contrib/amd/libamu/hasmntopt.c

   1 /*
   2  * Copyright (c) 1997-1999 Erez Zadok
   3  * Copyright (c) 1990 Jan-Simon Pendry
   4  * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
   5  * Copyright (c) 1990 The Regents of the University of California.
   6  * All rights reserved.
   7  *
   8  * This code is derived from software contributed to Berkeley by
   9  * Jan-Simon Pendry at Imperial College, London.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12 n * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgment:
  21  *      This product includes software developed by the University of
  22  *      California, Berkeley and its contributors.
  23  * 4. Neither the name of the University nor the names of its contributors
  24  *    may be used to endorse or promote products derived from this software
  25  *    without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  37  * SUCH DAMAGE.
  38  *
  39  *      %W% (Berkeley) %G%
  40  *
  41  * $Id: hasmntopt.c,v 1.2 1999/01/10 21:54:37 ezk Exp $
  42  *
  43  */
  44
  45 #ifdef HAVE_CONFIG_H
  46 # include <config.h>
  47 #endif /* HAVE_CONFIG_H */
  48 #include <am_defs.h>
  49 #include <amu.h>
  50
  51 #ifndef MNTMAXSTR
  52 # define MNTMAXSTR      128
  53 #endif /* not MNTMAXSTR */
  54
  55
  56 /*
  57  * Some systems don't provide these to the user,
  58  * but amd needs them, so...
  59  *
  60  * From: Piete Brooks <pb@cl.cam.ac.uk>
  61  */
  62
  63 static char *
  64 nextmntopt(char **p)
  65 {
  66   char *cp = *p;
  67   char *rp;
  68
  69   /*
  70    * Skip past white space
  71    */
  72   while (*cp && isspace(*cp))
  73     cp++;
  74
  75   /*
  76    * Word starts here
  77    */
  78   rp = cp;
  79
  80   /*
  81    * Scan to send of string or separator
  82    */
  83   while (*cp && *cp != ',')
  84     cp++;
  85
  86   /*
  87    * If separator found the overwrite with null char.
  88    */
  89   if (*cp) {
  90     *cp = '\0';
  91     cp++;
  92   }
  93
  94   /*
  95    * Return value for next call
  96    */
  97   *p = cp;
  98   return rp;
  99 }
 100
 101 /*
 102  * replacement for hasmntopt if the system does not have it.
 103  */
 104 char *
 105 hasmntopt(mntent_t *mnt, char *opt)
 106 {
 107   char t[MNTMAXSTR];
 108   char *f;
 109   char *o = t;
 110   int l = strlen(opt);
 111
 112   strcpy(t, mnt->mnt_opts);
 113
 114   while (*(f = nextmntopt(&o)))
 115     if (NSTREQ(opt, f, l))
 116       return f - t + mnt->mnt_opts;
 117
 118   return 0;
 119 }