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-rw-r--r--busybox/modutils/lsmod.c174
1 files changed, 174 insertions, 0 deletions
diff --git a/busybox/modutils/lsmod.c b/busybox/modutils/lsmod.c
new file mode 100644
index 000000000..7bf314afe
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+++ b/busybox/modutils/lsmod.c
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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 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 *
25 */
26
27#include <stdlib.h>
28#include <stdio.h>
29#include <string.h>
30#include <stddef.h>
31#include <errno.h>
32#include <unistd.h>
33#include <dirent.h>
34#include <ctype.h>
35#include <assert.h>
36#include <getopt.h>
37#include <sys/utsname.h>
38#include <sys/file.h>
39#include "busybox.h"
40
41
42#ifndef CONFIG_FEATURE_CHECK_TAINTED_MODULE
43static inline void check_tainted(void) { printf("\n"); }
44#else
45#define TAINT_FILENAME "/proc/sys/kernel/tainted"
46#define TAINT_PROPRIETORY_MODULE (1<<0)
47#define TAINT_FORCED_MODULE (1<<1)
48#define TAINT_UNSAFE_SMP (1<<2)
49
50static void check_tainted(void)
51{
52 int tainted;
53 FILE *f;
54
55 tainted = 0;
56 if ((f = fopen(TAINT_FILENAME, "r"))) {
57 fscanf(f, "%d", &tainted);
58 fclose(f);
59 }
60 if (f && tainted) {
61 printf(" Tainted: %c%c%c\n",
62 tainted & TAINT_PROPRIETORY_MODULE ? 'P' : 'G',
63 tainted & TAINT_FORCED_MODULE ? 'F' : ' ',
64 tainted & TAINT_UNSAFE_SMP ? 'S' : ' ');
65 }
66 else {
67 printf(" Not tainted\n");
68 }
69}
70#endif
71
72#ifdef CONFIG_FEATURE_QUERY_MODULE_INTERFACE
73
74struct module_info
75{
76 unsigned long addr;
77 unsigned long size;
78 unsigned long flags;
79 long usecount;
80};
81
82
83int query_module(const char *name, int which, void *buf, size_t bufsize, size_t *ret);
84
85/* Values for query_module's which. */
86static const int QM_MODULES = 1;
87static const int QM_DEPS = 2;
88static const int QM_REFS = 3;
89static const int QM_SYMBOLS = 4;
90static const int QM_INFO = 5;
91
92/* Bits of module.flags. */
93static const int NEW_MOD_RUNNING = 1;
94static const int NEW_MOD_DELETED = 2;
95static const int NEW_MOD_AUTOCLEAN = 4;
96static const int NEW_MOD_VISITED = 8;
97static const int NEW_MOD_USED_ONCE = 16;
98static const int NEW_MOD_INITIALIZING = 64;
99
100extern int lsmod_main(int argc, char **argv)
101{
102 struct module_info info;
103 char *module_names, *mn, *deps, *dn;
104 size_t bufsize, depsize, nmod, count, i, j;
105
106 module_names = xmalloc(bufsize = 256);
107 if (my_query_module(NULL, QM_MODULES, (void **)&module_names, &bufsize,
108 &nmod)) {
109 bb_perror_msg_and_die("QM_MODULES");
110 }
111
112 deps = xmalloc(depsize = 256);
113 printf("Module Size Used by");
114 check_tainted();
115
116 for (i = 0, mn = module_names; i < nmod; mn += strlen(mn) + 1, i++) {
117 if (query_module(mn, QM_INFO, &info, sizeof(info), &count)) {
118 if (errno == ENOENT) {
119 /* The module was removed out from underneath us. */
120 continue;
121 }
122 /* else choke */
123 bb_perror_msg_and_die("module %s: QM_INFO", mn);
124 }
125 if (my_query_module(mn, QM_REFS, (void **)&deps, &depsize, &count)) {
126 if (errno == ENOENT) {
127 /* The module was removed out from underneath us. */
128 continue;
129 }
130 bb_perror_msg_and_die("module %s: QM_REFS", mn);
131 }
132 printf("%-20s%8lu%4ld", mn, info.size, info.usecount);
133 if (info.flags & NEW_MOD_DELETED)
134 printf(" (deleted)");
135 else if (info.flags & NEW_MOD_INITIALIZING)
136 printf(" (initializing)");
137 else if (!(info.flags & NEW_MOD_RUNNING))
138 printf(" (uninitialized)");
139 else {
140 if (info.flags & NEW_MOD_AUTOCLEAN)
141 printf(" (autoclean) ");
142 if (!(info.flags & NEW_MOD_USED_ONCE))
143 printf(" (unused)");
144 }
145 if (count) printf(" [");
146 for (j = 0, dn = deps; j < count; dn += strlen(dn) + 1, j++) {
147 printf("%s%s", dn, (j==count-1)? "":" ");
148 }
149 if (count) printf("]");
150
151 printf("\n");
152 }
153
154#ifdef CONFIG_FEATURE_CLEAN_UP
155 free(module_names);
156#endif
157
158 return( 0);
159}
160
161#else /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */
162
163extern int lsmod_main(int argc, char **argv)
164{
165 printf("Module Size Used by");
166 check_tainted();
167
168 if (bb_xprint_file_by_name("/proc/modules") < 0) {
169 return 0;
170 }
171 return 1;
172}
173
174#endif /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */
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