xref: /netbsd-src/external/bsd/am-utils/dist/conf/umount/umount_bsd44.c (revision 8bae5d409deb915cf7c8f0539fae22ff2cb8a313)
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