/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1992, 1993, 1994
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software donated to Berkeley by
 * Jan-Simon Pendry.
 *
 * 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/param.h>
#include <sys/mount.h>

#include <err.h>
#include <getopt.h>
#include <libgen.h>
#include <mntopts.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "extern.h"

static struct mntopt mopts[] = {
        MOPT_STDOPTS,
        MOPT_END
};

static void
usage(void)
{
        (void)fprintf(stderr,
                "usage: mount [-t fstype] [-o options] target_fs mount_point\n");
        exit(1);
}

int
mount_fs(const char *vfstype, int argc, char *argv[])
{
        struct iovec *iov;
        int iovlen;
        int mntflags = 0;
        int ch;
        char *dev, *dir, mntpath[MAXPATHLEN];
        char fstype[32];
        char errmsg[255];
        char *p, *val;

        strlcpy(fstype, vfstype, sizeof(fstype));
        memset(errmsg, 0, sizeof(errmsg));

        getmnt_silent = 1;
        iov = NULL;
        iovlen = 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, 0);
                        p = strchr(optarg, '=');
                        val = NULL;
                        if (p != NULL) {
                                *p = '\0';
                                val = p + 1;
                        }
                        build_iovec(&iov, &iovlen, optarg, val, (size_t)-1);
                        break;
                case '?':
                default:
                        usage();
                }
        }

        argc -= optind;
        argv += optind;
        if (argc != 2)
                usage();

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

        if (checkpath(dir, mntpath) != 0) {
                warn("%s", mntpath);
                return (1);
        }
        (void)rmslashes(dev, dev);

        build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1);
        build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1);
        build_iovec(&iov, &iovlen, "from", dev, (size_t)-1);
        build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg));

        if (nmount(iov, iovlen, mntflags) == -1) {
                if (*errmsg != '\0')
                        warn("%s: %s", dev, errmsg);
                else
                        warn("%s", dev);
                return (1);
        }
        return (0);
}