Start 1.33.0 development cycle

[oweals/busybox.git] / modutils / rmmod.c

diff --git a/modutils/rmmod.c b/modutils/rmmod.c
index bc5c03e62fe546e6330c090ecbd650b6bdc2339b..8d4639f50db78bb26ccf7d0ae748151aa66a88b9 100644 (file)
--- a/modutils/rmmod.c
+++ b/modutils/rmmod.c
@@ -2,75 +2,78 @@
 /*
  * 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 (3.3 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__
-#include <asm/unistd.h>
-/* #include <sys/syscall.h> */
-
-
+//applet:IF_RMMOD(IF_NOT_MODPROBE_SMALL(APPLET_NOEXEC(rmmod, rmmod, BB_DIR_SBIN, BB_SUID_DROP, rmmod)))
 
-/* And the system call of the day is...  */
-_syscall1(int, delete_module, const char *, name)
+//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
 
-static const char rmmod_usage[] =
-       "rmmod [OPTION]... [MODULE]...\n\n"
-       "Unloads the specified kernel modules from the kernel.\n\n"
+#include "libbb.h"
+#include "modutils.h"
 
-       "Options:\n" "\t-a\tTry to remove all unused kernel modules.\n";
+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;
 
+       /* 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_simple_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++;
-       }
-       exit(TRUE);
+       return EXIT_SUCCESS;
 }