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
55 int
umount_fs(char * mntdir,const char * mnttabname,u_int unmount_flags)56 umount_fs(char *mntdir, const char *mnttabname, u_int unmount_flags)
57 {
58 int error;
59
60 eintr:
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 */
104 int
umount2_fs(const char * mntdir,u_int unmount_flags)105 umount2_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