Add routines to open an ISO-9660 image independent of being part of a

CD.
2004-01-10 03:03:08 +00:00
parent 47599c3cd7
commit 3d6e147070
10 changed files with 365 additions and 31 deletions
--- a/example/sample7.c
+++ b/example/sample7.c
@@ -0,0 +1,110 @@
+/*
+  $Id: sample7.c,v 1.1 2004/01/10 03:03:08 rocky Exp $
+
+  Copyright (C) 2004 Rocky Bernstein <rocky@panix.com>
+  
+  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 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, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+/* Simple program to show using libiso9660 to extract a file. 
+ */
+/* This is the ISO 9660 image. */
+#define ISO9660_IMAGE_PATH "../"
+#define ISO9660_IMAGE ISO9660_IMAGE_PATH "test/copying.iso"
+
+#define ISO9660_FILENAME "/COPYING.;1"
+#define LOCAL_FILENAME "copying"
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include <sys/types.h>
+#include <cdio/cdio.h>
+#include <cdio/iso9660.h>
+
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+
+int
+main(int argc, const char *argv[])
+{
+  iso9660_stat_t *statbuf;
+  FILE *outfd;
+  int i;
+  
+  iso9660_t *iso = iso9660_open (ISO9660_IMAGE);
+  
+  if (NULL == iso) {
+    fprintf(stderr, "Sorry, couldn't open ISO 9660 image %s\n", ISO9660_IMAGE);
+    return 1;
+  }
+
+  statbuf = iso9660_ifs_stat (iso, ISO9660_FILENAME);
+
+  if (NULL == statbuf) 
+    {
+      fprintf(stderr, 
+	      "Could not get ISO-9660 file information for file %s\n",
+	      ISO9660_FILENAME);
+      return 2;
+    }
+
+  if (!(outfd = fopen ("copying", "wb")))
+    {
+      perror ("fopen()");
+      return 3;
+    }
+
+  /* Copy the blocks from the ISO-9660 filesystem to the local filesystem. */
+  for (i = 0; i < statbuf->size; i += ISO_BLOCKSIZE)
+    {
+      char buf[ISO_BLOCKSIZE];
+
+      memset (buf, 0, ISO_BLOCKSIZE);
+      
+      if ( ISO_BLOCKSIZE != iso9660_iso_seek_read (iso, buf, statbuf->lsn 
+						   + (i / ISO_BLOCKSIZE),
+						   1) )
+      {
+	fprintf(stderr, "Error reading ISO 9660 file at lsn %d\n",
+		statbuf->lsn + (i / ISO_BLOCKSIZE));
+	return 4;
+      }
+      
+      
+      fwrite (buf, ISO_BLOCKSIZE, 1, outfd);
+      
+      if (ferror (outfd))
+	{
+	  perror ("fwrite()");
+	  return 5;
+	}
+    }
+  
+  fflush (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 (outfd), statbuf->size))
+    perror ("ftruncate()");
+
+  fclose (outfd);
+  iso9660_close(iso);
+  return 0;
+}