SQLite

** sqlite and the code that does the actually reading and writing
** of information to the disk.
**
** This file uses GDBM as the database backend.  It should be
** relatively simple to convert to a different database such
** as NDBM, SDBM, or BerkeleyDB.
**
** $Id: dbbe.c,v 1.2 2000/05/30 18:45:24 drh Exp $
*/
#include "sqliteInt.h"
#include <gdbm.h>
#include <sys/stat.h>
#include <unistd.h>
#include <ctype.h>
#include <time.h>

    pFile->nRef = 1;
    pFile->pPrev = 0;
    if( pBe->pOpen ){
      pBe->pOpen->pPrev = pFile;
    }
    pFile->pNext = pBe->pOpen;
    pBe->pOpen = pFile;
    pFile->dbf = gdbm_open(pFile->zName, 0, GDBM_WRCREAT|GDBM_FAST, 0640, 0);
  }else{
    sqliteFree(zFile);
    pFile->nRef++;
  }
  pTable->pBe = pBe;
  pTable->pFile = pFile;
  pTable->readPending = 0;

void sqliteDbbeCloseTable(DbbeTable *pTable){
  BeFile *pFile;
  Dbbe *pBe;
  if( pTable==0 ) return;
  pFile = pTable->pFile;
  pBe = pTable->pBe;
  pFile->nRef--;
  if( pFile->dbf!=NULL ){
    gdbm_sync(pFile->dbf);
  }
  if( pFile->nRef<=0 ){
    if( pFile->dbf!=NULL ){
      gdbm_close(pFile->dbf);
    }
    if( pFile->pPrev ){
      pFile->pPrev->pNext = pFile->pNext;
    }else{

**   drh@hwaci.com
**   http://www.hwaci.com/drh/
**
*************************************************************************
** This file contains code to implement the "sqlite" command line
** utility for accessing SQLite databases.
**
** $Id: shell.c,v 1.3 2000/05/30 18:45:24 drh Exp $
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "sqlite.h"
#include <unistd.h>
#include <ctype.h>

#if !defined(NO_READLINE)
# include <readline/readline.h>
# include <readline/history.h>
#else
# define readline getline
# define add_history(X) 
#endif

/*
** This routine reads a line of text from standard input, stores
** the text in memory obtained from malloc() and returns a pointer
** to the text.  NULL is returned at end of file, or if malloc()
** fails.
**
** The interface is like "readline" but no command-line editing
** is done.
*/
static char *getline(char *zPrompt){
  char *zLine;
  int nLine;
  char *z;
  int n;
  int eol;

  if( zPrompt && *zPrompt ){
    printf("%s",zPrompt);
    fflush(stdout);
  }
  nLine = 100;
  zLine = malloc( nLine );
  if( zLine==0 ) return 0;
  n = 0;
  eol = 0;
  while( !eol ){
    if( n+100>nLine ){
      nLine = nLine*2 + 100;
      zLine = realloc(zLine, nLine);
      if( zLine==0 ) return 0;
    }
    if( fgets(&zLine[n], nLine - n, stdin)==0 ){
      if( n==0 ){
        free(zLine);
        return 0;
      }
      zLine[n] = 0;
      eol = 1;
      break;
    }
    while( zLine[n] ){ n++; }
    if( n>0 && zLine[n-1]=='\n' ){
      n--;
      zLine[n] = 0;
      eol = 1;
    }
  }
  zLine = realloc( zLine, n+1 );
  return zLine;
}

/*
** Retrieve a single line of input text.  "isatty" is true if text
** is coming from a terminal.  In that case, we issue a prompt and
** attempt to use "readline" for command-line editing.  If "isatty"
** is false, use "getline" instead of "readline" and issue to prompt.
**
** 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, int isatty){
  char *zPrompt;
  char *zResult;
  if( !isatty ){
    return getline(0);
  }
  if( zPrior && zPrior[0] ){
    zPrompt = "   ...> ";
  }else{
    zPrompt = "sqlite> ";
  }
  zResult = readline(zPrompt);
  add_history(zResult);
  return zResult;
}

/*
** An pointer to an instance of this structure is passed from
** the main program to the callback.  This is used to communicate
** state and mode information.
*/
struct callback_data {

    strcpy(data.separator,"|");
    data.showHeader = 0;
    if( istty ){
      printf(
        "Enter \".help\" for instructions\n"
      );
    }
    while( (zLine = one_input_line(zSql, istty))!=0 ){

      if( zLine && zLine[0]=='.' ){
        do_meta_command(zLine, db, &data);
        free(zLine);
        continue;
      }
      if( zSql==0 ){
        nSql = strlen(zLine);