1 /* vi: set sw=4 ts=4: */
3 * modinfo - retrieve module info
4 * Copyright (c) 2008 Pascal Bellard
6 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
9 //applet:IF_MODINFO(APPLET(modinfo, _BB_DIR_SBIN, _BB_SUID_DROP))
11 //kbuild:lib-$(CONFIG_MODINFO) += modinfo.o modutils.o
13 //config:config MODINFO
14 //config: bool "modinfo"
17 //config: Show information about a Linux Kernel module
20 #include <sys/utsname.h> /* uname() */
26 OPT_TAGS = (1 << 6) - 1,
27 OPT_F = (1 << 6), /* field name */
28 OPT_0 = (1 << 7), /* \0 as separator */
36 static int display(const char *data, const char *pattern, int flag)
39 int n = printf("%s:", pattern);
43 return printf("%s%c", data, (option_mask32 & OPT_0) ? '\0' : '\n');
46 static void modinfo(const char *path, const char *version,
47 struct modinfo_env *env)
49 static const char *const shortcuts[] = {
59 char *ptr, *the_module;
60 const char *field = env->field;
63 if (tags & 1) { /* filename */
64 display(path, shortcuts[0], 1 != tags);
67 len = MAXINT(ssize_t);
68 the_module = xmalloc_open_zipped_read_close(path, &len);
72 /* Newer depmod puts relative paths in modules.dep */
73 path = xasprintf("%s/%s/%s", CONFIG_DEFAULT_MODULES_DIR, version, path);
74 the_module = xmalloc_open_zipped_read_close(path, &len);
82 for (j = 1; (1<<j) & (OPT_TAGS + OPT_F); j++) {
83 const char *pattern = field;
84 if ((1<<j) & OPT_TAGS)
85 pattern = shortcuts[j];
88 length = strlen(pattern);
91 ptr = memchr(ptr, *pattern, len - (ptr - (char*)the_module));
92 if (ptr == NULL) /* no occurance left, done */
94 if (strncmp(ptr, pattern, length) == 0 && ptr[length] == '=') {
96 ptr += display(ptr, pattern, (1<<j) != tags);
104 //usage:#define modinfo_trivial_usage
105 //usage: "[-adlp0] [-F keyword] MODULE"
106 //usage:#define modinfo_full_usage "\n\n"
108 //usage: "\n -a Shortcut for '-F author'"
109 //usage: "\n -d Shortcut for '-F description'"
110 //usage: "\n -l Shortcut for '-F license'"
111 //usage: "\n -p Shortcut for '-F parm'"
112 //usage: "\n -F keyword Keyword to look for"
113 //usage: "\n -0 Separate output with NULs"
114 //usage:#define modinfo_example_usage
115 //usage: "$ modinfo -F vermagic loop\n"
117 int modinfo_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
118 int modinfo_main(int argc UNUSED_PARAM, char **argv)
120 struct modinfo_env env;
121 char name[MODULE_NAME_LEN];
124 char *colon, *tokens[2];
129 opt_complementary = "-1"; /* minimum one param */
130 opts = getopt32(argv, "fdalvpF:0", &env.field);
131 env.tags = opts & OPT_TAGS ? opts & OPT_TAGS : OPT_TAGS;
135 parser = config_open2(
136 xasprintf("%s/%s/%s", CONFIG_DEFAULT_MODULES_DIR, uts.release, CONFIG_DEFAULT_DEPMOD_FILE),
140 while (config_read(parser, tokens, 2, 1, "# \t", PARSE_NORMAL)) {
141 colon = last_char_is(tokens[0], ':');
145 filename2modname(tokens[0], name);
146 for (i = 0; argv[i]; i++) {
147 if (fnmatch(argv[i], name, 0) == 0) {
148 modinfo(tokens[0], uts.release, &env);
149 argv[i] = (char *) "";
153 if (ENABLE_FEATURE_CLEAN_UP)
154 config_close(parser);
156 for (i = 0; argv[i]; i++) {
158 modinfo(argv[i], uts.release, &env);