source: branches/3.2/mindi-busybox/modutils/rmmod.c @ 3232

Last change on this file since 3232 was 3232, checked in by bruno, 5 years ago
  • Update mindi-busybox to 1.21.1
File size: 1.8 KB
Line 
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
28int rmmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
29int 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}
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