Contents of /trunk/mkinitrd-magellan/busybox/util-linux/losetup.c
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
File MIME type: text/plain
File size: 1323 byte(s)
Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
File MIME type: text/plain
File size: 1323 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 | * Mini losetup implementation for busybox |
4 | * |
5 | * Copyright (C) 2002 Matt Kraai. |
6 | * |
7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
8 | */ |
9 | |
10 | #include <getopt.h> |
11 | #include <stdlib.h> |
12 | |
13 | #include "busybox.h" |
14 | |
15 | int losetup_main(int argc, char **argv) |
16 | { |
17 | unsigned opt; |
18 | char *opt_o; |
19 | unsigned long long offset = 0; |
20 | |
21 | opt = getopt32(argc, argv, "do:", &opt_o); |
22 | argc -= optind; |
23 | argv += optind; |
24 | |
25 | if (opt == 0x3) // -d + -o (illegal) |
26 | bb_show_usage(); |
27 | |
28 | if (opt == 0x1) { // -d |
29 | /* detach takes exactly one argument */ |
30 | if (argc != 1) |
31 | bb_show_usage(); |
32 | if (!del_loop(argv[0])) |
33 | return EXIT_SUCCESS; |
34 | bb_perror_nomsg_and_die(); |
35 | } |
36 | |
37 | if (opt == 0x2) // -o |
38 | offset = xatoull(opt_o); |
39 | |
40 | /* -o or no option */ |
41 | |
42 | if (argc == 2) { |
43 | if (set_loop(&argv[0], argv[1], offset) < 0) |
44 | bb_perror_nomsg_and_die(); |
45 | } else if (argc == 1) { |
46 | char *s = query_loop(argv[0]); |
47 | if (!s) bb_perror_nomsg_and_die(); |
48 | printf("%s: %s\n", argv[0], s); |
49 | if (ENABLE_FEATURE_CLEAN_UP) free(s); |
50 | } else { |
51 | char dev[sizeof(LOOP_NAME"0")] = LOOP_NAME"0"; |
52 | char c; |
53 | for (c = '0'; c <= '9'; ++c) { |
54 | char *s; |
55 | dev[sizeof(LOOP_NAME"0")-2] = c; |
56 | s = query_loop(dev); |
57 | if (s) { |
58 | printf("%s: %s\n", dev, s); |
59 | if (ENABLE_FEATURE_CLEAN_UP) free(s); |
60 | } |
61 | } |
62 | } |
63 | return EXIT_SUCCESS; |
64 | } |