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