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 if (strv_extend_strv(&arg_proc_cmdline_modules, k) < 0)
73 static int parse_proc_cmdline(void) {
74 _cleanup_free_ char *line = NULL;
79 r = proc_cmdline(&line);
81 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
85 FOREACH_WORD_QUOTED(w, l, line, state) {
86 _cleanup_free_ char *word;
92 if (startswith(word, "modules-load=")) {
94 r = add_modules(word + 13);
98 } else if (startswith(word, "rd.modules-load=")) {
101 r = add_modules(word + 16);
112 static int load_module(struct kmod_ctx *ctx, const char *m) {
113 const int probe_flags = KMOD_PROBE_APPLY_BLACKLIST;
114 struct kmod_list *itr, *modlist = NULL;
117 log_debug("load: %s", m);
119 r = kmod_module_new_from_lookup(ctx, m, &modlist);
121 log_error("Failed to lookup alias '%s': %s", m, strerror(-r));
126 log_error("Failed to find module '%s'", m);
130 kmod_list_foreach(itr, modlist) {
131 struct kmod_module *mod;
134 mod = kmod_module_get_module(itr);
135 state = kmod_module_get_initstate(mod);
138 case KMOD_MODULE_BUILTIN:
139 log_info("Module '%s' is builtin", kmod_module_get_name(mod));
142 case KMOD_MODULE_LIVE:
143 log_debug("Module '%s' is already loaded", kmod_module_get_name(mod));
147 err = kmod_module_probe_insert_module(mod, probe_flags,
148 NULL, NULL, NULL, NULL);
151 log_info("Inserted module '%s'", kmod_module_get_name(mod));
152 else if (err == KMOD_PROBE_APPLY_BLACKLIST)
153 log_info("Module '%s' is blacklisted", kmod_module_get_name(mod));
155 log_error("Failed to insert '%s': %s", kmod_module_get_name(mod),
161 kmod_module_unref(mod);
164 kmod_module_unref_list(modlist);
169 static int apply_file(struct kmod_ctx *ctx, const char *path, bool ignore_enoent) {
170 _cleanup_fclose_ FILE *f = NULL;
176 r = search_and_fopen_nulstr(path, "re", conf_file_dirs, &f);
178 if (ignore_enoent && r == -ENOENT)
181 log_error("Failed to open %s, ignoring: %s", path, strerror(-r));
185 log_debug("apply: %s", path);
187 char line[LINE_MAX], *l;
190 if (!fgets(line, sizeof(line), f)) {
194 log_error("Failed to read file '%s', ignoring: %m", path);
201 if (strchr(COMMENTS "\n", *l))
204 k = load_module(ctx, l);
212 static int help(void) {
214 printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
215 "Loads statically configured kernel modules.\n\n"
216 " -h --help Show this help\n"
217 " --version Show package version\n",
218 program_invocation_short_name);
223 static int parse_argv(int argc, char *argv[]) {
229 static const struct option options[] = {
230 { "help", no_argument, NULL, 'h' },
231 { "version", no_argument, NULL, ARG_VERSION },
240 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
248 puts(PACKAGE_STRING);
249 puts(SYSTEMD_FEATURES);
256 assert_not_reached("Unhandled option");
263 int main(int argc, char *argv[]) {
265 struct kmod_ctx *ctx;
267 r = parse_argv(argc, argv);
269 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
271 log_set_target(LOG_TARGET_AUTO);
272 log_parse_environment();
277 if (parse_proc_cmdline() < 0)
280 ctx = kmod_new(NULL, NULL);
282 log_error("Failed to allocate memory for kmod.");
286 kmod_load_resources(ctx);
287 kmod_set_log_fn(ctx, systemd_kmod_log, NULL);
294 for (i = optind; i < argc; i++) {
295 k = apply_file(ctx, argv[i], false);
301 _cleanup_free_ char **files = NULL;
304 STRV_FOREACH(i, arg_proc_cmdline_modules) {
305 k = load_module(ctx, *i);
310 r = conf_files_list_nulstr(&files, ".conf", NULL, conf_file_dirs);
312 log_error("Failed to enumerate modules-load.d files: %s", strerror(-r));
316 STRV_FOREACH(fn, files) {
317 k = apply_file(ctx, *fn, true);
325 strv_free(arg_proc_cmdline_modules);
327 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;