mtab_bsd.c revision 51292 
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 * 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_bsd.c,v 1.2 1999/01/10 21:54:11 ezk Exp $
42 *
43 */
44
45/*
46 * BSD 4.4 systems don't write their mount tables on a file.  Instead, they
47 * use a (better) system where the kernel keeps this state, and you access
48 * the mount tables via a known interface.
49 */
50
51#ifdef HAVE_CONFIG_H
52# include <config.h>
53#endif /* HAVE_CONFIG_H */
54#include <am_defs.h>
55#include <amu.h>
56
57
58static mntent_t *
59mnt_dup(struct statfs *mp)
60{
61  mntent_t *new_mp = ALLOC(mntent_t);
62  char *ty;
63
64  new_mp->mnt_fsname = strdup(mp->f_mntfromname);
65  new_mp->mnt_dir = strdup(mp->f_mntonname);
66
67#ifdef HAVE_FIELD_STRUCT_STATFS_F_FSTYPENAME
68  ty = mp->f_fstypename;
69#else /* not HAVE_FIELD_STRUCT_STATFS_F_FSTYPENAME */
70  switch (mp->f_type) {
71
72# if defined(MOUNT_UFS) && defined(MNTTAB_TYPE_UFS)
73  case MOUNT_UFS:
74    ty = MNTTAB_TYPE_UFS;
75    break;
76# endif /* defined(MOUNT_UFS) && defined(MNTTAB_TYPE_UFS) */
77
78# if defined(MOUNT_NFS) && defined(MNTTAB_TYPE_NFS)
79  case MOUNT_NFS:
80    ty = MNTTAB_TYPE_NFS;
81    break;
82# endif /* defined(MOUNT_NFS) && defined(MNTTAB_TYPE_NFS) */
83
84# if defined(MOUNT_MFS) && defined(MNTTAB_TYPE_MFS)
85  case MOUNT_MFS:
86    ty = MNTTAB_TYPE_MFS;
87    break;
88# endif /* defined(MOUNT_MFS) && defined(MNTTAB_TYPE_MFS) */
89
90  default:
91    ty = "unknown";
92
93    break;
94  }
95#endif /* not HAVE_FIELD_STRUCT_STATFS_F_FSTYPENAME */
96
97  new_mp->mnt_type = strdup(ty);
98  new_mp->mnt_opts = strdup("unset");
99  new_mp->mnt_freq = 0;
100  new_mp->mnt_passno = 0;
101
102  return new_mp;
103}
104
105
106/*
107 * Read a mount table into memory
108 */
109mntlist *
110read_mtab(char *fs, const char *mnttabname)
111{
112  mntlist **mpp, *mhp;
113  struct statfs *mntbufp, *mntp;
114
115  int nloc = getmntinfo(&mntbufp, MNT_NOWAIT);
116
117  if (nloc == 0) {
118    plog(XLOG_ERROR, "Can't read mount table");
119    return 0;
120  }
121  mpp = &mhp;
122  for (mntp = mntbufp; mntp < mntbufp + nloc; mntp++) {
123    /*
124     * Allocate a new slot
125     */
126    *mpp = ALLOC(struct mntlist);
127
128    /*
129     * Copy the data returned by getmntent
130     */
131    (*mpp)->mnt = mnt_dup(mntp);
132
133    /*
134     * Move to next pointer
135     */
136    mpp = &(*mpp)->mnext;
137  }
138
139  /*
140   * Terminate the list
141   */
142  *mpp = 0;
143
144  return mhp;
145}
146