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/umount/umount_bsd44.c
37 *
38 */
39
40 /*
41 * Unmounting filesystems under BSD 4.4.
42 */
43
44 #ifdef HAVE_CONFIG_H
45 # include <config.h>
46 #endif /* HAVE_CONFIG_H */
47 #include <am_defs.h>
48 #include <amu.h>
49
50
51 int
umount_fs(char * mntdir,const char * mnttabname,u_int unmount_flags)52 umount_fs(char *mntdir, const char *mnttabname, u_int unmount_flags)
53 {
54 int error;
55
56 eintr:
57 error = unmount(mntdir, 0);
58 if (error < 0)
59 error = errno;
60
61 switch (error) {
62 case EINVAL:
63 case ENOTBLK:
64 case ENOENT:
65 plog(XLOG_WARNING, "unmount: %s is not mounted", mntdir);
66 error = 0; /* Not really an error */
67 break;
68
69 case EINTR:
70 /* not sure why this happens, but it does. ask kirk one day... */
71 dlog("%s: unmount: %m", mntdir);
72 goto eintr;
73
74 #ifdef MNT2_GEN_OPT_FORCE
75 case EBUSY:
76 case EIO:
77 case ESTALE:
78 /* caller determines if forced unmounts should be used */
79 if (unmount_flags & AMU_UMOUNT_FORCE) {
80 error = umount2_fs(mntdir, unmount_flags);
81 if (error < 0)
82 error = errno;
83 else
84 return error;
85 }
86 /* fallthrough */
87 #endif /* MNT2_GEN_OPT_FORCE */
88
89 default:
90 dlog("%s: unmount: %m", mntdir);
91 break;
92 }
93
94 return error;
95 }
96
97
98 #ifdef MNT2_GEN_OPT_FORCE
99 /* force unmount, no questions asked, without touching mnttab file */
100 int
umount2_fs(const char * mntdir,u_int unmount_flags)101 umount2_fs(const char *mntdir, u_int unmount_flags)
102 {
103 int error = 0;
104
105 if (unmount_flags & AMU_UMOUNT_FORCE) {
106 plog(XLOG_INFO, "umount2_fs: trying unmount/forced on %s", mntdir);
107 error = unmount(mntdir, MNT2_GEN_OPT_FORCE);
108 if (error < 0 && (errno == EINVAL || errno == ENOENT))
109 error = 0; /* ignore EINVAL/ENOENT */
110 if (error < 0)
111 plog(XLOG_WARNING, "%s: unmount/force: %m", mntdir);
112 else
113 dlog("%s: unmount/force: OK", mntdir);
114 }
115 return error;
116 }
117 #endif /* MNT2_GEN_OPT_FORCE */
118