/* $Id: escape.c,v 1.1 2005/07/18 16:43:05 dm Exp $ */

/*
 *
 * Copyright (C) 2005 David Mazieres (dm@uun.org)
 *
 * This program 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.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 *
 */

#include "avutil.h"
#include "getopt_long.h"

char *progname;

const char shellspec[128] = {
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 1,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0,
  1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1,
};

void
escape (const char *_s)
{
  const unsigned char *s = (const unsigned char *) _s;
  while (*s) {
    if (*s < sizeof (shellspec) && shellspec[*s])
      printf ("\\");
    printf ("%c", *s++);
  }
  printf ("\n");
}

static void usage (void) __attribute__ ((noreturn));
static void
usage (void)
{
  fprintf (stderr, "usage: %s string\n", progname);
  exit (1);
}
int
main (int argc, char **argv)
{
  struct option o[] = {
    { "version", no_argument, NULL, 'v' },
    { NULL, 0, NULL, 0 }
  };
  int c;

  progname = strrchr (argv[0], '/');
  if (progname)
    progname++;
  else
    progname = argv[0];

  while ((c = getopt_long (argc, argv, "+ilrsc:f:n:p:qx:", o, NULL)) != -1)
    switch (c) {
    case 'v':
      version (progname, 1);
      exit (0);			/* XXX */
      break;
    default:
      usage ();
      break;
    }

  if (optind + 1 != argc)
    usage ();

  escape (argv[optind]);
  exit (0);
}