/*      $NetBSD: mount_autofs.c,v 1.5 2020/07/26 08:20:22 mlelstv Exp $ */

/*-
 * Copyright (c) 2018 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Christos Zoulas.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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
__RCSID("$NetBSD: mount_autofs.c,v 1.5 2020/07/26 08:20:22 mlelstv Exp $");
#endif /* not lint */

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

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

#include <mntopts.h>

#include <fs/autofs/autofs_mount.h>

#include "mountprog.h"
#include "mount_autofs.h"

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

int     mount_autofs(int argc, char **argv);
__dead static void      usage(void);

#ifndef MOUNT_NOMAIN
int
main(int argc, char **argv)
{
        return mount_autofs(argc, argv);
}
#endif

void
mount_autofs_parseargs(int argc, char *argv[], void *v, int *mntflags,
        char *canon_dev, char *canon_dir)
{
        int ch;
        mntoptparse_t mp;
        struct autofs_args *am = v;

        *mntflags = 0;
        while ((ch = getopt(argc, argv, "f:o:O:p:")) != -1)
                switch (ch) {
                case 'f':
                        strlcpy(am->from, optarg, MAXPATHLEN);
                        break;
                case 'o':
                        mp = getmntopts(optarg, mopts, mntflags, 0);
                        if (mp == NULL)
                                err(EXIT_FAILURE, "getmntopts");
                        freemntopts(mp);
                        break;
                case 'O':
                        strlcpy(am->master_options, optarg, MAXPATHLEN);
                        break;
                case 'p':
                        strlcpy(am->master_prefix, optarg, MAXPATHLEN);
                        break;
                case '?':
                default:
                        usage();
                }
        argc -= optind;
        argv += optind;

        if (argc != 2)
                usage();

        strlcpy(canon_dev, argv[0], MAXPATHLEN);
        pathadj(argv[1], canon_dir);
}

int
mount_autofs(int argc, char *argv[])
{
        char canon_dev[MAXPATHLEN], canon_dir[MAXPATHLEN];
        char from[MAXPATHLEN], master_options[MAXPATHLEN];
        char master_prefix[MAXPATHLEN];
        int mntflags;
        struct autofs_args am = {
                .from = from,
                .master_options = master_options,
                .master_prefix = master_prefix,
        };

        mount_autofs_parseargs(argc, argv, &am, &mntflags,
            canon_dev, canon_dir);
        if (mount(MOUNT_KERNFS, canon_dir, mntflags, &am, sizeof(am)) == -1)
                err(EXIT_FAILURE, "autofs on %s", canon_dir);
        if (mntflags & MNT_GETARGS) {
                printf("from=%s, master_options=%s, master_prefix=%s\n",
                    am.from, am.master_options, am.master_prefix);
        }

        return EXIT_SUCCESS;
}

static void
usage(void)
{
        (void)fprintf(stderr,
            "Usage: %s [-f from] [-O autofs_options] [-o options] [-p prefix] "
                "autofs mount_point\n", getprogname());
        exit(EXIT_FAILURE);
}