| 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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| 6 | * Copyright (C) 2008 Timo Teras <timo.teras@iki.fi>
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| 7 | *
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| 8 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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| 9 | */
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| 10 |
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| 11 | //applet:IF_RMMOD(APPLET(rmmod, BB_DIR_SBIN, BB_SUID_DROP))
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| 12 |
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| 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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| 24 |
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| 25 | #include "libbb.h"
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| 26 | #include "modutils.h"
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| 27 |
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| 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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| 30 | {
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| 31 | int n, err;
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| 32 | unsigned flags = O_NONBLOCK | O_EXCL;
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| 33 |
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| 34 | /* Parse command line. */
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| 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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| 38 | flags &= ~O_NONBLOCK;
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| 39 | if (n & 2) // --force
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| 40 | flags |= O_TRUNC;
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| 41 | if (n & 4) {
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| 42 | /* Unload _all_ unused modules via NULL delete_module() call */
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| 43 | err = bb_delete_module(NULL, flags);
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| 44 | if (err && err != EFAULT)
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| 45 | bb_perror_msg_and_die("rmmod");
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| 46 | return EXIT_SUCCESS;
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| 47 | }
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| 48 |
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| 49 | if (!*argv)
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| 50 | bb_show_usage();
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| 51 |
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| 52 | n = ENABLE_FEATURE_2_4_MODULES && get_linux_version_code() < KERNEL_VERSION(2,6,0);
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| 53 | while (*argv) {
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| 54 | char modname[MODULE_NAME_LEN];
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| 55 | const char *bname;
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| 56 |
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| 57 | bname = bb_basename(*argv++);
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| 58 | if (n)
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| 59 | safe_strncpy(modname, bname, MODULE_NAME_LEN);
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| 60 | else
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| 61 | filename2modname(bname, modname);
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| 62 | err = bb_delete_module(modname, flags);
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| 63 | if (err)
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| 64 | bb_perror_msg_and_die("can't unload module '%s'",
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| 65 | modname);
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| 66 | }
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| 67 |
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| 68 | return EXIT_SUCCESS;
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| 69 | }
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