1 /* $NetBSD: umount_bsd44.c,v 1.1.1.3 2015/01/17 16:34:16 christos Exp $ */
2
3 /*
4 * Copyright (c) 1997-2014 Erez Zadok
5 * Copyright (c) 1990 Jan-Simon Pendry
6 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
7 * Copyright (c) 1990 The Regents of the University of California.
8 * All rights reserved.
9 *
10 * This code is derived from software contributed to Berkeley by
11 * Jan-Simon Pendry at Imperial College, London.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 *
38 * File: am-utils/conf/umount/umount_bsd44.c
39 *
40 */
41
42 /*
43 * Unmounting filesystems under BSD 4.4.
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
53 int
umount_fs(char * mntdir,const char * mnttabname,u_int unmount_flags)54 umount_fs(char *mntdir, const char *mnttabname, u_int unmount_flags)
55 {
56 int error;
57
58 eintr:
59 error = unmount(mntdir, 0);
60 if (error < 0)
61 error = errno;
62
63 switch (error) {
64 case EINVAL:
65 case ENOTBLK:
66 case ENOENT:
67 plog(XLOG_WARNING, "unmount: %s is not mounted", mntdir);
68 error = 0; /* Not really an error */
69 break;
70
71 case EINTR:
72 /* not sure why this happens, but it does. ask kirk one day... */
73 dlog("%s: unmount: %m", mntdir);
74 goto eintr;
75
76 #ifdef MNT2_GEN_OPT_FORCE
77 case EBUSY:
78 case EIO:
79 case ESTALE:
80 /* caller determines if forced unmounts should be used */
81 if (unmount_flags & AMU_UMOUNT_FORCE) {
82 error = umount2_fs(mntdir, unmount_flags);
83 if (error < 0)
84 error = errno;
85 else
86 return error;
87 }
88 /* fallthrough */
89 #endif /* MNT2_GEN_OPT_FORCE */
90
91 default:
92 dlog("%s: unmount: %m", mntdir);
93 break;
94 }
95
96 return error;
97 }
98
99
100 #ifdef MNT2_GEN_OPT_FORCE
101 /* force unmount, no questions asked, without touching mnttab file */
102 int
umount2_fs(const char * mntdir,u_int unmount_flags)103 umount2_fs(const char *mntdir, u_int unmount_flags)
104 {
105 int error = 0;
106
107 if (unmount_flags & AMU_UMOUNT_FORCE) {
108 plog(XLOG_INFO, "umount2_fs: trying unmount/forced on %s", mntdir);
109 error = unmount(mntdir, MNT2_GEN_OPT_FORCE);
110 if (error < 0 && (errno == EINVAL || errno == ENOENT))
111 error = 0; /* ignore EINVAL/ENOENT */
112 if (error < 0)
113 plog(XLOG_WARNING, "%s: unmount/force: %m", mntdir);
114 else
115 dlog("%s: unmount/force: OK", mntdir);
116 }
117 return error;
118 }
119 #endif /* MNT2_GEN_OPT_FORCE */
120