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Overview
Comment:Add stdio support to the quota VFS.
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: 322bd15f97143d39b3a88d5f6cf7afb454e0666e
User & Date: drh 2011-12-15 17:44:33
Context
2011-12-16
13:42
Merge the nx-devkit changes into trunk. check-in: cf3bccc2 user: drh tags: trunk
13:24
Experimental fix for [a1fa75cbdd]. Closed-Leaf check-in: 6492af76 user: dan tags: experimental
2011-12-15
17:44
Add stdio support to the quota VFS. check-in: 322bd15f user: drh tags: trunk
17:42
Use _commit() rather than FlushFileBuffers() as a substitute for fsync() on windows. Also cast for C++ and add support for SQLITE_FCNTL_VFSNAME. Closed-Leaf check-in: e85cfe9a user: drh tags: quota-stdio
2011-12-14
18:33
Merge the nx-devkit changes into trunk. This includes the new SQLITE_FCNTL_VFSNAME file-control. check-in: da118e02 user: drh tags: trunk
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to src/test_quota.c.

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** However, before returning SQLITE_FULL, the write requests invoke
** a callback function that is configurable for each quota group.
** This callback has the opportunity to enlarge the quota.  If the
** callback does enlarge the quota such that the total size of all
** files within the group is less than the new quota, then the write
** continues as if nothing had happened.
*/
#include "sqlite3.h"
#include <string.h>
#include <assert.h>

/*
** For an build without mutexes, no-op the mutex calls.
*/
#if defined(SQLITE_THREADSAFE) && SQLITE_THREADSAFE==0
................................................................................
** VFS is appended to this structure.
*/
struct quotaConn {
  sqlite3_file base;              /* Base class - must be first */
  quotaFile *pFile;               /* The underlying file */
  /* The underlying VFS sqlite3_file is appended to this object */
};













/************************* Global Variables **********************************/
/*
** All global variables used by this file are containing within the following
** gQuota structure.
*/
static struct {
................................................................................
**      '?'       Matches exactly one character.
**
**     [...]      Matches one character from the enclosed list of
**                characters.
**
**     [^...]     Matches one character not in the enclosed list.
**


*/
static int quotaStrglob(const char *zGlob, const char *z){
  int c, c2;
  int invert;
  int seen;

  while( (c = (*(zGlob++)))!=0 ){
    if( c=='*' ){
      while( (c=(*(zGlob++))) == '*' || c=='?' ){
        if( c=='?' && (*(z++))==0 ) return 0;
................................................................................
        return 1;
      }else if( c=='[' ){
        while( *z && quotaStrglob(zGlob-1,z)==0 ){
          z++;
        }
        return (*z)!=0;
      }

      while( (c2 = (*(z++)))!=0 ){
        while( c2!=c ){
          c2 = *(z++);
          if( c2==0 ) return 0;
        }
        if( quotaStrglob(zGlob,z) ) return 1;
      }
      return 0;
    }else if( c=='?' ){
................................................................................
            seen = 1;
          }
          prior_c = c2;
        }
        c2 = *(zGlob++);
      }
      if( c2==0 || (seen ^ invert)==0 ) return 0;



    }else{
      if( c!=(*(z++)) ) return 0;
    }
  }
  return *z==0;
}

................................................................................
  quotaConn *p = (quotaConn*)pConn;
  return (sqlite3_file*)&p[1];
}

/* Find a file in a quota group and return a pointer to that file.
** Return NULL if the file is not in the group.
*/
static quotaFile *quotaFindFile(quotaGroup *pGroup, const char *zName){




  quotaFile *pFile = pGroup->pFiles;
  while( pFile && strcmp(pFile->zFilename, zName)!=0 ){
    pFile = pFile->pNext;
  }














  return pFile;
}




































































































/************************* VFS Method Wrappers *****************************/
/*
** This is the xOpen method used for the "quota" VFS.
**
** Most of the work is done by the underlying original VFS.  This method
** simply links the new file into the appropriate quota group if it is a
................................................................................
  }else{
    /* If we get to this point, it means the file needs to be quota tracked.
    */
    pQuotaOpen = (quotaConn*)pConn;
    pSubOpen = quotaSubOpen(pConn);
    rc = pOrigVfs->xOpen(pOrigVfs, zName, pSubOpen, flags, pOutFlags);
    if( rc==SQLITE_OK ){
      pFile = quotaFindFile(pGroup, zName);
      if( pFile==0 ){
        int nName = strlen(zName);
        pFile = (quotaFile *)sqlite3_malloc( sizeof(*pFile) + nName + 1 );
        if( pFile==0 ){
          quotaLeave();
          pSubOpen->pMethods->xClose(pSubOpen);
          return SQLITE_NOMEM;
        }
        memset(pFile, 0, sizeof(*pFile));
        pFile->zFilename = (char*)&pFile[1];
        memcpy(pFile->zFilename, zName, nName+1);
        pFile->pNext = pGroup->pFiles;
        if( pGroup->pFiles ) pGroup->pFiles->ppPrev = &pFile->pNext;
        pFile->ppPrev = &pGroup->pFiles;
        pGroup->pFiles = pFile;
        pFile->pGroup = pGroup;
        pFile->deleteOnClose = (flags & SQLITE_OPEN_DELETEONCLOSE)!=0;
      }
      pFile->nRef++;
      pQuotaOpen->pFile = pFile;
      if( pSubOpen->pMethods->iVersion==1 ){
        pQuotaOpen->base.pMethods = &gQuota.sIoMethodsV1;
      }else{
        pQuotaOpen->base.pMethods = &gQuota.sIoMethodsV2;
      }
................................................................................
  /* If the file just deleted is a member of a quota group, then remove
  ** it from that quota group.
  */
  if( rc==SQLITE_OK ){
    quotaEnter();
    pGroup = quotaGroupFind(zName);
    if( pGroup ){
      pFile = quotaFindFile(pGroup, zName);
      if( pFile ){
        if( pFile->nRef ){
          pFile->deleteOnClose = 1;
        }else{
          quotaRemoveFile(pFile);
          quotaGroupDeref(pGroup);
        }
................................................................................
  sqlite3_file *pSubOpen = quotaSubOpen(pConn);
  int rc;
  rc = pSubOpen->pMethods->xClose(pSubOpen);
  quotaEnter();
  pFile->nRef--;
  if( pFile->nRef==0 ){
    quotaGroup *pGroup = pFile->pGroup;
    if( pFile->deleteOnClose ) quotaRemoveFile(pFile);



    quotaGroupDeref(pGroup);
  }
  quotaLeave();
  return rc;
}

/* Pass xRead requests directory thru to the original VFS without
................................................................................
}

/* Pass xFileControl requests through to the original VFS unchanged.
*/
static int quotaFileControl(sqlite3_file *pConn, int op, void *pArg){
  sqlite3_file *pSubOpen = quotaSubOpen(pConn);
  int rc = pSubOpen->pMethods->xFileControl(pSubOpen, op, pArg);

  if( op==SQLITE_FCNTL_VFSNAME && rc==SQLITE_OK ){
    *(char**)pArg = sqlite3_mprintf("quota/%z", *(char**)pArg);
  }

  return rc;
}

/* Pass xSectorSize requests through to the original VFS unchanged.
*/
static int quotaSectorSize(sqlite3_file *pConn){
  sqlite3_file *pSubOpen = quotaSubOpen(pConn);
................................................................................
*/
int sqlite3_quota_file(const char *zFilename){
  char *zFull;
  sqlite3_file *fd;
  int rc;
  int outFlags = 0;
  sqlite3_int64 iSize;
  fd = sqlite3_malloc(gQuota.sThisVfs.szOsFile + gQuota.sThisVfs.mxPathname+1);

  if( fd==0 ) return SQLITE_NOMEM;
  zFull = gQuota.sThisVfs.szOsFile + (char*)fd;
  rc = gQuota.pOrigVfs->xFullPathname(gQuota.pOrigVfs, zFilename,
                                      gQuota.sThisVfs.mxPathname+1, zFull);
  if( rc==SQLITE_OK ){
    rc = quotaOpen(&gQuota.sThisVfs, zFull, fd, 
                   SQLITE_OPEN_READONLY | SQLITE_OPEN_MAIN_DB, &outFlags);
................................................................................
    fd->pMethods->xClose(fd);
  }else if( rc==SQLITE_CANTOPEN ){
    quotaGroup *pGroup;
    quotaFile *pFile;
    quotaEnter();
    pGroup = quotaGroupFind(zFull);
    if( pGroup ){
      pFile = quotaFindFile(pGroup, zFull);
      if( pFile ) quotaRemoveFile(pFile);
    }
    quotaLeave();
  }
  sqlite3_free(fd);
  return rc;
}























































































































































































































  
/***************************** Test Code ***********************************/
#ifdef SQLITE_TEST
#include <tcl.h>

/*
** Argument passed to a TCL quota-over-limit callback.
................................................................................
    Tcl_ListObjAppendElement(interp, pGroupTerm,
          Tcl_NewStringObj(pGroup->zPattern, -1));
    Tcl_ListObjAppendElement(interp, pGroupTerm,
          Tcl_NewWideIntObj(pGroup->iLimit));
    Tcl_ListObjAppendElement(interp, pGroupTerm,
          Tcl_NewWideIntObj(pGroup->iSize));
    for(pFile=pGroup->pFiles; pFile; pFile=pFile->pNext){


      pFileTerm = Tcl_NewObj();


      Tcl_ListObjAppendElement(interp, pFileTerm,
            Tcl_NewStringObj(pFile->zFilename, -1));
      Tcl_ListObjAppendElement(interp, pFileTerm,
            Tcl_NewWideIntObj(pFile->iSize));
      Tcl_ListObjAppendElement(interp, pFileTerm,
            Tcl_NewWideIntObj(pFile->nRef));
      Tcl_ListObjAppendElement(interp, pFileTerm,
            Tcl_NewWideIntObj(pFile->deleteOnClose));
      Tcl_ListObjAppendElement(interp, pGroupTerm, pFileTerm);
................................................................................
    }
    Tcl_ListObjAppendElement(interp, pResult, pGroupTerm);
  }
  quotaLeave();
  Tcl_SetObjResult(interp, pResult);
  return TCL_OK;
}

/*










































































































































































































































































** This routine registers the custom TCL commands defined in this
** module.  This should be the only procedure visible from outside
** of this module.
*/
int Sqlitequota_Init(Tcl_Interp *interp){
  static struct {
     char *zName;
     Tcl_ObjCmdProc *xProc;
  } aCmd[] = {
    { "sqlite3_quota_initialize", test_quota_initialize },
    { "sqlite3_quota_shutdown", test_quota_shutdown },
    { "sqlite3_quota_set", test_quota_set },
    { "sqlite3_quota_file", test_quota_file },
    { "sqlite3_quota_dump", test_quota_dump },










  };
  int i;

  for(i=0; i<sizeof(aCmd)/sizeof(aCmd[0]); i++){
    Tcl_CreateObjCommand(interp, aCmd[i].zName, aCmd[i].xProc, 0, 0);
  }

  return TCL_OK;
}
#endif







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** However, before returning SQLITE_FULL, the write requests invoke
** a callback function that is configurable for each quota group.
** This callback has the opportunity to enlarge the quota.  If the
** callback does enlarge the quota such that the total size of all
** files within the group is less than the new quota, then the write
** continues as if nothing had happened.
*/
#include "test_quota.h"
#include <string.h>
#include <assert.h>

/*
** For an build without mutexes, no-op the mutex calls.
*/
#if defined(SQLITE_THREADSAFE) && SQLITE_THREADSAFE==0
................................................................................
** VFS is appended to this structure.
*/
struct quotaConn {
  sqlite3_file base;              /* Base class - must be first */
  quotaFile *pFile;               /* The underlying file */
  /* The underlying VFS sqlite3_file is appended to this object */
};

/*
** An instance of the following object records the state of an
** open file.  This object is opaque to all users - the internal
** structure is only visible to the functions below.
*/
struct quota_FILE {
  FILE *f;                /* Open stdio file pointer */
  sqlite3_int64 iOfst;    /* Current offset into the file */
  quotaFile *pFile;       /* The file record in the quota system */
};


/************************* Global Variables **********************************/
/*
** All global variables used by this file are containing within the following
** gQuota structure.
*/
static struct {
................................................................................
**      '?'       Matches exactly one character.
**
**     [...]      Matches one character from the enclosed list of
**                characters.
**
**     [^...]     Matches one character not in the enclosed list.
**
**     /          Matches "/" or "\\"
**
*/
static int quotaStrglob(const char *zGlob, const char *z){
  int c, c2, cx;
  int invert;
  int seen;

  while( (c = (*(zGlob++)))!=0 ){
    if( c=='*' ){
      while( (c=(*(zGlob++))) == '*' || c=='?' ){
        if( c=='?' && (*(z++))==0 ) return 0;
................................................................................
        return 1;
      }else if( c=='[' ){
        while( *z && quotaStrglob(zGlob-1,z)==0 ){
          z++;
        }
        return (*z)!=0;
      }
      cx = (c=='/') ? '\\' : c;
      while( (c2 = (*(z++)))!=0 ){
        while( c2!=c && c2!=cx ){
          c2 = *(z++);
          if( c2==0 ) return 0;
        }
        if( quotaStrglob(zGlob,z) ) return 1;
      }
      return 0;
    }else if( c=='?' ){
................................................................................
            seen = 1;
          }
          prior_c = c2;
        }
        c2 = *(zGlob++);
      }
      if( c2==0 || (seen ^ invert)==0 ) return 0;
    }else if( c=='/' ){
      if( z[0]!='/' && z[0]!='\\' ) return 0;
      z++;
    }else{
      if( c!=(*(z++)) ) return 0;
    }
  }
  return *z==0;
}

................................................................................
  quotaConn *p = (quotaConn*)pConn;
  return (sqlite3_file*)&p[1];
}

/* Find a file in a quota group and return a pointer to that file.
** Return NULL if the file is not in the group.
*/
static quotaFile *quotaFindFile(
  quotaGroup *pGroup,     /* Group in which to look for the file */
  const char *zName,      /* Full pathname of the file */
  int createFlag          /* Try to create the file if not found */
){
  quotaFile *pFile = pGroup->pFiles;
  while( pFile && strcmp(pFile->zFilename, zName)!=0 ){
    pFile = pFile->pNext;
  }
  if( pFile==0 && createFlag ){
    int nName = strlen(zName);
    pFile = (quotaFile *)sqlite3_malloc( sizeof(*pFile) + nName + 1 );
    if( pFile ){
      memset(pFile, 0, sizeof(*pFile));
      pFile->zFilename = (char*)&pFile[1];
      memcpy(pFile->zFilename, zName, nName+1);
      pFile->pNext = pGroup->pFiles;
      if( pGroup->pFiles ) pGroup->pFiles->ppPrev = &pFile->pNext;
      pFile->ppPrev = &pGroup->pFiles;
      pGroup->pFiles = pFile;
      pFile->pGroup = pGroup;
    }
  }
  return pFile;
}

/*
** Figure out if we are dealing with Unix, Windows, or some other
** operating system.  After the following block of preprocess macros,
** all of SQLITE_OS_UNIX, SQLITE_OS_WIN, SQLITE_OS_OS2, and SQLITE_OS_OTHER 
** will defined to either 1 or 0.  One of the four will be 1.  The other 
** three will be 0.
*/
#if defined(SQLITE_OS_OTHER)
# if SQLITE_OS_OTHER==1
#   undef SQLITE_OS_UNIX
#   define SQLITE_OS_UNIX 0
#   undef SQLITE_OS_WIN
#   define SQLITE_OS_WIN 0
#   undef SQLITE_OS_OS2
#   define SQLITE_OS_OS2 0
# else
#   undef SQLITE_OS_OTHER
# endif
#endif
#if !defined(SQLITE_OS_UNIX) && !defined(SQLITE_OS_OTHER)
# define SQLITE_OS_OTHER 0
# ifndef SQLITE_OS_WIN
#   if defined(_WIN32) || defined(WIN32) || defined(__CYGWIN__) \
                       || defined(__MINGW32__) || defined(__BORLANDC__)
#     define SQLITE_OS_WIN 1
#     define SQLITE_OS_UNIX 0
#     define SQLITE_OS_OS2 0
#   elif defined(__EMX__) || defined(_OS2) || defined(OS2) \
                          || defined(_OS2_) || defined(__OS2__)
#     define SQLITE_OS_WIN 0
#     define SQLITE_OS_UNIX 0
#     define SQLITE_OS_OS2 1
#   else
#     define SQLITE_OS_WIN 0
#     define SQLITE_OS_UNIX 1
#     define SQLITE_OS_OS2 0
#  endif
# else
#  define SQLITE_OS_UNIX 0
#  define SQLITE_OS_OS2 0
# endif
#else
# ifndef SQLITE_OS_WIN
#  define SQLITE_OS_WIN 0
# endif
#endif

#if SQLITE_OS_UNIX
# include <unistd.h>
#endif
#if SQLITE_OS_WIN
# include <windows.h>
# include <io.h>
#endif

/*
** Translate UTF8 to MBCS for use in fopen() calls.  Return a pointer to the
** translated text..  Call quota_mbcs_free() to deallocate any memory
** used to store the returned pointer when done.
*/
static char *quota_utf8_to_mbcs(const char *zUtf8){
#if SQLITE_OS_WIN
  int n;             /* Bytes in zUtf8 */
  int nWide;         /* number of UTF-16 characters */
  int nMbcs;         /* Bytes of MBCS */
  LPWSTR zTmpWide;   /* The UTF16 text */
  char *zMbcs;       /* The MBCS text */
  int codepage;      /* Code page used by fopen() */

  n = strlen(zUtf8);
  nWide = MultiByteToWideChar(CP_UTF8, 0, zUtf8, -1, NULL, 0);
  if( nWide==0 ) return 0;
  zTmpWide = (LPWSTR)sqlite3_malloc( (nWide+1)*sizeof(zTmpWide[0]) );
  if( zTmpWide==0 ) return 0;
  MultiByteToWideChar(CP_UTF8, 0, zUtf8, -1, zTmpWide, nWide);
  codepage = AreFileApisANSI() ? CP_ACP : CP_OEMCP;
  nMbcs = WideCharToMultiByte(codepage, 0, zTmpWide, nWide, 0, 0, 0, 0);
  zMbcs = nMbcs ? (char*)sqlite3_malloc( nMbcs+1 ) : 0;
  if( zMbcs ){
    WideCharToMultiByte(codepage, 0, zTmpWide, nWide, zMbcs, nMbcs, 0, 0);
  }
  sqlite3_free(zTmpWide);
  return zMbcs;
#else
  return (char*)zUtf8;  /* No-op on unix */
#endif  
}

/*
** Deallocate any memory allocated by quota_utf8_to_mbcs().
*/
static void quota_mbcs_free(char *zOld){
#if SQLITE_OS_WIN
  sqlite3_free(zOld);
#else
  /* No-op on unix */
#endif  
}

/************************* VFS Method Wrappers *****************************/
/*
** This is the xOpen method used for the "quota" VFS.
**
** Most of the work is done by the underlying original VFS.  This method
** simply links the new file into the appropriate quota group if it is a
................................................................................
  }else{
    /* If we get to this point, it means the file needs to be quota tracked.
    */
    pQuotaOpen = (quotaConn*)pConn;
    pSubOpen = quotaSubOpen(pConn);
    rc = pOrigVfs->xOpen(pOrigVfs, zName, pSubOpen, flags, pOutFlags);
    if( rc==SQLITE_OK ){
      pFile = quotaFindFile(pGroup, zName, 1);
      if( pFile==0 ){



        quotaLeave();
        pSubOpen->pMethods->xClose(pSubOpen);
        return SQLITE_NOMEM;
      }








      pFile->deleteOnClose = (flags & SQLITE_OPEN_DELETEONCLOSE)!=0;

      pFile->nRef++;
      pQuotaOpen->pFile = pFile;
      if( pSubOpen->pMethods->iVersion==1 ){
        pQuotaOpen->base.pMethods = &gQuota.sIoMethodsV1;
      }else{
        pQuotaOpen->base.pMethods = &gQuota.sIoMethodsV2;
      }
................................................................................
  /* If the file just deleted is a member of a quota group, then remove
  ** it from that quota group.
  */
  if( rc==SQLITE_OK ){
    quotaEnter();
    pGroup = quotaGroupFind(zName);
    if( pGroup ){
      pFile = quotaFindFile(pGroup, zName, 0);
      if( pFile ){
        if( pFile->nRef ){
          pFile->deleteOnClose = 1;
        }else{
          quotaRemoveFile(pFile);
          quotaGroupDeref(pGroup);
        }
................................................................................
  sqlite3_file *pSubOpen = quotaSubOpen(pConn);
  int rc;
  rc = pSubOpen->pMethods->xClose(pSubOpen);
  quotaEnter();
  pFile->nRef--;
  if( pFile->nRef==0 ){
    quotaGroup *pGroup = pFile->pGroup;
    if( pFile->deleteOnClose ){
      gQuota.pOrigVfs->xDelete(gQuota.pOrigVfs, pFile->zFilename, 0);
      quotaRemoveFile(pFile);
    }
    quotaGroupDeref(pGroup);
  }
  quotaLeave();
  return rc;
}

/* Pass xRead requests directory thru to the original VFS without
................................................................................
}

/* Pass xFileControl requests through to the original VFS unchanged.
*/
static int quotaFileControl(sqlite3_file *pConn, int op, void *pArg){
  sqlite3_file *pSubOpen = quotaSubOpen(pConn);
  int rc = pSubOpen->pMethods->xFileControl(pSubOpen, op, pArg);
#if defined(SQLITE_FCNTL_VFSNAME)
  if( op==SQLITE_FCNTL_VFSNAME && rc==SQLITE_OK ){
    *(char**)pArg = sqlite3_mprintf("quota/%z", *(char**)pArg);
  }
#endif
  return rc;
}

/* Pass xSectorSize requests through to the original VFS unchanged.
*/
static int quotaSectorSize(sqlite3_file *pConn){
  sqlite3_file *pSubOpen = quotaSubOpen(pConn);
................................................................................
*/
int sqlite3_quota_file(const char *zFilename){
  char *zFull;
  sqlite3_file *fd;
  int rc;
  int outFlags = 0;
  sqlite3_int64 iSize;
  fd = (sqlite3_file*)sqlite3_malloc(gQuota.sThisVfs.szOsFile +
                                     gQuota.sThisVfs.mxPathname+1);
  if( fd==0 ) return SQLITE_NOMEM;
  zFull = gQuota.sThisVfs.szOsFile + (char*)fd;
  rc = gQuota.pOrigVfs->xFullPathname(gQuota.pOrigVfs, zFilename,
                                      gQuota.sThisVfs.mxPathname+1, zFull);
  if( rc==SQLITE_OK ){
    rc = quotaOpen(&gQuota.sThisVfs, zFull, fd, 
                   SQLITE_OPEN_READONLY | SQLITE_OPEN_MAIN_DB, &outFlags);
................................................................................
    fd->pMethods->xClose(fd);
  }else if( rc==SQLITE_CANTOPEN ){
    quotaGroup *pGroup;
    quotaFile *pFile;
    quotaEnter();
    pGroup = quotaGroupFind(zFull);
    if( pGroup ){
      pFile = quotaFindFile(pGroup, zFull, 0);
      if( pFile ) quotaRemoveFile(pFile);
    }
    quotaLeave();
  }
  sqlite3_free(fd);
  return rc;
}

/*
** Open a potentially quotaed file for I/O.
*/
quota_FILE *sqlite3_quota_fopen(const char *zFilename, const char *zMode){
  quota_FILE *p = 0;
  char *zFull = 0;
  char *zFullTranslated;
  int rc;
  quotaGroup *pGroup;
  quotaFile *pFile;

  zFull = (char*)sqlite3_malloc(gQuota.sThisVfs.mxPathname + 1);
  if( zFull==0 ) return 0;
  rc = gQuota.pOrigVfs->xFullPathname(gQuota.pOrigVfs, zFilename,
                                      gQuota.sThisVfs.mxPathname+1, zFull);
  if( rc ) goto quota_fopen_error;
  p = (quota_FILE*)sqlite3_malloc(sizeof(*p));
  if( p==0 ) goto quota_fopen_error;
  memset(p, 0, sizeof(*p));
  zFullTranslated = quota_utf8_to_mbcs(zFull);
  if( zFullTranslated==0 ) goto quota_fopen_error;
  p->f = fopen(zFullTranslated, zMode);
  quota_mbcs_free(zFullTranslated);
  if( p->f==0 ) goto quota_fopen_error;
  quotaEnter();
  pGroup = quotaGroupFind(zFull);
  if( pGroup ){
    pFile = quotaFindFile(pGroup, zFull, 1);
    if( pFile==0 ){
      quotaLeave();
      goto quota_fopen_error;
    }
    pFile->nRef++;
    p->pFile = pFile;
  }
  quotaLeave();
  sqlite3_free(zFull);
  return p;

quota_fopen_error:
  sqlite3_free(zFull);
  if( p && p->f ) fclose(p->f);
  sqlite3_free(p);
  return 0;
}

/*
** Read content from a quota_FILE
*/
size_t sqlite3_quota_fread(
  void *pBuf,            /* Store the content here */
  size_t size,           /* Size of each element */
  size_t nmemb,          /* Number of elements to read */
  quota_FILE *p          /* Read from this quota_FILE object */
){
  return fread(pBuf, size, nmemb, p->f);
}

/*
** Write content into a quota_FILE.  Invoke the quota callback and block
** the write if we exceed quota.
*/
size_t sqlite3_quota_fwrite(
  void *pBuf,            /* Take content to write from here */
  size_t size,           /* Size of each element */
  size_t nmemb,          /* Number of elements */
  quota_FILE *p          /* Write to this quota_FILE objecct */
){
  sqlite3_int64 iOfst;
  sqlite3_int64 iEnd;
  sqlite3_int64 szNew;
  quotaFile *pFile;
  
  iOfst = ftell(p->f);
  iEnd = iOfst + size*nmemb;
  pFile = p->pFile;
  if( pFile && pFile->iSize<iEnd ){
    quotaGroup *pGroup = pFile->pGroup;
    quotaEnter();
    szNew = pGroup->iSize - pFile->iSize + iEnd;
    if( szNew>pGroup->iLimit && pGroup->iLimit>0 ){
      if( pGroup->xCallback ){
        pGroup->xCallback(pFile->zFilename, &pGroup->iLimit, szNew, 
                          pGroup->pArg);
      }
      if( szNew>pGroup->iLimit && pGroup->iLimit>0 ){
        iEnd = pGroup->iLimit - pGroup->iSize + pFile->iSize;
        nmemb = (iEnd - iOfst)/size;
        iEnd = iOfst + size*nmemb;
        szNew = pGroup->iSize - pFile->iSize + iEnd;
      }
    }
    pGroup->iSize = szNew;
    pFile->iSize = iEnd;
    quotaLeave();
  }
  return fwrite(pBuf, size, nmemb, p->f);
}

/*
** Close an open quota_FILE stream.
*/
int sqlite3_quota_fclose(quota_FILE *p){
  int rc;
  quotaFile *pFile;
  rc = fclose(p->f);
  pFile = p->pFile;
  if( pFile ){
    quotaEnter();
    pFile->nRef--;
    if( pFile->nRef==0 ){
      quotaGroup *pGroup = pFile->pGroup;
      if( pFile->deleteOnClose ){
        gQuota.pOrigVfs->xDelete(gQuota.pOrigVfs, pFile->zFilename, 0);
        quotaRemoveFile(pFile);
      }
      quotaGroupDeref(pGroup);
    }
    quotaLeave();
  }
  sqlite3_free(p);
  return rc;
}

/*
** Flush memory buffers for a quota_FILE to disk.
*/
int sqlite3_quota_fflush(quota_FILE *p, int doFsync){
  int rc;
  rc = fflush(p->f);
  if( rc==0 && doFsync ){
#if SQLITE_OS_UNIX
    rc = fsync(fileno(p->f));
#endif
#if SQLITE_OS_WIN
    rc = _commit(_fileno(p->f));
#endif
  }
  return rc!=0;
}

/*
** Seek on a quota_FILE stream.
*/
int sqlite3_quota_fseek(quota_FILE *p, long offset, int whence){
  return fseek(p->f, offset, whence);
}

/*
** rewind a quota_FILE stream.
*/
void sqlite3_quota_rewind(quota_FILE *p){
  rewind(p->f);
}

/*
** Tell the current location of a quota_FILE stream.
*/
long sqlite3_quota_ftell(quota_FILE *p){
  return ftell(p->f);
}

/*
** Remove a managed file.  Update quotas accordingly.
*/
int sqlite3_quota_remove(const char *zFilename){
  char *zFull;            /* Full pathname for zFilename */
  int nFull;              /* Number of bytes in zFilename */
  int rc;                 /* Result code */
  quotaGroup *pGroup;     /* Group containing zFilename */
  quotaFile *pFile;       /* A file in the group */
  quotaFile *pNextFile;   /* next file in the group */
  int diff;               /* Difference between filenames */
  char c;                 /* First character past end of pattern */

  zFull = (char*)sqlite3_malloc(gQuota.sThisVfs.mxPathname + 1);
  if( zFull==0 ) return SQLITE_NOMEM;
  rc = gQuota.pOrigVfs->xFullPathname(gQuota.pOrigVfs, zFilename,
                                      gQuota.sThisVfs.mxPathname+1, zFull);
  if( rc ){
    sqlite3_free(zFull);
    return rc;
  }

  /* Figure out the length of the full pathname.  If the name ends with
  ** / (or \ on windows) then remove the trailing /.
  */
  nFull = strlen(zFull);
  if( nFull>0 && (zFull[nFull-1]=='/' || zFull[nFull-1]=='\\') ){
    nFull--;
    zFull[nFull] = 0;
  }

  quotaEnter();
  pGroup = quotaGroupFind(zFull);
  if( pGroup ){
    for(pFile=pGroup->pFiles; pFile && rc==SQLITE_OK; pFile=pNextFile){
      pNextFile = pFile->pNext;
      diff = memcmp(zFull, pFile->zFilename, nFull);
      if( diff==0 && ((c = pFile->zFilename[nFull])==0 || c=='/' || c=='\\') ){
        if( pFile->nRef ){
          pFile->deleteOnClose = 1;
        }else{
          rc = gQuota.pOrigVfs->xDelete(gQuota.pOrigVfs, pFile->zFilename, 0);
          quotaRemoveFile(pFile);
          quotaGroupDeref(pGroup);
        }
      }
    }
  }
  quotaLeave();
  sqlite3_free(zFull);
  return rc;
}
  
/***************************** Test Code ***********************************/
#ifdef SQLITE_TEST
#include <tcl.h>

/*
** Argument passed to a TCL quota-over-limit callback.
................................................................................
    Tcl_ListObjAppendElement(interp, pGroupTerm,
          Tcl_NewStringObj(pGroup->zPattern, -1));
    Tcl_ListObjAppendElement(interp, pGroupTerm,
          Tcl_NewWideIntObj(pGroup->iLimit));
    Tcl_ListObjAppendElement(interp, pGroupTerm,
          Tcl_NewWideIntObj(pGroup->iSize));
    for(pFile=pGroup->pFiles; pFile; pFile=pFile->pNext){
      int i;
      char zTemp[1000];
      pFileTerm = Tcl_NewObj();
      sqlite3_snprintf(sizeof(zTemp), zTemp, "%s", pFile->zFilename);
      for(i=0; zTemp[i]; i++){ if( zTemp[i]=='\\' ) zTemp[i] = '/'; }
      Tcl_ListObjAppendElement(interp, pFileTerm,
            Tcl_NewStringObj(zTemp, -1));
      Tcl_ListObjAppendElement(interp, pFileTerm,
            Tcl_NewWideIntObj(pFile->iSize));
      Tcl_ListObjAppendElement(interp, pFileTerm,
            Tcl_NewWideIntObj(pFile->nRef));
      Tcl_ListObjAppendElement(interp, pFileTerm,
            Tcl_NewWideIntObj(pFile->deleteOnClose));
      Tcl_ListObjAppendElement(interp, pGroupTerm, pFileTerm);
................................................................................
    }
    Tcl_ListObjAppendElement(interp, pResult, pGroupTerm);
  }
  quotaLeave();
  Tcl_SetObjResult(interp, pResult);
  return TCL_OK;
}

/*
** tclcmd: sqlite3_quota_fopen FILENAME MODE
*/
static int test_quota_fopen(
  void * clientData,
  Tcl_Interp *interp,
  int objc,
  Tcl_Obj *CONST objv[]
){
  const char *zFilename;          /* File pattern to configure */
  const char *zMode;              /* Mode string */
  quota_FILE *p;                  /* Open string object */
  char zReturn[50];               /* Name of pointer to return */

  /* Process arguments */
  if( objc!=3 ){
    Tcl_WrongNumArgs(interp, 1, objv, "FILENAME MODE");
    return TCL_ERROR;
  }
  zFilename = Tcl_GetString(objv[1]);
  zMode = Tcl_GetString(objv[2]);
  p = sqlite3_quota_fopen(zFilename, zMode);
  sqlite3_snprintf(sizeof(zReturn), zReturn, "%p", p);
  Tcl_SetResult(interp, zReturn, TCL_VOLATILE);
  return TCL_OK;
}

/* Defined in test1.c */
extern void *sqlite3TestTextToPtr(const char*);

/*
** tclcmd: sqlite3_quota_fread HANDLE SIZE NELEM
*/
static int test_quota_fread(
  void * clientData,
  Tcl_Interp *interp,
  int objc,
  Tcl_Obj *CONST objv[]
){
  quota_FILE *p;
  char *zBuf;
  int sz;
  int nElem;
  int got;

  if( objc!=4 ){
    Tcl_WrongNumArgs(interp, 1, objv, "HANDLE SIZE NELEM");
    return TCL_ERROR;
  }
  p = sqlite3TestTextToPtr(Tcl_GetString(objv[1]));
  if( Tcl_GetIntFromObj(interp, objv[2], &sz) ) return TCL_ERROR;
  if( Tcl_GetIntFromObj(interp, objv[3], &nElem) ) return TCL_ERROR;
  zBuf = (char*)sqlite3_malloc( sz*nElem + 1 );
  if( zBuf==0 ){
    Tcl_SetResult(interp, "out of memory", TCL_STATIC);
    return TCL_ERROR;
  }
  got = sqlite3_quota_fread(zBuf, sz, nElem, p);
  if( got<0 ) got = 0;
  zBuf[got*sz] = 0;
  Tcl_SetResult(interp, zBuf, TCL_VOLATILE);
  sqlite3_free(zBuf);
  return TCL_OK;
}

/*
** tclcmd: sqlite3_quota_fwrite HANDLE SIZE NELEM CONTENT
*/
static int test_quota_fwrite(
  void * clientData,
  Tcl_Interp *interp,
  int objc,
  Tcl_Obj *CONST objv[]
){
  quota_FILE *p;
  char *zBuf;
  int sz;
  int nElem;
  int got;

  if( objc!=5 ){
    Tcl_WrongNumArgs(interp, 1, objv, "HANDLE SIZE NELEM CONTENT");
    return TCL_ERROR;
  }
  p = sqlite3TestTextToPtr(Tcl_GetString(objv[1]));
  if( Tcl_GetIntFromObj(interp, objv[2], &sz) ) return TCL_ERROR;
  if( Tcl_GetIntFromObj(interp, objv[3], &nElem) ) return TCL_ERROR;
  zBuf = Tcl_GetString(objv[4]);
  got = sqlite3_quota_fwrite(zBuf, sz, nElem, p);
  Tcl_SetObjResult(interp, Tcl_NewIntObj(got));
  return TCL_OK;
}

/*
** tclcmd: sqlite3_quota_fclose HANDLE
*/
static int test_quota_fclose(
  void * clientData,
  Tcl_Interp *interp,
  int objc,
  Tcl_Obj *CONST objv[]
){
  quota_FILE *p;
  int rc;

  if( objc!=2 ){
    Tcl_WrongNumArgs(interp, 1, objv, "HANDLE");
    return TCL_ERROR;
  }
  p = sqlite3TestTextToPtr(Tcl_GetString(objv[1]));
  rc = sqlite3_quota_fclose(p);
  Tcl_SetObjResult(interp, Tcl_NewIntObj(rc));
  return TCL_OK;
}

/*
** tclcmd: sqlite3_quota_fflush HANDLE ?HARDSYNC?
*/
static int test_quota_fflush(
  void * clientData,
  Tcl_Interp *interp,
  int objc,
  Tcl_Obj *CONST objv[]
){
  quota_FILE *p;
  int rc;
  int doSync = 0;

  if( objc!=2 && objc!=3 ){
    Tcl_WrongNumArgs(interp, 1, objv, "HANDLE ?HARDSYNC?");
    return TCL_ERROR;
  }
  p = sqlite3TestTextToPtr(Tcl_GetString(objv[1]));
  if( objc==3 ){
    if( Tcl_GetBooleanFromObj(interp, objv[2], &doSync) ) return TCL_ERROR;
  }
  rc = sqlite3_quota_fflush(p, doSync);
  Tcl_SetObjResult(interp, Tcl_NewIntObj(rc));
  return TCL_OK;
}

/*
** tclcmd: sqlite3_quota_fseek HANDLE OFFSET WHENCE
*/
static int test_quota_fseek(
  void * clientData,
  Tcl_Interp *interp,
  int objc,
  Tcl_Obj *CONST objv[]
){
  quota_FILE *p;
  int ofst;
  const char *zWhence;
  int whence;
  int rc;

  if( objc!=4 ){
    Tcl_WrongNumArgs(interp, 1, objv, "HANDLE OFFSET WHENCE");
    return TCL_ERROR;
  }
  p = sqlite3TestTextToPtr(Tcl_GetString(objv[1]));
  if( Tcl_GetIntFromObj(interp, objv[2], &ofst) ) return TCL_ERROR;
  zWhence = Tcl_GetString(objv[3]);
  if( strcmp(zWhence, "SEEK_SET")==0 ){
    whence = SEEK_SET;
  }else if( strcmp(zWhence, "SEEK_CUR")==0 ){
    whence = SEEK_CUR;
  }else if( strcmp(zWhence, "SEEK_END")==0 ){
    whence = SEEK_END;
  }else{
    Tcl_AppendResult(interp,
           "WHENCE should be SEEK_SET, SEEK_CUR, or SEEK_END", (char*)0);
    return TCL_ERROR;
  }
  rc = sqlite3_quota_fseek(p, ofst, whence);
  Tcl_SetObjResult(interp, Tcl_NewIntObj(rc));
  return TCL_OK;
}

/*
** tclcmd: sqlite3_quota_rewind HANDLE
*/
static int test_quota_rewind(
  void * clientData,
  Tcl_Interp *interp,
  int objc,
  Tcl_Obj *CONST objv[]
){
  quota_FILE *p;
  if( objc!=2 ){
    Tcl_WrongNumArgs(interp, 1, objv, "HANDLE");
    return TCL_ERROR;
  }
  p = sqlite3TestTextToPtr(Tcl_GetString(objv[1]));
  sqlite3_quota_rewind(p);
  return TCL_OK;
}

/*
** tclcmd: sqlite3_quota_ftell HANDLE
*/
static int test_quota_ftell(
  void * clientData,
  Tcl_Interp *interp,
  int objc,
  Tcl_Obj *CONST objv[]
){
  quota_FILE *p;
  sqlite3_int64 x;
  if( objc!=2 ){
    Tcl_WrongNumArgs(interp, 1, objv, "HANDLE");
    return TCL_ERROR;
  }
  p = sqlite3TestTextToPtr(Tcl_GetString(objv[1]));
  x = sqlite3_quota_ftell(p);
  Tcl_SetObjResult(interp, Tcl_NewWideIntObj(x));
  return TCL_OK;
}

/*
** tclcmd: sqlite3_quota_remove FILENAME
*/
static int test_quota_remove(
  void * clientData,
  Tcl_Interp *interp,
  int objc,
  Tcl_Obj *CONST objv[]
){
  const char *zFilename;          /* File pattern to configure */
  int rc;
  if( objc!=2 ){
    Tcl_WrongNumArgs(interp, 1, objv, "FILENAME");
    return TCL_ERROR;
  }
  zFilename = Tcl_GetString(objv[1]);
  rc = sqlite3_quota_remove(zFilename);
  Tcl_SetObjResult(interp, Tcl_NewIntObj(rc));
  return TCL_OK;
}

/*
** tclcmd: sqlite3_quota_glob PATTERN TEXT
**
** Test the glob pattern matching.  Return 1 if TEXT matches PATTERN
** and return 0 if it does not.
*/
static int test_quota_glob(
  void * clientData,
  Tcl_Interp *interp,
  int objc,
  Tcl_Obj *CONST objv[]
){
  const char *zPattern;          /* The glob pattern */
  const char *zText;             /* Text to compare agains the pattern */
  int rc;
  if( objc!=3 ){
    Tcl_WrongNumArgs(interp, 1, objv, "PATTERN TEXT");
    return TCL_ERROR;
  }
  zPattern = Tcl_GetString(objv[1]);
  zText = Tcl_GetString(objv[2]);
  rc = quotaStrglob(zPattern, zText);
  Tcl_SetObjResult(interp, Tcl_NewIntObj(rc));
  return TCL_OK;
}

/*
** This routine registers the custom TCL commands defined in this
** module.  This should be the only procedure visible from outside
** of this module.
*/
int Sqlitequota_Init(Tcl_Interp *interp){
  static struct {
     char *zName;
     Tcl_ObjCmdProc *xProc;
  } aCmd[] = {
    { "sqlite3_quota_initialize", test_quota_initialize },
    { "sqlite3_quota_shutdown",   test_quota_shutdown },
    { "sqlite3_quota_set",        test_quota_set },
    { "sqlite3_quota_file",       test_quota_file },
    { "sqlite3_quota_dump",       test_quota_dump },
    { "sqlite3_quota_fopen",      test_quota_fopen },
    { "sqlite3_quota_fread",      test_quota_fread },
    { "sqlite3_quota_fwrite",     test_quota_fwrite },
    { "sqlite3_quota_fclose",     test_quota_fclose },
    { "sqlite3_quota_fflush",     test_quota_fflush },
    { "sqlite3_quota_fseek",      test_quota_fseek },
    { "sqlite3_quota_rewind",     test_quota_rewind },
    { "sqlite3_quota_ftell",      test_quota_ftell },
    { "sqlite3_quota_remove",     test_quota_remove },
    { "sqlite3_quota_glob",       test_quota_glob },
  };
  int i;

  for(i=0; i<sizeof(aCmd)/sizeof(aCmd[0]); i++){
    Tcl_CreateObjCommand(interp, aCmd[i].zName, aCmd[i].xProc, 0, 0);
  }

  return TCL_OK;
}
#endif

Added src/test_quota.h.



































































































































































































































































































































































































































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/*
** 2011 December 1
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
**
** This file contains the interface definition for the quota a VFS shim.
**
** This particular shim enforces a quota system on files.  One or more
** database files are in a "quota group" that is defined by a GLOB
** pattern.  A quota is set for the combined size of all files in the
** the group.  A quota of zero means "no limit".  If the total size
** of all files in the quota group is greater than the limit, then
** write requests that attempt to enlarge a file fail with SQLITE_FULL.
**
** However, before returning SQLITE_FULL, the write requests invoke
** a callback function that is configurable for each quota group.
** This callback has the opportunity to enlarge the quota.  If the
** callback does enlarge the quota such that the total size of all
** files within the group is less than the new quota, then the write
** continues as if nothing had happened.
*/
#ifndef _QUOTA_H_
#include "sqlite3.h"
#include <stdio.h>

/* Make this callable from C++ */
#ifdef __cplusplus
extern "C" {
#endif

/*
** Initialize the quota VFS shim.  Use the VFS named zOrigVfsName
** as the VFS that does the actual work.  Use the default if
** zOrigVfsName==NULL.  
**
** The quota VFS shim is named "quota".  It will become the default
** VFS if makeDefault is non-zero.
**
** THIS ROUTINE IS NOT THREADSAFE.  Call this routine exactly once
** during start-up.
*/
int sqlite3_quota_initialize(const char *zOrigVfsName, int makeDefault);

/*
** Shutdown the quota system.
**
** All SQLite database connections must be closed before calling this
** routine.
**
** THIS ROUTINE IS NOT THREADSAFE.  Call this routine exactly once while
** shutting down in order to free all remaining quota groups.
*/
int sqlite3_quota_shutdown(void);

/*
** Create or destroy a quota group.
**
** The quota group is defined by the zPattern.  When calling this routine
** with a zPattern for a quota group that already exists, this routine
** merely updates the iLimit, xCallback, and pArg values for that quota
** group.  If zPattern is new, then a new quota group is created.
**
** The zPattern is always compared against the full pathname of the file.
** Even if APIs are called with relative pathnames, SQLite converts the
** name to a full pathname before comparing it against zPattern.  zPattern
** is a glob pattern with the following matching rules:
**
**      '*'       Matches any sequence of zero or more characters.
**
**      '?'       Matches exactly one character.
**
**     [...]      Matches one character from the enclosed list of
**                characters.  "]" can be part of the list if it is
**                the first character.  Within the list "X-Y" matches
**                characters X or Y or any character in between the
**                two.  Ex:  "[0-9]" matches any digit.
**
**     [^...]     Matches one character not in the enclosed list.
**
**     /          Matches either / or \.  This allows glob patterns
**                containing / to work on both unix and windows.
**
** Note that, unlike unix shell globbing, the directory separator "/"
** can match a wildcard.  So, for example, the pattern "/abc/xyz/" "*"
** matches any files anywhere in the directory hierarchy beneath
** /abc/xyz.
**
** The glob algorithm works on bytes.  Multi-byte UTF8 characters are
** matched as if each byte were a separate character.
**
** If the iLimit for a quota group is set to zero, then the quota group
** is disabled and will be deleted when the last database connection using
** the quota group is closed.
**
** Calling this routine on a zPattern that does not exist and with a
** zero iLimit is a no-op.
**
** A quota group must exist with a non-zero iLimit prior to opening
** database connections if those connections are to participate in the
** quota group.  Creating a quota group does not affect database connections
** that are already open.
**
** The patterns that define the various quota groups should be distinct.
** If the same filename matches more than one quota group pattern, then
** the behavior of this package is undefined.
*/
int sqlite3_quota_set(
  const char *zPattern,           /* The filename pattern */
  sqlite3_int64 iLimit,           /* New quota to set for this quota group */
  void (*xCallback)(              /* Callback invoked when going over quota */
     const char *zFilename,         /* Name of file whose size increases */
     sqlite3_int64 *piLimit,        /* IN/OUT: The current limit */
     sqlite3_int64 iSize,           /* Total size of all files in the group */
     void *pArg                     /* Client data */
  ),
  void *pArg,                     /* client data passed thru to callback */
  void (*xDestroy)(void*)         /* Optional destructor for pArg */
);

/*
** Bring the named file under quota management, assuming its name matches
** the glob pattern of some quota group.  Or if it is already under
** management, update its size.  If zFilename does not match the glob
** pattern of any quota group, this routine is a no-op.
*/
int sqlite3_quota_file(const char *zFilename);

/*
** The following object serves the same role as FILE in the standard C
** library.  It represents an open connection to a file on disk for I/O.
**
** A single quota_FILE should not be used by two or more threads at the
** same time.  Multiple threads can be using different quota_FILE objects
** simultaneously, but not the same quota_FILE object.
*/
typedef struct quota_FILE quota_FILE;

/*
** Create a new quota_FILE object used to read and/or write to the
** file zFilename.  The zMode parameter is as with standard library zMode.
*/
quota_FILE *sqlite3_quota_fopen(const char *zFilename, const char *zMode);

/*
** Perform I/O against a quota_FILE object.  When doing writes, the
** quota mechanism may result in a short write, in order to prevent
** the sum of sizes of all files from going over quota.
*/
size_t sqlite3_quota_fread(void*, size_t, size_t, quota_FILE*);
size_t sqlite3_quota_fwrite(void*, size_t, size_t, quota_FILE*);

/*
** Flush all written content held in memory buffers out to disk.
** This is the equivalent of fflush() in the standard library.
**
** If the hardSync parameter is true (non-zero) then this routine
** also forces OS buffers to disk - the equivalent of fsync().
**
** This routine return zero on success and non-zero if something goes
** wrong.
*/
int sqlite3_quota_fflush(quota_FILE*, int hardSync);

/*
** Close a quota_FILE object and free all associated resources.  The
** file remains under quota management.
*/
int sqlite3_quota_fclose(quota_FILE*);

/*
** Move the read/write pointer for a quota_FILE object.  Or tell the
** current location of the read/write pointer.
*/
int sqlite3_quota_fseek(quota_FILE*, long, int);
void sqlite3_quota_rewind(quota_FILE*);
long sqlite3_quota_ftell(quota_FILE*);

/*
** Delete a file from the disk, if that file is under quota management.
** Adjust quotas accordingly.
**
** If zFilename is the name of a directory that matches one of the
** quota glob patterns, then all files under quota management that
** are contained within that directory are deleted.
**
** A standard SQLite result code is returned (SQLITE_OK, SQLITE_NOMEM, etc.)
** When deleting a directory of files, if the deletion of any one
** file fails (for example due to an I/O error), then this routine
** returns immediately, with the error code, and does not try to 
** delete any of the other files in the specified directory.
**
** All files are removed from quota management and deleted from disk.
** However, no attempt is made to remove empty directories.
**
** This routine is a no-op for files that are not under quota management.
*/
int sqlite3_quota_remove(const char *zFilename);

#ifdef __cplusplus
}  /* end of the 'extern "C"' block */
#endif
#endif /* _QUOTA_H_ */

Added test/quota-glob.test.















































































































































































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# 2011 December 1
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
#
# Tests for the glob-style string compare operator embedded in the
# quota shim.
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl

catch { unset testnum }
catch { unset pattern }
catch { unset text }
catch { unset ans }

foreach {testnum pattern text ans} {
   1  abcdefg   abcdefg   1
   2  abcdefG   abcdefg   0
   3  abcdef    abcdefg   0
   4  abcdefgh  abcdefg   0
   5  abcdef?   abcdefg   1
   6  abcdef?   abcdef    0
   7  abcdef?   abcdefgh  0
   8  abcdefg   abcdef?   0
   9  abcdef?   abcdef?   1
  10  abc/def   abc/def   1
  11  abc//def  abc/def   0
  12  */abc/*   x/abc/y   1
  13  */abc/*   /abc/     1
  16  */abc/*   x///a/ab/abc   0
  17  */abc/*   x//a/ab/abc/   1
  16  */abc/*   x///a/ab/abc   0
  17  */abc/*   x//a/ab/abc/   1
  18  **/abc/** x//a/ab/abc/   1
  19  *?/abc/*? x//a/ab/abc/y  1
  20  ?*/abc/?* x//a/ab/abc/y  1
  21  {abc[cde]efg}   abcbefg  0
  22  {abc[cde]efg}   abccefg  1
  23  {abc[cde]efg}   abcdefg  1
  24  {abc[cde]efg}   abceefg  1
  25  {abc[cde]efg}   abcfefg  0
  26  {abc[^cde]efg}  abcbefg  1
  27  {abc[^cde]efg}  abccefg  0
  28  {abc[^cde]efg}  abcdefg  0
  29  {abc[^cde]efg}  abceefg  0
  30  {abc[^cde]efg}  abcfefg  1
  31  {abc[c-e]efg}   abcbefg  0
  32  {abc[c-e]efg}   abccefg  1
  33  {abc[c-e]efg}   abcdefg  1
  34  {abc[c-e]efg}   abceefg  1
  35  {abc[c-e]efg}   abcfefg  0
  36  {abc[^c-e]efg}  abcbefg  1
  37  {abc[^c-e]efg}  abccefg  0
  38  {abc[^c-e]efg}  abcdefg  0
  39  {abc[^c-e]efg}  abceefg  0
  40  {abc[^c-e]efg}  abcfefg  1
  41  {abc[c-e]efg}   abc-efg  0
  42  {abc[-ce]efg}   abc-efg  1
  43  {abc[ce-]efg}   abc-efg  1
  44  {abc[][*?]efg}  {abc]efg} 1
  45  {abc[][*?]efg}  {abc*efg} 1
  46  {abc[][*?]efg}  {abc?efg} 1
  47  {abc[][*?]efg}  {abc[efg} 1
  48  {abc[^][*?]efg} {abc]efg} 0
  49  {abc[^][*?]efg} {abc*efg} 0
  50  {abc[^][*?]efg} {abc?efg} 0
  51  {abc[^][*?]efg} {abc[efg} 0
  52  {abc[^][*?]efg} {abcdefg} 1
  53  {*[xyz]efg}     {abcxefg} 1
  54  {*[xyz]efg}     {abcwefg} 0
} {
  do_test quota-glob-$testnum.1 {
    sqlite3_quota_glob $::pattern $::text
  } $::ans
  do_test quota-glob-$testnum.2 {
    sqlite3_quota_glob $::pattern [string map {/ \\} $::text]
  } $::ans
}
finish_test

Changes to test/quota.test.

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#   quota-2.4.*: Try to shutdown the quota system before closing the db
#                file. Check that this fails and the quota system still works
#                afterwards. Then close the database and successfully shut
#                down the quota system.
#   
sqlite3_quota_initialize "" 1


proc quota_check {filename limitvar size} {
  upvar $limitvar limit

  lappend ::quota [set limit] $size
  if {[info exists ::quota_request_ok]} { set limit $size }
}








>







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#   quota-2.4.*: Try to shutdown the quota system before closing the db
#                file. Check that this fails and the quota system still works
#                afterwards. Then close the database and successfully shut
#                down the quota system.
#   
sqlite3_quota_initialize "" 1

unset -nocomplain quota_request_ok
proc quota_check {filename limitvar size} {
  upvar $limitvar limit

  lappend ::quota [set limit] $size
  if {[info exists ::quota_request_ok]} { set limit $size }
}

Added test/quota2.test.

























































































































































































































































































































































































































































































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# 2011 December 1
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
source $testdir/malloc_common.tcl

db close
sqlite3_quota_initialize "" 1

foreach dir {quota2a/x1 quota2a/x2 quota2a quota2b quota2c} {
  file delete -force $dir
}
foreach dir {quota2a quota2a/x1 quota2a/x2 quota2b quota2c} {
  file mkdir $dir
}

# The standard_path procedure converts a pathname into a standard format
# that is the same across platforms.
#
unset -nocomplain ::quota_pwd ::quota_mapping
set ::quota_pwd [string map {\\ /} [pwd]]
set ::quota_mapping [list $::quota_pwd PWD]
proc standard_path {x} {
  set x [string map {\\ /} $x]
  return [string map $::quota_mapping $x]
}

# The quota_check procedure is a callback from the quota handler.
# It has three arguments which are (1) the full pathname of the file
# that has gone over quota, (2) the quota limit, (3) the requested
# new quota size to cover the last write.  These three values are
# appended to the global variable $::quota.  The filename is processed
# to convert every \ character into / and to change the name of the
# working directory to PWD.  
#
# The quota is increased to the request if the ::quota_request_ok 
# global variable is true.
#
set ::quota {}
set ::quota_request_ok 0

proc quota_check {filename limitvar size} {
  upvar $limitvar limit
  lappend ::quota [standard_path $filename] [set limit] $size
  if {$::quota_request_ok} {set limit $size}
}

sqlite3_quota_set */quota2a/* 4000 quota_check
sqlite3_quota_set */quota2b/* 5000 quota_check

unset -nocomplain bigtext
for {set i 1} {$i<=1000} {incr i} {
  if {$i%10==0} {
    append bigtext [format "%06d\n" $i]
  } else {
    append bigtext [format "%06d " $i]
  }
}

catch { unset h1 }
catch { unset x }
do_test quota2-1.1 {
  set ::h1 [sqlite3_quota_fopen quota2a/xyz.txt w+b]
  sqlite3_quota_fwrite $::h1 1 7000 $bigtext
} {4000}
do_test quota2-1.2 {
  set ::quota
} {PWD/quota2a/xyz.txt 4000 7000}
do_test quota2-1.3 {
  sqlite3_quota_rewind $::h1
  set ::x [sqlite3_quota_fread $::h1 1001 7]
  string length $::x
} {3003}
do_test quota2-1.4 {
  string match $::x [string range $::bigtext 0 3002]
} {1}
do_test quota2-1.5 {
  sqlite3_quota_fseek $::h1 0 SEEK_END
  sqlite3_quota_ftell $::h1
} {4000}
do_test quota2-1.6 {
  sqlite3_quota_fseek $::h1 -100 SEEK_END
  sqlite3_quota_ftell $::h1
} {3900}
do_test quota2-1.7 {
  sqlite3_quota_fseek $::h1 -100 SEEK_CUR
  sqlite3_quota_ftell $::h1
} {3800}
do_test quota2-1.8 {
  sqlite3_quota_fseek $::h1 50 SEEK_CUR
  sqlite3_quota_ftell $::h1
} {3850}
do_test quota2-1.9 {
  sqlite3_quota_fseek $::h1 50 SEEK_SET
  sqlite3_quota_ftell $::h1
} {50}
do_test quota2-1.10 {
  sqlite3_quota_rewind $::h1
  sqlite3_quota_ftell $::h1
} {0}
do_test quota2-1.11 {
  standard_path [sqlite3_quota_dump]
} {{*/quota2b/* 5000 0} {*/quota2a/* 4000 4000 {PWD/quota2a/xyz.txt 4000 1 0}}}
do_test quota2-1.12 {
  sqlite3_quota_fclose $::h1
  standard_path [sqlite3_quota_dump]
} {{*/quota2b/* 5000 0} {*/quota2a/* 4000 4000 {PWD/quota2a/xyz.txt 4000 0 0}}}
do_test quota2-1.13 {
  sqlite3_quota_remove quota2a/xyz.txt
  standard_path [sqlite3_quota_dump]
} {{*/quota2b/* 5000 0} {*/quota2a/* 4000 0}}


set quota {}
do_test quota2-2.1 {
  set ::h1 [sqlite3_quota_fopen quota2c/xyz.txt w+b]
  sqlite3_quota_fwrite $::h1 1 7000 $bigtext
} {7000}
do_test quota2-2.2 {
  set ::quota
} {}
do_test quota2-2.3 {
  sqlite3_quota_rewind $::h1
  set ::x [sqlite3_quota_fread $::h1 1001 7]
  string length $::x
} {6006}
do_test quota2-2.4 {
  string match $::x [string range $::bigtext 0 6005]
} {1}
do_test quota2-2.5 {
  sqlite3_quota_fseek $::h1 0 SEEK_END
  sqlite3_quota_ftell $::h1
} {7000}
do_test quota2-2.6 {
  sqlite3_quota_fseek $::h1 -100 SEEK_END
  sqlite3_quota_ftell $::h1
} {6900}
do_test quota2-2.7 {
  sqlite3_quota_fseek $::h1 -100 SEEK_CUR
  sqlite3_quota_ftell $::h1
} {6800}
do_test quota2-2.8 {
  sqlite3_quota_fseek $::h1 50 SEEK_CUR
  sqlite3_quota_ftell $::h1
} {6850}
do_test quota2-2.9 {
  sqlite3_quota_fseek $::h1 50 SEEK_SET
  sqlite3_quota_ftell $::h1
} {50}
do_test quota2-2.10 {
  sqlite3_quota_rewind $::h1
  sqlite3_quota_ftell $::h1
} {0}
do_test quota2-2.11 {
  standard_path [sqlite3_quota_dump]
} {{*/quota2b/* 5000 0} {*/quota2a/* 4000 0}}
do_test quota2-2.12 {
  sqlite3_quota_fclose $::h1
  standard_path [sqlite3_quota_dump]
} {{*/quota2b/* 5000 0} {*/quota2a/* 4000 0}}

do_test quota2-3.1 {
  sqlite3_quota_set */quota2b/* 0 quota_check
  set ::h1 [sqlite3_quota_fopen quota2a/x1/a.txt a]
  sqlite3_quota_fwrite $::h1 10 10 $bigtext
} {10}
do_test quota2-3.2 {
  standard_path [sqlite3_quota_dump]
} {{*/quota2a/* 4000 100 {PWD/quota2a/x1/a.txt 100 1 0}}}
do_test quota2-3.3a {
  sqlite3_quota_fflush $::h1 0
  standard_path [sqlite3_quota_dump]
} {{*/quota2a/* 4000 100 {PWD/quota2a/x1/a.txt 100 1 0}}}
do_test quota2-3.3b {
  sqlite3_quota_fflush $::h1 1
  standard_path [sqlite3_quota_dump]
} {{*/quota2a/* 4000 100 {PWD/quota2a/x1/a.txt 100 1 0}}}
do_test quota2-3.3c {
  sqlite3_quota_fflush $::h1
  standard_path [sqlite3_quota_dump]
} {{*/quota2a/* 4000 100 {PWD/quota2a/x1/a.txt 100 1 0}}}
do_test quota2-3.4 {
  sqlite3_quota_fclose $::h1
  standard_path [sqlite3_quota_dump]
} {{*/quota2a/* 4000 100 {PWD/quota2a/x1/a.txt 100 0 0}}}
do_test quota2-3.5 {
  set ::h2 [sqlite3_quota_fopen quota2a/x2/b.txt a]
  sqlite3_quota_fwrite $::h2 10 20 $bigtext
  standard_path [sqlite3_quota_dump]
} {{*/quota2a/* 4000 300 {PWD/quota2a/x2/b.txt 200 1 0} {PWD/quota2a/x1/a.txt 100 0 0}}}
do_test quota2-3.6 {
  set ::h3 [sqlite3_quota_fopen quota2a/x1/c.txt a]
  sqlite3_quota_fwrite $::h3 10 50 $bigtext
  standard_path [sqlite3_quota_dump]
} {{*/quota2a/* 4000 800 {PWD/quota2a/x1/c.txt 500 1 0} {PWD/quota2a/x2/b.txt 200 1 0} {PWD/quota2a/x1/a.txt 100 0 0}}}
do_test quota2-3.7 {
  file exists quota2a/x1/a.txt
} {1}
do_test quota2-3.8 {
  file exists quota2a/x2/b.txt
} {1}
do_test quota2-3.9 {
  file exists quota2a/x1/c.txt
} {1}
do_test quota2-3.10 {
  sqlite3_quota_remove quota2a/x1
  standard_path [sqlite3_quota_dump]
} {{*/quota2a/* 4000 700 {PWD/quota2a/x1/c.txt 500 1 1} {PWD/quota2a/x2/b.txt 200 1 0}}}
do_test quota2-3.11 {
  sqlite3_quota_fclose $::h2
  sqlite3_quota_fclose $::h3
  standard_path [sqlite3_quota_dump]
} {{*/quota2a/* 4000 200 {PWD/quota2a/x2/b.txt 200 0 0}}}
do_test quota2-3.12 {
  file exists quota2a/x1/a.txt
} {0}
do_test quota2-3.13 {
  file exists quota2a/x2/b.txt
} {1}
do_test quota2-3.14 {
  file exists quota2a/x1/c.txt
} {0}

catch { sqlite3_quota_shutdown }
catch { unset quota_request_ok }
finish_test