/*
 * Copyright (c) 1990 Jan-Simon Pendry
 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
 * Copyright (c) 1990, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Jan-Simon Pendry at Imperial College, London.
 *
 * 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.
 *
 *      from: @(#)mount_fs.c    8.1 (Berkeley) 6/6/93
 *      $Id: mount_fs.c,v 1.14 2014/10/20 06:55:59 guenther Exp $
 */

#include "am.h"

#include <unistd.h>
#include <sys/stat.h>

/*
 * Standard mount flags
 */

struct opt_tab mnt_flags[] = {
        { "ro",         MNT_RDONLY },
        { "nodev",      MNT_NODEV },
        { "noexec",     MNT_NOEXEC },
        { "nosuid",     MNT_NOSUID },
        { "sync",       MNT_SYNCHRONOUS },
        { 0, 0 }
};

int
compute_mount_flags(struct mntent *mnt)
{
        struct opt_tab *opt;
        int flags;
        flags = 0;

        /*
         * Crack basic mount options
         */
        for (opt = mnt_flags; opt->opt; opt++)
                flags |= hasmntopt(mnt, opt->opt) ? opt->flag : 0;

        return flags;
}

int
mount_fs(struct mntent *mnt, int flags, caddr_t mnt_data, int retry,
    const char *type)
{
        int error = 0;

#ifdef DEBUG
        dlog("%s fstype %s (%s) flags %#x (%s)",
                mnt->mnt_dir, type, mnt->mnt_type, flags, mnt->mnt_opts);
#endif /* DEBUG */

        /*
         * Fake some mount table entries for the automounter
         */

again:
        clock_valid = 0;
        error = mount(type, mnt->mnt_dir, flags, mnt_data);

        if (error < 0)
                plog(XLOG_ERROR, "%s: mount: %m", mnt->mnt_dir);
        if (error < 0 && --retry > 0) {
                sleep(1);
                goto again;
        }
        if (error < 0) {
#ifdef notdef
                if (automount)
                        going_down(errno);
#endif
                return errno;
        }


        return 0;
}

/*
 * Some systems don't provide these to the user,
 * but amd needs them, so...
 *
 * From: Piete Brooks <pb@cl.cam.ac.uk>
 */

#include <ctype.h>

static char *
nextmntopt(char **p)
{
        char *cp = *p;
        char *rp;
        /*
         * Skip past white space
         */
        while (isspace((unsigned char)*cp))
                cp++;
        /*
         * Word starts here
         */
        rp = cp;
        /*
         * Scan to send of string or separator
         */
        while (*cp && *cp != ',')
                cp++;
        /*
         * If separator found the overwrite with nul char.
         */
        if (*cp) {
                *cp = '\0';
                cp++;
        }
        /*
         * Return value for next call
         */
        *p = cp;
        return rp;
}

char *
hasmntopt(struct mntent *mnt, char *opt)
{
        char t[MNTMAXSTR];
        char *f;
        char *o = t;
        int l = strlen(opt);

        strlcpy(t, mnt->mnt_opts, sizeof(t));

        while (*(f = nextmntopt(&o)))
                if (strncmp(opt, f, l) == 0)
                        return f - t + mnt->mnt_opts;

        return 0;
}