blob: 09b03d029c72e347ba2fd0bb7626891e035b4b82 [file] [log] [blame]
Erik Andersene49d5ec2000-02-08 19:58:47 +00001/* vi: set sw=4 ts=4: */
Erik Andersen6f23cec1999-12-15 22:14:12 +00002/*
3 * Mini lsmod implementation for busybox
4 *
Eric Andersenc7bda1c2004-03-15 08:29:22 +00005 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
Erik Andersen6f23cec1999-12-15 22:14:12 +00006 *
Eric Andersen21adca72000-12-06 18:18:26 +00007 * 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 *
Bernhard Reutner-Fischerdeda6a52006-06-03 19:35:15 +000011 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
Erik Andersen6f23cec1999-12-15 22:14:12 +000012 */
13
Denis Vlasenkob6adbf12007-05-26 19:00:18 +000014#include "libbb.h"
Eric Andersenbe0dc0d2000-08-21 19:25:16 +000015
16
Denis Vlasenkoe3241842007-08-13 10:36:25 +000017#if !ENABLE_FEATURE_CHECK_TAINTED_MODULE
Denis Vlasenko4daad902007-09-27 10:20:47 +000018static void check_tainted(void) { bb_putchar('\n'); }
Eric Andersen71ae64b2002-10-10 04:20:21 +000019#else
Eric Andersen166fa462002-09-16 05:30:24 +000020#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
Eric Andersen71ae64b2002-10-10 04:20:21 +000025static void check_tainted(void)
Eric Andersen166fa462002-09-16 05:30:24 +000026{
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) {
Eric Andersen52864942002-10-08 09:38:07 +000036 printf(" Tainted: %c%c%c\n",
Eric Andersen166fa462002-09-16 05:30:24 +000037 tainted & TAINT_PROPRIETORY_MODULE ? 'P' : 'G',
38 tainted & TAINT_FORCED_MODULE ? 'F' : ' ',
39 tainted & TAINT_UNSAFE_SMP ? 'S' : ' ');
40 }
41 else {
Eric Andersen52864942002-10-08 09:38:07 +000042 printf(" Not tainted\n");
Eric Andersen166fa462002-09-16 05:30:24 +000043 }
44}
Eric Andersen71ae64b2002-10-10 04:20:21 +000045#endif
Eric Andersen166fa462002-09-16 05:30:24 +000046
Denis Vlasenkoe3241842007-08-13 10:36:25 +000047#if ENABLE_FEATURE_QUERY_MODULE_INTERFACE
Eric Andersen21adca72000-12-06 18:18:26 +000048
Eric Andersenbe0dc0d2000-08-21 19:25:16 +000049struct module_info
50{
51 unsigned long addr;
52 unsigned long size;
53 unsigned long flags;
54 long usecount;
55};
56
57
Eric Andersene76c3b02001-04-05 03:14:39 +000058int query_module(const char *name, int which, void *buf, size_t bufsize, size_t *ret);
Eric Andersenbe0dc0d2000-08-21 19:25:16 +000059
Rob Landleybc68cd12006-03-10 19:22:06 +000060enum {
Eric Andersenbe0dc0d2000-08-21 19:25:16 +000061/* Values for query_module's which. */
Rob Landleybc68cd12006-03-10 19:22:06 +000062 QM_MODULES = 1,
63 QM_DEPS = 2,
64 QM_REFS = 3,
65 QM_SYMBOLS = 4,
66 QM_INFO = 5,
Eric Andersenbe0dc0d2000-08-21 19:25:16 +000067
Eric Andersende34e432000-09-10 16:16:00 +000068/* Bits of module.flags. */
Rob Landleybc68cd12006-03-10 19:22:06 +000069 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};
Erik Andersen6f23cec1999-12-15 22:14:12 +000076
Denis Vlasenko06af2162007-02-03 17:28:39 +000077int lsmod_main(int argc, char **argv);
Rob Landleydfba7412006-03-06 20:47:33 +000078int lsmod_main(int argc, char **argv)
Erik Andersen6f23cec1999-12-15 22:14:12 +000079{
Eric Andersenbe0dc0d2000-08-21 19:25:16 +000080 struct module_info info;
81 char *module_names, *mn, *deps, *dn;
Matt Kraai0f50bca2001-04-13 14:40:15 +000082 size_t bufsize, depsize, nmod, count, i, j;
Erik Andersene49d5ec2000-02-08 19:58:47 +000083
Rob Landleyabfe1072006-08-28 19:40:08 +000084 module_names = deps = NULL;
85 bufsize = depsize = 0;
Denis Vlasenkobf0a2012006-12-26 10:42:51 +000086 while (query_module(NULL, QM_MODULES, module_names, bufsize, &nmod)) {
Rob Landleyabfe1072006-08-28 19:40:08 +000087 if (errno != ENOSPC) bb_perror_msg_and_die("QM_MODULES");
88 module_names = xmalloc(bufsize = nmod);
Eric Andersenbe0dc0d2000-08-21 19:25:16 +000089 }
90
Matt Kraai0f50bca2001-04-13 14:40:15 +000091 deps = xmalloc(depsize = 256);
Rob Landleyabfe1072006-08-28 19:40:08 +000092 printf("Module\t\t\tSize Used by");
Eric Andersen166fa462002-09-16 05:30:24 +000093 check_tainted();
Eric Andersen166fa462002-09-16 05:30:24 +000094
Eric Andersenbe0dc0d2000-08-21 19:25:16 +000095 for (i = 0, mn = module_names; i < nmod; mn += strlen(mn) + 1, i++) {
96 if (query_module(mn, QM_INFO, &info, sizeof(info), &count)) {
97 if (errno == ENOENT) {
98 /* The module was removed out from underneath us. */
99 continue;
100 }
101 /* else choke */
Manuel Novoa III cad53642003-03-19 09:13:01 +0000102 bb_perror_msg_and_die("module %s: QM_INFO", mn);
Eric Andersenbe0dc0d2000-08-21 19:25:16 +0000103 }
Rob Landleyabfe1072006-08-28 19:40:08 +0000104 while (query_module(mn, QM_REFS, deps, depsize, &count)) {
Eric Andersenbe0dc0d2000-08-21 19:25:16 +0000105 if (errno == ENOENT) {
106 /* The module was removed out from underneath us. */
107 continue;
Denis Vlasenko9213a9e2006-09-17 16:28:10 +0000108 } else if (errno != ENOSPC)
Rob Landleyabfe1072006-08-28 19:40:08 +0000109 bb_perror_msg_and_die("module %s: QM_REFS", mn);
110 deps = xrealloc(deps, count);
Eric Andersenbe0dc0d2000-08-21 19:25:16 +0000111 }
Eric Andersen31f97472002-10-18 22:14:07 +0000112 printf("%-20s%8lu%4ld", mn, info.size, info.usecount);
Eric Andersende34e432000-09-10 16:16:00 +0000113 if (info.flags & NEW_MOD_DELETED)
Eric Andersen31f97472002-10-18 22:14:07 +0000114 printf(" (deleted)");
Eric Andersende34e432000-09-10 16:16:00 +0000115 else if (info.flags & NEW_MOD_INITIALIZING)
Eric Andersen31f97472002-10-18 22:14:07 +0000116 printf(" (initializing)");
Eric Andersende34e432000-09-10 16:16:00 +0000117 else if (!(info.flags & NEW_MOD_RUNNING))
Eric Andersen31f97472002-10-18 22:14:07 +0000118 printf(" (uninitialized)");
Eric Andersende34e432000-09-10 16:16:00 +0000119 else {
120 if (info.flags & NEW_MOD_AUTOCLEAN)
Eric Andersen31f97472002-10-18 22:14:07 +0000121 printf(" (autoclean) ");
Eric Andersende34e432000-09-10 16:16:00 +0000122 if (!(info.flags & NEW_MOD_USED_ONCE))
Eric Andersen31f97472002-10-18 22:14:07 +0000123 printf(" (unused)");
Eric Andersende34e432000-09-10 16:16:00 +0000124 }
Eric Andersen31f97472002-10-18 22:14:07 +0000125 if (count) printf(" [");
Eric Andersenafeb9652001-02-24 19:51:54 +0000126 for (j = 0, dn = deps; j < count; dn += strlen(dn) + 1, j++) {
127 printf("%s%s", dn, (j==count-1)? "":" ");
128 }
Eric Andersen31f97472002-10-18 22:14:07 +0000129 if (count) printf("]");
Eric Andersenafeb9652001-02-24 19:51:54 +0000130
Denis Vlasenko4daad902007-09-27 10:20:47 +0000131 bb_putchar('\n');
Eric Andersenbe0dc0d2000-08-21 19:25:16 +0000132 }
133
Denis Vlasenkoe3241842007-08-13 10:36:25 +0000134#if ENABLE_FEATURE_CLEAN_UP
Tim Riker6fe19602002-12-13 22:59:15 +0000135 free(module_names);
136#endif
Eric Andersenbe0dc0d2000-08-21 19:25:16 +0000137
Denis Vlasenko079f8af2006-11-27 16:49:31 +0000138 return 0;
Erik Andersen6f23cec1999-12-15 22:14:12 +0000139}
Eric Andersen21adca72000-12-06 18:18:26 +0000140
Eric Andersen71ae64b2002-10-10 04:20:21 +0000141#else /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */
Eric Andersen21adca72000-12-06 18:18:26 +0000142
Denis Vlasenko06af2162007-02-03 17:28:39 +0000143int lsmod_main(int argc, char **argv);
Rob Landleydfba7412006-03-06 20:47:33 +0000144int lsmod_main(int argc, char **argv)
Eric Andersen21adca72000-12-06 18:18:26 +0000145{
Rob Landley86b4d642006-08-03 17:58:17 +0000146 FILE *file = xfopen("/proc/modules", "r");
147
Eric Andersen166fa462002-09-16 05:30:24 +0000148 printf("Module Size Used by");
149 check_tainted();
Rob Landley4f653602005-05-04 23:55:06 +0000150#if defined(CONFIG_FEATURE_LSMOD_PRETTY_2_6_OUTPUT)
Rob Landley627814b2005-05-03 22:34:03 +0000151 {
Denis Vlasenkoea620772006-10-14 02:23:43 +0000152 char *line;
153 while ((line = xmalloc_fgets(file)) != NULL) {
Denis Vlasenko55a99402006-09-30 20:41:44 +0000154 char *tok;
Tim Rikerc1ef7bd2006-01-25 00:08:53 +0000155
Denis Vlasenko55a99402006-09-30 20:41:44 +0000156 tok = strtok(line, " \t");
157 printf("%-19s", tok);
158 tok = strtok(NULL, " \t\n");
159 printf(" %8s", tok);
160 tok = strtok(NULL, " \t\n");
161 /* Null if no module unloading support. */
162 if (tok) {
163 printf(" %s", tok);
164 tok = strtok(NULL, "\n");
165 if (!tok)
Denis Vlasenkob6aae0f2007-01-29 22:51:25 +0000166 tok = (char*)"";
Denis Vlasenko55a99402006-09-30 20:41:44 +0000167 /* New-style has commas, or -. If so,
168 truncate (other fields might follow). */
169 else if (strchr(tok, ',')) {
170 tok = strtok(tok, "\t ");
171 /* Strip trailing comma. */
172 if (tok[strlen(tok)-1] == ',')
173 tok[strlen(tok)-1] = '\0';
174 } else if (tok[0] == '-'
Denis Vlasenkob6aae0f2007-01-29 22:51:25 +0000175 && (tok[1] == '\0' || isspace(tok[1]))
176 ) {
177 tok = (char*)"";
178 }
179 printf(" %s", tok);
Denis Vlasenko55a99402006-09-30 20:41:44 +0000180 }
Denis Vlasenko4daad902007-09-27 10:20:47 +0000181 bb_putchar('\n');
Denis Vlasenkoea620772006-10-14 02:23:43 +0000182 free(line);
Denis Vlasenko55a99402006-09-30 20:41:44 +0000183 }
184 fclose(file);
Rob Landley627814b2005-05-03 22:34:03 +0000185 }
186#else
Rob Landley86b4d642006-08-03 17:58:17 +0000187 xprint_and_close_file(file);
Rob Landley627814b2005-05-03 22:34:03 +0000188#endif /* CONFIG_FEATURE_2_6_MODULES */
Rob Landley86b4d642006-08-03 17:58:17 +0000189 return EXIT_SUCCESS;
Eric Andersen21adca72000-12-06 18:18:26 +0000190}
191
Eric Andersen71ae64b2002-10-10 04:20:21 +0000192#endif /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */