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 static int pathname_matches_modname(const char *pathname, const char *modname)
169 char name[MODULE_NAME_LEN];
170 filename2modname(bb_get_last_path_component_nostrip(pathname), name);
171 r = (strcmp(name, modname) == 0);
175 /* Take "word word", return malloced "word",NUL,"word",NUL,NUL */
176 static char* str_2_list(const char *str)
178 int len = strlen(str) + 1;
179 char *dst = xmalloc(len + 1);
182 memcpy(dst, str, len);
183 //TODO: protect against 2+ spaces: "word word"
184 replace(dst, ' ', '\0');
188 /* We use error numbers in a loose translation... */
189 static const char *moderror(int err)
193 return "invalid module format";
195 return "unknown symbol in module or invalid parameter";
197 return "module has wrong symbol version";
198 case EINVAL: /* "invalid parameter" */
199 return "unknown symbol in module or invalid parameter"
200 + sizeof("unknown symbol in module or");
202 return strerror(err);
206 static int load_module(const char *fname, const char *options)
210 size_t len = MAXINT(ssize_t);
212 dbg1_error_msg("load_module('%s','%s')", fname, options);
214 module_image = xmalloc_open_zipped_read_close(fname, &len);
215 r = (!module_image || init_module(module_image, len, options ? options : "") != 0);
217 dbg1_error_msg("load_module:%d", r);
218 return r; /* 0 = success */
221 dbg1_error_msg("load_module('%s','%s')", fname, options);
226 static void parse_module(module_info *info, const char *pathname)
232 dbg1_error_msg("parse_module('%s')", pathname);
234 /* Read (possibly compressed) module */
235 len = 64 * 1024 * 1024; /* 64 Mb at most */
236 module_image = xmalloc_open_zipped_read_close(pathname, &len);
237 /* module_image == NULL is ok here, find_keyword handles it */
238 //TODO: optimize redundant module body reads
240 /* "alias1 symbol:sym1 alias2 symbol:sym2" */
244 unsigned start = stringbuf_idx;
245 ptr = find_keyword(module_image + pos, len - pos, "alias=");
247 ptr = find_keyword(module_image + pos, len - pos, "__ksymtab_");
250 /* DOCME: __ksymtab_gpl and __ksymtab_strings occur
251 * in many modules. What do they mean? */
252 if (strcmp(ptr, "gpl") == 0 || strcmp(ptr, "strings") == 0)
254 dbg2_error_msg("alias:'symbol:%s'", ptr);
257 dbg2_error_msg("alias:'%s'", ptr);
262 * Don't add redundant aliases, such as:
263 * libcrc32c.ko symbol:crc32c symbol:crc32c
265 if (start) { /* "if we aren't the first alias" */
267 stringbuf[stringbuf_idx] = '\0';
268 last = stringbuf + start;
270 * String at last-1 is " symbol:crc32c "
271 * (with both leading and trailing spaces).
273 if (strncmp(stringbuf, last, stringbuf_idx - start) == 0)
274 /* First alias matches us */
277 /* Does any other alias match? */
278 found = strstr(stringbuf, last-1);
279 if (found < last-1) {
280 /* There is absolutely the same string before us */
281 dbg2_error_msg("redundant:'%s'", last);
282 stringbuf_idx = start;
287 pos = (ptr - module_image);
289 bksp(); /* remove last ' ' */
290 info->aliases = copy_stringbuf();
291 replace(info->aliases, '-', '_');
293 /* "dependency1 depandency2" */
295 ptr = find_keyword(module_image, len, "depends=");
297 replace(ptr, ',', ' ');
298 replace(ptr, '-', '_');
299 dbg2_error_msg("dep:'%s'", ptr);
302 info->deps = copy_stringbuf();
307 static FAST_FUNC int fileAction(const char *pathname,
308 struct stat *sb UNUSED_PARAM,
309 void *modname_to_match,
310 int depth UNUSED_PARAM)
315 pathname += 2; /* skip "./" */
316 fname = bb_get_last_path_component_nostrip(pathname);
317 if (!strrstr(fname, ".ko")) {
318 dbg1_error_msg("'%s' is not a module", pathname);
319 return TRUE; /* not a module, continue search */
322 cur = module_count++;
323 modinfo = xrealloc_vector(modinfo, 12, cur);
324 modinfo[cur].pathname = xstrdup(pathname);
325 /*modinfo[cur].aliases = NULL; - xrealloc_vector did it */
326 /*modinfo[cur+1].pathname = NULL;*/
328 if (!pathname_matches_modname(fname, modname_to_match)) {
329 dbg1_error_msg("'%s' module name doesn't match", pathname);
330 return TRUE; /* module name doesn't match, continue search */
333 dbg1_error_msg("'%s' module name matches", pathname);
334 module_found_idx = cur;
335 parse_module(&modinfo[cur], pathname);
337 if (!(option_mask32 & OPT_r)) {
338 if (load_module(pathname, module_load_options) == 0) {
339 /* Load was successful, there is nothing else to do.
340 * This can happen ONLY for "top-level" module load,
341 * not a dep, because deps dont do dirscan. */
349 static int load_dep_bb(void)
352 FILE *fp = fopen_for_read(DEPFILE_BB);
358 dbg1_error_msg("loading "DEPFILE_BB);
360 /* Why? There is a rare scenario: we did not find modprobe.dep.bb,
361 * we scanned the dir and found no module by name, then we search
362 * for alias (full scan), and we decided to generate modprobe.dep.bb.
363 * But we see modprobe.dep.bb.new! Other modprobe is at work!
364 * We wait and other modprobe renames it to modprobe.dep.bb.
366 * But we already have modinfo[] filled, and "module_count = 0"
367 * makes us start anew. Yes, we leak modinfo[].xxx pointers -
368 * there is not much of data there anyway. */
370 memset(&modinfo[0], 0, sizeof(modinfo[0]));
372 while ((line = xmalloc_fgetline(fp)) != NULL) {
381 space = strchrnul(line, ' ');
382 cur = module_count++;
383 modinfo = xrealloc_vector(modinfo, 12, cur);
384 /*modinfo[cur+1].pathname = NULL; - xrealloc_vector did it */
385 modinfo[cur].pathname = line; /* we take ownership of malloced block here */
388 modinfo[cur].aliases = space;
389 linebuf = xmalloc_fgetline(fp);
390 modinfo[cur].deps = linebuf ? linebuf : xzalloc(1);
391 if (modinfo[cur].deps[0]) {
392 /* deps are not "", so next line must be empty */
393 line = xmalloc_fgetline(fp);
394 /* Refuse to work with damaged config file */
396 bb_error_msg_and_die("error in %s at '%s'", DEPFILE_BB, line);
403 static int start_dep_bb_writeout(void)
407 /* depmod -n: write result to stdout */
408 if (applet_name[0] == 'd' && (option_mask32 & 1))
409 return STDOUT_FILENO;
411 fd = open(DEPFILE_BB".new", O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0644);
413 if (errno == EEXIST) {
415 dbg1_error_msg(DEPFILE_BB".new exists, waiting for "DEPFILE_BB);
417 usleep(1000*1000 / 20);
419 dbg1_error_msg(DEPFILE_BB" appeared");
420 return -2; /* magic number */
425 bb_error_msg("deleting stale %s", DEPFILE_BB".new");
426 fd = open_or_warn(DEPFILE_BB".new", O_WRONLY | O_CREAT | O_TRUNC);
429 dbg1_error_msg("opened "DEPFILE_BB".new:%d", fd);
433 static void write_out_dep_bb(int fd)
438 /* We want good error reporting. fdprintf is not good enough. */
439 fp = xfdopen_for_write(fd);
441 while (modinfo[i].pathname) {
442 fprintf(fp, "%s%s%s\n" "%s%s\n",
443 modinfo[i].pathname, modinfo[i].aliases[0] ? " " : "", modinfo[i].aliases,
444 modinfo[i].deps, modinfo[i].deps[0] ? "\n" : "");
447 /* Badly formatted depfile is a no-no. Be paranoid. */
449 if (ferror(fp) | fclose(fp)) /* | instead of || is intended */
452 if (fd == STDOUT_FILENO) /* it was depmod -n */
455 if (rename(DEPFILE_BB".new", DEPFILE_BB) != 0) {
457 bb_perror_msg("can't create '%s'", DEPFILE_BB);
458 unlink(DEPFILE_BB".new");
462 dbg1_error_msg("created "DEPFILE_BB);
466 static module_info** find_alias(const char *alias)
471 module_info **infovec;
472 dbg1_error_msg("find_alias('%s')", alias);
475 /* First try to find by name (cheaper) */
477 while (modinfo[i].pathname) {
478 if (pathname_matches_modname(modinfo[i].pathname, alias)) {
479 dbg1_error_msg("found '%s' in module '%s'",
480 alias, modinfo[i].pathname);
481 if (!modinfo[i].aliases) {
482 parse_module(&modinfo[i], modinfo[i].pathname);
484 infovec = xzalloc(2 * sizeof(infovec[0]));
485 infovec[0] = &modinfo[i];
491 /* Ok, we definitely have to scan module bodies. This is a good
492 * moment to generate modprobe.dep.bb, if it does not exist yet */
493 dep_bb_fd = dep_bb_seen ? -1 : start_dep_bb_writeout();
494 if (dep_bb_fd == -2) /* modprobe.dep.bb appeared? */
497 /* Scan all module bodies, extract modinfo (it contains aliases) */
501 while (modinfo[i].pathname) {
503 if (!modinfo[i].aliases) {
504 parse_module(&modinfo[i], modinfo[i].pathname);
506 /* "alias1 symbol:sym1 alias2 symbol:sym2" */
507 desc = str_2_list(modinfo[i].aliases);
508 /* Does matching substring exist? */
509 for (s = desc; *s; s += strlen(s) + 1) {
510 /* Aliases in module bodies can be defined with
511 * shell patterns. Example:
512 * "pci:v000010DEd000000D9sv*sd*bc*sc*i*".
513 * Plain strcmp() won't catch that */
514 if (fnmatch(s, alias, 0) == 0) {
515 dbg1_error_msg("found alias '%s' in module '%s'",
516 alias, modinfo[i].pathname);
517 infovec = xrealloc_vector(infovec, 1, infoidx);
518 infovec[infoidx++] = &modinfo[i];
526 /* Create module.dep.bb if needed */
527 if (dep_bb_fd >= 0) {
528 write_out_dep_bb(dep_bb_fd);
531 dbg1_error_msg("find_alias '%s' returns %d results", alias, infoidx);
535 #if ENABLE_FEATURE_MODPROBE_SMALL_CHECK_ALREADY_LOADED
536 // TODO: open only once, invent config_rewind()
537 static int already_loaded(const char *name)
545 fp = fopen_for_read("/proc/modules");
548 namelen = strlen(name);
549 while ((line = xmalloc_fgetline(fp)) != NULL) {
552 // Examples from kernel 3.14.6:
553 //pcspkr 12718 0 - Live 0xffffffffa017e000
554 //snd_timer 28690 2 snd_seq,snd_pcm, Live 0xffffffffa025e000
555 //i915 801405 2 - Live 0xffffffffa0096000
556 if (strncmp(line, name, namelen) != 0 || line[namelen] != ' ') {
560 live = strstr(line, " Live");
563 /* State can be Unloading, Loading, or Live.
564 * modprobe must not return prematurely if we see "Loading":
565 * it can cause further programs to assume load completed,
566 * but it did not (yet)!
567 * Wait up to 5*20 ms for it to resolve.
571 break; /* huh? report as "not loaded" */
584 #define already_loaded(name) 0
587 static int rmmod(const char *filename)
590 char modname[MODULE_NAME_LEN];
592 filename2modname(filename, modname);
593 r = delete_module(modname, O_NONBLOCK | O_EXCL);
594 dbg1_error_msg("delete_module('%s', O_NONBLOCK | O_EXCL):%d", modname, r);
595 if (r != 0 && !(option_mask32 & OPT_q)) {
596 bb_perror_msg("remove '%s'", modname);
602 * Given modules definition and module name (or alias, or symbol)
603 * load/remove the module respecting dependencies.
604 * NB: also called by depmod with bogus name "/",
605 * just in order to force modprobe.dep.bb creation.
607 #if !ENABLE_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE
608 #define process_module(a,b) process_module(a)
609 #define cmdline_options ""
611 static void process_module(char *name, const char *cmdline_options)
613 char *s, *deps, *options;
614 module_info **infovec;
617 int is_remove = (option_mask32 & OPT_r) != 0;
619 dbg1_error_msg("process_module('%s','%s')", name, cmdline_options);
621 replace(name, '-', '_');
623 dbg1_error_msg("already_loaded:%d is_remove:%d", already_loaded(name), is_remove);
625 if (applet_name[0] == 'r') {
627 * Does not remove dependencies, no need to scan, just remove.
628 * (compat note: this allows and strips .ko suffix)
635 * We used to have "is_remove != already_loaded(name)" check here, but
636 * modprobe -r pci:v00008086d00007010sv00000000sd00000000bc01sc01i80
637 * won't unload modules (there are more than one)
638 * which have this alias.
640 if (!is_remove && already_loaded(name)) {
641 dbg1_error_msg("nothing to do for '%s'", name);
647 char *opt_filename = xasprintf("/etc/modules/%s", name);
648 options = xmalloc_open_read_close(opt_filename, NULL);
650 replace(options, '\n', ' ');
651 #if ENABLE_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE
652 if (cmdline_options) {
653 /* NB: cmdline_options always have one leading ' '
654 * (see main()), we remove it here */
655 char *op = xasprintf(options ? "%s %s" : "%s %s" + 3,
656 cmdline_options + 1, options);
662 module_load_options = options;
663 dbg1_error_msg("process_module('%s'): options:'%s'", name, options);
667 /* Scan module directory. This is done only once.
668 * It will attempt module load, and will exit(EXIT_SUCCESS)
671 module_found_idx = -1;
672 recursive_action(".",
673 ACTION_RECURSE, /* flags */
674 fileAction, /* file action */
675 NULL, /* dir action */
676 name, /* user data */
679 dbg1_error_msg("dirscan complete");
680 /* Module was not found, or load failed, or is_remove */
681 if (module_found_idx >= 0) { /* module was found */
682 infovec = xzalloc(2 * sizeof(infovec[0]));
683 infovec[0] = &modinfo[module_found_idx];
684 } else { /* search for alias, not a plain module name */
685 infovec = find_alias(name);
688 infovec = find_alias(name);
692 /* both dirscan and find_alias found nothing */
693 if (!is_remove && applet_name[0] != 'd') /* it wasn't rmmod or depmod */
694 bb_error_msg("module '%s' not found", name);
695 //TODO: _and_die()? or should we continue (un)loading modules listed on cmdline?
699 /* There can be more than one module for the given alias. For example,
700 * "pci:v00008086d00007010sv00000000sd00000000bc01sc01i80" matches
701 * ata_piix because it has alias "pci:v00008086d00007010sv*sd*bc*sc*i*"
702 * and ata_generic, it has alias "pci:v*d*sv*sd*bc01sc01i*"
703 * Standard modprobe loads them both. We achieve it by returning
704 * a *list* of modinfo pointers from find_alias().
707 /* modprobe -r? unload module(s) */
710 while ((info = infovec[infoidx++]) != NULL) {
711 int r = rmmod(bb_get_last_path_component_nostrip(info->pathname));
713 goto ret; /* error */
716 /* modprobe -r: we do not stop here -
717 * continue to unload modules on which the module depends:
718 * "-r --remove: option causes modprobe to remove a module.
719 * If the modules it depends on are also unused, modprobe
720 * will try to remove them, too."
725 while ((info = infovec[infoidx++]) != NULL) {
726 /* Iterate thru dependencies, trying to (un)load them */
727 deps = str_2_list(info->deps);
728 for (s = deps; *s; s += strlen(s) + 1) {
729 //if (strcmp(name, s) != 0) // N.B. do loops exist?
730 dbg1_error_msg("recurse on dep '%s'", s);
731 process_module(s, NULL);
732 dbg1_error_msg("recurse on dep '%s' done", s);
739 /* We are modprobe: load it */
740 if (options && strstr(options, "blacklist")) {
741 dbg1_error_msg("'%s': blacklisted", info->pathname);
745 if (load_module(info->pathname, options) != 0) {
746 if (EEXIST != errno) {
747 bb_error_msg("'%s': %s",
751 dbg1_error_msg("'%s': %s",
760 //TODO: return load attempt result from process_module.
761 //If dep didn't load ok, continuing makes little sense.
763 #undef cmdline_options
766 /* For reference, module-init-tools v3.4 options:
769 Usage: insmod filename [args]
772 Usage: rmmod [-fhswvV] modulename ...
773 -f (or --force) forces a module unload, and may crash your
774 machine. This requires the Forced Module Removal option
775 when the kernel was compiled.
776 -h (or --help) prints this help text
777 -s (or --syslog) says use syslog, not stderr
778 -v (or --verbose) enables more messages
779 -V (or --version) prints the version code
780 -w (or --wait) begins module removal even if it is used
781 and will stop new users from accessing the module (so it
782 should eventually fall to zero).
785 Usage: modprobe [-v] [-V] [-C config-file] [-n] [-i] [-q] [-b]
786 [-o <modname>] [ --dump-modversions ] <modname> [parameters...]
787 modprobe -r [-n] [-i] [-v] <modulename> ...
788 modprobe -l -t <dirname> [ -a <modulename> ...]
791 depmod 3.4 -- part of module-init-tools
792 depmod -[aA] [-n -e -v -q -V -r -u]
793 [-b basedirectory] [forced_version]
794 depmod [-n -e -v -q -r -u] [-F kernelsyms] module1.ko module2.ko ...
795 If no arguments (except options) are given, "depmod -a" is assumed.
796 depmod will output a dependency list suitable for the modprobe utility.
798 -a, --all Probe all modules
799 -A, --quick Only does the work if there's a new module
800 -n, --show Write the dependency file on stdout only
801 -e, --errsyms Report not supplied symbols
802 -V, --version Print the release version
803 -v, --verbose Enable verbose mode
804 -h, --help Print this usage message
805 The following options are useful for people managing distributions:
807 --basedir basedirectory
808 Use an image of a module tree
810 --filesyms kernelsyms
811 Use the file instead of the current kernel symbols
814 //usage:#if ENABLE_MODPROBE_SMALL
816 //usage:#define depmod_trivial_usage NOUSAGE_STR
817 //usage:#define depmod_full_usage ""
819 //usage:#define lsmod_trivial_usage
821 //usage:#define lsmod_full_usage "\n\n"
822 //usage: "List the currently loaded kernel modules"
824 //usage:#define insmod_trivial_usage
825 //usage: IF_FEATURE_2_4_MODULES("[OPTIONS] MODULE ")
826 //usage: IF_NOT_FEATURE_2_4_MODULES("FILE ")
827 //usage: "[SYMBOL=VALUE]..."
828 //usage:#define insmod_full_usage "\n\n"
829 //usage: "Load kernel module"
830 //usage: IF_FEATURE_2_4_MODULES( "\n"
831 //usage: "\n -f Force module to load into the wrong kernel version"
832 //usage: "\n -k Make module autoclean-able"
833 //usage: "\n -v Verbose"
834 //usage: "\n -q Quiet"
835 //usage: "\n -L Lock: prevent simultaneous loads"
836 //usage: IF_FEATURE_INSMOD_LOAD_MAP(
837 //usage: "\n -m Output load map to stdout"
839 //usage: "\n -x Don't export externs"
842 //usage:#define rmmod_trivial_usage
843 //usage: "[-wfa] [MODULE]..."
844 //usage:#define rmmod_full_usage "\n\n"
845 //usage: "Unload kernel modules\n"
846 //usage: "\n -w Wait until the module is no longer used"
847 //usage: "\n -f Force unload"
848 //usage: "\n -a Remove all unused modules (recursively)"
850 //usage:#define rmmod_example_usage
851 //usage: "$ rmmod tulip\n"
853 //usage:#define modprobe_trivial_usage
854 //usage: "[-qfwrsv] MODULE [SYMBOL=VALUE]..."
855 //usage:#define modprobe_full_usage "\n\n"
856 //usage: " -r Remove MODULE (stacks) or do autoclean"
857 //usage: "\n -q Quiet"
858 //usage: "\n -v Verbose"
859 //usage: "\n -f Force"
860 //usage: "\n -w Wait for unload"
861 //usage: "\n -s Report via syslog instead of stderr"
865 int modprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
866 int modprobe_main(int argc UNUSED_PARAM, char **argv)
869 char applet0 = applet_name[0];
870 IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(char *options;)
872 /* are we lsmod? -> just dump /proc/modules */
873 if ('l' == applet0) {
874 xprint_and_close_file(xfopen_for_read("/proc/modules"));
880 /* Prevent ugly corner cases with no modules at all */
881 modinfo = xzalloc(sizeof(modinfo[0]));
883 if ('i' != applet0) { /* not insmod */
884 /* Goto modules directory */
885 xchdir(CONFIG_DEFAULT_MODULES_DIR);
887 uname(&uts); /* never fails */
890 if ('d' == applet0) {
892 * -n: print result to stdout
893 * -a: process all modules (default)
894 * optional VERSION parameter
896 * -A: do work only if a module is newer than depfile
897 * -e: report any symbols which a module needs
898 * which are not supplied by other modules or the kernel
899 * -F FILE: System.map (symbols for -e)
902 * -b BASEDIR: (TODO!) modules are in
903 * $BASEDIR/lib/modules/$VERSION
904 * -v: human readable deps to stdout
905 * -V: version (don't want to support it - people may depend
906 * on it as an indicator of "standard" depmod)
907 * -h: help (well duh)
908 * module1.o module2.o parameters (just ignored for now)
910 getopt32(argv, "na" "AeF:qru" /* "b:vV", NULL */, NULL);
912 /* if (argv[0] && argv[1]) bb_show_usage(); */
913 /* Goto $VERSION directory */
914 xchdir(argv[0] ? argv[0] : uts.release);
915 /* Force full module scan by asking to find a bogus module.
916 * This will generate modules.dep.bb as a side effect. */
917 process_module((char*)"/", NULL);
918 return !wrote_dep_bb_ok;
921 /* insmod, modprobe, rmmod require at least one argument */
922 opt_complementary = "-1";
923 /* only -q (quiet) and -r (rmmod),
924 * the rest are accepted and ignored (compat) */
925 getopt32(argv, "qrfsvwb");
928 /* are we rmmod? -> simulate modprobe -r */
929 if ('r' == applet0) {
930 option_mask32 |= OPT_r;
933 if ('i' != applet0) { /* not insmod */
934 /* Goto $VERSION directory */
938 #if ENABLE_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE
939 /* If not rmmod/-r, parse possible module options given on command line.
940 * insmod/modprobe takes one module name, the rest are parameters. */
942 if (!(option_mask32 & OPT_r)) {
945 /* Enclose options in quotes */
947 options = xasprintf("%s \"%s\"", s ? s : "", *arg);
953 if (!(option_mask32 & OPT_r))
957 if ('i' == applet0) { /* insmod */
961 len = MAXINT(ssize_t);
962 map = xmalloc_open_zipped_read_close(*argv, &len);
964 bb_perror_msg_and_die("can't read '%s'", *argv);
965 if (init_module(map, len,
966 IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(options ? options : "")
967 IF_NOT_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE("")
970 bb_error_msg_and_die("can't insert '%s': %s",
971 *argv, moderror(errno));
976 /* Try to load modprobe.dep.bb */
977 if ('r' != applet0) /* not rmmod */
980 /* Load/remove modules.
981 * Only rmmod/modprobe -r loops here, insmod/modprobe has only argv[0] */
983 process_module(*argv, options);
986 if (ENABLE_FEATURE_CLEAN_UP) {
987 IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(free(options);)