1 /* vi: set sw=4 ts=4: */
5 * Copyright (c) 2008 Vladimir Dronnikov
6 * Copyright (c) 2008 Bernhard Reutner-Fischer (initial depmod code)
8 * Licensed under GPLv2, see file LICENSE in this source tree.
11 //applet:IF_MODPROBE_SMALL(APPLET(modprobe, BB_DIR_SBIN, BB_SUID_DROP))
12 //applet:IF_MODPROBE_SMALL(APPLET_ODDNAME(depmod, modprobe, BB_DIR_SBIN, BB_SUID_DROP, depmod))
13 //applet:IF_MODPROBE_SMALL(APPLET_ODDNAME(insmod, modprobe, BB_DIR_SBIN, BB_SUID_DROP, insmod))
14 //applet:IF_MODPROBE_SMALL(APPLET_ODDNAME(lsmod, modprobe, BB_DIR_SBIN, BB_SUID_DROP, lsmod))
15 //applet:IF_MODPROBE_SMALL(APPLET_ODDNAME(rmmod, modprobe, BB_DIR_SBIN, BB_SUID_DROP, rmmod))
18 /* After libbb.h, since it needs sys/types.h on some systems */
19 #include <sys/utsname.h> /* uname() */
22 extern int init_module(void *module, unsigned long len, const char *options);
23 extern int delete_module(const char *module, unsigned flags);
24 extern int query_module(const char *name, int which, void *buf, size_t bufsize, size_t *ret);
25 /* linux/include/linux/module.h has limit of 64 chars on module names */
26 #undef MODULE_NAME_LEN
27 #define MODULE_NAME_LEN 64
31 # define dbg1_error_msg(...) ((void)0)
32 # define dbg2_error_msg(...) ((void)0)
34 # define dbg1_error_msg(...) bb_error_msg(__VA_ARGS__)
35 # define dbg2_error_msg(...) bb_error_msg(__VA_ARGS__)
38 #define DEPFILE_BB CONFIG_DEFAULT_DEPMOD_FILE".bb"
41 OPT_q = (1 << 0), /* be quiet */
42 OPT_r = (1 << 1), /* module removal instead of loading */
45 typedef struct module_info {
56 char *module_load_options;
58 smallint wrote_dep_bb_ok;
59 unsigned module_count;
61 unsigned stringbuf_idx;
62 unsigned stringbuf_size;
63 char *stringbuf; /* some modules have lots of stuff */
64 /* for example, drivers/media/video/saa7134/saa7134.ko */
65 /* therefore having a fixed biggish buffer is not wise */
67 #define G (*ptr_to_globals)
68 #define modinfo (G.modinfo )
69 #define dep_bb_seen (G.dep_bb_seen )
70 #define wrote_dep_bb_ok (G.wrote_dep_bb_ok )
71 #define module_count (G.module_count )
72 #define module_found_idx (G.module_found_idx )
73 #define module_load_options (G.module_load_options)
74 #define stringbuf_idx (G.stringbuf_idx )
75 #define stringbuf_size (G.stringbuf_size )
76 #define stringbuf (G.stringbuf )
77 #define INIT_G() do { \
78 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
81 static void append(const char *s)
83 unsigned len = strlen(s);
84 if (stringbuf_idx + len + 15 > stringbuf_size) {
85 stringbuf_size = stringbuf_idx + len + 127;
86 dbg2_error_msg("grow stringbuf to %u", stringbuf_size);
87 stringbuf = xrealloc(stringbuf, stringbuf_size);
89 memcpy(stringbuf + stringbuf_idx, s, len);
93 static void appendc(char c)
95 /* We appendc() only after append(), + 15 trick in append()
96 * makes it unnecessary to check for overflow here */
97 stringbuf[stringbuf_idx++] = c;
100 static void bksp(void)
106 static void reset_stringbuf(void)
111 static char* copy_stringbuf(void)
113 char *copy = xzalloc(stringbuf_idx + 1); /* terminating NUL */
114 return memcpy(copy, stringbuf, stringbuf_idx);
117 static char* find_keyword(char *ptr, size_t len, const char *word)
121 if (!ptr) /* happens if xmalloc_open_zipped_read_close cannot read it */
126 while ((ssize_t)len > 0) {
128 /* search for the first char in word */
129 ptr = memchr(ptr, *word, len);
130 if (ptr == NULL) /* no occurance left, done */
132 if (strncmp(ptr, word, wlen) == 0)
133 return ptr + wlen; /* found, return ptr past it */
140 static void replace(char *s, char what, char with)
149 static char *filename2modname(const char *filename, char *modname)
154 // Disabled since otherwise "modprobe dir/name" would work
155 // as if it is "modprobe name". It is unclear why
156 // 'basenamization' was here in the first place.
157 //from = bb_get_last_path_component_nostrip(filename);
159 for (i = 0; i < (MODULE_NAME_LEN-1) && from[i] != '\0' && from[i] != '.'; i++)
160 modname[i] = (from[i] == '-') ? '_' : from[i];
166 /* Take "word word", return malloced "word",NUL,"word",NUL,NUL */
167 static char* str_2_list(const char *str)
169 int len = strlen(str) + 1;
170 char *dst = xmalloc(len + 1);
173 memcpy(dst, str, len);
174 //TODO: protect against 2+ spaces: "word word"
175 replace(dst, ' ', '\0');
179 /* We use error numbers in a loose translation... */
180 static const char *moderror(int err)
184 return "invalid module format";
186 return "unknown symbol in module or invalid parameter";
188 return "module has wrong symbol version";
189 case EINVAL: /* "invalid parameter" */
190 return "unknown symbol in module or invalid parameter"
191 + sizeof("unknown symbol in module or");
193 return strerror(err);
197 static int load_module(const char *fname, const char *options)
201 size_t len = MAXINT(ssize_t);
203 dbg1_error_msg("load_module('%s','%s')", fname, options);
205 module_image = xmalloc_open_zipped_read_close(fname, &len);
206 r = (!module_image || init_module(module_image, len, options ? options : "") != 0);
208 dbg1_error_msg("load_module:%d", r);
209 return r; /* 0 = success */
212 dbg1_error_msg("load_module('%s','%s')", fname, options);
217 static void parse_module(module_info *info, const char *pathname)
223 dbg1_error_msg("parse_module('%s')", pathname);
225 /* Read (possibly compressed) module */
226 len = 64 * 1024 * 1024; /* 64 Mb at most */
227 module_image = xmalloc_open_zipped_read_close(pathname, &len);
228 /* module_image == NULL is ok here, find_keyword handles it */
229 //TODO: optimize redundant module body reads
231 /* "alias1 symbol:sym1 alias2 symbol:sym2" */
235 unsigned start = stringbuf_idx;
236 ptr = find_keyword(module_image + pos, len - pos, "alias=");
238 ptr = find_keyword(module_image + pos, len - pos, "__ksymtab_");
241 /* DOCME: __ksymtab_gpl and __ksymtab_strings occur
242 * in many modules. What do they mean? */
243 if (strcmp(ptr, "gpl") == 0 || strcmp(ptr, "strings") == 0)
245 dbg2_error_msg("alias:'symbol:%s'", ptr);
248 dbg2_error_msg("alias:'%s'", ptr);
253 * Don't add redundant aliases, such as:
254 * libcrc32c.ko symbol:crc32c symbol:crc32c
256 if (start) { /* "if we aren't the first alias" */
258 stringbuf[stringbuf_idx] = '\0';
259 last = stringbuf + start;
261 * String at last-1 is " symbol:crc32c "
262 * (with both leading and trailing spaces).
264 if (strncmp(stringbuf, last, stringbuf_idx - start) == 0)
265 /* First alias matches us */
268 /* Does any other alias match? */
269 found = strstr(stringbuf, last-1);
270 if (found < last-1) {
271 /* There is absolutely the same string before us */
272 dbg2_error_msg("redundant:'%s'", last);
273 stringbuf_idx = start;
278 pos = (ptr - module_image);
280 bksp(); /* remove last ' ' */
281 info->aliases = copy_stringbuf();
282 replace(info->aliases, '-', '_');
284 /* "dependency1 depandency2" */
286 ptr = find_keyword(module_image, len, "depends=");
288 replace(ptr, ',', ' ');
289 replace(ptr, '-', '_');
290 dbg2_error_msg("dep:'%s'", ptr);
293 info->deps = copy_stringbuf();
298 static int pathname_matches_modname(const char *pathname, const char *modname)
301 char name[MODULE_NAME_LEN];
302 const char *fname = bb_get_last_path_component_nostrip(pathname);
303 const char *suffix = strrstr(fname, ".ko");
304 safe_strncpy(name, fname, suffix - fname + 1);
305 replace(name, '-', '_');
306 r = (strcmp(name, modname) == 0);
310 static FAST_FUNC int fileAction(const char *pathname,
311 struct stat *sb UNUSED_PARAM,
312 void *modname_to_match,
313 int depth UNUSED_PARAM)
318 pathname += 2; /* skip "./" */
319 fname = bb_get_last_path_component_nostrip(pathname);
320 if (!strrstr(fname, ".ko")) {
321 dbg1_error_msg("'%s' is not a module", pathname);
322 return TRUE; /* not a module, continue search */
325 cur = module_count++;
326 modinfo = xrealloc_vector(modinfo, 12, cur);
327 modinfo[cur].pathname = xstrdup(pathname);
328 /*modinfo[cur].aliases = NULL; - xrealloc_vector did it */
329 /*modinfo[cur+1].pathname = NULL;*/
331 if (!pathname_matches_modname(fname, modname_to_match)) {
332 dbg1_error_msg("'%s' module name doesn't match", pathname);
333 return TRUE; /* module name doesn't match, continue search */
336 dbg1_error_msg("'%s' module name matches", pathname);
337 module_found_idx = cur;
338 parse_module(&modinfo[cur], pathname);
340 if (!(option_mask32 & OPT_r)) {
341 if (load_module(pathname, module_load_options) == 0) {
342 /* Load was successful, there is nothing else to do.
343 * This can happen ONLY for "top-level" module load,
344 * not a dep, because deps dont do dirscan. */
352 static int load_dep_bb(void)
355 FILE *fp = fopen_for_read(DEPFILE_BB);
361 dbg1_error_msg("loading "DEPFILE_BB);
363 /* Why? There is a rare scenario: we did not find modprobe.dep.bb,
364 * we scanned the dir and found no module by name, then we search
365 * for alias (full scan), and we decided to generate modprobe.dep.bb.
366 * But we see modprobe.dep.bb.new! Other modprobe is at work!
367 * We wait and other modprobe renames it to modprobe.dep.bb.
369 * But we already have modinfo[] filled, and "module_count = 0"
370 * makes us start anew. Yes, we leak modinfo[].xxx pointers -
371 * there is not much of data there anyway. */
373 memset(&modinfo[0], 0, sizeof(modinfo[0]));
375 while ((line = xmalloc_fgetline(fp)) != NULL) {
384 space = strchrnul(line, ' ');
385 cur = module_count++;
386 modinfo = xrealloc_vector(modinfo, 12, cur);
387 /*modinfo[cur+1].pathname = NULL; - xrealloc_vector did it */
388 modinfo[cur].pathname = line; /* we take ownership of malloced block here */
391 modinfo[cur].aliases = space;
392 linebuf = xmalloc_fgetline(fp);
393 modinfo[cur].deps = linebuf ? linebuf : xzalloc(1);
394 if (modinfo[cur].deps[0]) {
395 /* deps are not "", so next line must be empty */
396 line = xmalloc_fgetline(fp);
397 /* Refuse to work with damaged config file */
399 bb_error_msg_and_die("error in %s at '%s'", DEPFILE_BB, line);
406 static int start_dep_bb_writeout(void)
410 /* depmod -n: write result to stdout */
411 if (applet_name[0] == 'd' && (option_mask32 & 1))
412 return STDOUT_FILENO;
414 fd = open(DEPFILE_BB".new", O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0644);
416 if (errno == EEXIST) {
418 dbg1_error_msg(DEPFILE_BB".new exists, waiting for "DEPFILE_BB);
420 usleep(1000*1000 / 20);
422 dbg1_error_msg(DEPFILE_BB" appeared");
423 return -2; /* magic number */
428 bb_error_msg("deleting stale %s", DEPFILE_BB".new");
429 fd = open_or_warn(DEPFILE_BB".new", O_WRONLY | O_CREAT | O_TRUNC);
432 dbg1_error_msg("opened "DEPFILE_BB".new:%d", fd);
436 static void write_out_dep_bb(int fd)
441 /* We want good error reporting. fdprintf is not good enough. */
442 fp = xfdopen_for_write(fd);
444 while (modinfo[i].pathname) {
445 fprintf(fp, "%s%s%s\n" "%s%s\n",
446 modinfo[i].pathname, modinfo[i].aliases[0] ? " " : "", modinfo[i].aliases,
447 modinfo[i].deps, modinfo[i].deps[0] ? "\n" : "");
450 /* Badly formatted depfile is a no-no. Be paranoid. */
452 if (ferror(fp) | fclose(fp)) /* | instead of || is intended */
455 if (fd == STDOUT_FILENO) /* it was depmod -n */
458 if (rename(DEPFILE_BB".new", DEPFILE_BB) != 0) {
460 bb_perror_msg("can't create '%s'", DEPFILE_BB);
461 unlink(DEPFILE_BB".new");
465 dbg1_error_msg("created "DEPFILE_BB);
469 static module_info** find_alias(const char *alias)
474 module_info **infovec;
475 dbg1_error_msg("find_alias('%s')", alias);
478 /* First try to find by name (cheaper) */
480 while (modinfo[i].pathname) {
481 if (pathname_matches_modname(modinfo[i].pathname, alias)) {
482 dbg1_error_msg("found '%s' in module '%s'",
483 alias, modinfo[i].pathname);
484 if (!modinfo[i].aliases) {
485 parse_module(&modinfo[i], modinfo[i].pathname);
487 infovec = xzalloc(2 * sizeof(infovec[0]));
488 infovec[0] = &modinfo[i];
494 /* Ok, we definitely have to scan module bodies. This is a good
495 * moment to generate modprobe.dep.bb, if it does not exist yet */
496 dep_bb_fd = dep_bb_seen ? -1 : start_dep_bb_writeout();
497 if (dep_bb_fd == -2) /* modprobe.dep.bb appeared? */
500 /* Scan all module bodies, extract modinfo (it contains aliases) */
504 while (modinfo[i].pathname) {
506 if (!modinfo[i].aliases) {
507 parse_module(&modinfo[i], modinfo[i].pathname);
509 /* "alias1 symbol:sym1 alias2 symbol:sym2" */
510 desc = str_2_list(modinfo[i].aliases);
511 /* Does matching substring exist? */
512 for (s = desc; *s; s += strlen(s) + 1) {
513 /* Aliases in module bodies can be defined with
514 * shell patterns. Example:
515 * "pci:v000010DEd000000D9sv*sd*bc*sc*i*".
516 * Plain strcmp() won't catch that */
517 if (fnmatch(s, alias, 0) == 0) {
518 dbg1_error_msg("found alias '%s' in module '%s'",
519 alias, modinfo[i].pathname);
520 infovec = xrealloc_vector(infovec, 1, infoidx);
521 infovec[infoidx++] = &modinfo[i];
529 /* Create module.dep.bb if needed */
530 if (dep_bb_fd >= 0) {
531 write_out_dep_bb(dep_bb_fd);
534 dbg1_error_msg("find_alias '%s' returns %d results", alias, infoidx);
538 #if ENABLE_FEATURE_MODPROBE_SMALL_CHECK_ALREADY_LOADED
539 // TODO: open only once, invent config_rewind()
540 static int already_loaded(const char *name)
544 parser_t *parser = config_open2("/proc/modules", xfopen_for_read);
545 while (config_read(parser, &s, 1, 1, "# \t", PARSE_NORMAL & ~PARSE_GREEDY)) {
546 if (strcmp(s, name) == 0) {
551 config_close(parser);
555 #define already_loaded(name) is_rmmod
559 * Given modules definition and module name (or alias, or symbol)
560 * load/remove the module respecting dependencies.
561 * NB: also called by depmod with bogus name "/",
562 * just in order to force modprobe.dep.bb creation.
564 #if !ENABLE_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE
565 #define process_module(a,b) process_module(a)
566 #define cmdline_options ""
568 static void process_module(char *name, const char *cmdline_options)
570 char *s, *deps, *options;
571 module_info **infovec;
574 int is_rmmod = (option_mask32 & OPT_r) != 0;
576 dbg1_error_msg("process_module('%s','%s')", name, cmdline_options);
578 replace(name, '-', '_');
580 dbg1_error_msg("already_loaded:%d is_rmmod:%d", already_loaded(name), is_rmmod);
582 * We used to have "is_rmmod != already_loaded(name)" check here, but
583 * modprobe -r pci:v00008086d00007010sv00000000sd00000000bc01sc01i80
584 * won't unload modules (there are more than one)
585 * which have this alias.
587 if (!is_rmmod && already_loaded(name)) {
588 dbg1_error_msg("nothing to do for '%s'", name);
594 char *opt_filename = xasprintf("/etc/modules/%s", name);
595 options = xmalloc_open_read_close(opt_filename, NULL);
597 replace(options, '\n', ' ');
598 #if ENABLE_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE
599 if (cmdline_options) {
600 /* NB: cmdline_options always have one leading ' '
601 * (see main()), we remove it here */
602 char *op = xasprintf(options ? "%s %s" : "%s %s" + 3,
603 cmdline_options + 1, options);
609 module_load_options = options;
610 dbg1_error_msg("process_module('%s'): options:'%s'", name, options);
614 /* Scan module directory. This is done only once.
615 * It will attempt module load, and will exit(EXIT_SUCCESS)
618 module_found_idx = -1;
619 recursive_action(".",
620 ACTION_RECURSE, /* flags */
621 fileAction, /* file action */
622 NULL, /* dir action */
623 name, /* user data */
626 dbg1_error_msg("dirscan complete");
627 /* Module was not found, or load failed, or is_rmmod */
628 if (module_found_idx >= 0) { /* module was found */
629 infovec = xzalloc(2 * sizeof(infovec[0]));
630 infovec[0] = &modinfo[module_found_idx];
631 } else { /* search for alias, not a plain module name */
632 infovec = find_alias(name);
635 infovec = find_alias(name);
639 /* both dirscan and find_alias found nothing */
640 if (!is_rmmod && applet_name[0] != 'd') /* it wasn't rmmod or depmod */
641 bb_error_msg("module '%s' not found", name);
642 //TODO: _and_die()? or should we continue (un)loading modules listed on cmdline?
646 /* There can be more than one module for the given alias. For example,
647 * "pci:v00008086d00007010sv00000000sd00000000bc01sc01i80" matches
648 * ata_piix because it has alias "pci:v00008086d00007010sv*sd*bc*sc*i*"
649 * and ata_generic, it has alias "pci:v*d*sv*sd*bc01sc01i*"
650 * Standard modprobe loads them both. We achieve it by returning
651 * a *list* of modinfo pointers from find_alias().
654 /* rmmod or modprobe -r? unload module(s) */
657 while ((info = infovec[infoidx++]) != NULL) {
659 char modname[MODULE_NAME_LEN];
662 bb_get_last_path_component_nostrip(info->pathname), modname);
663 r = delete_module(modname, O_NONBLOCK | O_EXCL);
664 dbg1_error_msg("delete_module('%s', O_NONBLOCK | O_EXCL):%d", modname, r);
666 if (!(option_mask32 & OPT_q))
667 bb_perror_msg("remove '%s'", modname);
672 if (applet_name[0] == 'r') {
673 /* rmmod: do not remove dependencies, exit */
677 /* modprobe -r: we do not stop here -
678 * continue to unload modules on which the module depends:
679 * "-r --remove: option causes modprobe to remove a module.
680 * If the modules it depends on are also unused, modprobe
681 * will try to remove them, too."
686 while ((info = infovec[infoidx++]) != NULL) {
687 /* Iterate thru dependencies, trying to (un)load them */
688 deps = str_2_list(info->deps);
689 for (s = deps; *s; s += strlen(s) + 1) {
690 //if (strcmp(name, s) != 0) // N.B. do loops exist?
691 dbg1_error_msg("recurse on dep '%s'", s);
692 process_module(s, NULL);
693 dbg1_error_msg("recurse on dep '%s' done", s);
700 /* We are modprobe: load it */
701 if (options && strstr(options, "blacklist")) {
702 dbg1_error_msg("'%s': blacklisted", info->pathname);
706 if (load_module(info->pathname, options) != 0) {
707 if (EEXIST != errno) {
708 bb_error_msg("'%s': %s",
712 dbg1_error_msg("'%s': %s",
721 //TODO: return load attempt result from process_module.
722 //If dep didn't load ok, continuing makes little sense.
724 #undef cmdline_options
727 /* For reference, module-init-tools v3.4 options:
730 Usage: insmod filename [args]
733 Usage: rmmod [-fhswvV] modulename ...
734 -f (or --force) forces a module unload, and may crash your
735 machine. This requires the Forced Module Removal option
736 when the kernel was compiled.
737 -h (or --help) prints this help text
738 -s (or --syslog) says use syslog, not stderr
739 -v (or --verbose) enables more messages
740 -V (or --version) prints the version code
741 -w (or --wait) begins module removal even if it is used
742 and will stop new users from accessing the module (so it
743 should eventually fall to zero).
746 Usage: modprobe [-v] [-V] [-C config-file] [-n] [-i] [-q] [-b]
747 [-o <modname>] [ --dump-modversions ] <modname> [parameters...]
748 modprobe -r [-n] [-i] [-v] <modulename> ...
749 modprobe -l -t <dirname> [ -a <modulename> ...]
752 depmod 3.4 -- part of module-init-tools
753 depmod -[aA] [-n -e -v -q -V -r -u]
754 [-b basedirectory] [forced_version]
755 depmod [-n -e -v -q -r -u] [-F kernelsyms] module1.ko module2.ko ...
756 If no arguments (except options) are given, "depmod -a" is assumed.
757 depmod will output a dependency list suitable for the modprobe utility.
759 -a, --all Probe all modules
760 -A, --quick Only does the work if there's a new module
761 -n, --show Write the dependency file on stdout only
762 -e, --errsyms Report not supplied symbols
763 -V, --version Print the release version
764 -v, --verbose Enable verbose mode
765 -h, --help Print this usage message
766 The following options are useful for people managing distributions:
768 --basedir basedirectory
769 Use an image of a module tree
771 --filesyms kernelsyms
772 Use the file instead of the current kernel symbols
775 //usage:#if ENABLE_MODPROBE_SMALL
777 //usage:#define depmod_trivial_usage NOUSAGE_STR
778 //usage:#define depmod_full_usage ""
780 //usage:#define lsmod_trivial_usage
782 //usage:#define lsmod_full_usage "\n\n"
783 //usage: "List the currently loaded kernel modules"
785 //usage:#define insmod_trivial_usage
786 //usage: IF_FEATURE_2_4_MODULES("[OPTIONS] MODULE ")
787 //usage: IF_NOT_FEATURE_2_4_MODULES("FILE ")
788 //usage: "[SYMBOL=VALUE]..."
789 //usage:#define insmod_full_usage "\n\n"
790 //usage: "Load kernel module"
791 //usage: IF_FEATURE_2_4_MODULES( "\n"
792 //usage: "\n -f Force module to load into the wrong kernel version"
793 //usage: "\n -k Make module autoclean-able"
794 //usage: "\n -v Verbose"
795 //usage: "\n -q Quiet"
796 //usage: "\n -L Lock: prevent simultaneous loads"
797 //usage: IF_FEATURE_INSMOD_LOAD_MAP(
798 //usage: "\n -m Output load map to stdout"
800 //usage: "\n -x Don't export externs"
803 //usage:#define rmmod_trivial_usage
804 //usage: "[-wfa] [MODULE]..."
805 //usage:#define rmmod_full_usage "\n\n"
806 //usage: "Unload kernel modules\n"
807 //usage: "\n -w Wait until the module is no longer used"
808 //usage: "\n -f Force unload"
809 //usage: "\n -a Remove all unused modules (recursively)"
811 //usage:#define rmmod_example_usage
812 //usage: "$ rmmod tulip\n"
814 //usage:#define modprobe_trivial_usage
815 //usage: "[-qfwrsv] MODULE [SYMBOL=VALUE]..."
816 //usage:#define modprobe_full_usage "\n\n"
817 //usage: " -r Remove MODULE (stacks) or do autoclean"
818 //usage: "\n -q Quiet"
819 //usage: "\n -v Verbose"
820 //usage: "\n -f Force"
821 //usage: "\n -w Wait for unload"
822 //usage: "\n -s Report via syslog instead of stderr"
826 int modprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
827 int modprobe_main(int argc UNUSED_PARAM, char **argv)
830 char applet0 = applet_name[0];
831 IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(char *options;)
833 /* are we lsmod? -> just dump /proc/modules */
834 if ('l' == applet0) {
835 xprint_and_close_file(xfopen_for_read("/proc/modules"));
841 /* Prevent ugly corner cases with no modules at all */
842 modinfo = xzalloc(sizeof(modinfo[0]));
844 if ('i' != applet0) { /* not insmod */
845 /* Goto modules directory */
846 xchdir(CONFIG_DEFAULT_MODULES_DIR);
848 uname(&uts); /* never fails */
851 if ('d' == applet0) {
853 * -n: print result to stdout
854 * -a: process all modules (default)
855 * optional VERSION parameter
857 * -A: do work only if a module is newer than depfile
858 * -e: report any symbols which a module needs
859 * which are not supplied by other modules or the kernel
860 * -F FILE: System.map (symbols for -e)
863 * -b BASEDIR: (TODO!) modules are in
864 * $BASEDIR/lib/modules/$VERSION
865 * -v: human readable deps to stdout
866 * -V: version (don't want to support it - people may depend
867 * on it as an indicator of "standard" depmod)
868 * -h: help (well duh)
869 * module1.o module2.o parameters (just ignored for now)
871 getopt32(argv, "na" "AeF:qru" /* "b:vV", NULL */, NULL);
873 /* if (argv[0] && argv[1]) bb_show_usage(); */
874 /* Goto $VERSION directory */
875 xchdir(argv[0] ? argv[0] : uts.release);
876 /* Force full module scan by asking to find a bogus module.
877 * This will generate modules.dep.bb as a side effect. */
878 process_module((char*)"/", NULL);
879 return !wrote_dep_bb_ok;
882 /* insmod, modprobe, rmmod require at least one argument */
883 opt_complementary = "-1";
884 /* only -q (quiet) and -r (rmmod),
885 * the rest are accepted and ignored (compat) */
886 getopt32(argv, "qrfsvwb");
889 /* are we rmmod? -> simulate modprobe -r */
890 if ('r' == applet0) {
891 option_mask32 |= OPT_r;
894 if ('i' != applet0) { /* not insmod */
895 /* Goto $VERSION directory */
899 #if ENABLE_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE
900 /* If not rmmod, parse possible module options given on command line.
901 * insmod/modprobe takes one module name, the rest are parameters. */
903 if ('r' != applet0) {
906 /* Enclose options in quotes */
908 options = xasprintf("%s \"%s\"", s ? s : "", *arg);
918 if ('i' == applet0) { /* insmod */
922 len = MAXINT(ssize_t);
923 map = xmalloc_open_zipped_read_close(*argv, &len);
925 bb_perror_msg_and_die("can't read '%s'", *argv);
926 if (init_module(map, len,
927 IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(options ? options : "")
928 IF_NOT_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE("")
931 bb_error_msg_and_die("can't insert '%s': %s",
932 *argv, moderror(errno));
937 /* Try to load modprobe.dep.bb */
940 /* Load/remove modules.
941 * Only rmmod loops here, modprobe has only argv[0] */
943 process_module(*argv, options);
946 if (ENABLE_FEATURE_CLEAN_UP) {
947 IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(free(options);)