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 1.52 2002/04/18 02:53:05 persicom Exp $
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "sqlite.h"
#include <ctype.h>
#include <pwd.h>
#include <sys/types.h>

#if !defined(_WIN32) && !defined(WIN32)
# include <signal.h>



#endif

#if defined(HAVE_READLINE) && HAVE_READLINE==1
# include <readline/readline.h>
# include <readline/history.h>
#else
# define readline(p) getline(p,stdin)

** Text of a help message
*/
static char zHelp[] =
  ".dump ?TABLE? ...      Dump the database in an text format\n"
  ".echo ON|OFF           Turn command echo on or off\n"
  ".exit                  Exit this program\n"
  ".explain ON|OFF        Turn output mode suitable for EXPLAIN on or off.\n"
  "                       \"off\" will revert to the output mode that was\n"
  "                       previously in effect\n"
  ".header(s) ON|OFF      Turn display of headers on or off\n"
  ".help                  Show this message\n"
  ".indices TABLE         Show names of all indices on TABLE\n"
  ".mode MODE             Set mode to one of \"line(s)\", \"column(s)\", \n"
  "                       \"insert\", \"list\", or \"html\"\n"
  ".mode insert TABLE     Generate SQL insert statements for TABLE\n"
  ".nullvalue STRING      Print STRING instead of nothing for NULL data\n"
  ".output FILENAME       Send output to FILENAME\n"
  ".output stdout         Send output to the screen\n"
  ".prompt MAIN CONTINUE  Replace the standard prompts\n"
  "                       \"sqlite > \" and \"   ...> \"\n"
  "                       with the strings MAIN and CONTINUE\n"
  "                       CONTINUE is optional.\n"
  ".quit                  Exit this program\n"
  ".read FILENAME         Execute SQL in FILENAME\n"
  ".reindex ?TABLE?       Rebuild indices\n"
/*  ".rename OLD NEW        Change the name of a table or index\n" */
  ".schema ?TABLE?        Show the CREATE statements\n"
  ".separator STRING      Change separator string for \"list\" mode\n"
  ".show                  Show the current values for the following:\n"
  "                       .echo\n"
  "                       .explain\n"
  "                       .mode\n"
  "                       .nullvalue\n"
  "                       .output\n"
  "                       .separator\n"
  "                       .width\n"
  ".tables ?PATTERN?      List names of tables matching a 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 void process_input(struct callback_data *p, FILE *in);

  }else

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

  if( c=='e' && strncmp(azArg[0], "explain", n)==0 && nArg>1){
    int j;
    char *z = azArg[1];
    int val = atoi(azArg[1]);
    for(j=0; z[j]; j++){
      if( isupper(z[j]) ) z[j] = tolower(z[j]);
    }
    if( strcmp(z,"on")==0 ){
      val = 1;
    }else if( strcmp(z,"yes")==0 ){
      val = 1;

        p->out = stdout;
      } else {
         strcpy(p->outfile,azArg[1]);
      }
    }
  }else

  if( c=='p' && strncmp(azArg[0], "prompt", n)==0 && nArg==2 || nArg==3){
    if( nArg >= 2) {
      strncpy(mainPrompt,azArg[1],(int)ArraySize(mainPrompt)-1);
    }
    if( nArg >= 3) {
      strncpy(continuePrompt,azArg[2],(int)ArraySize(continuePrompt)-1);
    }
  }else

    sprintf(p->separator, "%.*s", (int)ArraySize(p->separator)-1, azArg[1]);
  }else

  if( c=='s' && strncmp(azArg[0], "show", n)==0){
    int i;
    fprintf(p->out,"%9.9s: %s\n","echo", p->echoOn ? "on" : "off");
    fprintf(p->out,"%9.9s: %s\n","explain", p->explainPrev.valid ? "on" : "off");

    fprintf(p->out,"%9.9s: %s\n","mode", modeDescr[p->mode]);
    fprintf(p->out,"%9.9s: %s\n","nullvalue", p->nullvalue);
    fprintf(p->out,"%9.9s: %s\n","output", strlen(p->outfile) ? p->outfile : "stdout");
    fprintf(p->out,"%9.9s: %s\n","separator", p->separator);
    fprintf(p->out,"%9.9s: ","width");
    for (i=0;i<(int)ArraySize(p->colWidth) && p->colWidth[i] != 0;i++) {
        fprintf(p->out,"%d ",p->colWidth[i]);

}

static void process_sqliterc(struct callback_data *p,
                             char *sqliterc_override){

  char *home_dir = NULL;
  char *sqliterc = sqliterc_override;
  struct passwd *pwent;
  uid_t uid = getuid();
  FILE *in = NULL;

  if (sqliterc == NULL) {
    /* Figure out the user's home directory */



    while( (pwent=getpwent()) != NULL) {
      if(pwent->pw_uid == uid) {
        home_dir = pwent->pw_dir;
        break;
      }
    }


    if (!home_dir) {
      home_dir = getenv("HOME");
      if (!home_dir) {
        home_dir = getenv("HOMEPATH"); /* Windows? */
      }
      if (!home_dir) {

  if(!in) {
    /* File either had an error or was not found. Since I cannot
     * tell, I cannot bark. */
    return;
  } else {
    printf("Loading resources from %s\n",sqliterc);
    process_input(p,in);
    close (in);
  }
  return;
}

void main_init(struct callback_data *data) {
  memset(data, 0, sizeof(*data));
  data->mode = MODE_List;