blob: 4a4a91982c1e4b77b49ab7dd928b21cddfda3104 [file] [log] [blame]
Erik Andersene49d5ec2000-02-08 19:58:47 +00001/* vi: set sw=4 ts=4: */
Erik Andersen3d7e3411999-12-16 23:04:20 +00002/*
3 * Mini rmmod implementation for busybox
4 *
Eric Andersenc7bda1c2004-03-15 08:29:22 +00005 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
Denis Vlasenkoba1315d2008-09-13 14:59:38 +00006 * Copyright (C) 2008 Timo Teras <timo.teras@iki.fi>
Erik Andersen3d7e3411999-12-16 23:04:20 +00007 *
Denys Vlasenko0ef64bd2010-08-16 20:14:46 +02008 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
Erik Andersen3d7e3411999-12-16 23:04:20 +00009 */
10
Denys Vlasenkob9f2d9f2011-01-18 13:58:01 +010011//applet:IF_RMMOD(APPLET(rmmod, BB_DIR_SBIN, BB_SUID_DROP))
Denys Vlasenkoc15613c2010-10-15 11:29:02 +020012
Denys Vlasenko1a5e11c2010-10-16 01:56:41 +020013//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"
Denys Vlasenko1a5e11c2010-10-16 01:56:41 +020018//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
Denis Vlasenkob6adbf12007-05-26 19:00:18 +000025#include "libbb.h"
Denis Vlasenkoba1315d2008-09-13 14:59:38 +000026#include "modutils.h"
Rob Landleyabfe1072006-08-28 19:40:08 +000027
Denis Vlasenko9b49a5e2007-10-11 10:05:36 +000028int rmmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
Denis Vlasenkoba1315d2008-09-13 14:59:38 +000029int rmmod_main(int argc UNUSED_PARAM, char **argv)
Erik Andersen3d7e3411999-12-16 23:04:20 +000030{
Denis Vlasenkoba1315d2008-09-13 14:59:38 +000031 int n;
Denis Vlasenko1f632292009-04-13 02:25:40 +000032 unsigned flags = O_NONBLOCK | O_EXCL;
Erik Andersen3d7e3411999-12-16 23:04:20 +000033
Mark Whitleyf90c28d2001-03-09 21:49:12 +000034 /* Parse command line. */
Denis Vlasenkoba1315d2008-09-13 14:59:38 +000035 n = getopt32(argv, "wfas"); // -s ignored
36 argv += optind;
Denys Vlasenkofb132e42010-10-29 11:46:52 +020037 if (n & 1) // --wait
"Vladimir N. Oleynik"8c44f012005-11-28 15:54:22 +000038 flags &= ~O_NONBLOCK;
Denys Vlasenkofb132e42010-10-29 11:46:52 +020039 if (n & 2) // --force
"Vladimir N. Oleynik"8c44f012005-11-28 15:54:22 +000040 flags |= O_TRUNC;
Denis Vlasenko51742f42007-04-12 00:32:05 +000041 if (n & 4) {
"Vladimir N. Oleynik"8c44f012005-11-28 15:54:22 +000042 /* Unload _all_ unused modules via NULL delete_module() call */
Denis Vlasenkoba1315d2008-09-13 14:59:38 +000043 if (bb_delete_module(NULL, flags) != 0 && errno != EFAULT)
44 bb_perror_msg_and_die("rmmod");
"Vladimir N. Oleynik"8c44f012005-11-28 15:54:22 +000045 return EXIT_SUCCESS;
Erik Andersen3d7e3411999-12-16 23:04:20 +000046 }
Erik Andersene49d5ec2000-02-08 19:58:47 +000047
Denis Vlasenkoba1315d2008-09-13 14:59:38 +000048 if (!*argv)
Eric Andersen3b1a7442003-12-24 20:30:45 +000049 bb_show_usage();
Mark Whitleyf90c28d2001-03-09 21:49:12 +000050
Denis Vlasenko1f632292009-04-13 02:25:40 +000051 n = ENABLE_FEATURE_2_4_MODULES && get_linux_version_code() < KERNEL_VERSION(2,6,0);
Denis Vlasenkoba1315d2008-09-13 14:59:38 +000052 while (*argv) {
53 char modname[MODULE_NAME_LEN];
Denis Vlasenko1f632292009-04-13 02:25:40 +000054 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);
Denis Vlasenkoba1315d2008-09-13 14:59:38 +000061 if (bb_delete_module(modname, flags))
Denis Vlasenko1f632292009-04-13 02:25:40 +000062 bb_error_msg_and_die("can't unload '%s': %s",
Denis Vlasenkoba1315d2008-09-13 14:59:38 +000063 modname, moderror(errno));
Erik Andersene49d5ec2000-02-08 19:58:47 +000064 }
Mark Whitleyf90c28d2001-03-09 21:49:12 +000065
Denis Vlasenkoba1315d2008-09-13 14:59:38 +000066 return EXIT_SUCCESS;
Erik Andersen3d7e3411999-12-16 23:04:20 +000067}