X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=modutils%2Frmmod.c;h=df50e58afe4be1f6c4639ecedecc36c443131cd3;hb=9a4100cf53f75356854ce752374babf8135c3f42;hp=5129b34958adb0da37bf13849da2a0d84f278f51;hpb=dadfb4975b23b284fa02d15a5cfd21593b2993fc;p=oweals%2Fbusybox.git diff --git a/modutils/rmmod.c b/modutils/rmmod.c index 5129b3495..df50e58af 100644 --- a/modutils/rmmod.c +++ b/modutils/rmmod.c @@ -3,98 +3,77 @@ * Mini rmmod implementation for busybox * * Copyright (C) 1999-2004 by Erik Andersen + * Copyright (C) 2008 Timo Teras * - * 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. */ +//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. -#include "libbb.h" - -#ifdef __UCLIBC__ -extern int delete_module(const char *module, unsigned int flags); -#else -# include -# define delete_module(mod, flags) syscall(__NR_delete_module, mod, flags) -#endif - -#if ENABLE_FEATURE_2_6_MODULES -static 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; +//applet:IF_RMMOD(IF_NOT_MODPROBE_SMALL(APPLET_NOEXEC(rmmod, rmmod, BB_DIR_SBIN, BB_SUID_DROP, rmmod))) - /* 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 +//kbuild:ifneq ($(CONFIG_MODPROBE_SMALL),y) +//kbuild:lib-$(CONFIG_RMMOD) += rmmod.o modutils.o +//kbuild:endif -// 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) MAIN_EXTERNALLY_VISIBLE; -int rmmod_main(int argc, char **argv) +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, err; + 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 (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"); - } - } + err = bb_delete_module(NULL, flags); + if (err && err != 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 (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); + err = bb_delete_module(modname, flags); + if (err) + bb_perror_msg_and_die("can't unload module '%s'", + modname); } - return ret; + return EXIT_SUCCESS; }