aboutsummaryrefslogtreecommitdiff
path: root/modutils/lsmod.c
diff options
context:
space:
mode:
Diffstat (limited to 'modutils/lsmod.c')
-rw-r--r--modutils/lsmod.c188
1 files changed, 188 insertions, 0 deletions
diff --git a/modutils/lsmod.c b/modutils/lsmod.c
new file mode 100644
index 000000000..ffde3d829
--- /dev/null
+++ b/modutils/lsmod.c
@@ -0,0 +1,188 @@
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 *
7 * Modified by Alcove, Julien Gaulmin <julien.gaulmin@alcove.fr> and
8 * Nicolas Ferre <nicolas.ferre@alcove.fr> to support pre 2.1 kernels
9 * (which lack the query_module() interface).
10 *
11 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
12 */
13
14#include "busybox.h"
15
16
17#ifndef CONFIG_FEATURE_CHECK_TAINTED_MODULE
18static void check_tainted(void) { puts(""); }
19#else
20#define TAINT_FILENAME "/proc/sys/kernel/tainted"
21#define TAINT_PROPRIETORY_MODULE (1<<0)
22#define TAINT_FORCED_MODULE (1<<1)
23#define TAINT_UNSAFE_SMP (1<<2)
24
25static void check_tainted(void)
26{
27 int tainted;
28 FILE *f;
29
30 tainted = 0;
31 if ((f = fopen(TAINT_FILENAME, "r"))) {
32 fscanf(f, "%d", &tainted);
33 fclose(f);
34 }
35 if (f && tainted) {
36 printf(" Tainted: %c%c%c\n",
37 tainted & TAINT_PROPRIETORY_MODULE ? 'P' : 'G',
38 tainted & TAINT_FORCED_MODULE ? 'F' : ' ',
39 tainted & TAINT_UNSAFE_SMP ? 'S' : ' ');
40 }
41 else {
42 printf(" Not tainted\n");
43 }
44}
45#endif
46
47#ifdef CONFIG_FEATURE_QUERY_MODULE_INTERFACE
48
49struct module_info
50{
51 unsigned long addr;
52 unsigned long size;
53 unsigned long flags;
54 long usecount;
55};
56
57
58int query_module(const char *name, int which, void *buf, size_t bufsize, size_t *ret);
59
60enum {
61/* Values for query_module's which. */
62 QM_MODULES = 1,
63 QM_DEPS = 2,
64 QM_REFS = 3,
65 QM_SYMBOLS = 4,
66 QM_INFO = 5,
67
68/* Bits of module.flags. */
69 NEW_MOD_RUNNING = 1,
70 NEW_MOD_DELETED = 2,
71 NEW_MOD_AUTOCLEAN = 4,
72 NEW_MOD_VISITED = 8,
73 NEW_MOD_USED_ONCE = 16,
74 NEW_MOD_INITIALIZING = 64
75};
76
77int lsmod_main(int argc, char **argv)
78{
79 struct module_info info;
80 char *module_names, *mn, *deps, *dn;
81 size_t bufsize, depsize, nmod, count, i, j;
82
83 module_names = deps = NULL;
84 bufsize = depsize = 0;
85 while(query_module(NULL, QM_MODULES, module_names, bufsize, &nmod)) {
86 if (errno != ENOSPC) bb_perror_msg_and_die("QM_MODULES");
87 module_names = xmalloc(bufsize = nmod);
88 }
89
90 deps = xmalloc(depsize = 256);
91 printf("Module\t\t\tSize Used by");
92 check_tainted();
93
94 for (i = 0, mn = module_names; i < nmod; mn += strlen(mn) + 1, i++) {
95 if (query_module(mn, QM_INFO, &info, sizeof(info), &count)) {
96 if (errno == ENOENT) {
97 /* The module was removed out from underneath us. */
98 continue;
99 }
100 /* else choke */
101 bb_perror_msg_and_die("module %s: QM_INFO", mn);
102 }
103 while (query_module(mn, QM_REFS, deps, depsize, &count)) {
104 if (errno == ENOENT) {
105 /* The module was removed out from underneath us. */
106 continue;
107 } else if (errno != ENOSPC)
108 bb_perror_msg_and_die("module %s: QM_REFS", mn);
109 deps = xrealloc(deps, count);
110 }
111 printf("%-20s%8lu%4ld", mn, info.size, info.usecount);
112 if (info.flags & NEW_MOD_DELETED)
113 printf(" (deleted)");
114 else if (info.flags & NEW_MOD_INITIALIZING)
115 printf(" (initializing)");
116 else if (!(info.flags & NEW_MOD_RUNNING))
117 printf(" (uninitialized)");
118 else {
119 if (info.flags & NEW_MOD_AUTOCLEAN)
120 printf(" (autoclean) ");
121 if (!(info.flags & NEW_MOD_USED_ONCE))
122 printf(" (unused)");
123 }
124 if (count) printf(" [");
125 for (j = 0, dn = deps; j < count; dn += strlen(dn) + 1, j++) {
126 printf("%s%s", dn, (j==count-1)? "":" ");
127 }
128 if (count) printf("]");
129
130 puts("");
131 }
132
133#ifdef CONFIG_FEATURE_CLEAN_UP
134 free(module_names);
135#endif
136
137 return 0;
138}
139
140#else /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */
141
142int lsmod_main(int argc, char **argv)
143{
144 FILE *file = xfopen("/proc/modules", "r");
145
146 printf("Module Size Used by");
147 check_tainted();
148#if defined(CONFIG_FEATURE_LSMOD_PRETTY_2_6_OUTPUT)
149 {
150 char *line;
151 while ((line = xmalloc_fgets(file)) != NULL) {
152 char *tok;
153
154 tok = strtok(line, " \t");
155 printf("%-19s", tok);
156 tok = strtok(NULL, " \t\n");
157 printf(" %8s", tok);
158 tok = strtok(NULL, " \t\n");
159 /* Null if no module unloading support. */
160 if (tok) {
161 printf(" %s", tok);
162 tok = strtok(NULL, "\n");
163 if (!tok)
164 tok = "";
165 /* New-style has commas, or -. If so,
166 truncate (other fields might follow). */
167 else if (strchr(tok, ',')) {
168 tok = strtok(tok, "\t ");
169 /* Strip trailing comma. */
170 if (tok[strlen(tok)-1] == ',')
171 tok[strlen(tok)-1] = '\0';
172 } else if (tok[0] == '-'
173 && (tok[1] == '\0' || isspace(tok[1])))
174 tok = "";
175 printf(" %s", tok);
176 }
177 puts("");
178 free(line);
179 }
180 fclose(file);
181 }
182#else
183 xprint_and_close_file(file);
184#endif /* CONFIG_FEATURE_2_6_MODULES */
185 return EXIT_SUCCESS;
186}
187
188#endif /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */