src/util/fstab.c

   1 /*-
   2  * Copyright (c) 1980, 1989, 1993
   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  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #include <afsconfig.h>
  31 #include <afs/param.h>
  32
  33 #include <roken.h>
  34
  35 #if defined(AFS_DARWIN_ENV)
  36 /*
  37  * Reworked from FreeBSD umount
  38  */
  39
  40 #include <sys/mount.h>
  41 #include <fstab.h>
  42
  43 size_t
  44 mntinfo(struct statfs **mntbuffer)
  45 {
  46     static struct statfs *origbuf;
  47     size_t bufsize;
  48     int mntsize;
  49
  50     mntsize = getfsstat(NULL, 0, MNT_NOWAIT);
  51     if (mntsize <= 0)
  52         return (0);
  53     bufsize = (mntsize + 1) * sizeof(struct statfs);
  54     if ((origbuf = malloc(bufsize)) == NULL)
  55         err(1, "malloc");
  56     mntsize = getfsstat(origbuf, (long)bufsize, MNT_NOWAIT);
  57     *mntbuffer = origbuf;
  58     return (mntsize);
  59 }
  60
  61 static struct statfs *mntbuf = NULL;
  62 static struct statfs *mntent;
  63 static int mntcnt;
  64 static struct fstab fstabent;
  65
  66 struct fstab *
  67 getfsent(void)
  68 {
  69     if (((!mntbuf) && !setfsent()) || mntcnt == 0)
  70         return (NULL);
  71     fstabent.fs_file = mntent->f_mntonname;
  72     fstabent.fs_freq = fstabent.fs_passno = 0;
  73     fstabent.fs_mntops = mntent->f_fstypename;
  74     fstabent.fs_spec = mntent->f_mntfromname;
  75     if (mntent->f_flags & MNT_RDONLY)
  76         fstabent.fs_type = FSTAB_RO;
  77     else
  78         fstabent.fs_type = FSTAB_RW;
  79     fstabent.fs_vfstype = mntent->f_fstypename;
  80
  81     mntent++;
  82     mntcnt--;
  83     return &fstabent;
  84 }
  85
  86 int
  87 setfsent(void)
  88 {
  89     if (mntbuf)
  90         free(mntbuf);
  91     mntbuf = NULL;
  92     mntent = 0;
  93     if ((mntcnt = mntinfo(&mntbuf)) <= 0) {
  94         err(1, "setfsent");
  95         return 0;
  96     }
  97     mntent = mntbuf;
  98     return 1;
  99 }
 100
 101 void
 102 endfsent(void)
 103 {
 104     if (mntbuf)
 105         free(mntbuf);
 106     mntbuf = NULL;
 107     mntent = 0;
 108     mntcnt = 0;
 109 }
 110 #endif