1 /* vi: set sw=4 ts=4: */
3 * Modprobe written from scratch for BusyBox
5 * Copyright (c) 2008 Timo Teras <timo.teras@iki.fi>
6 * Copyright (c) 2008 Vladimir Dronnikov
8 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
13 #include <sys/utsname.h>
16 struct modprobe_option {
21 struct modprobe_conf {
22 char probename[MODULE_NAME_LEN];
25 #if ENABLE_FEATURE_MODPROBE_BLACKLIST
26 #define add_to_blacklist(conf, name) llist_add_to(&conf->blacklist, name)
27 #define check_blacklist(conf, name) (llist_find(conf->blacklist, name) == NULL)
30 #define add_to_blacklist(conf, name) do {} while (0)
31 #define check_blacklist(conf, name) (1)
35 #define MODPROBE_OPTS "acdlnrt:VC:" USE_FEATURE_MODPROBE_BLACKLIST("b")
37 MODPROBE_OPT_INSERT_ALL = (INSMOD_OPT_UNUSED << 0), /* a */
38 MODPROBE_OPT_DUMP_ONLY = (INSMOD_OPT_UNUSED << 1), /* c */
39 MODPROBE_OPT_D = (INSMOD_OPT_UNUSED << 2), /* d */
40 MODPROBE_OPT_LIST_ONLY = (INSMOD_OPT_UNUSED << 3), /* l */
41 MODPROBE_OPT_SHOW_ONLY = (INSMOD_OPT_UNUSED << 4), /* n */
42 MODPROBE_OPT_REMOVE = (INSMOD_OPT_UNUSED << 5), /* r */
43 MODPROBE_OPT_RESTRICT = (INSMOD_OPT_UNUSED << 6), /* t */
44 MODPROBE_OPT_VERONLY = (INSMOD_OPT_UNUSED << 7), /* V */
45 MODPROBE_OPT_CONFIGFILE = (INSMOD_OPT_UNUSED << 8), /* C */
46 MODPROBE_OPT_BLACKLIST = (INSMOD_OPT_UNUSED << 9) * ENABLE_FEATURE_MODPROBE_BLACKLIST,
49 static llist_t *loaded;
51 static int read_config(struct modprobe_conf *conf, const char *path);
53 static void add_option(llist_t **all_opts, const char *module, const char *opts)
55 struct modprobe_option *o;
57 o = xzalloc(sizeof(struct modprobe_option));
59 o->module = filename2modname(module, NULL);
60 o->option = xstrdup(opts);
61 llist_add_to(all_opts, o);
64 static int FAST_FUNC config_file_action(const char *filename,
65 struct stat *statbuf UNUSED_PARAM,
67 int depth UNUSED_PARAM)
69 struct modprobe_conf *conf = (struct modprobe_conf *) userdata;
70 RESERVE_CONFIG_BUFFER(modname, MODULE_NAME_LEN);
75 if (bb_basename(filename)[0] == '.')
78 p = config_open2(filename, fopen_for_read);
84 while (config_read(p, tokens, 3, 2, "# \t", PARSE_NORMAL)) {
85 if (strcmp(tokens[0], "alias") == 0) {
86 filename2modname(tokens[1], modname);
88 fnmatch(modname, conf->probename, 0) == 0)
89 llist_add_to(&conf->aliases,
90 filename2modname(tokens[2], NULL));
91 } else if (strcmp(tokens[0], "options") == 0) {
93 add_option(&conf->options, tokens[1], tokens[2]);
94 } else if (strcmp(tokens[0], "include") == 0) {
95 read_config(conf, tokens[1]);
96 } else if (ENABLE_FEATURE_MODPROBE_BLACKLIST &&
97 strcmp(tokens[0], "blacklist") == 0) {
98 add_to_blacklist(conf, xstrdup(tokens[1]));
103 if (ENABLE_FEATURE_CLEAN_UP)
104 RELEASE_CONFIG_BUFFER(modname);
108 static int read_config(struct modprobe_conf *conf, const char *path)
110 return recursive_action(path, ACTION_RECURSE | ACTION_QUIET,
111 config_file_action, NULL, conf, 1);
114 static char *gather_options(llist_t *first, const char *module, int usecmdline)
116 struct modprobe_option *opt;
118 char *opts = xstrdup("");
121 for (n = first; n != NULL; n = n->link) {
122 opt = (struct modprobe_option *) n->data;
124 if (opt->module == NULL && !usecmdline)
126 if (opt->module != NULL && strcmp(opt->module, module) != 0)
129 opts = xrealloc(opts, optlen + strlen(opt->option) + 2);
130 optlen += sprintf(opts + optlen, "%s ", opt->option);
135 static int do_modprobe(struct modprobe_conf *conf, const char *module)
137 RESERVE_CONFIG_BUFFER(modname, MODULE_NAME_LEN);
138 llist_t *deps = NULL;
139 char *fn, *options, *colon = NULL, *tokens[2];
143 p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, fopen_for_read);
147 while (config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)) {
148 colon = last_char_is(tokens[0], ':');
152 filename2modname(tokens[0], modname);
153 if (strcmp(modname, module) == 0)
159 goto error_not_found;
162 llist_add_to(&deps, xstrdup(tokens[0]));
164 string_to_llist(tokens[1], &deps, " ");
166 if (!(option_mask32 & MODPROBE_OPT_REMOVE))
167 deps = llist_rev(deps);
170 while (deps && rc == 0) {
171 fn = llist_pop(&deps);
172 filename2modname(fn, modname);
173 if (option_mask32 & MODPROBE_OPT_REMOVE) {
174 if (bb_delete_module(modname, O_EXCL) != 0)
176 } else if (llist_find(loaded, modname) == NULL) {
177 options = gather_options(conf->options, modname,
178 strcmp(modname, module) == 0);
179 rc = bb_init_module(fn, options);
181 llist_add_to(&loaded, xstrdup(modname));
182 if (ENABLE_FEATURE_CLEAN_UP)
186 if (ENABLE_FEATURE_CLEAN_UP)
193 if (ENABLE_FEATURE_CLEAN_UP)
194 RELEASE_CONFIG_BUFFER(modname);
195 if (rc > 0 && !(option_mask32 & INSMOD_OPT_SILENT))
196 bb_error_msg("Failed to %sload module %s: %s.",
197 (option_mask32 & MODPROBE_OPT_REMOVE) ? "un" : "",
198 module, moderror(rc));
202 int modprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
203 int modprobe_main(int argc UNUSED_PARAM, char **argv)
208 llist_t *options = NULL;
210 opt_complementary = "q-v:v-q";
211 opt = getopt32(argv, INSMOD_OPTS MODPROBE_OPTS INSMOD_ARGS,
215 if (opt & (MODPROBE_OPT_DUMP_ONLY | MODPROBE_OPT_LIST_ONLY |
216 MODPROBE_OPT_SHOW_ONLY))
217 bb_error_msg_and_die("not supported");
219 /* goto modules location */
220 xchdir(CONFIG_DEFAULT_MODULES_DIR);
225 if (opt & MODPROBE_OPT_REMOVE) {
226 if (bb_delete_module(NULL, O_NONBLOCK|O_EXCL) != 0)
227 bb_perror_msg_and_die("rmmod");
231 if (!(opt & MODPROBE_OPT_INSERT_ALL)) {
232 /* If not -a, we have only one module name,
233 * the rest of parameters are options */
234 add_option(&options, NULL, parse_cmdline_module_options(argv));
241 parser_t *parser = config_open2("/proc/modules", fopen_for_read);
242 while (config_read(parser, &s, 1, 1, "# \t", PARSE_NORMAL & ~PARSE_GREEDY))
243 llist_add_to(&loaded, xstrdup(s));
244 config_close(parser);
248 const char *arg = *argv;
249 struct modprobe_conf *conf;
251 conf = xzalloc(sizeof(*conf));
252 conf->options = options;
253 filename2modname(arg, conf->probename);
254 read_config(conf, "/etc/modprobe.conf");
255 read_config(conf, "/etc/modprobe.d");
256 if (ENABLE_FEATURE_MODUTILS_SYMBOLS
257 && conf->aliases == NULL
258 && strncmp(arg, "symbol:", 7) == 0
260 read_config(conf, "modules.symbols");
263 if (ENABLE_FEATURE_MODUTILS_ALIAS && conf->aliases == NULL)
264 read_config(conf, "modules.alias");
266 if (conf->aliases == NULL) {
267 /* Try if module by literal name is found; literal
268 * names are blacklist only if '-b' is given. */
269 if (!(opt & MODPROBE_OPT_BLACKLIST) ||
270 check_blacklist(conf, conf->probename)) {
271 rc = do_modprobe(conf, conf->probename);
272 if (rc < 0 && !(opt & INSMOD_OPT_SILENT))
273 bb_error_msg("Module %s not found.", arg);
276 /* Probe all aliases */
277 while (conf->aliases != NULL) {
278 char *realname = llist_pop(&conf->aliases);
279 if (check_blacklist(conf, realname))
280 do_modprobe(conf, realname);
281 if (ENABLE_FEATURE_CLEAN_UP)