset==walFrameOffset(iFrame, szPage) );
    nDbSize = (isCommit && p->pDirty==0) ? nTruncate : 0;
    rc = walWriteOneFrame(&w, p, nDbSize, iOffset);





    if( rc ) return rc;

    pLast = p;
    iOffset += szFrame;
  }

  /* If this is the end of a transaction, then we might need to pad
  ** the transaction and/or sync the WAL file.
  **
................................................................................
  */
  if( isCommit && (sync_flags & WAL_SYNC_TRANSACTIONS)!=0 ){
    if( pWal->padToSectorBoundary ){
      int sectorSize = sqlite3SectorSize(pWal->pWalFd);
      w.iSyncPoint = ((iOffset+sectorSize-1)/sectorSize)*sectorSize;
      while( iOffset<w.iSyncPoint ){
        rc = walWriteOneFrame(&w, pLast, nTruncate, iOffset);





        if( rc ) return rc;

        iOffset += szFrame;
        nExtra++;
      }
    }else{
      rc = sqlite3OsSync(w.pFd, sync_flags & SQLITE_SYNC_MASK);
    }
  }

#if defined(SQLITE_WRITE_WALFRAME_PREBUFFERED)
  free(w.aFrameBuf);

#endif
  /* If this frame set completes the first transaction in the WAL and
  ** if PRAGMA journal_size_limit is set, then truncate the WAL to the
  ** journal size limit, if possible.
  */
  if( isCommit && pWal->truncateOnCommit && pWal->mxWalSize>=0 ){
    i64 sz = pWal->mxWalSize;







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  u32 iDbpage = 0;                /* Next database page to write */
  u32 iFrame = 0;                 /* Wal frame containing data for iDbpage */
  u32 mxSafeFrame;                /* Max frame that can be backfilled */
  u32 mxPage;                     /* Max database page to write */
  int i;                          /* Loop counter */
  volatile WalCkptInfo *pInfo;    /* The checkpoint status information */
  int (*xBusy)(void*) = 0;        /* Function to call when waiting for locks */
#if defined(__APPLE__)
  /* <rdar://problem/17742712> */
  i64 szDbFile;                   /* File size of the database, in bytes */
  i64 szWalFile;                  /* File size of the wal, in bytes */
#endif

  szPage = walPagesize(pWal);
  testcase( szPage<=32768 );
  testcase( szPage>=65536 );
  pInfo = walCkptInfo(pWal);
  if( pInfo->nBackfill>=pWal->hdr.mxFrame ) return SQLITE_OK;

#if defined(__APPLE__)
  /* <rdar://problem/17742712> */
  /* Get the size of the db and wal files to sanity check write offsets. */
  rc = sqlite3OsFileSize(pWal->pDbFd, &szDbFile);
  if( rc!=SQLITE_OK ){
      return rc;
  }
  rc = sqlite3OsFileSize(pWal->pWalFd, &szWalFile);
  if( rc!=SQLITE_OK ){
      return rc;
  }
#endif

  /* Allocate the iterator */
  rc = walIteratorInit(pWal, &pIter);
  if( rc!=SQLITE_OK ){
    return rc;
  }
  assert( pIter );
................................................................................
      if( iFrame<=nBackfill || iFrame>mxSafeFrame || iDbpage>mxPage ) continue;
      iOffset = walFrameOffset(iFrame, szPage) + WAL_FRAME_HDRSIZE;
      /* testcase( IS_BIG_INT(iOffset) ); // requires a 4GiB WAL file */
      rc = sqlite3OsRead(pWal->pWalFd, zBuf, szPage, iOffset);
      if( rc!=SQLITE_OK ) break;
      iOffset = (iDbpage-1)*(i64)szPage;
      testcase( IS_BIG_INT(iOffset) );
      
#if defined(__APPLE__)
      /* <rdar://problem/17742712> */
      /* DEBUG(numist): this is way, way more conservative than the checks in
      ** the seekAndRead/seekAndWrite functions. I'm not even 100% sure that
      ** it's not overconservative, but db storage is more efficient than wal
      ** storage, so I'm pretty confident that writes to the db should never
      ** exceed dbsize +_ walsize.
      */
      if( iOffset>(szDbFile+szWalFile) ){
        __builtin_trap();
      }
      /* Update the db file size if the file will grow due to the write. */
      if( iOffset+szPage > szDbFile ){
        szDbFile = iOffset+szPage;
      }
#endif
      
      rc = sqlite3OsWrite(pWal->pDbFd, zBuf, szPage, iOffset);
      if( rc!=SQLITE_OK ) break;
    }

    /* If work was actually accomplished... */
    if( rc==SQLITE_OK ){
      if( mxSafeFrame==walIndexHdr(pWal)->mxFrame ){
................................................................................
    WALTRACE(("WAL%p: closed\n", pWal));
    sqlite3_free((void *)pWal->apWiData);
    sqlite3_free(pWal);
  }
  return rc;
}

#ifndef SQLITE_AMALGAMATION
extern int sqlite30sShmRead(sqlite3_file *id, void *dst, volatile void *src, sqlite3_int64 size);
#endif

/*
** Try to read the wal-index header.  Return 0 on success and 1 if
** there is a problem.
**
** The wal-index is in shared memory.  Another thread or process might
** be writing the header at the same time this procedure is trying to
** read it, which might result in inconsistency.  A dirty read is detected
................................................................................
** If the checksum cannot be verified return non-zero. If the header
** is read successfully and the checksum verified, return zero.
*/
static int walIndexTryHdr(Wal *pWal, int *pChanged){
  u32 aCksum[2];                  /* Checksum on the header content */
  WalIndexHdr h1, h2;             /* Two copies of the header content */
  WalIndexHdr volatile *aHdr;     /* Header in shared memory */
  int rc = SQLITE_OK;

  /* The first page of the wal-index must be mapped at this point. */
  assert( pWal->nWiData>0 && pWal->apWiData[0] );

  /* Read the header. This might happen concurrently with a write to the
  ** same area of shared memory on a different CPU in a SMP,
  ** meaning it is possible that an inconsistent snapshot is read
................................................................................
  ** Memory barriers are used to prevent the compiler or the hardware from
  ** reordering the reads and writes.
  */
  aHdr = walIndexHdr(pWal);
  if( aHdr==NULL ){
    return 1; /* Shouldn't be getting NULL from walIndexHdr, but we are */
  }
  
  rc = sqlite30sShmRead(pWal->pDbFd, &h1, &aHdr[0], sizeof(h1));
  if ( rc!=SQLITE_OK ) {
    return rc;
  }

  walShmBarrier(pWal);

  rc = sqlite30sShmRead(pWal->pDbFd, &h2, &aHdr[1], sizeof(h2));
  if ( rc!=SQLITE_OK ) {
    return rc;
  }

  if( memcmp(&h1, &h2, sizeof(h1))!=0 ){
    return 1;   /* Dirty read */
  }  
  if( h1.isInit==0 ){
    return 1;   /* Malformed header - probably all zeros */
  }
................................................................................
  /* Write all frames into the log file exactly once */
  for(p=pList; p; p=p->pDirty){
    int nDbSize;   /* 0 normally.  Positive == commit flag */
    iFrame++;
    assert( iOffset==walFrameOffset(iFrame, szPage) );
    nDbSize = (isCommit && p->pDirty==0) ? nTruncate : 0;
    rc = walWriteOneFrame(&w, p, nDbSize, iOffset);
    if( rc ) {
#if defined(SQLITE_WRITE_WALFRAME_PREBUFFERED)
      free(w.aFrameBuf);
      w.aFrameBuf = NULL;
#endif
      return rc;
    }
    pLast = p;
    iOffset += szFrame;
  }

  /* If this is the end of a transaction, then we might need to pad
  ** the transaction and/or sync the WAL file.
  **
................................................................................
  */
  if( isCommit && (sync_flags & WAL_SYNC_TRANSACTIONS)!=0 ){
    if( pWal->padToSectorBoundary ){
      int sectorSize = sqlite3SectorSize(pWal->pWalFd);
      w.iSyncPoint = ((iOffset+sectorSize-1)/sectorSize)*sectorSize;
      while( iOffset<w.iSyncPoint ){
        rc = walWriteOneFrame(&w, pLast, nTruncate, iOffset);
        if( rc ) {
#if defined(SQLITE_WRITE_WALFRAME_PREBUFFERED)
          free(w.aFrameBuf);
          w.aFrameBuf = NULL;
#endif
          return rc;
        }
        iOffset += szFrame;
        nExtra++;
      }
    }else{
      rc = sqlite3OsSync(w.pFd, sync_flags & SQLITE_SYNC_MASK);
    }
  }

#if defined(SQLITE_WRITE_WALFRAME_PREBUFFERED)
  free(w.aFrameBuf);
  w.aFrameBuf = NULL;
#endif
  /* If this frame set completes the first transaction in the WAL and
  ** if PRAGMA journal_size_limit is set, then truncate the WAL to the
  ** journal size limit, if possible.
  */
  if( isCommit && pWal->truncateOnCommit && pWal->mxWalSize>=0 ){
    i64 sz = pWal->mxWalSize;

Changes to test/fallocate.test.

75
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78
79
80
81





82
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89
90
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92
93
94
set skipwaltests [expr {
  [permutation]=="journaltest" || [permutation]=="inmemory_journal"
}]
ifcapable !wal { set skipwaltests 1 }
if {![wal_is_ok]} { set skipwaltests 1 }

if {!$skipwaltests} {





  db close
  forcedelete test.db
  ifcapable enable_persist_wal {
    forcedelete test.db-journal
    forcedelete test.db-wal
    forcedelete test.db-shm
  }
  if {[forced_proxy_locking]} { 
    forcedelete .test.db-conch
  }
  sqlite3 db test.db
  ifcapable enable_persist_wal {
    file_control_persist_wal db 0







>
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set skipwaltests [expr {
  [permutation]=="journaltest" || [permutation]=="inmemory_journal"
}]
ifcapable !wal { set skipwaltests 1 }
if {![wal_is_ok]} { set skipwaltests 1 }

if {!$skipwaltests} {
  set shmpath test.db-shm
  if {[forced_proxy_locking]} {
    set shmpath [execsql { pragma lock_proxy_file }]-shm
    #puts $shmpath
  }
  db close
  forcedelete test.db
  ifcapable enable_persist_wal {
    forcedelete test.db-journal
    forcedelete test.db-wal
    forcedelete $shmpath
  }
  if {[forced_proxy_locking]} { 
    forcedelete .test.db-conch
  }
  sqlite3 db test.db
  ifcapable enable_persist_wal {
    file_control_persist_wal db 0

Changes to test/lock_proxy.test.

51
52
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65
  } {1}
  catch { db2 close }


  # test proxy locking readonly file system handling
  #

  if {[file exists /usr/bin/hdiutil]} {

    puts "Creating readonly file system for proxy locking tests..."
    if {[file exists /Volumes/readonly]} {
      exec hdiutil detach /Volumes/readonly
    }
    if {[file exists readonly.dmg]} {
      file delete readonly.dmg







|







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65
  } {1}
  catch { db2 close }


  # test proxy locking readonly file system handling
  #

  if {[path_is_local "."]&&[file exists /usr/bin/hdiutil]} {

    puts "Creating readonly file system for proxy locking tests..."
    if {[file exists /Volumes/readonly]} {
      exec hdiutil detach /Volumes/readonly
    }
    if {[file exists readonly.dmg]} {
      file delete readonly.dmg

Changes to test/mutex1.test.

133
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136
137
138
139






140
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142
143
144
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146
      mutex_counters counters
  
      set res [list]
      foreach {key value} [array get counters] {
        if {$key ne "total" && $value > 0} {
          lappend res $key
        }






      }
      lsort $res
    } [lsort $mutexes]
  }
  sqlite3_enable_shared_cache $enable_shared_cache

  # Open and use a connection in "nomutex" mode. Test that no recursive







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      mutex_counters counters
  
      set res [list]
      foreach {key value} [array get counters] {
        if {$key ne "total" && $value > 0} {
          lappend res $key
        }
      }
      ifcapable {use_thread_asserts} {
        if { $mode == "multithread" } {
          # USETHREADASSERTS changes the multithread mutexes to serialized
          set res [lsort $mutexes]
        }
      }
      lsort $res
    } [lsort $mutexes]
  }
  sqlite3_enable_shared_cache $enable_shared_cache

  # Open and use a connection in "nomutex" mode. Test that no recursive

Changes to test/permutations.test.

341
342
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345
346
347

348
349
350
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352
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357
} 

test_suite "coverage-pager" -description {
  Coverage tests for file pager.c.
} -files {
  pager1.test    pager2.test  pagerfault.test  pagerfault2.test
  walfault.test  walbak.test  journal2.test    tkt-9d68c883.test

} 

test_suite "coverage-analyze" -description {
  Coverage tests for file analyze.c.
} -files {
  analyze3.test analyze4.test analyze5.test analyze6.test
  analyze7.test analyze8.test analyze9.test analyzeA.test
  analyze.test analyzeB.test mallocA.test
} 








>


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341
342
343
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345
346
347
348
349
350

351
352
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357
} 

test_suite "coverage-pager" -description {
  Coverage tests for file pager.c.
} -files {
  pager1.test    pager2.test  pagerfault.test  pagerfault2.test
  walfault.test  walbak.test  journal2.test    tkt-9d68c883.test
test_suite "coverage-analyze" -description {
} 


  Coverage tests for file analyze.c.
} -files {
  analyze3.test analyze4.test analyze5.test analyze6.test
  analyze7.test analyze8.test analyze9.test analyzeA.test
  analyze.test analyzeB.test mallocA.test
} 

Changes to test/pragma.test.

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    execsql "PRAGMA lock_proxy_file='$lpp6'" 
    set lockpath4 [execsql {
      create table if not exists aa(bb);
      PRAGMA lock_proxy_file;
    } db]
    string match "*proxytest/sub/dir/lock" $lockpath4
  } {1}
























  # ensure that if the path can not be created (perm), setting :auto: deals
  db close
  file delete -force $lpp5d
  do_test pragma-16.10.5 {
    sqlite3 db proxytest.db
    execsql "PRAGMA lock_proxy_file='$lpp5'" 







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    execsql "PRAGMA lock_proxy_file='$lpp6'" 
    set lockpath4 [execsql {
      create table if not exists aa(bb);
      PRAGMA lock_proxy_file;
    } db]
    string match "*proxytest/sub/dir/lock" $lockpath4
  } {1}

  # make sure we can deal with long (> NAME_MAX) file paths correctly
  db close
  set db_longroot [exec mktemp -d -t "longdbpath"]
  set db_longpath $db_longroot/123456789/223456789/323456789/423456789/523456789/623456789/723456789/823456789/923456789/a23456789/b23456789/c23456789/d23456789/e23456789/f23456789/g23456789/h23456789/i23456789/j23456789/k23456789/l23456789/m23456789/n23456789/o23456789/p23456789/q23456789
  file mkdir $db_longpath
  do_test pragma-16.10.4.1 {
    sqlite3 db $db_longpath/longtest.db
    execsql "PRAGMA lock_proxy_file=':auto:'"
    set lockpath_long [execsql {
      create table if not exists aa(bb);
      PRAGMA lock_proxy_file;
    } db]
    #puts $db_longpath
    #puts $lockpath_long
    set lockPathLen [string len $lockpath_long]
    set dbPathLen [string len $db_longpath]
    set lockName [string range $lockpath_long [string last / $lockpath_long] $lockPathLen]
    set nameLength [string len $lockName]
    list [expr "$dbPathLen > 256"] [expr "$lockPathLen < 1024"] [expr "$nameLength < 256"] [expr "$lockPathLen > 7"] [expr "$nameLength > 7"]
  } {1 1 1 1 1}
  file delete -force $db_longroot
  file delete -force $lockpath_long

  # ensure that if the path can not be created (perm), setting :auto: deals
  db close
  file delete -force $lpp5d
  do_test pragma-16.10.5 {
    sqlite3 db proxytest.db
    execsql "PRAGMA lock_proxy_file='$lpp5'" 

Changes to test/superlock.test.

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  set wal2 [read_content ${file2}-wal]
  write_content ${file1}-wal $wal2
  write_content ${file2}-wal $wal1

  unlock1
  unlock2
}








forcedelete test.db
sqlite3 db  test.db

do_execsql_test 6.1 {
  ATTACH 'test.db2' AS aux;
  PRAGMA aux.journal_mode = wal;
  CREATE TABLE aux.t2(x, y);
  INSERT INTO aux.t2 VALUES('a', 'b');
  PRAGMA schema_version = 450;
  DETACH aux;
................................................................................
  PRAGMA main.journal_mode = wal;
  CREATE TABLE t1(a, b);
  INSERT INTO t1 VALUES(1, 2);
  INSERT INTO t1 VALUES(3, 4);
  SELECT * FROM t1;
} {wal wal 1 2 3 4}





db_swap test.db2 test.db
do_catchsql_test 6.2 { SELECT * FROM t1 } {1 {no such table: t1}}
do_catchsql_test 6.3 { SELECT * FROM t2 } {0 {a b}}

db_swap test.db2 test.db
do_catchsql_test 6.4 { SELECT * FROM t1 } {0 {1 2 3 4}}







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  set wal2 [read_content ${file2}-wal]
  write_content ${file1}-wal $wal2
  write_content ${file2}-wal $wal1

  unlock1
  unlock2
}

sqlite3 db  test.db
file_control_persist_wal db 0
db close
sqlite3 db2  test.db2
file_control_persist_wal db2 0
db2 close

forcedelete test.db
sqlite3 db  test.db
file_control_persist_wal db 0
do_execsql_test 6.1 {
  ATTACH 'test.db2' AS aux;
  PRAGMA aux.journal_mode = wal;
  CREATE TABLE aux.t2(x, y);
  INSERT INTO aux.t2 VALUES('a', 'b');
  PRAGMA schema_version = 450;
  DETACH aux;
................................................................................
  PRAGMA main.journal_mode = wal;
  CREATE TABLE t1(a, b);
  INSERT INTO t1 VALUES(1, 2);
  INSERT INTO t1 VALUES(3, 4);
  SELECT * FROM t1;
} {wal wal 1 2 3 4}

sqlite3 db2  test.db2
file_control_persist_wal db2 0
db2 close

db_swap test.db2 test.db
do_catchsql_test 6.2 { SELECT * FROM t1 } {1 {no such table: t1}}
do_catchsql_test 6.3 { SELECT * FROM t2 } {0 {a b}}

db_swap test.db2 test.db
do_catchsql_test 6.4 { SELECT * FROM t1 } {0 {1 2 3 4}}

Changes to test/walro.test.

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do_multiclient_test tn {
  
  # Close all connections and delete the database.
  #
  code1 { db close  }
  code2 { db2 close }
  code3 { db3 close }
  forcedelete test.db
  forcedelete walro
  
  # Do not run tests with the connections in the same process.
  #
  if {$tn==2} continue

  foreach c {code1 code2 code3} {
................................................................................
  } {SQLITE_READONLY_RECOVERY}

  #-----------------------------------------------------------------------
  # Test cases 1.4.* check that checkpoints and log wraps don't prevent
  # read-only connections from reading the database.
  do_test 1.4.1 {
    code1 { db close }
    forcedelete test.db-shm
    file exists test.db-shm
  } {0}

  # Open one read-only and one read-write connection. Write some data
  # and then run a checkpoint using the read-write connection. Then
  # check the read-only connection can still read.
  do_test 1.4.2 {
    code1 { sqlite3 db file:test.db?readonly_shm=1 }
................................................................................
forcedelete test.db

#-----------------------------------------------------------------------
# Test cases 2.* check that a read-only connection may read the
# database file while a checkpoint operation is ongoing.
#
do_multiclient_test tn {



  
  # Close all connections and delete the database.
  #
  code1 { db close  }
  code2 { db2 close }
  code3 { db3 close }
  forcedelete test.db







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do_multiclient_test tn {
  
  # Close all connections and delete the database.
  #
  code1 { db close  }
  code2 { db2 close }
  code3 { db3 close }
  forcedelete test.db $shmpath
  forcedelete walro
  
  # Do not run tests with the connections in the same process.
  #
  if {$tn==2} continue

  foreach c {code1 code2 code3} {
................................................................................
  } {SQLITE_READONLY_RECOVERY}

  #-----------------------------------------------------------------------
  # Test cases 1.4.* check that checkpoints and log wraps don't prevent
  # read-only connections from reading the database.
  do_test 1.4.1 {
    code1 { db close }
    forcedelete $shmpath
    file exists $shmpath
  } {0}

  # Open one read-only and one read-write connection. Write some data
  # and then run a checkpoint using the read-write connection. Then
  # check the read-only connection can still read.
  do_test 1.4.2 {
    code1 { sqlite3 db file:test.db?readonly_shm=1 }
................................................................................
forcedelete test.db

#-----------------------------------------------------------------------
# Test cases 2.* check that a read-only connection may read the
# database file while a checkpoint operation is ongoing.
#
do_multiclient_test tn {
  # Do not run tests with the connections in the same process.
  #
  if {$tn==2} continue
  
  # Close all connections and delete the database.
  #
  code1 { db close  }
  code2 { db2 close }
  code3 { db3 close }
  forcedelete test.db

Changes to tool/mksqlite3c.tcl.

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   rtree.h
   sqlite3ext.h
   sqlite3.h
   sqliteicu.h
   sqliteInt.h
   sqliteLimit.h
   sqlrr.h

   vdbe.h
   vdbeInt.h
   wal.h
   whereInt.h

} {
  set available_hdr($hdr) 1
}
set available_hdr(sqliteInt.h) 0

# 78 stars used for comment formatting.
set s78 \
................................................................................

   os_unix.c
   os_win.c

   bitvec.c
   pcache.c
   pcache1.c

   rowset.c
   pager.c
   wal.c

   btmutex.c
   btree.c
   backup.c
................................................................................
   fts3_unicode.c
   fts3_unicode2.c

   rtree.c
   icu.c
   fts3_icu.c
   sqlrr.c

} {
  copy_file tsrc/$file
}

close $out







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   rtree.h
   sqlite3ext.h
   sqlite3.h
   sqliteicu.h
   sqliteInt.h
   sqliteLimit.h
   sqlrr.h
   test_intarray.h
   vdbe.h
   vdbeInt.h
   wal.h
   whereInt.h
   sqlite3_private.h
} {
  set available_hdr($hdr) 1
}
set available_hdr(sqliteInt.h) 0

# 78 stars used for comment formatting.
set s78 \
................................................................................

   os_unix.c
   os_win.c

   bitvec.c
   pcache.c
   pcache1.c
   pcache_purgeable.c
   rowset.c
   pager.c
   wal.c

   btmutex.c
   btree.c
   backup.c
................................................................................
   fts3_unicode.c
   fts3_unicode2.c

   rtree.c
   icu.c
   fts3_icu.c
   sqlrr.c
   test_intarray.c
} {
  copy_file tsrc/$file
}

close $out

Changes to tool/warnings.sh.

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#/bin/sh
#
# Run this script in a directory with a working makefile to check for 
# compiler warnings in SQLite.
#
rm -f sqlite3.c
make sqlite3.c




echo '********** No optimizations.  Includes FTS4 and RTREE *********'
gcc -c -Wshadow -Wall -Wextra -pedantic-errors -Wno-long-long -std=c89 \
      -ansi -DHAVE_STDINT_H -DSQLITE_ENABLE_FTS4 -DSQLITE_ENABLE_RTREE \
      sqlite3.c
echo '********** No optimizations. ENABLE_STAT4. THREADSAFE=0 *******'
gcc -c -Wshadow -Wall -Wextra -pedantic-errors -Wno-long-long -std=c89 \
      -ansi -DSQLITE_ENABLE_STAT4 -DSQLITE_THREADSAFE=0 \
      sqlite3.c
echo '********** Optimized -O3.  Includes FTS4 and RTREE ************'
gcc -O3 -c -Wshadow -Wall -Wextra -pedantic-errors -Wno-long-long -std=c89 \
      -ansi -DHAVE_STDINT_H -DSQLITE_ENABLE_FTS4 -DSQLITE_ENABLE_RTREE \
      sqlite3.c







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#/bin/sh
#
# Run this script in a directory with a working makefile to check for 
# compiler warnings in SQLite.
#
rm -f sqlite3.c
make sqlite3.c

# Apple-specific defines used for platform specific feature support
DEFINES="-DSQLITE_OMIT_LOAD_EXTENSION=1 -DSQLITE_ENABLE_LOCKING_STYLE=1 -DSQLITE_ENABLE_AUTO_PROFILE=1 -DUSE_PREAD=1 -DSQLITE_THREADSAFE=2 -DSQLITE_MAX_LENGTH=2147483645 -DSQLITE_MAX_VARIABLE_NUMBER=500000 -DSQLITE_ENABLE_APPLE_SPI=1 -DHAVE_USLEEP=1 -DSQLITE_OMIT_AUTORESET=1 -DSQLITE_ENABLE_PURGEABLE_PCACHE=1 -DSQLITE_DEFAULT_CKPTFULLFSYNC=1 -DSQLITE_DEFAULT_WAL_SAFETYLEVEL=2 -DSQLITE_USE_URI=1 -DSQLITE_WRITE_WALFRAME_PREBUFFERED=1 -DSQLITE_ENABLE_PERSIST_WAL=1 -DUSE_GUARDED_FD=1 -DSQLITE_ENABLE_FLOCKTIMEOUT=1 -DSQLITE_OMIT_BUILTIN_TEST=1 -DSQLITE_DEFAULT_MEMSTATUS=0 -DSQLITE_DEFAULT_PAGE_SIZE=4096 -DSQLITE_DEFAULT_JOURNAL_SIZE_LIMIT=32768 -DSQLITE_DEFAULT_CACHE_SIZE=500 -DSQLITE_ENABLE_RTREE=1 -DSQLITE_ENABLE_FTS3=1 -DSQLITE_ENABLE_FTS3_PARENTHESIS=1"

echo '********** No optimizations.  Includes FTS4 and RTREE *********'
gcc -c -Wshadow -Wall -Wextra -Weverything -Wno-long-long -std=c89 \
      -ansi $DEFINES -DHAVE_STDINT_H -DSQLITE_ENABLE_FTS4 -DSQLITE_ENABLE_RTREE \
      sqlite3.c
echo '********** No optimizations. ENABLE_STAT4. THREADSAFE=0 *******'
gcc -c -Wshadow -Wall -Wextra -Weverything -Wno-long-long -std=c89 \
      -ansi $DEFINES -DSQLITE_ENABLE_STAT4 -DSQLITE_THREADSAFE=0 \
      sqlite3.c
echo '********** Optimized -O3.  Includes FTS4 and RTREE ************'
gcc -O3 -c -Wshadow -Wall -Wextra -Weverything -Wno-long-long -std=c89 \
      -ansi $DEFINES -DHAVE_STDINT_H -DSQLITE_ENABLE_FTS4 -DSQLITE_ENABLE_RTREE \
      sqlite3.c