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"
16 //config: select PLATFORM_LINUX
18 //config: Show information about a Linux Kernel module
21 #include <sys/utsname.h> /* uname() */
27 OPT_TAGS
= (1 << 12) - 1, /* shortcut count */
28 OPT_F
= (1 << 12), /* field name */
29 OPT_0
= (1 << 13), /* \0 as separator */
37 static int display(const char *data
, const char *pattern
, int flag
)
40 int n
= printf("%s:", pattern
);
44 return printf("%s%c", data
, (option_mask32
& OPT_0
) ? '\0' : '\n');
47 static void modinfo(const char *path
, const char *version
,
48 const struct modinfo_env
*env
)
50 static const char *const shortcuts
[] = {
66 char *ptr
, *the_module
;
67 const char *field
= env
->field
;
70 if (tags
& 1) { /* filename */
71 display(path
, shortcuts
[0], 1 != tags
);
74 len
= MAXINT(ssize_t
);
75 the_module
= xmalloc_open_zipped_read_close(path
, &len
);
79 /* Newer depmod puts relative paths in modules.dep */
80 path
= xasprintf("%s/%s/%s", CONFIG_DEFAULT_MODULES_DIR
, version
, path
);
81 the_module
= xmalloc_open_zipped_read_close(path
, &len
);
89 for (j
= 1; (1<<j
) & (OPT_TAGS
+ OPT_F
); j
++) {
95 if ((1<<j
) & OPT_TAGS
)
96 pattern
= shortcuts
[j
];
97 length
= strlen(pattern
);
100 ptr
= memchr(ptr
, *pattern
, len
- (ptr
- (char*)the_module
));
101 if (ptr
== NULL
) /* no occurance left, done */
103 if (strncmp(ptr
, pattern
, length
) == 0 && ptr
[length
] == '=') {
104 /* field prefixes are 0x80 or 0x00 */
105 if ((ptr
[-1] & 0x7F) == '\0') {
107 ptr
+= display(ptr
, pattern
, (1<<j
) != tags
);
116 //usage:#define modinfo_trivial_usage
117 //usage: "[-adlp0] [-F keyword] MODULE"
118 //usage:#define modinfo_full_usage "\n\n"
119 //usage: " -a Shortcut for '-F author'"
120 //usage: "\n -d Shortcut for '-F description'"
121 //usage: "\n -l Shortcut for '-F license'"
122 //usage: "\n -p Shortcut for '-F parm'"
123 //usage: "\n -F keyword Keyword to look for"
124 //usage: "\n -0 Separate output with NULs"
125 //usage:#define modinfo_example_usage
126 //usage: "$ modinfo -F vermagic loop\n"
128 int modinfo_main(int argc
, char **argv
) MAIN_EXTERNALLY_VISIBLE
;
129 int modinfo_main(int argc UNUSED_PARAM
, char **argv
)
131 struct modinfo_env env
;
132 char name
[MODULE_NAME_LEN
];
135 char *colon
, *tokens
[2];
140 opt_complementary
= "-1"; /* minimum one param */
141 opts
= getopt32(argv
, "nladvAsDumpF:0", &env
.field
);
142 env
.tags
= opts
& OPT_TAGS
? opts
& OPT_TAGS
: OPT_TAGS
;
146 parser
= config_open2(
147 xasprintf("%s/%s/%s", CONFIG_DEFAULT_MODULES_DIR
, uts
.release
, CONFIG_DEFAULT_DEPMOD_FILE
),
151 while (config_read(parser
, tokens
, 2, 1, "# \t", PARSE_NORMAL
)) {
152 colon
= last_char_is(tokens
[0], ':');
156 filename2modname(tokens
[0], name
);
157 for (i
= 0; argv
[i
]; i
++) {
158 if (fnmatch(argv
[i
], name
, 0) == 0) {
159 modinfo(tokens
[0], uts
.release
, &env
);
160 argv
[i
] = (char *) "";
164 if (ENABLE_FEATURE_CLEAN_UP
)
165 config_close(parser
);
167 for (i
= 0; argv
[i
]; i
++) {
169 modinfo(argv
[i
], uts
.release
, &env
);