Contents of /trunk/mkinitrd-magellan/busybox/miscutils/mountpoint.c
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Sat Sep 1 22:45:15 2007 UTC (16 years, 8 months ago) by niro
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File size: 1471 byte(s)
Sat Sep 1 22:45:15 2007 UTC (16 years, 8 months ago) by niro
File MIME type: text/plain
File size: 1471 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 | * mountpoint implementation for busybox |
4 | * |
5 | * Copyright (C) 2005 Bernhard Fischer |
6 | * |
7 | * Licensed under the GPL v2 or later, see the file LICENSE in this tarball. |
8 | * |
9 | * Based on sysvinit's mountpoint |
10 | */ |
11 | |
12 | #include "busybox.h" |
13 | |
14 | int mountpoint_main(int argc, char **argv) |
15 | { |
16 | struct stat st; |
17 | char *arg; |
18 | int opt = getopt32(argc, argv, "qdx"); |
19 | #define OPT_q (1) |
20 | #define OPT_d (2) |
21 | #define OPT_x (4) |
22 | |
23 | if (optind != argc - 1) |
24 | bb_show_usage(); |
25 | |
26 | arg = argv[optind]; |
27 | |
28 | if ( (opt & OPT_x && stat(arg, &st) == 0) || (lstat(arg, &st) == 0) ) { |
29 | if (opt & OPT_x) { |
30 | if (S_ISBLK(st.st_mode)) { |
31 | printf("%u:%u\n", major(st.st_rdev), |
32 | minor(st.st_rdev)); |
33 | return EXIT_SUCCESS; |
34 | } else { |
35 | if (opt & OPT_q) |
36 | putchar('\n'); |
37 | else |
38 | bb_error_msg("%s: not a block device", arg); |
39 | } |
40 | return EXIT_FAILURE; |
41 | } else |
42 | if (S_ISDIR(st.st_mode)) { |
43 | dev_t st_dev = st.st_dev; |
44 | ino_t st_ino = st.st_ino; |
45 | char *p = xasprintf("%s/..", arg); |
46 | |
47 | if (stat(p, &st) == 0) { |
48 | int ret = (st_dev != st.st_dev) || |
49 | (st_dev == st.st_dev && st_ino == st.st_ino); |
50 | if (opt & OPT_d) |
51 | printf("%u:%u\n", major(st_dev), minor(st_dev)); |
52 | else if (!(opt & OPT_q)) |
53 | printf("%s is %sa mountpoint\n", arg, ret?"":"not "); |
54 | return !ret; |
55 | } |
56 | } else { |
57 | if (!(opt & OPT_q)) |
58 | bb_error_msg("%s: not a directory", arg); |
59 | return EXIT_FAILURE; |
60 | } |
61 | } |
62 | if (!(opt & OPT_q)) |
63 | bb_perror_msg("%s", arg); |
64 | return EXIT_FAILURE; |
65 | } |