/*-
 * Copyright (c) 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.
 *
 * @(#)getmntopts.c     8.3 (Berkeley) 3/29/95
 * $FreeBSD: src/sbin/mount/getmntopts.c,v 1.9 1999/10/09 11:54:06 phk Exp $
 */

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

#include <err.h>
#include <errno.h>
#include <mntopts.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>

int getmnt_silent = 0;

void
getmntopts(const char *options, const struct mntopt *m0, int *flagp,
           int *altflagp)
{
        const struct mntopt *m;
        int negative;
        char *opt, *optbuf, *p;
        int *thisflagp;

        /* Copy option string, since it is about to be torn asunder... */
        if ((optbuf = strdup(options)) == NULL)
                err(1, NULL);

        for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
                /* Check for "no" prefix. */
                if (opt[0] == 'n' && opt[1] == 'o') {
                        negative = 1;
                        opt += 2;
                } else
                        negative = 0;

                /*
                 * for options with assignments in them (ie. quotas)
                 * ignore the assignment as it's handled elsewhere
                 */
                p = strchr(opt, '=');
                if (p)
                         *++p = '\0';

                /* Scan option table. */
                for (m = m0; m->m_option != NULL; ++m) {
                        if (strcasecmp(opt, m->m_option) == 0)
                                break;
                }

                /* Save flag, or fail if option is not recognized. */
                if (m->m_option) {
                        thisflagp = m->m_altloc ? altflagp : flagp;
                        if (negative == m->m_inverse)
                                *thisflagp |= m->m_flag;
                        else
                                *thisflagp &= ~m->m_flag;
                } else if (!getmnt_silent) {
                        errx(1, "-o %s: option not supported", opt);
                }
        }

        free(optbuf);
}

void
rmslashes(char *rrpin, char *rrpout)
{
        char *rrpoutstart;

        *rrpout = *rrpin;
        for (rrpoutstart = rrpout; *rrpin != '\0'; *rrpout++ = *rrpin++) {

                /* skip all double slashes */
                while (*rrpin == '/' && *(rrpin + 1) == '/')
                         rrpin++;
        }

        /* remove trailing slash if necessary */
        if (rrpout - rrpoutstart > 1 && *(rrpout - 1) == '/')
                *(rrpout - 1) = '\0';
        else
                *rrpout = '\0';
}

void
checkpath(const char *path, char *resolved)
{
        struct stat sb;

        if (realpath(path, resolved) != NULL && stat(resolved, &sb) == 0) {
                if (!S_ISDIR(sb.st_mode))
                        errx(EX_USAGE, "%s: not a directory", resolved);
        } else
                errx(EX_USAGE, "%s: %s", resolved, strerror(errno));
}