diff options
Diffstat (limited to 'busybox/libbb/mtab.c')
-rw-r--r-- | busybox/libbb/mtab.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/busybox/libbb/mtab.c b/busybox/libbb/mtab.c new file mode 100644 index 000000000..b1f74c476 --- /dev/null +++ b/busybox/libbb/mtab.c | |||
@@ -0,0 +1,116 @@ | |||
1 | /* vi: set sw=4 ts=4: */ | ||
2 | /* | ||
3 | * Utility routines. | ||
4 | * | ||
5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> | ||
6 | * | ||
7 | * This program is free software; you can redistribute it and/or modify | ||
8 | * it under the terms of the GNU General Public License as published by | ||
9 | * the Free Software Foundation; either version 2 of the License, or | ||
10 | * (at your option) any later version. | ||
11 | * | ||
12 | * This program is distributed in the hope that it will be useful, | ||
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
15 | * General Public License for more details. | ||
16 | * | ||
17 | * You should have received a copy of the GNU General Public License | ||
18 | * along with this program; if not, write to the Free Software | ||
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
20 | */ | ||
21 | |||
22 | #include <stdlib.h> | ||
23 | #include <unistd.h> | ||
24 | #include <errno.h> | ||
25 | #include <string.h> | ||
26 | #include <stdio.h> | ||
27 | #include <mntent.h> | ||
28 | #include "libbb.h" | ||
29 | |||
30 | #define MTAB_MAX_ENTRIES 40 | ||
31 | static const int MS_RDONLY = 1; /* Mount read-only. */ | ||
32 | |||
33 | void erase_mtab(const char *name) | ||
34 | { | ||
35 | struct mntent entries[MTAB_MAX_ENTRIES]; | ||
36 | int count = 0; | ||
37 | FILE *mountTable = setmntent(bb_path_mtab_file, "r"); | ||
38 | struct mntent *m; | ||
39 | |||
40 | /* Check if reading the mtab file failed */ | ||
41 | if (mountTable == 0 | ||
42 | /* Bummer. fall back on trying the /proc filesystem */ | ||
43 | && (mountTable = setmntent("/proc/mounts", "r")) == 0) { | ||
44 | bb_perror_msg(bb_path_mtab_file); | ||
45 | return; | ||
46 | } | ||
47 | |||
48 | while (((m = getmntent(mountTable)) != 0) && (count < MTAB_MAX_ENTRIES)) | ||
49 | { | ||
50 | entries[count].mnt_fsname = strdup(m->mnt_fsname); | ||
51 | entries[count].mnt_dir = strdup(m->mnt_dir); | ||
52 | entries[count].mnt_type = strdup(m->mnt_type); | ||
53 | entries[count].mnt_opts = strdup(m->mnt_opts); | ||
54 | entries[count].mnt_freq = m->mnt_freq; | ||
55 | entries[count].mnt_passno = m->mnt_passno; | ||
56 | count++; | ||
57 | } | ||
58 | endmntent(mountTable); | ||
59 | if ((mountTable = setmntent(bb_path_mtab_file, "w"))) { | ||
60 | int i; | ||
61 | |||
62 | for (i = 0; i < count; i++) { | ||
63 | int result = (strcmp(entries[i].mnt_fsname, name) == 0 | ||
64 | || strcmp(entries[i].mnt_dir, name) == 0); | ||
65 | |||
66 | if (result) | ||
67 | continue; | ||
68 | else | ||
69 | addmntent(mountTable, &entries[i]); | ||
70 | } | ||
71 | endmntent(mountTable); | ||
72 | } else if (errno != EROFS) | ||
73 | bb_perror_msg(bb_path_mtab_file); | ||
74 | } | ||
75 | |||
76 | void write_mtab(char *blockDevice, char *directory, | ||
77 | char *filesystemType, long flags, char *string_flags) | ||
78 | { | ||
79 | FILE *mountTable = setmntent(bb_path_mtab_file, "a+"); | ||
80 | struct mntent m; | ||
81 | |||
82 | if (mountTable == 0) { | ||
83 | bb_perror_msg(bb_path_mtab_file); | ||
84 | return; | ||
85 | } | ||
86 | if (mountTable) { | ||
87 | int length = strlen(directory); | ||
88 | |||
89 | if (length > 1 && directory[length - 1] == '/') | ||
90 | directory[length - 1] = '\0'; | ||
91 | |||
92 | if (filesystemType == 0) { | ||
93 | struct mntent *p = find_mount_point(blockDevice, "/proc/mounts"); | ||
94 | |||
95 | if (p && p->mnt_type) | ||
96 | filesystemType = p->mnt_type; | ||
97 | } | ||
98 | m.mnt_fsname = blockDevice; | ||
99 | m.mnt_dir = directory; | ||
100 | m.mnt_type = filesystemType ? filesystemType : "default"; | ||
101 | |||
102 | if (*string_flags) { | ||
103 | m.mnt_opts = string_flags; | ||
104 | } else { | ||
105 | if ((flags | MS_RDONLY) == flags) | ||
106 | m.mnt_opts = "ro"; | ||
107 | else | ||
108 | m.mnt_opts = "rw"; | ||
109 | } | ||
110 | |||
111 | m.mnt_freq = 0; | ||
112 | m.mnt_passno = 0; | ||
113 | addmntent(mountTable, &m); | ||
114 | endmntent(mountTable); | ||
115 | } | ||
116 | } | ||