blob: f13ff9eb6552c776ff4071f71d584a5750dd58c6
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Mini rmmod implementation for busybox |
4 | * |
5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> |
6 | * Copyright (C) 2008 Timo Teras <timo.teras@iki.fi> |
7 | * |
8 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
9 | */ |
10 | |
11 | //applet:IF_RMMOD(APPLET(rmmod, BB_DIR_SBIN, BB_SUID_DROP)) |
12 | |
13 | //usage:#if !ENABLE_MODPROBE_SMALL |
14 | //usage:#define rmmod_trivial_usage |
15 | //usage: "[-wfa] [MODULE]..." |
16 | //usage:#define rmmod_full_usage "\n\n" |
17 | //usage: "Unload kernel modules\n" |
18 | //usage: "\n -w Wait until the module is no longer used" |
19 | //usage: "\n -f Force unload" |
20 | //usage: "\n -a Remove all unused modules (recursively)" |
21 | //usage:#define rmmod_example_usage |
22 | //usage: "$ rmmod tulip\n" |
23 | //usage:#endif |
24 | |
25 | #include "libbb.h" |
26 | #include "modutils.h" |
27 | |
28 | int rmmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
29 | int rmmod_main(int argc UNUSED_PARAM, char **argv) |
30 | { |
31 | int n; |
32 | unsigned flags = O_NONBLOCK | O_EXCL; |
33 | |
34 | /* Parse command line. */ |
35 | n = getopt32(argv, "wfas"); // -s ignored |
36 | argv += optind; |
37 | if (n & 1) // --wait |
38 | flags &= ~O_NONBLOCK; |
39 | if (n & 2) // --force |
40 | flags |= O_TRUNC; |
41 | if (n & 4) { |
42 | /* Unload _all_ unused modules via NULL delete_module() call */ |
43 | if (bb_delete_module(NULL, flags) != 0 && errno != EFAULT) |
44 | bb_perror_msg_and_die("rmmod"); |
45 | return EXIT_SUCCESS; |
46 | } |
47 | |
48 | if (!*argv) |
49 | bb_show_usage(); |
50 | |
51 | n = ENABLE_FEATURE_2_4_MODULES && get_linux_version_code() < KERNEL_VERSION(2,6,0); |
52 | while (*argv) { |
53 | char modname[MODULE_NAME_LEN]; |
54 | const char *bname; |
55 | |
56 | bname = bb_basename(*argv++); |
57 | if (n) |
58 | safe_strncpy(modname, bname, MODULE_NAME_LEN); |
59 | else |
60 | filename2modname(bname, modname); |
61 | if (bb_delete_module(modname, flags)) |
62 | bb_error_msg_and_die("can't unload '%s': %s", |
63 | modname, moderror(errno)); |
64 | } |
65 | |
66 | return EXIT_SUCCESS; |
67 | } |
68 |