mtab_bsd.c revision 310490 
1/*
2 * Copyright (c) 1997-2014 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. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 *
36 * File: am-utils/conf/mtab/mtab_bsd.c
37 *
38 */
39
40/*
41 * BSD 4.4 systems don't write their mount tables on a file.  Instead, they
42 * use a (better) system where the kernel keeps this state, and you access
43 * the mount tables via a known interface.
44 */
45
46#ifdef HAVE_CONFIG_H
47# include <config.h>
48#endif /* HAVE_CONFIG_H */
49#include <am_defs.h>
50#include <amu.h>
51
52#if __NetBSD_Version__ > 200030000
53#define statfs statvfs
54#endif
55
56static mntent_t *
57mnt_dup(struct statfs *mp)
58{
59  mntent_t *new_mp = ALLOC(mntent_t);
60  char *ty;
61
62  new_mp->mnt_fsname = xstrdup(mp->f_mntfromname);
63  new_mp->mnt_dir = xstrdup(mp->f_mntonname);
64
65#ifdef HAVE_STRUCT_STATFS_F_FSTYPENAME
66  ty = mp->f_fstypename;
67#else /* not HAVE_STRUCT_STATFS_F_FSTYPENAME */
68  switch (mp->f_type) {
69
70# if defined(MOUNT_UFS) && defined(MNTTAB_TYPE_UFS)
71  case MOUNT_UFS:
72    ty = MNTTAB_TYPE_UFS;
73    break;
74# endif /* defined(MOUNT_UFS) && defined(MNTTAB_TYPE_UFS) */
75
76# if defined(MOUNT_NFS) && defined(MNTTAB_TYPE_NFS)
77  case MOUNT_NFS:
78    ty = MNTTAB_TYPE_NFS;
79    break;
80# endif /* defined(MOUNT_NFS) && defined(MNTTAB_TYPE_NFS) */
81
82# if defined(MOUNT_MFS) && defined(MNTTAB_TYPE_MFS)
83  case MOUNT_MFS:
84    ty = MNTTAB_TYPE_MFS;
85    break;
86# endif /* defined(MOUNT_MFS) && defined(MNTTAB_TYPE_MFS) */
87
88  default:
89    ty = "unknown";
90
91    break;
92  }
93#endif /* not HAVE_STRUCT_STATFS_F_FSTYPENAME */
94
95  new_mp->mnt_type = xstrdup(ty);
96  new_mp->mnt_opts = xstrdup("unset");
97  new_mp->mnt_freq = 0;
98  new_mp->mnt_passno = 0;
99
100  return new_mp;
101}
102
103
104/*
105 * Read a mount table into memory
106 */
107mntlist *
108read_mtab(char *fs, const char *mnttabname)
109{
110  mntlist **mpp, *mhp;
111  struct statfs *mntbufp, *mntp;
112
113  int nloc = getmntinfo(&mntbufp, MNT_NOWAIT);
114
115  if (nloc == 0) {
116    plog(XLOG_ERROR, "Can't read mount table");
117    return 0;
118  }
119  mpp = &mhp;
120  for (mntp = mntbufp; mntp < mntbufp + nloc; mntp++) {
121    /*
122     * Allocate a new slot
123     */
124    *mpp = ALLOC(struct mntlist);
125
126    /*
127     * Copy the data returned by getmntent
128     */
129    (*mpp)->mnt = mnt_dup(mntp);
130
131    /*
132     * Move to next pointer
133     */
134    mpp = &(*mpp)->mnext;
135  }
136
137  /*
138   * Terminate the list
139   */
140  *mpp = NULL;
141
142  return mhp;
143}
144