SQLite

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code to implement the "sqlite" command line
** utility for accessing SQLite databases.
**
** $Id: shell.c,v 1.151 2006/10/26 14:25:58 drh Exp $
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <assert.h>
#include "sqlite3.h"
#include <ctype.h>

# include <io.h>
#else
/* Make sure isatty() has a prototype.
*/
extern int isatty();
#endif

/*
** Threat stdin as an interactive input if the following variable
** is true.  Otherwise, assume stdin is connected to a file or pipe.
*/
static int stdin_is_interactive = 1;

/*
** The following is the open SQLite database.  We make a pointer
** to this database a static variable so that it can be accessed
** by the SIGINT handler to interrupt database processing.
*/
static sqlite3 *db = 0;

    }
  }
  zLine = realloc( zLine, n+1 );
  return zLine;
}

/*
** Retrieve a single line of input text.



**
** zPrior is a string of prior text retrieved.  If not the empty
** string, then issue a continuation prompt.
*/
static char *one_input_line(const char *zPrior, FILE *in){
  char *zPrompt;
  char *zResult;

  ".show                  Show the current values for various settings\n"
  ".tables ?PATTERN?      List names of tables matching a LIKE pattern\n"
  ".timeout MS            Try opening locked tables for MS milliseconds\n"
  ".width NUM NUM ...     Set column widths for \"column\" mode\n"
;

/* Forward reference */
static int process_input(struct callback_data *p, FILE *in);

/*
** Make sure the database is open.  If it is not, then open it.  If
** the database fails to open, print an error message and exit.
*/
static void open_db(struct callback_data *p){
  if( p->db==0 ){

        }
      }
    }
    z[j] = c;
  }
  z[j] = 0;
}

/*
** Interpret zArg as a boolean value.  Return either 0 or 1.
*/
static int booleanValue(char *zArg){
  int val = atoi(zArg);
  int j;
  for(j=0; zArg[j]; j++){
    zArg[j] = tolower(zArg[j]);
  }
  if( strcmp(zArg,"on")==0 ){
    val = 1;
  }else if( strcmp(zArg,"yes")==0 ){
    val = 1;
  }
  return val;
}

/*
** If an input line begins with "." then invoke this routine to
** process that line.
**
** Return 1 to exit and 0 to continue.
*/

      sqlite3_free(zErrMsg);
    }else{
      fprintf(p->out, "COMMIT;\n");
    }
  }else

  if( c=='e' && strncmp(azArg[0], "echo", n)==0 && nArg>1 ){











    p->echoOn = booleanValue(azArg[1]);
  }else

  if( c=='e' && strncmp(azArg[0], "exit", n)==0 ){
    rc = 1;
  }else

  if( c=='e' && strncmp(azArg[0], "explain", n)==0 ){



    int val = nArg>=2 ? booleanValue(azArg[1]) : 1;








    if(val == 1) {
      if(!p->explainPrev.valid) {
        p->explainPrev.valid = 1;
        p->explainPrev.mode = p->mode;
        p->explainPrev.showHeader = p->showHeader;
        memcpy(p->explainPrev.colWidth,p->colWidth,sizeof(p->colWidth));
      }

      p->explainPrev.valid = 0;
      p->mode = p->explainPrev.mode;
      p->showHeader = p->explainPrev.showHeader;
      memcpy(p->colWidth,p->explainPrev.colWidth,sizeof(p->colWidth));
    }
  }else

  if( c=='h' && (strncmp(azArg[0], "header", n)==0 ||

                 strncmp(azArg[0], "headers", n)==0 )&& nArg>1 ){











    p->showHeader = booleanValue(azArg[1]);
  }else

  if( c=='h' && strncmp(azArg[0], "help", n)==0 ){
    fprintf(stderr,zHelp);
  }else

  if( c=='i' && strncmp(azArg[0], "import", n)==0 && nArg>=3 ){

/*
** Read input from *in and process it.  If *in==0 then input
** is interactive - the user is typing it it.  Otherwise, input
** is coming from a file or device.  A prompt is issued and history
** is saved only if input is interactive.  An interrupt signal will
** cause this routine to exit immediately, unless input is interactive.
**
** Return the number of errors.
*/
static int process_input(struct callback_data *p, FILE *in){
  char *zLine;
  char *zSql = 0;
  int nSql = 0;
  char *zErrMsg;
  int rc = 0;
  int lineno = 0;
  int startline = 0;
  while( fflush(p->out), (zLine = one_input_line(zSql, in))!=0 ){
    if( seenInterrupt ){
      if( in!=0 ) break;
      seenInterrupt = 0;
    }
    if( rc && (in!=0 || !stdin_is_interactive) ){
      break;
    }
    lineno++;
    if( p->echoOn ) printf("%s\n", zLine);
    if( (zSql==0 || zSql[0]==0) && _all_whitespace(zLine) ) continue;
    if( zLine && zLine[0]=='.' && nSql==0 ){
      int rc = do_meta_command(zLine, p);
      free(zLine);
      if( rc ) break;
      continue;

        nSql = strlen(zLine);
        zSql = malloc( nSql+1 );
        if( zSql==0 ){
          fprintf(stderr, "out of memory\n");
          exit(1);
        }
        strcpy(zSql, zLine);
        startline = lineno;
      }
    }else{
      int len = strlen(zLine);
      zSql = realloc( zSql, nSql + len + 2 );
      if( zSql==0 ){
        fprintf(stderr,"%s: out of memory!\n", Argv0);
        exit(1);
      }
      strcpy(&zSql[nSql++], "\n");
      strcpy(&zSql[nSql], zLine);
      nSql += len;
    }
    free(zLine);
    if( zSql && _ends_with_semicolon(zSql, nSql) && sqlite3_complete(zSql) ){
      p->cnt = 0;
      open_db(p);
      rc = sqlite3_exec(p->db, zSql, callback, p, &zErrMsg);
      if( rc || zErrMsg ){
        char zPrefix[100];
        if( in!=0 || !stdin_is_interactive ){
          sprintf(zPrefix, "SQL error near line %d:", startline);
        }else{
          sprintf(zPrefix, "SQL error:");
        }
        if( zErrMsg!=0 ){
          printf("%s %s\n", zPrefix, zErrMsg);
          sqlite3_free(zErrMsg);
          zErrMsg = 0;
        }else{
          printf("%s %s\n", zPrefix, sqlite3_errmsg(p->db));
        }
      }
      free(zSql);
      zSql = 0;
      nSql = 0;
    }
  }
  if( zSql ){
    if( !_all_whitespace(zSql) ) printf("Incomplete SQL: %s\n", zSql);
    free(zSql);
  }
  return rc;
}

/*
** Return a pathname which is the user's home directory.  A
** 0 return indicates an error of some kind.  Space to hold the
** resulting string is obtained from malloc().  The calling
** function should free the result.

    }
    sprintf(zBuf,"%s/.sqliterc",home_dir);
    free(home_dir);
    sqliterc = (const char*)zBuf;
  }
  in = fopen(sqliterc,"rb");
  if( in ){
    if( stdin_is_interactive ){
      printf("Loading resources from %s\n",sqliterc);
    }
    process_input(p,in);
    fclose(in);
  }
  free(zBuf);
  return;

int main(int argc, char **argv){
  char *zErrMsg = 0;
  struct callback_data data;
  const char *zInitFile = 0;
  char *zFirstCmd = 0;
  int i;
  int rc = 0;

#ifdef __MACOS__
  argc = ccommand(&argv);
#endif

  Argv0 = argv[0];
  main_init(&data);
  stdin_is_interactive = isatty(0);

  /* Make sure we have a valid signal handler early, before anything
  ** else is done.
  */
#ifdef SIGINT
  signal(SIGINT, interrupt_handler);
#endif

  /* Do an initial pass through the command-line argument to locate
  ** the name of the database file, the name of the initialization file,
  ** and the first command to execute.
  */
  for(i=1; i<argc-1; i++){
    char *z;
    if( argv[i][0]!='-' ) break;
    z = argv[i];
    if( z[0]=='-' && z[1]=='-' ) z++;
    if( strcmp(argv[i],"-separator")==0 || strcmp(argv[i],"-nullvalue")==0 ){
      i++;
    }else if( strcmp(argv[i],"-init")==0 ){
      i++;
      zInitFile = argv[i];
    }
  }

  /* Make a second pass through the command-line argument and set
  ** options.  This second pass is delayed until after the initialization
  ** file is processed so that the command-line arguments will override
  ** settings in the initialization file.
  */
  for(i=1; i<argc && argv[i][0]=='-'; i++){
    char *z = argv[i];
    if( z[1]=='-' ){ z++; }
    if( strcmp(z,"-init")==0 ){
      i++;
    }else if( strcmp(z,"-html")==0 ){
      data.mode = MODE_Html;
    }else if( strcmp(z,"-list")==0 ){
      data.mode = MODE_List;
    }else if( strcmp(z,"-line")==0 ){

    }else if( strcmp(z,"-noheader")==0 ){
      data.showHeader = 0;
    }else if( strcmp(z,"-echo")==0 ){
      data.echoOn = 1;
    }else if( strcmp(z,"-version")==0 ){
      printf("%s\n", sqlite3_libversion());
      return 0;
    }else if( strcmp(z,"-interactive")==0 ){
      stdin_is_interactive = 1;
    }else if( strcmp(z,"-batch")==0 ){
      stdin_is_interactive = 0;
    }else if( strcmp(z,"-help")==0 || strcmp(z, "--help")==0 ){
      usage(1);
    }else{
      fprintf(stderr,"%s: unknown option: %s\n", Argv0, z);
      fprintf(stderr,"Use -help for a list of options.\n");
      return 1;
    }

        fprintf(stderr,"SQL error: %s\n", zErrMsg);
        exit(1);
      }
    }
  }else{
    /* Run commands received from standard input
    */
    if( stdin_is_interactive ){
      char *zHome;
      char *zHistory = 0;
      printf(
        "SQLite version %s\n"
        "Enter \".help\" for instructions\n",
        sqlite3_libversion()
      );
      zHome = find_home_dir();
      if( zHome && (zHistory = malloc(strlen(zHome)+20))!=0 ){
        sprintf(zHistory,"%s/.sqlite_history", zHome);
      }
#if defined(HAVE_READLINE) && HAVE_READLINE==1
      if( zHistory ) read_history(zHistory);
#endif
      rc = process_input(&data, 0);
      if( zHistory ){
        stifle_history(100);
        write_history(zHistory);
        free(zHistory);
      }
      free(zHome);
    }else{
      rc = process_input(&data, stdin);
    }
  }
  set_table_name(&data, 0);
  if( db ){
    if( sqlite3_close(db)!=SQLITE_OK ){
      fprintf(stderr,"error closing database: %s\n", sqlite3_errmsg(db));
    }
  }
  return rc;
}