/*      $OpenBSD: mount_ext2fs.c,v 1.20 2022/12/04 23:50:46 cheloha Exp $       */
/*      $NetBSD: mount_ffs.c,v 1.3 1996/04/13 01:31:19 jtc Exp $        */

/*-
 * Copyright (c) 1993, 1994
 *      The Regents of the University of California.  All rights reserved.
 *
 * 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.
 */

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

#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>

#include "mntopts.h"

void    ext2fs_usage(void);

static const struct mntopt mopts[] = {
        MOPT_STDOPTS,
        MOPT_UPDATE,
        { NULL }
};

int
main(int argc, char *argv[])
{
        struct ufs_args args;           /* XXX ffs_args */
        int ch, mntflags;
        char fs_name[PATH_MAX], *errcause;

        mntflags = 0;
        optind = optreset = 1;          /* Reset for parse of new argv. */
        while ((ch = getopt(argc, argv, "o:")) != -1)
                switch (ch) {
                case 'o':
                        getmntopts(optarg, mopts, &mntflags);
                        break;
                default:
                        ext2fs_usage();
                }
        argc -= optind;
        argv += optind;

        if (argc != 2)
                ext2fs_usage();

        args.fspec = argv[0];           /* The name of the device file. */
        if (realpath(argv[1], fs_name) == NULL) /* The mount point. */
                err(1, "realpath %s", argv[1]);

#define DEFAULT_ROOTUID -2
        args.export_info.ex_root = DEFAULT_ROOTUID;
        if (mntflags & MNT_RDONLY)
                args.export_info.ex_flags = MNT_EXRDONLY;
        else
                args.export_info.ex_flags = 0;

        if (mount(MOUNT_EXT2FS, fs_name, mntflags, &args) == -1) {
                switch (errno) {
                case EMFILE:
                        errcause = "mount table full";
                        break;
                case EINVAL:
                        errcause =
                            "specified device does not match mounted device";
                        break;
                case EOPNOTSUPP:
                        errcause = "filesystem not supported by kernel";
                        break;
                default:
                        errcause = strerror(errno);
                        break;
                }
                errx(1, "%s on %s: %s", args.fspec, fs_name, errcause);
        }
        exit(0);
}

void
ext2fs_usage(void)
{
        (void)fprintf(stderr,
                "usage: mount_ext2fs [-o options] special node\n");
        exit(1);
}