/*

  Copyright (C) 2003-2006, 2009, 2013 Rocky Bernstein <rocky@gnu.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 3 of the License, 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, see <http://www.gnu.org/licenses/>.

*/

/* Simple program to show using libiso9660 to extract a file from a

   CUE/BIN CD image.

   If a single argument is given, it is used as the CUE file of a CD image

   to use. Otherwise a compiled-in default image name (that

   comes with the libcdio distribution) will be used.

   This program can be compiled with either a C or C++ compiler. In

   the distribution we prefer C++ just to make sure we haven't broken

   things on the C++ side.

 */

/* This is the CD-image with an ISO-9660 filesystem */

#define ISO9660_IMAGE_PATH "../"

#define ISO9660_IMAGE ISO9660_IMAGE_PATH "test/data/isofs-m1.cue"

#define ISO9660_PATH "/"

#define ISO9660_FILENAME "COPYING"

#define LOCAL_FILENAME "copying"

/* portable.h has to come first else _FILE_OFFSET_BITS are redefined in

   say opensolaris. */

#include "portable.h"

#ifdef HAVE_SYS_TYPES_H

#include <sys/types.h>

#endif

#ifdef HAVE_STDLIB_H

#include <stdlib.h>

#endif

#ifdef HAVE_STDIO_H

#include <stdio.h>

#endif

#ifdef HAVE_ERRNO_H

#include <errno.h>

#endif

#ifdef HAVE_STRING_H

#include <string.h>

#endif

#ifdef HAVE_UNISTD_H

#include <unistd.h>

#endif

#ifdef HAVE_SYS_TYPES_H

#include <sys/types.h>

#endif

#include <cdio/cdio.h>

#include <cdio/iso9660.h>

#include <cdio/logging.h>

#define CEILING(x, y) ((x+(y-1))/y)

#define my_exit(rc)				\

  fclose (p_outfd);				\

  free(p_statbuf);				\

  cdio_destroy(p_cdio);				\

  return rc;					\

int

main(int argc, const char *argv[])

{

  iso9660_stat_t *p_statbuf;

  FILE *p_outfd;

  int i;

  char const *psz_image;

  char const *psz_fname;

  char translated_name[256];

  char untranslated_name[256] = ISO9660_PATH;

  CdIo_t *p_cdio;

  unsigned int i_fname=sizeof(ISO9660_FILENAME);

  if (argc > 3) {

    printf("usage %s [CD-ROM-or-image [filename]]\n", argv[0]);

    printf("Extracts filename from CD-ROM-or-image.\n");

    return 1;

  }

  if (argc > 1)

    psz_image = argv[1];

  else

    psz_image = ISO9660_IMAGE;

  if (argc > 2) {

    psz_fname = argv[2];

    i_fname   = strlen(psz_fname)+1;

  } else

    psz_fname = ISO9660_FILENAME;

  strncat(untranslated_name, psz_fname, i_fname);

  // cdio_loglevel_default = CDIO_LOG_DEBUG;

  p_cdio = cdio_open (psz_image, DRIVER_UNKNOWN);

  if (!p_cdio) {

    fprintf(stderr, "Sorry, couldn't open %s\n", psz_image);

    return 1;

  }

  p_statbuf = iso9660_fs_stat (p_cdio, untranslated_name);

  if (NULL == p_statbuf)

    {

      fprintf(stderr,

	      "Could not get ISO-9660 file information for file %s\n",

	      untranslated_name);

      cdio_destroy(p_cdio);

      return 2;

    }

  iso9660_name_translate(psz_fname, translated_name);

  if (!(p_outfd = fopen (translated_name, "wb"))) {

      perror ("fopen()");

      cdio_destroy(p_cdio);

      free(p_statbuf);

      return 3;

    }

  /* Copy the blocks from the ISO-9660 filesystem to the local filesystem. */

  {

    const unsigned int i_blocks = CEILING(p_statbuf->size, ISO_BLOCKSIZE);

    for (i = 0; i < i_blocks; i ++) {

	char buf[ISO_BLOCKSIZE];

	const lsn_t lsn = p_statbuf->lsn + i;

	memset (buf, 0, ISO_BLOCKSIZE);

	if ( 0 != cdio_read_data_sectors (p_cdio, buf, lsn, ISO_BLOCKSIZE, 1) )

	  {

	    fprintf(stderr, "Error reading ISO 9660 file at lsn %lu\n",

		    (long unsigned int) p_statbuf->lsn);

	    my_exit(4);

	  }

	fwrite (buf, ISO_BLOCKSIZE, 1, p_outfd);

	if (ferror (p_outfd)) {

	    perror ("fwrite()");

	    my_exit(5);

	}

      }

  }

  fflush (p_outfd);

  /* Make sure the file size has the exact same byte size. Without the

     truncate below, the file will a multiple of ISO_BLOCKSIZE.

   */

  if (ftruncate (fileno (p_outfd), p_statbuf->size))

    perror ("ftruncate()");

  printf("-- Extraction of file '%s' from '%s' successful.\n",

	 translated_name, untranslated_name);

  my_exit(0);

}