/* This file is part of GDBM test suite.
   Copyright (C) 2011, 2016-2018 Free Software Foundation, Inc.

   GDBM is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   GDBM is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with GDBM. If not, see <http://www.gnu.org/licenses/>.
*/
#include "autoconf.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "gdbm.h"
#include "progname.h"

void
print_key (FILE *fp, datum key, int delim)
{
  size_t i;
  
  for (i = 0; i < key.dsize && key.dptr[i]; i++)
    {
      if (key.dptr[i] == delim || key.dptr[i] == '\\')
	fputc ('\\', fp);
      fputc (key.dptr[i], fp);
    }
}

int
main (int argc, char **argv)
{
  const char *progname = canonical_progname (argv[0]);
  const char *dbname;
  datum key;
  datum data;
  int flags = 0;
  GDBM_FILE dbf;
  int data_z = 0;
  int delim = 0;
  int rc = 0;
  
  while (--argc)
    {
      char *arg = *++argv;

      if (strcmp (arg, "-h") == 0)
	{
	  printf ("usage: %s [-nolock] [-nommap] [-null] [-delim=CHR] DBFILE KEY [KEY...]\n",
		  progname);
	  exit (0);
	}
      else if (strcmp (arg, "-nolock") == 0)
	flags |= GDBM_NOLOCK;
      else if (strcmp (arg, "-nommap") == 0)
	flags |= GDBM_NOMMAP;
      else if (strcmp (arg, "-null") == 0)
	data_z = 1;
      else if (strncmp (arg, "-delim=", 7) == 0)
	delim = arg[7];
      else if (strcmp (arg, "--") == 0)
	{
	  --argc;
	  ++argv;
	  break;
	}
      else if (arg[0] == '-')
	{
	  fprintf (stderr, "%s: unknown option %s\n", progname, arg);
	  exit (1);
	}
      else
	break;
    }

  if (argc < 2)
    {
      fprintf (stderr, "%s: wrong arguments\n", progname);
      exit (1);
    }
  dbname = *argv;
  
  dbf = gdbm_open (dbname, 0, GDBM_READER|flags, 00664, NULL);
  if (!dbf)
    {
      fprintf (stderr, "gdbm_open failed: %s\n", gdbm_strerror (gdbm_errno));
      exit (1);
    }

  while (--argc)
    {
      char *arg = *++argv;

      key.dptr = arg;
      key.dsize = strlen (arg) + !!data_z;

      data = gdbm_fetch (dbf, key);
      if (data.dptr == NULL)
	{
	  rc = 2;
	  if (gdbm_errno == GDBM_ITEM_NOT_FOUND)
	    {
	      fprintf (stderr, "%s: ", progname);
	      print_key (stderr, key, delim);
	      fprintf (stderr, ": not found\n");
	    }
	  else
	    {
	      fprintf (stderr, "%s: error: %s\n", progname,
		       gdbm_strerror (gdbm_errno));
	    }
	  continue;
	}
      if (delim)
	{
	  print_key (stdout, key, delim);
	  fputc (delim, stdout);
	}

      fwrite (data.dptr, data.dsize - !!data_z, 1, stdout);
      free (data.dptr);
      
      fputc ('\n', stdout);
    }

  if (gdbm_close (dbf))
    {
      fprintf (stderr, "gdbm_close: %s; %s\n", gdbm_strerror (gdbm_errno),
	       strerror (errno));
      rc = 3;
    }
  exit (rc);
}