[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Mini rmmod implementation for busybox
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| 4 | *
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| 5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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[2725] | 6 | * Copyright (C) 2008 Timo Teras <timo.teras@iki.fi>
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[821] | 7 | *
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[2725] | 8 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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[821] | 9 | */
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| 10 |
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[3232] | 11 | //applet:IF_RMMOD(APPLET(rmmod, BB_DIR_SBIN, BB_SUID_DROP))
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[821] | 12 |
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[2725] | 13 | //usage:#if !ENABLE_MODPROBE_SMALL
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| 14 | //usage:#define rmmod_trivial_usage
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| 15 | //usage: "[-wfa] [MODULE]..."
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| 16 | //usage:#define rmmod_full_usage "\n\n"
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| 17 | //usage: "Unload kernel modules\n"
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| 18 | //usage: "\n -w Wait until the module is no longer used"
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| 19 | //usage: "\n -f Force unload"
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| 20 | //usage: "\n -a Remove all unused modules (recursively)"
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| 21 | //usage:#define rmmod_example_usage
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| 22 | //usage: "$ rmmod tulip\n"
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| 23 | //usage:#endif
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[821] | 24 |
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[2725] | 25 | #include "libbb.h"
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| 26 | #include "modutils.h"
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[1765] | 27 |
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[2725] | 28 | int rmmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 29 | int rmmod_main(int argc UNUSED_PARAM, char **argv)
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[821] | 30 | {
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[2725] | 31 | int n;
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| 32 | unsigned flags = O_NONBLOCK | O_EXCL;
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[821] | 33 |
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| 34 | /* Parse command line. */
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[2725] | 35 | n = getopt32(argv, "wfas"); // -s ignored
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| 36 | argv += optind;
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| 37 | if (n & 1) // --wait
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[821] | 38 | flags &= ~O_NONBLOCK;
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[2725] | 39 | if (n & 2) // --force
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[821] | 40 | flags |= O_TRUNC;
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[1765] | 41 | if (n & 4) {
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[821] | 42 | /* Unload _all_ unused modules via NULL delete_module() call */
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[2725] | 43 | if (bb_delete_module(NULL, flags) != 0 && errno != EFAULT)
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| 44 | bb_perror_msg_and_die("rmmod");
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[821] | 45 | return EXIT_SUCCESS;
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| 46 | }
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| 47 |
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[2725] | 48 | if (!*argv)
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[821] | 49 | bb_show_usage();
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| 50 |
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[2725] | 51 | n = ENABLE_FEATURE_2_4_MODULES && get_linux_version_code() < KERNEL_VERSION(2,6,0);
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| 52 | while (*argv) {
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| 53 | char modname[MODULE_NAME_LEN];
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| 54 | const char *bname;
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[821] | 55 |
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[2725] | 56 | bname = bb_basename(*argv++);
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| 57 | if (n)
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| 58 | safe_strncpy(modname, bname, MODULE_NAME_LEN);
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| 59 | else
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| 60 | filename2modname(bname, modname);
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| 61 | if (bb_delete_module(modname, flags))
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| 62 | bb_error_msg_and_die("can't unload '%s': %s",
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[3232] | 63 | modname, moderror(errno));
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[821] | 64 | }
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| 65 |
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[2725] | 66 | return EXIT_SUCCESS;
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[821] | 67 | }
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