sbin/mount/vfslist.c

   1 /*-
   2  * Copyright (c) 1995
   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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)vfslist.c        8.1 (Berkeley) 5/8/95
  30  * $FreeBSD: src/sbin/mount/vfslist.c,v 1.4 1999/08/28 00:13:27 peter Exp $
  31  * $DragonFly: src/sbin/mount/vfslist.c,v 1.3 2003/09/28 14:39:18 hmp Exp $
  32  */
  33
  34 #include <err.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37
  38 #include "extern.h"
  39
  40 static int        skipvfs;
  41
  42 int
  43 checkvfsname(const char *vfsname, const char **vfslist)
  44 {
  45
  46         if (vfslist == NULL)
  47                 return (0);
  48         while (*vfslist != NULL) {
  49                 if (strcmp(vfsname, *vfslist) == 0)
  50                         return (skipvfs);
  51                 ++vfslist;
  52         }
  53         return (!skipvfs);
  54 }
  55
  56 const char **
  57 makevfslist(char *fslist)
  58 {
  59         const char **av;
  60         int i;
  61         char *nextcp;
  62
  63         if (fslist == NULL)
  64                 return (NULL);
  65         if (fslist[0] == 'n' && fslist[1] == 'o') {
  66                 fslist += 2;
  67                 skipvfs = 1;
  68         }
  69         for (i = 0, nextcp = fslist; *nextcp; nextcp++)
  70                 if (*nextcp == ',')
  71                         i++;
  72         if ((av = malloc((size_t)(i + 2) * sizeof(char *))) == NULL) {
  73                 warnx("malloc failed");
  74                 return (NULL);
  75         }
  76         nextcp = fslist;
  77         i = 0;
  78         av[i++] = nextcp;
  79         while ((nextcp = strchr(nextcp, ',')) != NULL) {
  80                 *nextcp++ = '\0';
  81                 av[i++] = nextcp;
  82         }
  83         av[i++] = NULL;
  84         return (av);
  85 }