/*      $NetBSD: mount_sysvbfs.c,v 1.8 2011/08/29 14:35:02 joerg 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/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1993, 1994\
 The Regents of the University of California.  All rights reserved.");
#endif /* not lint */

#ifndef lint
__RCSID("$NetBSD: mount_sysvbfs.c,v 1.8 2011/08/29 14:35:02 joerg Exp $");
#endif /* not lint */

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

#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>

#include <string.h>
#include <unistd.h>

#include <mntopts.h>

#include "mountprog.h"
#include "mount_sysvbfs.h"

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

__dead static void
sysvbfs_usage(void)
{

        (void)fprintf(stderr, "usage: %s [-o options] special node\n",
            getprogname());
        exit(EXIT_FAILURE);
}

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

        return mount_sysvbfs(argc, argv);
}
#endif

void
mount_sysvbfs_parseargs(int argc, char **argv,
        struct sysvbfs_args *args, int *mntflags,
        char *canon_dev, char *canon_dir)
{
        int ch;
        mntoptparse_t mp;

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

        if (argc != 2)
                sysvbfs_usage();

        pathadj(argv[0], canon_dev);
        args->fspec = canon_dev;
        pathadj(argv[1], canon_dir);
}

int
mount_sysvbfs(int argc, char *argv[])
{
        struct sysvbfs_args args;
        char canon_dev[MAXPATHLEN], canon_dir[MAXPATHLEN];
        const char *errcause;
        int mntflags;

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

        if (mount(MOUNT_SYSVBFS, canon_dir, mntflags, &args, sizeof args)==-1) {
                switch (errno) {
                case EMFILE:
                        errcause = "mount table full";
                        break;
                case EINVAL:
                        if (mntflags & MNT_UPDATE)
                                errcause =
                            "specified device does not match mounted device";
                        else
                                errcause = "incorrect super block";
                        break;
                default:
                        errcause = strerror(errno);
                        break;
                }
                errx(EXIT_FAILURE, "%s on %s: %s",
                    canon_dev, canon_dir, errcause);
        }
        exit(EXIT_SUCCESS);
}