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/* vi: set sw=4 ts=4: */
/*
* 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 source tree.
*/
//config:config RMMOD
//config: bool "rmmod"
//config: default n
//config: select PLATFORM_LINUX
//config: help
//config: rmmod is used to unload specified modules from the kernel.
//applet:IF_RMMOD(IF_NOT_MODPROBE_SMALL(APPLET(rmmod, BB_DIR_SBIN, BB_SUID_DROP)))
//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
#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;
/* 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();
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;
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);
}
return EXIT_SUCCESS;
}
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