1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
35 #include "conf-files.h"
39 static char **arg_proc_cmdline_modules = NULL;
41 static const char conf_file_dirs[] =
42 "/etc/modules-load.d\0"
43 "/run/modules-load.d\0"
44 "/usr/local/lib/modules-load.d\0"
45 "/usr/lib/modules-load.d\0"
47 "/lib/modules-load.d\0"
51 #pragma GCC diagnostic push
52 #pragma GCC diagnostic ignored "-Wformat-nonliteral"
53 static void systemd_kmod_log(void *data, int priority, const char *file, int line,
54 const char *fn, const char *format, va_list args) {
55 log_metav(priority, file, line, fn, format, args);
57 #pragma GCC diagnostic pop
59 static int add_modules(const char *p) {
61 _cleanup_strv_free_ char **k = NULL;
63 k = strv_split(p, ",");
67 t = strv_merge(arg_proc_cmdline_modules, k);
71 strv_free(arg_proc_cmdline_modules);
72 arg_proc_cmdline_modules = t;
77 static int parse_proc_cmdline(void) {
78 _cleanup_free_ char *line = NULL;
83 r = proc_cmdline(&line);
85 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
89 FOREACH_WORD_QUOTED(w, l, line, state) {
90 _cleanup_free_ char *word;
96 if (startswith(word, "modules-load=")) {
98 r = add_modules(word + 13);
102 } else if (startswith(word, "rd.modules-load=")) {
105 r = add_modules(word + 16);
116 static int load_module(struct kmod_ctx *ctx, const char *m) {
117 const int probe_flags = KMOD_PROBE_APPLY_BLACKLIST;
118 struct kmod_list *itr, *modlist = NULL;
121 log_debug("load: %s", m);
123 r = kmod_module_new_from_lookup(ctx, m, &modlist);
125 log_error("Failed to lookup alias '%s': %s", m, strerror(-r));
130 log_error("Failed to find module '%s'", m);
134 kmod_list_foreach(itr, modlist) {
135 struct kmod_module *mod;
138 mod = kmod_module_get_module(itr);
139 state = kmod_module_get_initstate(mod);
142 case KMOD_MODULE_BUILTIN:
143 log_info("Module '%s' is builtin", kmod_module_get_name(mod));
146 case KMOD_MODULE_LIVE:
147 log_debug("Module '%s' is already loaded", kmod_module_get_name(mod));
151 err = kmod_module_probe_insert_module(mod, probe_flags,
152 NULL, NULL, NULL, NULL);
155 log_info("Inserted module '%s'", kmod_module_get_name(mod));
156 else if (err == KMOD_PROBE_APPLY_BLACKLIST)
157 log_info("Module '%s' is blacklisted", kmod_module_get_name(mod));
159 log_error("Failed to insert '%s': %s", kmod_module_get_name(mod),
165 kmod_module_unref(mod);
168 kmod_module_unref_list(modlist);
173 static int apply_file(struct kmod_ctx *ctx, const char *path, bool ignore_enoent) {
174 _cleanup_fclose_ FILE *f = NULL;
180 r = search_and_fopen_nulstr(path, "re", conf_file_dirs, &f);
182 if (ignore_enoent && r == -ENOENT)
185 log_error("Failed to open %s, ignoring: %s", path, strerror(-r));
189 log_debug("apply: %s", path);
191 char line[LINE_MAX], *l;
194 if (!fgets(line, sizeof(line), f)) {
198 log_error("Failed to read file '%s', ignoring: %m", path);
205 if (strchr(COMMENTS "\n", *l))
208 k = load_module(ctx, l);
216 static int help(void) {
218 printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
219 "Loads statically configured kernel modules.\n\n"
220 " -h --help Show this help\n"
221 " --version Show package version\n",
222 program_invocation_short_name);
227 static int parse_argv(int argc, char *argv[]) {
233 static const struct option options[] = {
234 { "help", no_argument, NULL, 'h' },
235 { "version", no_argument, NULL, ARG_VERSION },
244 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
252 puts(PACKAGE_STRING);
253 puts(SYSTEMD_FEATURES);
260 assert_not_reached("Unhandled option");
267 int main(int argc, char *argv[]) {
269 struct kmod_ctx *ctx;
271 r = parse_argv(argc, argv);
273 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
275 log_set_target(LOG_TARGET_AUTO);
276 log_parse_environment();
281 if (parse_proc_cmdline() < 0)
284 ctx = kmod_new(NULL, NULL);
286 log_error("Failed to allocate memory for kmod.");
290 kmod_load_resources(ctx);
291 kmod_set_log_fn(ctx, systemd_kmod_log, NULL);
298 for (i = optind; i < argc; i++) {
299 k = apply_file(ctx, argv[i], false);
305 _cleanup_free_ char **files = NULL;
308 STRV_FOREACH(i, arg_proc_cmdline_modules) {
309 k = load_module(ctx, *i);
314 r = conf_files_list_nulstr(&files, ".conf", NULL, conf_file_dirs);
316 log_error("Failed to enumerate modules-load.d files: %s", strerror(-r));
320 STRV_FOREACH(fn, files) {
321 k = apply_file(ctx, *fn, true);
329 strv_free(arg_proc_cmdline_modules);
331 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;