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authorEric Andersen <andersen@codepoet.org>1999-10-09 00:25:00 +0000
committerEric Andersen <andersen@codepoet.org>1999-10-09 00:25:00 +0000
commitf811e07b072600a3784a92e5a1dc8a93dac477eb (patch)
tree820c6366f8bdacf617a9591cc2ca9dfe107b1fa3 /umount.c
parent8341a1565306a54e685455d19efb0516ad3328a1 (diff)
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More stuff.
Diffstat (limited to 'umount.c')
-rw-r--r--umount.c196
1 files changed, 78 insertions, 118 deletions
diff --git a/umount.c b/umount.c
index 4efc9f9d9..5274e2f6f 100644
--- a/umount.c
+++ b/umount.c
@@ -1,135 +1,95 @@
1/*
2 * Mini umount implementation for busybox
3 *
4 * Copyright (C) 1998 by Erik Andersen <andersee@debian.org>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
1#include "internal.h" 22#include "internal.h"
2#include <stdlib.h>
3#include <unistd.h>
4#include <errno.h>
5#include <string.h>
6#include <stdio.h> 23#include <stdio.h>
7#include <mntent.h>
8#include <sys/mount.h> 24#include <sys/mount.h>
25#include <mntent.h>
26#include <fstab.h>
27#include <errno.h>
9 28
10const char umount_usage[] = "umount {filesystem|directory}\n" 29const char umount_usage[] = "\tumount {filesystem|directory}\n"
11"\tumount -a\n" 30"or to unmount all mounted file systems:\n\tumount -a\n";
12"\n"
13"\tUnmount a filesystem.\n"
14"\t-a:\tUnmounts all mounted filesystems.\n";
15
16static char *
17stralloc(const char * string)
18{
19 int length = strlen(string) + 1;
20 char * n = malloc(length);
21 memcpy(n, string, length);
22 return n;
23}
24
25extern void
26erase_mtab(const char * name)
27{
28 struct mntent entries[100];
29 int count = 0;
30 FILE * mountTable = setmntent("/etc/mtab", "r");
31 struct mntent * m;
32
33 if ( mountTable == 0
34 && (mountTable = setmntent("/proc/mounts", "r")) == 0 ) {
35 name_and_error("/etc/mtab");
36 return;
37 }
38
39 while ( (m = getmntent(mountTable)) != 0 ) {
40 entries[count].mnt_fsname = stralloc(m->mnt_fsname);
41 entries[count].mnt_dir = stralloc(m->mnt_dir);
42 entries[count].mnt_type = stralloc(m->mnt_type);
43 entries[count].mnt_opts = stralloc(m->mnt_opts);
44 entries[count].mnt_freq = m->mnt_freq;
45 entries[count].mnt_passno = m->mnt_passno;
46 count++;
47 }
48 endmntent(mountTable);
49 if ( (mountTable = setmntent("/etc/mtab", "w")) ) {
50 int i;
51 for ( i = 0; i < count; i++ ) {
52 int result = ( strcmp(entries[i].mnt_fsname, name) == 0
53 || strcmp(entries[i].mnt_dir, name) == 0 );
54
55 if ( result )
56 continue;
57 else
58 addmntent(mountTable, &entries[i]);
59 }
60 endmntent(mountTable);
61 }
62 else if ( errno != EROFS )
63 name_and_error("/etc/mtab");
64}
65 31
66static int 32static int
67umount_all(int noMtab) 33umount_all()
68{ 34{
69 struct mntent entries[100]; 35 int status;
70 int count = 0; 36 struct mntent *m;
71 FILE * mountTable = setmntent("/etc/mtab", "r"); 37 FILE *mountTable;
72 struct mntent * m;
73 int status = 0;
74
75 if ( mountTable == 0
76 && (mountTable = setmntent("/proc/mounts", "r")) == 0 ) {
77 name_and_error("/etc/mtab");
78 return 1;
79 }
80 38
81 while ( (m = getmntent(mountTable)) != 0 ) { 39 if ((mountTable = setmntent ("/proc/mounts", "r"))) {
82 entries[count].mnt_fsname = stralloc(m->mnt_fsname); 40 while ((m = getmntent (mountTable)) != 0) {
83 count++; 41 char *blockDevice = m->mnt_fsname;
84 } 42 if (strcmp (blockDevice, "/dev/root") == 0)
85 endmntent(mountTable); 43 blockDevice = (getfsfile ("/"))->fs_spec;
86 44 status=umount (m->mnt_dir);
87 while ( count > 0 ) { 45 if (status!=0) {
88 int result = umount(entries[--count].mnt_fsname) == 0; 46 /* Don't bother retrying the umount on busy devices */
89 /* free(entries[count].mnt_fsname); */ 47 if (errno==EBUSY) {
90 if ( result ) { 48 perror(m->mnt_dir);
91 if ( !noMtab ) 49 continue;
92 erase_mtab(entries[count].mnt_fsname); 50 }
51 printf ("Trying to umount %s failed: %s\n",
52 m->mnt_dir, strerror(errno));
53 printf ("Instead trying to umount %s\n", blockDevice);
54 status=umount (blockDevice);
55 if (status!=0) {
56 printf ("Couldn't umount %s on %s (type %s): %s\n",
57 blockDevice, m->mnt_dir, m->mnt_type, strerror(errno));
58 }
93 } 59 }
94 else { 60 }
95 status = 1; 61 endmntent (mountTable);
96 name_and_error(entries[count].mnt_fsname); 62 }
97 } 63 return( TRUE);
98 }
99 return status;
100} 64}
101 65
102extern int 66extern int
103do_umount(const char * name, int noMtab) 67umount_main(int argc, char * * argv)
104{ 68{
105 if ( umount(name) == 0 ) {
106 if ( !noMtab )
107 erase_mtab(name);
108 return 0;
109 }
110 return 1;
111}
112 69
113extern int 70 if (argc < 2) {
114umount_main(struct FileInfo * i, int argc, char * * argv) 71 fprintf(stderr, "Usage: %s", umount_usage);
115{ 72 return(FALSE);
116 int noMtab = 0; 73 }
74 argc--;
75 argv++;
117 76
118 if ( argv[1][0] == '-' ) { 77 /* Parse any options */
119 switch ( argv[1][1] ) { 78 while (**argv == '-') {
120 case 'a': 79 while (*++(*argv)) switch (**argv) {
121 return umount_all(noMtab); 80 case 'a':
122 case 'n': 81 return umount_all();
123 noMtab = 1; 82 break;
124 break; 83 default:
125 default: 84 fprintf(stderr, "Usage: %s\n", umount_usage);
126 usage(umount_usage); 85 exit( FALSE);
127 return 1;
128 }
129 }
130 if ( do_umount(argv[1],noMtab) != 0 ) {
131 fprintf(stderr, "%s: %s.\n", argv[1], strerror(errno));
132 return 1;
133 } 86 }
134 return 0; 87 }
88 if ( umount(*argv) == 0 )
89 return (TRUE);
90 else {
91 perror("umount");
92 return( FALSE);
93 }
135} 94}
95
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