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 1.168 2007/11/02 12:53:04 drh Exp $
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <assert.h>
#include "sqlite3.h"
#include <ctype.h>

#if defined(_WIN32) || defined(WIN32)
# include <io.h>
#else
/* Make sure isatty() has a prototype.
*/
extern int isatty();
#endif

#if !defined(_WIN32) && !defined(WIN32) && !defined(__OS2__)
#include <sys/time.h>
#include <sys/resource.h>

/* Saved resource information for the beginning of an operation */
static struct rusage sBegin;

/* True if the timer is enabled */
static int enableTimer = 0;

/*
** Begin timing an operation
*/
static void beginTimer(void){
  if( enableTimer ){
    getrusage(RUSAGE_SELF, &sBegin);
  }
}

/* Return the difference of two time_structs in microseconds */
static int timeDiff(struct timeval *pStart, struct timeval *pEnd){
  return (pEnd->tv_usec - pStart->tv_usec) + 
         1000000*(pEnd->tv_sec - pStart->tv_sec);
}

/*
** Print the timing results.
*/
static void endTimer(void){
  if( enableTimer ){
    struct rusage sEnd;
    getrusage(RUSAGE_SELF, &sEnd);
    printf("CPU Time: user %f sys %f\n",
       0.000001*timeDiff(&sBegin.ru_utime, &sEnd.ru_utime),
       0.000001*timeDiff(&sBegin.ru_stime, &sEnd.ru_stime));
  }
}
#define BEGIN_TIMER beginTimer()
#define END_TIMER endTimer()
#define HAS_TIMER 1
#else
#define BEGIN_TIMER 
#define END_TIMER
#define HAS_TIMER 0
#endif


/*
** If the following flag is set, then command execution stops
** at an error if we are not interactive.
*/
static int bail_on_error = 0;

  ".quit                  Exit this program\n"
  ".read FILENAME         Execute SQL in FILENAME\n"
  ".schema ?TABLE?        Show the CREATE statements\n"
  ".separator STRING      Change separator used by output mode and .import\n"
  ".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"
#if HAS_TIMER
  ".timer ON|OFF          Turn the CPU timer measurement on or off\n"
#endif
  ".width NUM NUM ...     Set column widths for \"column\" mode\n"
;

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

/*

      }
    }else{
      rc = 1;
    }
    sqlite3_free_table(azResult);
  }else

  if( c=='t' && n>4 && strncmp(azArg[0], "timeout", n)==0 && nArg>=2 ){
    open_db(p);
    sqlite3_busy_timeout(p->db, atoi(azArg[1]));
  }else
  
#if HAS_TIMER  
  if( c=='t' && n>=5 && strncmp(azArg[0], "timer", n)==0 && nArg>1 ){
    enableTimer = booleanValue(azArg[1]);
  }else
#endif

  if( c=='w' && strncmp(azArg[0], "width", n)==0 ){
    int j;
    assert( nArg<=ArraySize(azArg) );
    for(j=1; j<nArg && j<ArraySize(p->colWidth); j++){
      p->colWidth[j-1] = atoi(azArg[j]);
    }
  }else


  {
    fprintf(stderr, "unknown command or invalid arguments: "
      " \"%s\". Enter \".help\" for help\n", azArg[0]);
  }

  return rc;

      memcpy(&zSql[nSql], zLine, len+1);
      nSql += len;
    }
    if( zSql && _contains_semicolon(&zSql[nSqlPrior], nSql-nSqlPrior)
                && sqlite3_complete(zSql) ){
      p->cnt = 0;
      open_db(p);
      BEGIN_TIMER;
      rc = sqlite3_exec(p->db, zSql, callback, p, &zErrMsg);
      END_TIMER;
      if( rc || zErrMsg ){
        char zPrefix[100];
        if( in!=0 || !stdin_is_interactive ){
          sqlite3_snprintf(sizeof(zPrefix), zPrefix, 
                           "SQL error near line %d:", startline);
        }else{
          sqlite3_snprintf(sizeof(zPrefix), zPrefix, "SQL error:");