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) 0
558 static int rmmod(const char *filename
)
561 char modname
[MODULE_NAME_LEN
];
563 filename2modname(filename
, modname
);
564 r
= delete_module(modname
, O_NONBLOCK
| O_EXCL
);
565 dbg1_error_msg("delete_module('%s', O_NONBLOCK | O_EXCL):%d", modname
, r
);
566 if (r
!= 0 && !(option_mask32
& OPT_q
)) {
567 bb_perror_msg("remove '%s'", modname
);
573 * Given modules definition and module name (or alias, or symbol)
574 * load/remove the module respecting dependencies.
575 * NB: also called by depmod with bogus name "/",
576 * just in order to force modprobe.dep.bb creation.
578 #if !ENABLE_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE
579 #define process_module(a,b) process_module(a)
580 #define cmdline_options ""
582 static void process_module(char *name
, const char *cmdline_options
)
584 char *s
, *deps
, *options
;
585 module_info
**infovec
;
588 int is_remove
= (option_mask32
& OPT_r
) != 0;
590 dbg1_error_msg("process_module('%s','%s')", name
, cmdline_options
);
592 replace(name
, '-', '_');
594 dbg1_error_msg("already_loaded:%d is_remove:%d", already_loaded(name
), is_remove
);
596 if (applet_name
[0] == 'r') {
598 * Does not remove dependencies, no need to scan, just remove.
599 * (compat note: this allows and strips .ko suffix)
606 * We used to have "is_remove != already_loaded(name)" check here, but
607 * modprobe -r pci:v00008086d00007010sv00000000sd00000000bc01sc01i80
608 * won't unload modules (there are more than one)
609 * which have this alias.
611 if (!is_remove
&& already_loaded(name
)) {
612 dbg1_error_msg("nothing to do for '%s'", name
);
618 char *opt_filename
= xasprintf("/etc/modules/%s", name
);
619 options
= xmalloc_open_read_close(opt_filename
, NULL
);
621 replace(options
, '\n', ' ');
622 #if ENABLE_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE
623 if (cmdline_options
) {
624 /* NB: cmdline_options always have one leading ' '
625 * (see main()), we remove it here */
626 char *op
= xasprintf(options
? "%s %s" : "%s %s" + 3,
627 cmdline_options
+ 1, options
);
633 module_load_options
= options
;
634 dbg1_error_msg("process_module('%s'): options:'%s'", name
, options
);
638 /* Scan module directory. This is done only once.
639 * It will attempt module load, and will exit(EXIT_SUCCESS)
642 module_found_idx
= -1;
643 recursive_action(".",
644 ACTION_RECURSE
, /* flags */
645 fileAction
, /* file action */
646 NULL
, /* dir action */
647 name
, /* user data */
650 dbg1_error_msg("dirscan complete");
651 /* Module was not found, or load failed, or is_remove */
652 if (module_found_idx
>= 0) { /* module was found */
653 infovec
= xzalloc(2 * sizeof(infovec
[0]));
654 infovec
[0] = &modinfo
[module_found_idx
];
655 } else { /* search for alias, not a plain module name */
656 infovec
= find_alias(name
);
659 infovec
= find_alias(name
);
663 /* both dirscan and find_alias found nothing */
664 if (!is_remove
&& applet_name
[0] != 'd') /* it wasn't rmmod or depmod */
665 bb_error_msg("module '%s' not found", name
);
666 //TODO: _and_die()? or should we continue (un)loading modules listed on cmdline?
670 /* There can be more than one module for the given alias. For example,
671 * "pci:v00008086d00007010sv00000000sd00000000bc01sc01i80" matches
672 * ata_piix because it has alias "pci:v00008086d00007010sv*sd*bc*sc*i*"
673 * and ata_generic, it has alias "pci:v*d*sv*sd*bc01sc01i*"
674 * Standard modprobe loads them both. We achieve it by returning
675 * a *list* of modinfo pointers from find_alias().
678 /* modprobe -r? unload module(s) */
681 while ((info
= infovec
[infoidx
++]) != NULL
) {
682 int r
= rmmod(bb_get_last_path_component_nostrip(info
->pathname
));
684 goto ret
; /* error */
687 /* modprobe -r: we do not stop here -
688 * continue to unload modules on which the module depends:
689 * "-r --remove: option causes modprobe to remove a module.
690 * If the modules it depends on are also unused, modprobe
691 * will try to remove them, too."
696 while ((info
= infovec
[infoidx
++]) != NULL
) {
697 /* Iterate thru dependencies, trying to (un)load them */
698 deps
= str_2_list(info
->deps
);
699 for (s
= deps
; *s
; s
+= strlen(s
) + 1) {
700 //if (strcmp(name, s) != 0) // N.B. do loops exist?
701 dbg1_error_msg("recurse on dep '%s'", s
);
702 process_module(s
, NULL
);
703 dbg1_error_msg("recurse on dep '%s' done", s
);
710 /* We are modprobe: load it */
711 if (options
&& strstr(options
, "blacklist")) {
712 dbg1_error_msg("'%s': blacklisted", info
->pathname
);
716 if (load_module(info
->pathname
, options
) != 0) {
717 if (EEXIST
!= errno
) {
718 bb_error_msg("'%s': %s",
722 dbg1_error_msg("'%s': %s",
731 //TODO: return load attempt result from process_module.
732 //If dep didn't load ok, continuing makes little sense.
734 #undef cmdline_options
737 /* For reference, module-init-tools v3.4 options:
740 Usage: insmod filename [args]
743 Usage: rmmod [-fhswvV] modulename ...
744 -f (or --force) forces a module unload, and may crash your
745 machine. This requires the Forced Module Removal option
746 when the kernel was compiled.
747 -h (or --help) prints this help text
748 -s (or --syslog) says use syslog, not stderr
749 -v (or --verbose) enables more messages
750 -V (or --version) prints the version code
751 -w (or --wait) begins module removal even if it is used
752 and will stop new users from accessing the module (so it
753 should eventually fall to zero).
756 Usage: modprobe [-v] [-V] [-C config-file] [-n] [-i] [-q] [-b]
757 [-o <modname>] [ --dump-modversions ] <modname> [parameters...]
758 modprobe -r [-n] [-i] [-v] <modulename> ...
759 modprobe -l -t <dirname> [ -a <modulename> ...]
762 depmod 3.4 -- part of module-init-tools
763 depmod -[aA] [-n -e -v -q -V -r -u]
764 [-b basedirectory] [forced_version]
765 depmod [-n -e -v -q -r -u] [-F kernelsyms] module1.ko module2.ko ...
766 If no arguments (except options) are given, "depmod -a" is assumed.
767 depmod will output a dependency list suitable for the modprobe utility.
769 -a, --all Probe all modules
770 -A, --quick Only does the work if there's a new module
771 -n, --show Write the dependency file on stdout only
772 -e, --errsyms Report not supplied symbols
773 -V, --version Print the release version
774 -v, --verbose Enable verbose mode
775 -h, --help Print this usage message
776 The following options are useful for people managing distributions:
778 --basedir basedirectory
779 Use an image of a module tree
781 --filesyms kernelsyms
782 Use the file instead of the current kernel symbols
785 //usage:#if ENABLE_MODPROBE_SMALL
787 //usage:#define depmod_trivial_usage NOUSAGE_STR
788 //usage:#define depmod_full_usage ""
790 //usage:#define lsmod_trivial_usage
792 //usage:#define lsmod_full_usage "\n\n"
793 //usage: "List the currently loaded kernel modules"
795 //usage:#define insmod_trivial_usage
796 //usage: IF_FEATURE_2_4_MODULES("[OPTIONS] MODULE ")
797 //usage: IF_NOT_FEATURE_2_4_MODULES("FILE ")
798 //usage: "[SYMBOL=VALUE]..."
799 //usage:#define insmod_full_usage "\n\n"
800 //usage: "Load kernel module"
801 //usage: IF_FEATURE_2_4_MODULES( "\n"
802 //usage: "\n -f Force module to load into the wrong kernel version"
803 //usage: "\n -k Make module autoclean-able"
804 //usage: "\n -v Verbose"
805 //usage: "\n -q Quiet"
806 //usage: "\n -L Lock: prevent simultaneous loads"
807 //usage: IF_FEATURE_INSMOD_LOAD_MAP(
808 //usage: "\n -m Output load map to stdout"
810 //usage: "\n -x Don't export externs"
813 //usage:#define rmmod_trivial_usage
814 //usage: "[-wfa] [MODULE]..."
815 //usage:#define rmmod_full_usage "\n\n"
816 //usage: "Unload kernel modules\n"
817 //usage: "\n -w Wait until the module is no longer used"
818 //usage: "\n -f Force unload"
819 //usage: "\n -a Remove all unused modules (recursively)"
821 //usage:#define rmmod_example_usage
822 //usage: "$ rmmod tulip\n"
824 //usage:#define modprobe_trivial_usage
825 //usage: "[-qfwrsv] MODULE [SYMBOL=VALUE]..."
826 //usage:#define modprobe_full_usage "\n\n"
827 //usage: " -r Remove MODULE (stacks) or do autoclean"
828 //usage: "\n -q Quiet"
829 //usage: "\n -v Verbose"
830 //usage: "\n -f Force"
831 //usage: "\n -w Wait for unload"
832 //usage: "\n -s Report via syslog instead of stderr"
836 int modprobe_main(int argc
, char **argv
) MAIN_EXTERNALLY_VISIBLE
;
837 int modprobe_main(int argc UNUSED_PARAM
, char **argv
)
840 char applet0
= applet_name
[0];
841 IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(char *options
;)
843 /* are we lsmod? -> just dump /proc/modules */
844 if ('l' == applet0
) {
845 xprint_and_close_file(xfopen_for_read("/proc/modules"));
851 /* Prevent ugly corner cases with no modules at all */
852 modinfo
= xzalloc(sizeof(modinfo
[0]));
854 if ('i' != applet0
) { /* not insmod */
855 /* Goto modules directory */
856 xchdir(CONFIG_DEFAULT_MODULES_DIR
);
858 uname(&uts
); /* never fails */
861 if ('d' == applet0
) {
863 * -n: print result to stdout
864 * -a: process all modules (default)
865 * optional VERSION parameter
867 * -A: do work only if a module is newer than depfile
868 * -e: report any symbols which a module needs
869 * which are not supplied by other modules or the kernel
870 * -F FILE: System.map (symbols for -e)
873 * -b BASEDIR: (TODO!) modules are in
874 * $BASEDIR/lib/modules/$VERSION
875 * -v: human readable deps to stdout
876 * -V: version (don't want to support it - people may depend
877 * on it as an indicator of "standard" depmod)
878 * -h: help (well duh)
879 * module1.o module2.o parameters (just ignored for now)
881 getopt32(argv
, "na" "AeF:qru" /* "b:vV", NULL */, NULL
);
883 /* if (argv[0] && argv[1]) bb_show_usage(); */
884 /* Goto $VERSION directory */
885 xchdir(argv
[0] ? argv
[0] : uts
.release
);
886 /* Force full module scan by asking to find a bogus module.
887 * This will generate modules.dep.bb as a side effect. */
888 process_module((char*)"/", NULL
);
889 return !wrote_dep_bb_ok
;
892 /* insmod, modprobe, rmmod require at least one argument */
893 opt_complementary
= "-1";
894 /* only -q (quiet) and -r (rmmod),
895 * the rest are accepted and ignored (compat) */
896 getopt32(argv
, "qrfsvwb");
899 /* are we rmmod? -> simulate modprobe -r */
900 if ('r' == applet0
) {
901 option_mask32
|= OPT_r
;
904 if ('i' != applet0
) { /* not insmod */
905 /* Goto $VERSION directory */
909 #if ENABLE_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE
910 /* If not rmmod/-r, parse possible module options given on command line.
911 * insmod/modprobe takes one module name, the rest are parameters. */
913 if (!(option_mask32
& OPT_r
)) {
916 /* Enclose options in quotes */
918 options
= xasprintf("%s \"%s\"", s
? s
: "", *arg
);
924 if (!(option_mask32
& OPT_r
))
928 if ('i' == applet0
) { /* insmod */
932 len
= MAXINT(ssize_t
);
933 map
= xmalloc_open_zipped_read_close(*argv
, &len
);
935 bb_perror_msg_and_die("can't read '%s'", *argv
);
936 if (init_module(map
, len
,
937 IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(options
? options
: "")
938 IF_NOT_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE("")
941 bb_error_msg_and_die("can't insert '%s': %s",
942 *argv
, moderror(errno
));
947 /* Try to load modprobe.dep.bb */
948 if ('r' != applet0
) /* not rmmod */
951 /* Load/remove modules.
952 * Only rmmod/modprobe -r loops here, insmod/modprobe has only argv[0] */
954 process_module(*argv
, options
);
957 if (ENABLE_FEATURE_CLEAN_UP
) {
958 IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(free(options
);)