blob: 4c4d50885a11643f42398111d2554581ce1c0062
| 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * Mini rmmod implementation for busybox |
| 4 | * |
| 5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> |
| 6 | * Copyright (C) 2008 Timo Teras <timo.teras@iki.fi> |
| 7 | * |
| 8 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
| 9 | */ |
| 10 | //config:config RMMOD |
| 11 | //config: bool "rmmod" |
| 12 | //config: default n |
| 13 | //config: select PLATFORM_LINUX |
| 14 | //config: help |
| 15 | //config: rmmod is used to unload specified modules from the kernel. |
| 16 | |
| 17 | //applet:IF_RMMOD(IF_NOT_MODPROBE_SMALL(APPLET(rmmod, BB_DIR_SBIN, BB_SUID_DROP))) |
| 18 | |
| 19 | //kbuild:ifneq ($(CONFIG_MODPROBE_SMALL),y) |
| 20 | //kbuild:lib-$(CONFIG_RMMOD) += rmmod.o modutils.o |
| 21 | //kbuild:endif |
| 22 | |
| 23 | //usage:#if !ENABLE_MODPROBE_SMALL |
| 24 | //usage:#define rmmod_trivial_usage |
| 25 | //usage: "[-wfa] [MODULE]..." |
| 26 | //usage:#define rmmod_full_usage "\n\n" |
| 27 | //usage: "Unload kernel modules\n" |
| 28 | //usage: "\n -w Wait until the module is no longer used" |
| 29 | //usage: "\n -f Force unload" |
| 30 | //usage: "\n -a Remove all unused modules (recursively)" |
| 31 | //usage:#define rmmod_example_usage |
| 32 | //usage: "$ rmmod tulip\n" |
| 33 | //usage:#endif |
| 34 | |
| 35 | #include "libbb.h" |
| 36 | #include "modutils.h" |
| 37 | |
| 38 | int rmmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| 39 | int rmmod_main(int argc UNUSED_PARAM, char **argv) |
| 40 | { |
| 41 | int n, err; |
| 42 | unsigned flags = O_NONBLOCK | O_EXCL; |
| 43 | |
| 44 | /* Parse command line. */ |
| 45 | n = getopt32(argv, "wfas"); // -s ignored |
| 46 | argv += optind; |
| 47 | if (n & 1) // --wait |
| 48 | flags &= ~O_NONBLOCK; |
| 49 | if (n & 2) // --force |
| 50 | flags |= O_TRUNC; |
| 51 | if (n & 4) { |
| 52 | /* Unload _all_ unused modules via NULL delete_module() call */ |
| 53 | err = bb_delete_module(NULL, flags); |
| 54 | if (err && err != EFAULT) |
| 55 | bb_perror_msg_and_die("rmmod"); |
| 56 | return EXIT_SUCCESS; |
| 57 | } |
| 58 | |
| 59 | if (!*argv) |
| 60 | bb_show_usage(); |
| 61 | |
| 62 | n = ENABLE_FEATURE_2_4_MODULES && get_linux_version_code() < KERNEL_VERSION(2,6,0); |
| 63 | while (*argv) { |
| 64 | char modname[MODULE_NAME_LEN]; |
| 65 | const char *bname; |
| 66 | |
| 67 | bname = bb_basename(*argv++); |
| 68 | if (n) |
| 69 | safe_strncpy(modname, bname, MODULE_NAME_LEN); |
| 70 | else |
| 71 | filename2modname(bname, modname); |
| 72 | err = bb_delete_module(modname, flags); |
| 73 | if (err) |
| 74 | bb_perror_msg_and_die("can't unload module '%s'", |
| 75 | modname); |
| 76 | } |
| 77 | |
| 78 | return EXIT_SUCCESS; |
| 79 | } |
| 80 |