/* 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 (3.6 kb)" //config: default y //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; }