* Mini rmmod implementation for busybox
*
* 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 tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
-#include "libbb.h"
-#include <sys/syscall.h>
-
-#if ENABLE_FEATURE_2_6_MODULES
-static inline void filename2modname(char *modname, const char *afterslash)
-{
- unsigned int i;
- int kr_chk = 1;
-
- if (ENABLE_FEATURE_2_4_MODULES
- && get_linux_version_code() <= KERNEL_VERSION(2,6,0))
- kr_chk = 0;
-
- /* Convert to underscores, stop at first . */
- for (i = 0; afterslash[i] && afterslash[i] != '.'; i++) {
- if (kr_chk && (afterslash[i] == '-'))
- modname[i] = '_';
- else
- modname[i] = afterslash[i];
- }
- modname[i] = '\0';
-}
-#else
-void filename2modname(char *modname, const char *afterslash);
-#endif
+//applet:IF_RMMOD(APPLET(rmmod, BB_DIR_SBIN, BB_SUID_DROP))
-// There really should be a header file for this...
+//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
-int query_module(const char *name, int which, void *buf,
- size_t bufsize, size_t *ret);
+#include "libbb.h"
+#include "modutils.h"
-int rmmod_main(int argc, char **argv);
-int rmmod_main(int argc, char **argv)
+int rmmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int rmmod_main(int argc UNUSED_PARAM, char **argv)
{
- int n, ret = EXIT_SUCCESS;
- unsigned int flags = O_NONBLOCK|O_EXCL;
-
-#define misc_buf bb_common_bufsiz1
+ int n;
+ unsigned flags = O_NONBLOCK | O_EXCL;
/* Parse command line. */
- n = getopt32(argv, "wfa");
- if (n & 1) // --wait
+ n = getopt32(argv, "wfas"); // -s ignored
+ argv += optind;
+ if (n & 1) // --wait
flags &= ~O_NONBLOCK;
- if (n & 2) // --force
+ if (n & 2) // --force
flags |= O_TRUNC;
if (n & 4) {
/* Unload _all_ unused modules via NULL delete_module() call */
- /* until the number of modules does not change */
- size_t nmod = 0; /* number of modules */
- size_t pnmod = -1; /* previous number of modules */
-
- while (nmod != pnmod) {
- if (syscall(__NR_delete_module, NULL, flags) != 0) {
- if (errno == EFAULT)
- return ret;
- bb_perror_msg_and_die("rmmod");
- }
- pnmod = nmod;
- // the 1 here is QM_MODULES.
- if (ENABLE_FEATURE_QUERY_MODULE_INTERFACE && query_module(NULL,
- 1, misc_buf, sizeof(misc_buf),
- &nmod))
- {
- bb_perror_msg_and_die("QM_MODULES");
- }
- }
+ if (bb_delete_module(NULL, flags) != 0 && errno != EFAULT)
+ bb_perror_msg_and_die("rmmod");
return EXIT_SUCCESS;
}
- if (optind == argc)
+ if (!*argv)
bb_show_usage();
- for (n = optind; n < argc; n++) {
- if (ENABLE_FEATURE_2_6_MODULES) {
- filename2modname(misc_buf, bb_basename(argv[n]));
- }
+ 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;
- if (syscall(__NR_delete_module, ENABLE_FEATURE_2_6_MODULES ? misc_buf : argv[n], flags)) {
- bb_simple_perror_msg(argv[n]);
- ret = EXIT_FAILURE;
- }
+ bname = bb_basename(*argv++);
+ if (n)
+ safe_strncpy(modname, bname, MODULE_NAME_LEN);
+ else
+ filename2modname(bname, modname);
+ if (bb_delete_module(modname, flags))
+ bb_error_msg_and_die("can't unload '%s': %s",
+ modname, moderror(errno));
}
- return ret;
+ return EXIT_SUCCESS;
}