/*      $NetBSD: mount_cd9660.c,v 1.35 2024/02/03 15:47:44 wiz Exp $    */

/*
 * 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
 */

#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1992, 1993, 1994\
 The Regents of the University of California.  All rights reserved.");
#endif /* not lint */

#ifndef lint
#if 0
static char sccsid[] = "@(#)mount_cd9660.c      8.7 (Berkeley) 5/1/95";
#else
__RCSID("$NetBSD: mount_cd9660.c,v 1.35 2024/02/03 15:47:44 wiz Exp $");
#endif
#endif /* not lint */

#include <sys/param.h>
#include <sys/mount.h>

#include <err.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <util.h>

#include <isofs/cd9660/cd9660_mount.h>

#include <mntopts.h>

#include "mountprog.h"
#include "mount_cd9660.h"

static const struct mntopt mopts[] = {
        MOPT_STDOPTS,
        MOPT_UPDATE,
        MOPT_GETARGS,
        { "extatt", 0, ISOFSMNT_EXTATT, 1 },
        { "gens", 0, ISOFSMNT_GENS, 1 },
        { "maplcase", 1, ISOFSMNT_NOCASETRANS, 1 },
        { "casetrans", 1, ISOFSMNT_NOCASETRANS, 1 },
        { "nrr", 0, ISOFSMNT_NORRIP, 1 },
        { "rrip", 1, ISOFSMNT_NORRIP, 1 },
        { "joliet", 1, ISOFSMNT_NOJOLIET, 1 },
        { "rrcaseins", 0, ISOFSMNT_RRCASEINS, 1 },
        MOPT_NULL,
};

__dead static void      usage(void);

#ifndef MOUNT_NOMAIN
int
main(int argc, char **argv)
{

        setprogname(argv[0]);
        return mount_cd9660(argc, argv);
}
#endif

void
mount_cd9660_parseargs(int argc, char **argv,
        struct iso_args *args, int *mntflags,
        char *canon_dev, char *canon_dir)
{
        struct stat sb;
        int ch, opts, set_gid, set_uid, set_mask, set_dirmask;
        mntoptparse_t mp;
        char *dev, *dir;

        memset(args, 0, sizeof(*args));
        *mntflags = opts = set_gid = set_uid = set_mask = set_dirmask = 0;
        optind = optreset = 1;
        while ((ch = getopt(argc, argv, "egG:jM:m:o:rU:")) != -1)
                switch (ch) {
                case 'e':
                        /* obsolete, retained for compatibility only, use
                         * -o extatt */
                        opts |= ISOFSMNT_EXTATT;
                        break;
                case 'g':
                        /* obsolete, retained for compatibility only, use
                         * -o gens */
                        opts |= ISOFSMNT_GENS;
                        break;
                case 'G':
                        opts |= ISOFSMNT_GID;
                        args->gid = a_gid(optarg);
                        set_gid = 1;
                        break;
                case 'm':
                        args->fmask = a_mask(optarg);
                        set_mask = 1;
                        break;
                case 'M':
                        args->dmask = a_mask(optarg);
                        set_dirmask = 1;
                        break;
                case 'j':
                        /* obsolete, retained fo compatibility only, use
                         * -o nojoliet */
                        opts |= ISOFSMNT_NOJOLIET;
                        break;
                case 'o':
                        mp = getmntopts(optarg, mopts, mntflags, &opts);
                        if (mp == NULL)
                                err(1, "getmntopts");
                        freemntopts(mp);
                        break;
                case 'r':
                        /* obsolete, retained for compatibility only, use
                         * -o norrip */
                        opts |= ISOFSMNT_NORRIP;
                        break;
                case 'U':
                        opts |= ISOFSMNT_UID;
                        args->uid = a_uid(optarg);
                        set_uid = 1;
                        break;
                case '?':
                default:
                        usage();
                }

        argc -= optind;
        argv += optind;

        if (argc != 2)
                usage();

        if (set_mask && !set_dirmask) {
                args->dmask = args->fmask;
                set_dirmask = 1;
        } else if (set_dirmask && !set_mask) {
                args->fmask = args->dmask;
                set_mask = 1;
        }

        dev = argv[0];
        dir = argv[1];

        pathadj(dev, canon_dev);
        pathadj(dir, canon_dir);

#define DEFAULT_ROOTUID -2
        /*
         * ISO 9660 filesystems are not writable.
         */
        if ((*mntflags & MNT_GETARGS) == 0)
                *mntflags |= MNT_RDONLY;
        args->fspec = canon_dev;
        args->flags = opts;

        if (!set_gid || !set_uid || !set_mask) {
                if (stat(dir, &sb) == -1)
                        err(1, "stat %s", dir);

                if (!set_uid)
                        args->uid = sb.st_uid;
                if (!set_gid)
                        args->gid = sb.st_gid;
                if (!set_mask) {
                        args->fmask = args->dmask =
                                sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
                }
        }
}

int
mount_cd9660(int argc, char **argv)
{
        struct iso_args args;
        char canon_dev[MAXPATHLEN], canon_dir[MAXPATHLEN];
        int mntflags;

        mount_cd9660_parseargs(argc, argv, &args, &mntflags,
            canon_dev, canon_dir);

        if (mount(MOUNT_CD9660, canon_dir, mntflags, &args, sizeof args) == -1)
                err(1, "%s on %s", canon_dev, canon_dir);
        if (mntflags & MNT_GETARGS) {
                char buf[2048];
                (void)snprintb(buf, sizeof(buf), ISOFSMNT_BITS, args.flags);
                printf("%s\n", buf);
        }

        exit(0);
        /* NOTREACHED */
}

static void
usage(void)
{
        (void)fprintf(stderr,
                "usage: %s [-G gid] [-M mask] [-m mask] [-o options] [-U uid] special node\n", getprogname());
        exit(1);
}