1/*
2 * Copyright (c) 1997-2006 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 *
40 * File: am-utils/conf/umount/umount_bsd44.c
41 *
42 */
43
44/*
45 * Unmounting filesystems under BSD 4.4.
46 */
47
48#ifdef HAVE_CONFIG_H
49# include <config.h>
50#endif /* HAVE_CONFIG_H */
51#include <am_defs.h>
52#include <amu.h>
53
54
55int
56umount_fs(char *mntdir, const char *mnttabname, u_int unmount_flags)
57{
58  int error;
59
60eintr:
61  error = unmount(mntdir, 0);
62  if (error < 0)
63    error = errno;
64
65  switch (error) {
66  case EINVAL:
67  case ENOTBLK:
68  case ENOENT:
69    plog(XLOG_WARNING, "unmount: %s is not mounted", mntdir);
70    error = 0;			/* Not really an error */
71    break;
72
73  case EINTR:
74    /* not sure why this happens, but it does.  ask kirk one day... */
75    dlog("%s: unmount: %m", mntdir);
76    goto eintr;
77
78#ifdef MNT2_GEN_OPT_FORCE
79  case EBUSY:
80  case EIO:
81  case ESTALE:
82    /* caller determines if forced unmounts should be used */
83    if (unmount_flags & AMU_UMOUNT_FORCE) {
84      error = umount2_fs(mntdir, unmount_flags);
85      if (error < 0)
86	error = errno;
87      else
88	return error;
89    }
90    /* fallthrough */
91#endif /* MNT2_GEN_OPT_FORCE */
92
93  default:
94    dlog("%s: unmount: %m", mntdir);
95    break;
96  }
97
98  return error;
99}
100
101
102#ifdef MNT2_GEN_OPT_FORCE
103/* force unmount, no questions asked, without touching mnttab file */
104int
105umount2_fs(const char *mntdir, u_int unmount_flags)
106{
107  int error = 0;
108  if (unmount_flags & AMU_UMOUNT_FORCE) {
109    plog(XLOG_INFO, "umount2_fs: trying unmount/forced on %s", mntdir);
110    error = unmount(mntdir, MNT2_GEN_OPT_FORCE);
111    if (error < 0 && (errno == EINVAL || errno == ENOENT))
112      error = 0;		/* ignore EINVAL/ENOENT */
113    if (error < 0)
114      plog(XLOG_WARNING, "%s: unmount/force: %m", mntdir);
115    else
116      dlog("%s: unmount/force: OK", mntdir);
117  }
118  return error;
119}
120#endif /* MNT2_GEN_OPT_FORCE */
121