Contents of /trunk/mkinitrd-magellan/busybox/libbb/find_mount_point.c
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
File MIME type: text/plain
File size: 1287 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
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 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
8 | */ |
9 | |
10 | #include "libbb.h" |
11 | #include <mntent.h> |
12 | |
13 | /* |
14 | * Given a block device, find the mount table entry if that block device |
15 | * is mounted. |
16 | * |
17 | * Given any other file (or directory), find the mount table entry for its |
18 | * filesystem. |
19 | */ |
20 | struct mntent *find_mount_point(const char *name, const char *table) |
21 | { |
22 | struct stat s; |
23 | dev_t mountDevice; |
24 | FILE *mountTable; |
25 | struct mntent *mountEntry; |
26 | |
27 | if (stat(name, &s) != 0) |
28 | return 0; |
29 | |
30 | if ((s.st_mode & S_IFMT) == S_IFBLK) |
31 | mountDevice = s.st_rdev; |
32 | else |
33 | mountDevice = s.st_dev; |
34 | |
35 | |
36 | mountTable = setmntent(table ? table : bb_path_mtab_file, "r"); |
37 | if (!mountTable) |
38 | return 0; |
39 | |
40 | while ((mountEntry = getmntent(mountTable)) != 0) { |
41 | if (strcmp(name, mountEntry->mnt_dir) == 0 |
42 | || strcmp(name, mountEntry->mnt_fsname) == 0 |
43 | ) { /* String match. */ |
44 | break; |
45 | } |
46 | if (stat(mountEntry->mnt_fsname, &s) == 0 && s.st_rdev == mountDevice) /* Match the device. */ |
47 | break; |
48 | if (stat(mountEntry->mnt_dir, &s) == 0 && s.st_dev == mountDevice) /* Match the directory's mount point. */ |
49 | break; |
50 | } |
51 | endmntent(mountTable); |
52 | return mountEntry; |
53 | } |