sbin/mount/vfslist.c

   1 /*      $NetBSD: vfslist.c,v 1.6 2005/06/26 21:43:33 christos Exp $     */
   2
   3 /*
   4  * Copyright (c) 1995
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)vfslist.c   8.1 (Berkeley) 5/8/95";
  36 #else
  37 __RCSID("$NetBSD: vfslist.c,v 1.6 2005/06/26 21:43:33 christos Exp $");
  38 #endif
  39 #endif /* not lint */
  40
  41 #include <err.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44 #include <unistd.h>
  45
  46 #include "mountprog.h"
  47
  48 static int        skipvfs;
  49
  50 int
  51 checkvfsname(const char *vfsname, const char **vfslist)
  52 {
  53
  54         if (vfslist == NULL)
  55                 return (0);
  56         while (*vfslist != NULL) {
  57                 if (strcmp(vfsname, *vfslist) == 0)
  58                         return (skipvfs);
  59                 ++vfslist;
  60         }
  61         return (!skipvfs);
  62 }
  63
  64 const char **
  65 makevfslist(const char *fslist)
  66 {
  67         const char **av;
  68         size_t i;
  69         char *nextcp, *fsl;
  70
  71         if (fslist == NULL)
  72                 return NULL;
  73
  74         if (fslist[0] == 'n' && fslist[1] == 'o') {
  75                 fslist += 2;
  76                 skipvfs = 1;
  77         }
  78         if ((fsl = strdup(fslist)) == NULL) {
  79                 warn("strdup");
  80                 return NULL;
  81         }
  82         for (i = 0, nextcp = fsl; *nextcp; nextcp++)
  83                 if (*nextcp == ',')
  84                         i++;
  85         if ((av = malloc((i + 2) * sizeof(char *))) == NULL) {
  86                 warn("malloc");
  87                 free(fsl);
  88                 return NULL;
  89         }
  90         nextcp = fsl;
  91         i = 0;
  92         av[i++] = nextcp;
  93         while ((nextcp = strchr(nextcp, ',')) != NULL) {
  94                 *nextcp++ = '\0';
  95                 av[i++] = nextcp;
  96         }
  97         av[i++] = NULL;
  98         return av;
  99 }