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: "\nOptions:"
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19 | //usage: "\n -w Wait until the module is no longer used"
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20 | //usage: "\n -f Force unload"
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21 | //usage: "\n -a Remove all unused modules (recursively)"
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22 | //usage:#define rmmod_example_usage
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23 | //usage: "$ rmmod tulip\n"
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24 | //usage:#endif
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25 |
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26 | #include "libbb.h"
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27 | #include "modutils.h"
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28 |
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29 | int rmmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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30 | int rmmod_main(int argc UNUSED_PARAM, char **argv)
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31 | {
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32 | int n;
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33 | unsigned flags = O_NONBLOCK | O_EXCL;
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34 |
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35 | /* Parse command line. */
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36 | n = getopt32(argv, "wfas"); // -s ignored
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37 | argv += optind;
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38 | if (n & 1) // --wait
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39 | flags &= ~O_NONBLOCK;
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40 | if (n & 2) // --force
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41 | flags |= O_TRUNC;
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42 | if (n & 4) {
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43 | /* Unload _all_ unused modules via NULL delete_module() call */
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44 | if (bb_delete_module(NULL, flags) != 0 && errno != 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 | if (bb_delete_module(modname, flags))
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63 | bb_error_msg_and_die("can't unload '%s': %s",
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64 | modname, moderror(errno));
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65 | }
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66 |
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67 | return EXIT_SUCCESS;
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68 | }
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