/*
* Mini rmmod implementation for busybox
*
- * Copyright (C) 1999,2000 by Lineo, inc.
- * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+ * Copyright (C) 2008 Timo Teras <timo.teras@iki.fi>
*
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
+//config:config RMMOD
+//config: bool "rmmod (3.6 kb)"
+//config: default y
+//config: select PLATFORM_LINUX
+//config: help
+//config: rmmod is used to unload specified modules from the kernel.
-#include "internal.h"
-#include <stdio.h>
-#include <errno.h>
-#include <unistd.h>
-#define __LIBRARY__
+//applet:IF_RMMOD(IF_NOT_MODPROBE_SMALL(APPLET_NOEXEC(rmmod, rmmod, BB_DIR_SBIN, BB_SUID_DROP, rmmod)))
+//kbuild:ifneq ($(CONFIG_MODPROBE_SMALL),y)
+//kbuild:lib-$(CONFIG_RMMOD) += rmmod.o modutils.o
+//kbuild:endif
+//usage:#if !ENABLE_MODPROBE_SMALL
+//usage:#define rmmod_trivial_usage
+//usage: "[-wfa] [MODULE]..."
+//usage:#define rmmod_full_usage "\n\n"
+//usage: "Unload kernel modules\n"
+//usage: "\n -w Wait until the module is no longer used"
+//usage: "\n -f Force unload"
+//usage: "\n -a Remove all unused modules (recursively)"
+//usage:#define rmmod_example_usage
+//usage: "$ rmmod tulip\n"
+//usage:#endif
-/* And the system call of the day is... */
-_syscall1(int, delete_module, const char *, name)
+#include "libbb.h"
+#include "modutils.h"
+int rmmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int rmmod_main(int argc UNUSED_PARAM, char **argv)
+{
+ int n, err;
+ unsigned flags = O_NONBLOCK | O_EXCL;
-static const char rmmod_usage[] =
- "rmmod [OPTION]... [MODULE]...\n"
-#ifndef BB_FEATURE_TRIVIAL_HELP
- "\nUnloads the specified kernel modules from the kernel.\n\n"
- "Options:\n"
- "\t-a\tTry to remove all unused kernel modules.\n"
-#endif
- ;
-
+ /* Parse command line. */
+ n = getopt32(argv, "wfas"); // -s ignored
+ argv += optind;
+ if (n & 1) // --wait
+ flags &= ~O_NONBLOCK;
+ if (n & 2) // --force
+ flags |= O_TRUNC;
+ if (n & 4) {
+ /* Unload _all_ unused modules via NULL delete_module() call */
+ err = bb_delete_module(NULL, flags);
+ if (err && err != EFAULT)
+ bb_perror_msg_and_die("rmmod");
+ return EXIT_SUCCESS;
+ }
+ if (!*argv)
+ bb_show_usage();
-extern int rmmod_main(int argc, char **argv)
-{
- if (argc <= 1) {
- usage(rmmod_usage);
- }
+ n = ENABLE_FEATURE_2_4_MODULES && get_linux_version_code() < KERNEL_VERSION(2,6,0);
+ while (*argv) {
+ char modname[MODULE_NAME_LEN];
+ const char *bname;
- /* Parse any options */
- while (--argc > 0 && **(++argv) == '-') {
- while (*(++(*argv))) {
- switch (**argv) {
- case 'a':
- /* Unload _all_ unused modules via NULL delete_module() call */
- if (delete_module(NULL)) {
- perror("rmmod");
- exit(FALSE);
- }
- exit(TRUE);
- default:
- usage(rmmod_usage);
- }
- }
+ bname = bb_basename(*argv++);
+ if (n)
+ safe_strncpy(modname, bname, MODULE_NAME_LEN);
+ else
+ filename2modname(bname, modname);
+ err = bb_delete_module(modname, flags);
+ if (err)
+ bb_perror_msg_and_die("can't unload module '%s'",
+ modname);
}
- while (argc-- > 0) {
- if (delete_module(*argv) < 0) {
- perror(*argv);
- }
- argv++;
- }
- return(TRUE);
+ return EXIT_SUCCESS;
}