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. 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  * @(#)vfslist.c        8.1 (Berkeley) 5/8/95
  34  * $FreeBSD: src/sbin/mount/vfslist.c,v 1.4 1999/08/28 00:13:27 peter Exp $
  35  * $DragonFly: src/sbin/mount/vfslist.c,v 1.3 2003/09/28 14:39:18 hmp Exp $
  36  */
  37
  38 #include <err.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41
  42 #include "extern.h"
  43
  44 static int        skipvfs;
  45
  46 int
  47 checkvfsname(const char *vfsname, const char **vfslist)
  48 {
  49
  50         if (vfslist == NULL)
  51                 return (0);
  52         while (*vfslist != NULL) {
  53                 if (strcmp(vfsname, *vfslist) == 0)
  54                         return (skipvfs);
  55                 ++vfslist;
  56         }
  57         return (!skipvfs);
  58 }
  59
  60 const char **
  61 makevfslist(char *fslist)
  62 {
  63         const char **av;
  64         int i;
  65         char *nextcp;
  66
  67         if (fslist == NULL)
  68                 return (NULL);
  69         if (fslist[0] == 'n' && fslist[1] == 'o') {
  70                 fslist += 2;
  71                 skipvfs = 1;
  72         }
  73         for (i = 0, nextcp = fslist; *nextcp; nextcp++)
  74                 if (*nextcp == ',')
  75                         i++;
  76         if ((av = malloc((size_t)(i + 2) * sizeof(char *))) == NULL) {
  77                 warnx("malloc failed");
  78                 return (NULL);
  79         }
  80         nextcp = fslist;
  81         i = 0;
  82         av[i++] = nextcp;
  83         while ((nextcp = strchr(nextcp, ',')) != NULL) {
  84                 *nextcp++ = '\0';
  85                 av[i++] = nextcp;
  86         }
  87         av[i++] = NULL;
  88         return (av);
  89 }