external/bsd/am-utils/dist/conf/mtab/mtab_bsd.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 1997-2009 Erez Zadok
   5  * Copyright (c) 1990 Jan-Simon Pendry
   6  * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
   7  * Copyright (c) 1990 The Regents of the University of California.
   8  * All rights reserved.
   9  *
  10  * This code is derived from software contributed to Berkeley by
  11  * Jan-Simon Pendry at Imperial College, London.
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  * 1. Redistributions of source code must retain the above copyright
  17  *    notice, this list of conditions and the following disclaimer.
  18  * 2. Redistributions in binary form must reproduce the above copyright
  19  *    notice, this list of conditions and the following disclaimer in the
  20  *    documentation and/or other materials provided with the distribution.
  21  * 3. All advertising materials mentioning features or use of this software
  22  *    must display the following acknowledgment:
  23  *      This product includes software developed by the University of
  24  *      California, Berkeley and its contributors.
  25  * 4. Neither the name of the University nor the names of its contributors
  26  *    may be used to endorse or promote products derived from this software
  27  *    without specific prior written permission.
  28  *
  29  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  30  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  31  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  32  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  33  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  34  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  35  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  37  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  38  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  39  * SUCH DAMAGE.
  40  *
  41  *
  42  * File: am-utils/conf/mtab/mtab_bsd.c
  43  *
  44  */
  45
  46 /*
  47  * BSD 4.4 systems don't write their mount tables on a file.  Instead, they
  48  * use a (better) system where the kernel keeps this state, and you access
  49  * the mount tables via a known interface.
  50  */
  51
  52 #ifdef HAVE_CONFIG_H
  53 # include <config.h>
  54 #endif /* HAVE_CONFIG_H */
  55 #include <am_defs.h>
  56 #include <amu.h>
  57
  58 #if __NetBSD_Version__ > 200030000
  59 #define statfs statvfs
  60 #endif
  61
  62 static mntent_t *
  63 mnt_dup(struct statfs *mp)
  64 {
  65   mntent_t *new_mp = ALLOC(mntent_t);
  66   char *ty;
  67
  68   new_mp->mnt_fsname = strdup(mp->f_mntfromname);
  69   new_mp->mnt_dir = strdup(mp->f_mntonname);
  70
  71 #ifdef HAVE_STRUCT_STATFS_F_FSTYPENAME
  72   ty = mp->f_fstypename;
  73 #else /* not HAVE_STRUCT_STATFS_F_FSTYPENAME */
  74   switch (mp->f_type) {
  75
  76 # if defined(MOUNT_UFS) && defined(MNTTAB_TYPE_UFS)
  77   case MOUNT_UFS:
  78     ty = MNTTAB_TYPE_UFS;
  79     break;
  80 # endif /* defined(MOUNT_UFS) && defined(MNTTAB_TYPE_UFS) */
  81
  82 # if defined(MOUNT_NFS) && defined(MNTTAB_TYPE_NFS)
  83   case MOUNT_NFS:
  84     ty = MNTTAB_TYPE_NFS;
  85     break;
  86 # endif /* defined(MOUNT_NFS) && defined(MNTTAB_TYPE_NFS) */
  87
  88 # if defined(MOUNT_MFS) && defined(MNTTAB_TYPE_MFS)
  89   case MOUNT_MFS:
  90     ty = MNTTAB_TYPE_MFS;
  91     break;
  92 # endif /* defined(MOUNT_MFS) && defined(MNTTAB_TYPE_MFS) */
  93
  94   default:
  95     ty = "unknown";
  96
  97     break;
  98   }
  99 #endif /* not HAVE_STRUCT_STATFS_F_FSTYPENAME */
 100
 101   new_mp->mnt_type = strdup(ty);
 102   new_mp->mnt_opts = strdup("unset");
 103   new_mp->mnt_freq = 0;
 104   new_mp->mnt_passno = 0;
 105
 106   return new_mp;
 107 }
 108
 109
 110 /*
 111  * Read a mount table into memory
 112  */
 113 mntlist *
 114 read_mtab(char *fs, const char *mnttabname)
 115 {
 116   mntlist **mpp, *mhp;
 117   struct statfs *mntbufp, *mntp;
 118
 119   int nloc = getmntinfo(&mntbufp, MNT_NOWAIT);
 120
 121   if (nloc == 0) {
 122     plog(XLOG_ERROR, "Can't read mount table");
 123     return 0;
 124   }
 125   mpp = &mhp;
 126   for (mntp = mntbufp; mntp < mntbufp + nloc; mntp++) {
 127     /*
 128      * Allocate a new slot
 129      */
 130     *mpp = ALLOC(struct mntlist);
 131
 132     /*
 133      * Copy the data returned by getmntent
 134      */
 135     (*mpp)->mnt = mnt_dup(mntp);
 136
 137     /*
 138      * Move to next pointer
 139      */
 140     mpp = &(*mpp)->mnext;
 141   }
 142
 143   /*
 144    * Terminate the list
 145    */
 146   *mpp = NULL;
 147
 148   return mhp;
 149 }