1 /* vi: set sw=4 ts=4: */
2 /*
3 * Mini lsmod implementation for busybox
4 *
5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
6 * Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com>
7 *
8 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
9 */
10 //config:config LSMOD
11 //config: bool "lsmod (1.9 kb)"
12 //config: default y
13 //config: help
14 //config: lsmod is used to display a list of loaded modules.
15 //config:
16 //config:config FEATURE_LSMOD_PRETTY_2_6_OUTPUT
17 //config: bool "Pretty output"
18 //config: default y
19 //config: depends on LSMOD && !MODPROBE_SMALL
20 //config: help
21 //config: This option makes output format of lsmod adjusted to
22 //config: the format of module-init-tools for Linux kernel 2.6.
23 //config: Increases size somewhat.
24
25 //applet:IF_LSMOD(IF_NOT_MODPROBE_SMALL(APPLET_NOEXEC(lsmod, lsmod, BB_DIR_SBIN, BB_SUID_DROP, lsmod)))
26
27 //kbuild:ifneq ($(CONFIG_MODPROBE_SMALL),y)
28 //kbuild:lib-$(CONFIG_LSMOD) += lsmod.o modutils.o
29 //kbuild:endif
30
31 //usage:#if !ENABLE_MODPROBE_SMALL
32 //usage:#define lsmod_trivial_usage
33 //usage: ""
34 //usage:#define lsmod_full_usage "\n\n"
35 //usage: "List loaded kernel modules"
36 //usage:#endif
37
38 #include "libbb.h"
39 #include "unicode.h"
40
41 #if ENABLE_FEATURE_CHECK_TAINTED_MODULE
42 enum {
43 TAINT_PROPRIETORY_MODULE = (1 << 0),
44 TAINT_FORCED_MODULE = (1 << 1),
45 TAINT_UNSAFE_SMP = (1 << 2),
46 };
47
check_tainted(void)48 static void check_tainted(void)
49 {
50 int tainted = 0;
51 char *buf = xmalloc_open_read_close("/proc/sys/kernel/tainted", NULL);
52 if (buf) {
53 tainted = atoi(buf);
54 if (ENABLE_FEATURE_CLEAN_UP)
55 free(buf);
56 }
57
58 if (tainted) {
59 printf(" Tainted: %c%c%c\n",
60 tainted & TAINT_PROPRIETORY_MODULE ? 'P' : 'G',
61 tainted & TAINT_FORCED_MODULE ? 'F' : ' ',
62 tainted & TAINT_UNSAFE_SMP ? 'S' : ' ');
63 } else {
64 puts(" Not tainted");
65 }
66 }
67 #else
check_tainted(void)68 static ALWAYS_INLINE void check_tainted(void)
69 {
70 putchar('\n');
71 }
72 #endif
73
74 int lsmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
lsmod_main(int argc UNUSED_PARAM,char ** argv UNUSED_PARAM)75 int lsmod_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
76 {
77 #if ENABLE_FEATURE_LSMOD_PRETTY_2_6_OUTPUT
78 char *token[4];
79 parser_t *parser = config_open("/proc/modules");
80 init_unicode();
81
82 printf("%-24sSize Used by", "Module");
83 check_tainted();
84
85 if (ENABLE_FEATURE_2_4_MODULES
86 && get_linux_version_code() < KERNEL_VERSION(2,6,0)
87 ) {
88 while (config_read(parser, token, 4, 3, "# \t", PARSE_NORMAL)) {
89 if (token[3] != NULL && token[3][0] == '[') {
90 token[3]++;
91 token[3][strlen(token[3])-1] = '\0';
92 } else
93 token[3] = (char *) "";
94 # if ENABLE_UNICODE_SUPPORT
95 {
96 uni_stat_t uni_stat;
97 char *uni_name = unicode_conv_to_printable(&uni_stat, token[0]);
98 unsigned pad_len = (uni_stat.unicode_width > 19) ? 0 : 19 - uni_stat.unicode_width;
99 printf("%s%*s %8s %2s %s\n", uni_name, pad_len, "", token[1], token[2], token[3]);
100 free(uni_name);
101 }
102 # else
103 printf("%-19s %8s %2s %s\n", token[0], token[1], token[2], token[3]);
104 # endif
105 }
106 } else {
107 while (config_read(parser, token, 4, 4, "# \t", PARSE_NORMAL & ~PARSE_GREEDY)) {
108 // N.B. token[3] is either '-' (module is not used by others)
109 // or comma-separated list ended by comma
110 // so trimming the trailing char is just what we need!
111 if (token[3][0])
112 token[3][strlen(token[3]) - 1] = '\0';
113 # if ENABLE_UNICODE_SUPPORT
114 {
115 uni_stat_t uni_stat;
116 char *uni_name = unicode_conv_to_printable(&uni_stat, token[0]);
117 unsigned pad_len = (uni_stat.unicode_width > 19) ? 0 : 19 - uni_stat.unicode_width;
118 printf("%s%*s %8s %2s %s\n", uni_name, pad_len, "", token[1], token[2], token[3]);
119 free(uni_name);
120 }
121 # else
122 printf("%-19s %8s %2s %s\n", token[0], token[1], token[2], token[3]);
123 # endif
124 }
125 }
126 if (ENABLE_FEATURE_CLEAN_UP)
127 config_close(parser);
128 #else
129 check_tainted();
130 xprint_and_close_file(xfopen_for_read("/proc/modules"));
131 #endif
132 return EXIT_SUCCESS;
133 }
134