df/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
  34 #include <sys/cdefs.h>
  35 #ifndef lint
  36 #if 0
  37 static char sccsid[] = "@(#)vfslist.c   8.1 (Berkeley) 5/8/95";
  38 #endif
  39 __used static const char rcsid[] =
  40   "$FreeBSD: src/sbin/mount/vfslist.c,v 1.4 1999/08/28 00:13:27 peter Exp $";
  41 #endif /* not lint */
  42
  43 #include <err.h>
  44 #include <stdlib.h>
  45 #include <string.h>
  46
  47 #ifndef __APPLE__
  48 #include "extern.h"
  49 #endif
  50
  51 static int        skipvfs;
  52
  53 int checkvfsname(const char *, const char **);
  54 const char **makevfslist(const char *);
  55
  56 int
  57 checkvfsname(vfsname, vfslist)
  58         const char *vfsname;
  59         const char **vfslist;
  60 {
  61
  62         if (vfslist == NULL)
  63                 return (0);
  64         while (*vfslist != NULL) {
  65                 if (strcmp(vfsname, *vfslist) == 0)
  66                         return (skipvfs);
  67                 ++vfslist;
  68         }
  69         return (!skipvfs);
  70 }
  71
  72 const char **
  73 makevfslist(fslist)
  74         const char *fslist;
  75 {
  76         const char **av;
  77         int i;
  78         const char *cnextcp;
  79         char *nextcp;
  80
  81         if (fslist == NULL)
  82                 return (NULL);
  83         if (fslist[0] == 'n' && fslist[1] == 'o') {
  84                 fslist += 2;
  85                 skipvfs = 1;
  86         }
  87         for (i = 0, cnextcp = fslist; *cnextcp; cnextcp++)
  88                 if (*cnextcp == ',')
  89                         i++;
  90         if ((av = malloc((size_t)(i + 2) * sizeof(char *))) == NULL) {
  91                 warnx("malloc failed");
  92                 return (NULL);
  93         }
  94         nextcp = strdup(fslist);
  95         i = 0;
  96         av[i++] = nextcp;
  97         while ((nextcp = strchr(nextcp, ',')) != NULL) {
  98                 *nextcp++ = '\0';
  99                 av[i++] = nextcp;
 100         }
 101         av[i++] = NULL;
 102         return (av);
 103 }