contrib/smbfs/mount_smbfs/getmntopts.c

   1 /*-
   2  * Copyright (c) 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifndef lint
  35 #if 0
  36 static char sccsid[] = "@(#)getmntopts.c        8.3 (Berkeley) 3/29/95";
  37 #else
  38 static const char rcsid[] =
  39         "$Id: getmntopts.c,v 1.1 2000/03/29 01:26:41 bp Exp $";
  40 #endif
  41 #endif /* not lint */
  42
  43 #include <sys/param.h>
  44
  45 #include <err.h>
  46 #include <stdlib.h>
  47 #include <string.h>
  48
  49 #include "mntopts.h"
  50
  51 int getmnt_silent = 0;
  52
  53 void
  54 getmntopts(const char *options, const struct mntopt *m0, int *flagp,
  55     int *altflagp)
  56 {
  57         const struct mntopt *m;
  58         int negative, len;
  59         char *opt, *optbuf, *p;
  60         int *thisflagp;
  61
  62         /* Copy option string, since it is about to be torn asunder... */
  63         if ((optbuf = strdup(options)) == NULL)
  64                 err(1, NULL);
  65
  66         for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
  67                 /* Check for "no" prefix. */
  68                 if (opt[0] == 'n' && opt[1] == 'o') {
  69                         negative = 1;
  70                         opt += 2;
  71                 } else
  72                         negative = 0;
  73
  74                 /*
  75                  * for options with assignments in them (ie. quotas)
  76                  * ignore the assignment as it's handled elsewhere
  77                  */
  78                 p = strchr(opt, '=');
  79                 if (p)
  80                          *++p = '\0';
  81
  82                 /* Scan option table. */
  83                 for (m = m0; m->m_option != NULL; ++m) {
  84                         len = strlen(m->m_option);
  85                         if (strncasecmp(opt, m->m_option, len) == 0)
  86                                 if (   m->m_option[len] == '\0'
  87                                     || m->m_option[len] == '='
  88                                    )
  89                                 break;
  90                 }
  91
  92                 /* Save flag, or fail if option is not recognized. */
  93                 if (m->m_option) {
  94                         thisflagp = m->m_altloc ? altflagp : flagp;
  95                         if (negative == m->m_inverse)
  96                                 *thisflagp |= m->m_flag;
  97                         else
  98                                 *thisflagp &= ~m->m_flag;
  99                 } else if (!getmnt_silent) {
 100                         errx(1, "-o %s: option not supported", opt);
 101                 }
 102         }
 103
 104         free(optbuf);
 105 }