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/*
Copyright (C) 2004, 2006, 2008, 2009 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 an
ISO-9660 image.
If a single argument is given, it is used as the ISO 9660 image to
use in the extraction. Otherwise a compiled in default ISO 9660 image
name (that comes with the libcdio distribution) will be used.
*/
/* This is the ISO 9660 image. */
#define ISO9660_IMAGE_PATH "../../"
#define ISO9660_IMAGE ISO9660_IMAGE_PATH "test/copying.iso"
#define LOCAL_FILENAME "copying"
#include <sys/types.h>
#include <cdio/cdio.h>
#include <cdio/iso9660.h>
#include "portable.h"
#include <stdio.h>
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.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
#define CEILING(x, y) ((x+(y-1))/y)
#define my_exit(rc) \
fclose (p_outfd); \
free(p_statbuf); \
iso9660_close(p_iso); \
return rc; \
int
main(int argc, const char *argv[])
{
iso9660_stat_t *p_statbuf;
FILE *p_outfd;
unsigned int i;
char const *psz_image;
char const *psz_fname;
iso9660_t *p_iso;
if (argc > 3) {
printf("usage %s [ISO9660-image.ISO [filename]]\n", argv[0]);
printf("Extracts filename from ISO-9660-image.ISO.\n");
return 1;
}
if (argc > 1)
psz_image = argv[1];
else
psz_image = ISO9660_IMAGE;
if (argc > 2)
psz_fname = argv[2];
else
psz_fname = LOCAL_FILENAME;
p_iso = iso9660_open (psz_image);
if (NULL == p_iso) {
fprintf(stderr, "Sorry, couldn't open ISO 9660 image %s\n", psz_image);
return 1;
}
p_statbuf = iso9660_ifs_stat_translate (p_iso, psz_fname);
if (NULL == p_statbuf)
{
fprintf(stderr,
"Could not get ISO-9660 file information for file %s\n",
psz_fname);
iso9660_close(p_iso);
return 2;
}
if (!(p_outfd = fopen (psz_fname, "wb")))
{
perror ("fopen()");
free(p_statbuf);
iso9660_close(p_iso);
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 ( ISO_BLOCKSIZE != iso9660_iso_seek_read (p_iso, buf, lsn, 1) )
{
fprintf(stderr, "Error reading ISO 9660 file %s at LSN %lu\n",
psz_fname, (long unsigned int) 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",
psz_fname, psz_image);
my_exit(0);
}
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