2 * kmod-rmmod - remove modules from linux kernel using libkmod.
4 * Copyright (C) 2011-2013 ProFUSION embedded systems
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
27 #include <sys/types.h>
29 #include <shared/macro.h>
31 #include <libkmod/libkmod.h>
35 #define DEFAULT_VERBOSE LOG_ERR
36 static int verbose = DEFAULT_VERBOSE;
37 static int use_syslog;
39 static const char cmdopts_s[] = "fsvVwh";
40 static const struct option cmdopts[] = {
41 {"force", no_argument, 0, 'f'},
42 {"syslog", no_argument, 0, 's'},
43 {"verbose", no_argument, 0, 'v'},
44 {"version", no_argument, 0, 'V'},
45 {"help", no_argument, 0, 'h'},
49 static void help(void)
52 "\t%s [options] modulename ...\n"
54 "\t-f, --force forces a module unload and may crash your\n"
55 "\t machine. This requires Forced Module Removal\n"
56 "\t option in your kernel. DANGEROUS\n"
57 "\t-s, --syslog print to syslog, not stderr\n"
58 "\t-v, --verbose enables more messages\n"
59 "\t-V, --version show version\n"
60 "\t-h, --help show this help\n",
61 program_invocation_short_name);
64 static int check_module_inuse(struct kmod_module *mod) {
65 struct kmod_list *holders;
68 state = kmod_module_get_initstate(mod);
70 if (state == KMOD_MODULE_BUILTIN) {
71 ERR("Module %s is builtin.\n", kmod_module_get_name(mod));
73 } else if (state < 0) {
74 ERR("Module %s is not currently loaded\n",
75 kmod_module_get_name(mod));
79 holders = kmod_module_get_holders(mod);
80 if (holders != NULL) {
81 struct kmod_list *itr;
83 ERR("Module %s is in use by:", kmod_module_get_name(mod));
85 kmod_list_foreach(itr, holders) {
86 struct kmod_module *hm = kmod_module_get_module(itr);
87 fprintf(stderr, " %s", kmod_module_get_name(hm));
88 kmod_module_unref(hm);
92 kmod_module_unref_list(holders);
96 ret = kmod_module_get_refcnt(mod);
98 ERR("Module %s is in use\n", kmod_module_get_name(mod));
100 } else if (ret == -ENOENT) {
101 ERR("Module unloading is not supported\n");
107 static int do_rmmod(int argc, char *argv[])
109 struct kmod_ctx *ctx;
110 const char *null_config = NULL;
116 c = getopt_long(argc, argv, cmdopts_s, cmdopts, &idx);
121 flags |= KMOD_REMOVE_FORCE;
133 puts(PACKAGE " version " VERSION);
139 ERR("unexpected getopt_long() value '%c'.\n", c);
144 log_open(use_syslog);
146 if (optind >= argc) {
147 ERR("missing module name.\n");
152 ctx = kmod_new(NULL, &null_config);
154 ERR("kmod_new() failed!\n");
159 log_setup_kmod_log(ctx, verbose);
161 for (i = optind; i < argc; i++) {
162 struct kmod_module *mod;
163 const char *arg = argv[i];
165 if (stat(arg, &st) == 0)
166 err = kmod_module_new_from_path(ctx, arg, &mod);
168 err = kmod_module_new_from_name(ctx, arg, &mod);
171 ERR("could not use module %s: %s\n", arg,
176 if (!(flags & KMOD_REMOVE_FORCE) && check_module_inuse(mod) < 0) {
181 err = kmod_module_remove_module(mod, flags);
183 ERR("could not remove module %s: %s\n", arg,
188 kmod_module_unref(mod);
196 return r == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
199 const struct kmod_cmd kmod_cmd_compat_rmmod = {
202 .help = "compat rmmod command",