text: /*
   * Copyright (c) 1992, 1993, 1994
   *      The Regents of the University of California.  All rights reserved.
   *
   * This code is derived from software contributed to Berkeley
   * by Pace Willisson (pace@blitz.com).  The Rock Ridge Extension
   * Support code is derived from software contributed to Berkeley
   * by Atsushi Murai (amurai@spec.co.jp).
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   *      @(#)mount_cd9660.c	8.7 (Berkeley) 5/1/95
   *
   * @(#) Copyright (c) 1992, 1993, 1994 The Regents of the University of California.  All rights reserved.
   * @(#)mount_cd9660.c	8.7 (Berkeley) 5/1/95
   * $FreeBSD: src/sbin/mount_cd9660/mount_cd9660.c,v 1.15.2.3 2001/03/14 12:05:01 bp Exp $
   */
  
  #include <sys/cdio.h>
  #include <sys/param.h>
  #include <sys/mount.h>
  #include <sys/iconv.h>
  #include <sys/linker.h>
  #include <sys/module.h>
  #include <vfs/isofs/cd9660/cd9660_mount.h>
  
  #include <err.h>
  #include <errno.h>
  #include <fcntl.h>
  #include <mntopts.h>
  #include <stdlib.h>
  #include <stdio.h>
  #include <string.h>
  #include <locale.h>
  #include <sysexits.h>
  #include <unistd.h>
  
  struct mntopt mopts[] = {
  	MOPT_STDOPTS,
  	MOPT_UPDATE,
  	{ "extatt", 0, ISOFSMNT_EXTATT, 1 },
  	{ "gens", 0, ISOFSMNT_GENS, 1 },
  	{ "rrip", 1, ISOFSMNT_NORRIP, 1 },
  	{ "joliet", 1, ISOFSMNT_NOJOLIET, 1 },
  	{ "strictjoliet", 1, ISOFSMNT_BROKENJOLIET, 1 },
  	MOPT_NULL
  };
  
  static int	get_ssector(const char *dev);
  static void	usage(void);
  int set_charset(struct iso_args *args, const char *cs_local, const char *cs_disk);
  
  int
  main(int argc, char **argv)
  {
  	struct iso_args args;
  	int ch, mntflags, opts;
  	char *dev, *dir, mntpath[MAXPATHLEN];
  	struct vfsconf vfc;
  	int error, verbose;
  	const char *quirk;
  	char *cs_local = NULL;
  
  	mntflags = opts = verbose = 0;
  	memset(&args, 0, sizeof args);
  	args.ssector = -1;
  	while ((ch = getopt(argc, argv, "begjo:rs:C:v")) != -1)
  		switch (ch) {
  		case 'b':
  			opts |= ISOFSMNT_BROKENJOLIET;
  			break;
  		case 'e':
  			opts |= ISOFSMNT_EXTATT;
  			break;
  		case 'g':
  			opts |= ISOFSMNT_GENS;
  			break;
  		case 'j':
  			opts |= ISOFSMNT_NOJOLIET;
  			break;
  		case 'C':
  			quirk = kiconv_quirkcs(optarg, KICONV_VENDOR_MICSFT);
  			cs_local = strdup(quirk);
  			if (set_charset(&args, cs_local, NULL) == -1)
  				err(EX_OSERR, "cd9660_iconv");
  			opts |= ISOFSMNT_KICONV;
  			break;
  		case 'o':
  			getmntopts(optarg, mopts, &mntflags, &opts);
  			break;
  		case 'r':
  			opts |= ISOFSMNT_NORRIP;
  			break;
  		case 's':
  			args.ssector = atoi(optarg);
  			break;
  		case 'v':
  			verbose++;
  			break;
  		case '?':
  		default:
  			usage();
  		}
  	argc -= optind;
  	argv += optind;
  
  	if (argc != 2)
  		usage();
  
  	dev = argv[0];
  	dir = argv[1];
  
  	/*
  	 * Resolve the mountpoint with realpath(3) and remove unnecessary
  	 * slashes from the devicename if there are any.
  	 */
  	checkpath(dir, mntpath);
  	rmslashes(dev, dev);
  
  #define DEFAULT_ROOTUID	-2
  	/*
  	 * ISO 9660 filesystems are not writeable.
  	 */
  	mntflags |= MNT_RDONLY;
  	args.export.ex_flags = MNT_EXRDONLY;
  	args.fspec = dev;
  	args.export.ex_root = DEFAULT_ROOTUID;
  	args.flags = opts;
  
  	if (args.ssector == -1) {
  		/*
  		 * The start of the session has not been specified on
  		 * the command line.  If we can successfully read the
  		 * TOC of a CD-ROM, use the last data track we find.
  		 * Otherwise, just use 0, in order to mount the very
  		 * first session.  This is compatible with the
  		 * historic behaviour of mount_cd9660(8).  If the user
  		 * has specified -s <ssector> above, we don't get here
  		 * and leave the user's will.
  		 */
  		if ((args.ssector = get_ssector(dev)) == -1) {
  			if (verbose)
  				printf("could not determine starting sector, "
  				       "using very first session\n");
  			args.ssector = 0;
  		} else if (verbose)
  			printf("using starting sector %d\n", args.ssector);
  	}
  
  	error = getvfsbyname("cd9660", &vfc);
  	if (error && vfsisloadable("cd9660")) {
  		if (vfsload("cd9660"))
  			err(EX_OSERR, "vfsload(cd9660)");
  		endvfsent();	/* flush cache */
  		error = getvfsbyname("cd9660", &vfc);
  	}
  	if (error)
  		errx(1, "cd9660 filesystem is not available");
  
  	if (mount(vfc.vfc_name, mntpath, mntflags, &args) < 0)
  		err(1, "%s", args.fspec);
  	exit(0);
  }
  
  int
  set_charset(struct iso_args *args, const char *cs_local, const char *cs_disk)
  {
          int error;
          if (modfind("cd9660_iconv") < 0) {
                  if (kldload("cd9660_iconv") < 0 || modfind("cd9660_iconv") < 0)
                  {
                          warnx("cannot find or load \"cd9660_iconv\" kernel module");
                          return (-1);
                  }
          }
          snprintf(args->cs_local, ICONV_CSNMAXLEN, "%s", cs_local);
          error = kiconv_add_xlat16_cspairs(ENCODING_UNICODE, cs_local);
          if (error)
                  return (-1);
          if (!cs_disk)
                  cs_disk = strdup(ENCODING_UNICODE);
          snprintf(args->cs_disk, ICONV_CSNMAXLEN, "%s", cs_disk);
          error = kiconv_add_xlat16_cspairs(cs_disk, cs_local);
          if (error)
                  return (-1);
          return (0);
  }
  
  
  static void
  usage(void)
  {
  	fprintf(stderr,
  	    "usage: mount_cd9660 [-begjrv] [-C charset] [-o options] [-s startsector] special node\n");
  	exit(EX_USAGE);
  }
  
  static int
  get_ssector(const char *dev)
  {
  	struct ioc_toc_header h;
  	struct ioc_read_toc_entry t;
  	struct cd_toc_entry toc_buffer[100];
  	int fd, ntocentries, i;
  
  	if ((fd = open(dev, O_RDONLY)) == -1)
  		return -1;
  	if (ioctl(fd, CDIOREADTOCHEADER, &h) == -1) {
  		close(fd);
  		return -1;
  	}
  
  	ntocentries = h.ending_track - h.starting_track + 1;
  	if (ntocentries > 100) {
  		/* unreasonable, only 100 allowed */
  		close(fd);
  		return -1;
  	}
  	t.address_format = CD_LBA_FORMAT;
  	t.starting_track = 0;
  	t.data_len = ntocentries * sizeof(struct cd_toc_entry);
  	t.data = toc_buffer;
  
  	if (ioctl(fd, CDIOREADTOCENTRYS, (char *) &t) == -1) {
  		close(fd);
  		return -1;
  	}
  	close(fd);
  	
  	for (i = ntocentries - 1; i >= 0; i--)
  		if ((toc_buffer[i].control & 4) != 0)
  			/* found a data track */
  			break;
  	if (i < 0)
  		return -1;
  
  	return ntohl(toc_buffer[i].addr.lba);
  }
  