contrib/amd/libamu/mtab.c

   1 /*
   2  * Copyright (c) 1997-1999 Erez Zadok
   3  * Copyright (c) 1989 Jan-Simon Pendry
   4  * Copyright (c) 1989 Imperial College of Science, Technology & Medicine
   5  * Copyright (c) 1989 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  * 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: mtab.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
  52 /*
  53  * Firewall /etc/mtab entries
  54  */
  55 void
  56 mnt_free(mntent_t *mp)
  57 {
  58   XFREE(mp->mnt_fsname);
  59   XFREE(mp->mnt_dir);
  60   XFREE(mp->mnt_type);
  61   XFREE(mp->mnt_opts);
  62
  63 #ifdef HAVE_FIELD_MNTENT_T_MNT_TIME
  64 # ifdef HAVE_FIELD_MNTENT_T_MNT_TIME_STRING
  65   XFREE(mp->mnt_time);
  66 # endif /* HAVE_FIELD_MNTENT_T_MNT_TIME_STRING */
  67 #endif /* HAVE_FIELD_MNTENT_T_MNT_TIME */
  68
  69   XFREE(mp);
  70 }
  71
  72
  73 /*
  74  * Discard memory allocated for mount list
  75  */
  76 void
  77 discard_mntlist(mntlist *mp)
  78 {
  79   mntlist *mp2;
  80
  81   while ((mp2 = mp)) {
  82     mp = mp->mnext;
  83     if (mp2->mnt)
  84       mnt_free(mp2->mnt);
  85     XFREE(mp2);
  86   }
  87 }
  88
  89
  90 /*
  91  * Throw away a mount list
  92  */
  93 void
  94 free_mntlist(mntlist *mp)
  95 {
  96   discard_mntlist(mp);
  97 #ifdef MOUNT_TABLE_ON_FILE
  98   unlock_mntlist();
  99 #endif /* MOUNT_TABLE_ON_FILE */
 100 }
 101
 102
 103 /*
 104  * Utility routine which determines the value of a
 105  * numeric option in the mount options (such as port=%d).
 106  * Returns 0 if the option is not specified.
 107  */
 108 int
 109 hasmntval(mntent_t *mnt, char *opt)
 110 {
 111   char *str = hasmntopt(mnt, opt);
 112
 113   if (str) {
 114     char *eq = strchr(str, '=');
 115     if (eq)
 116       return atoi(eq + 1);
 117     else
 118       plog(XLOG_USER, "bad numeric option \"%s\" in \"%s\"", opt, str);
 119   }
 120   return 0;
 121 }