Contents of /tags/mkinitrd-6_1_9/busybox/miscutils/mountpoint.c
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Wed Oct 28 00:26:51 2009 UTC (14 years, 11 months ago) by niro
File MIME type: text/plain
File size: 1543 byte(s)
Wed Oct 28 00:26:51 2009 UTC (14 years, 11 months ago) by niro
File MIME type: text/plain
File size: 1543 byte(s)
tagged 'mkinitrd-6_1_9'
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * mountpoint implementation for busybox |
4 | * |
5 | * Copyright (C) 2005 Bernhard Reutner-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 "libbb.h" |
13 | |
14 | int mountpoint_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
15 | int mountpoint_main(int argc, char **argv) |
16 | { |
17 | struct stat st; |
18 | char *arg; |
19 | int opt = getopt32(argv, "qdx"); |
20 | #define OPT_q (1) |
21 | #define OPT_d (2) |
22 | #define OPT_x (4) |
23 | |
24 | if (optind != argc - 1) |
25 | bb_show_usage(); |
26 | |
27 | arg = argv[optind]; |
28 | |
29 | if ( (opt & OPT_x && stat(arg, &st) == 0) || (lstat(arg, &st) == 0) ) { |
30 | if (opt & OPT_x) { |
31 | if (S_ISBLK(st.st_mode)) { |
32 | printf("%u:%u\n", major(st.st_rdev), |
33 | minor(st.st_rdev)); |
34 | return EXIT_SUCCESS; |
35 | } else { |
36 | if (opt & OPT_q) |
37 | bb_putchar('\n'); |
38 | else |
39 | bb_error_msg("%s: not a block device", arg); |
40 | } |
41 | return EXIT_FAILURE; |
42 | } else |
43 | if (S_ISDIR(st.st_mode)) { |
44 | dev_t st_dev = st.st_dev; |
45 | ino_t st_ino = st.st_ino; |
46 | char *p = xasprintf("%s/..", arg); |
47 | |
48 | if (stat(p, &st) == 0) { |
49 | int ret = (st_dev != st.st_dev) || |
50 | (st_dev == st.st_dev && st_ino == st.st_ino); |
51 | if (opt & OPT_d) |
52 | printf("%u:%u\n", major(st_dev), minor(st_dev)); |
53 | else if (!(opt & OPT_q)) |
54 | printf("%s is %sa mountpoint\n", arg, ret?"":"not "); |
55 | return !ret; |
56 | } |
57 | } else { |
58 | if (!(opt & OPT_q)) |
59 | bb_error_msg("%s: not a directory", arg); |
60 | return EXIT_FAILURE; |
61 | } |
62 | } |
63 | if (!(opt & OPT_q)) |
64 | bb_simple_perror_msg(arg); |
65 | return EXIT_FAILURE; |
66 | } |