[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Mini lsmod implementation for busybox
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| 4 | *
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| 5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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| 6 | *
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| 7 | * Modified by Alcove, Julien Gaulmin <julien.gaulmin@alcove.fr> and
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| 8 | * Nicolas Ferre <nicolas.ferre@alcove.fr> to support pre 2.1 kernels
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| 9 | * (which lack the query_module() interface).
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| 10 | *
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| 11 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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| 12 | */
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| 13 |
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| 14 | #include "busybox.h"
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| 15 | #include <stdlib.h>
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| 16 | #include <stdio.h>
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| 17 | #include <string.h>
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| 18 | #include <stddef.h>
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| 19 | #include <errno.h>
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| 20 | #include <unistd.h>
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| 21 | #include <dirent.h>
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| 22 | #include <ctype.h>
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| 23 | #include <assert.h>
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| 24 | #include <getopt.h>
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| 25 | #include <sys/utsname.h>
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| 26 | #include <sys/file.h>
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| 27 |
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| 28 |
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| 29 | #ifndef CONFIG_FEATURE_CHECK_TAINTED_MODULE
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| 30 | static inline void check_tainted(void) { printf("\n"); }
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| 31 | #else
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| 32 | #define TAINT_FILENAME "/proc/sys/kernel/tainted"
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| 33 | #define TAINT_PROPRIETORY_MODULE (1<<0)
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| 34 | #define TAINT_FORCED_MODULE (1<<1)
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| 35 | #define TAINT_UNSAFE_SMP (1<<2)
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| 36 |
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| 37 | static void check_tainted(void)
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| 38 | {
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| 39 | int tainted;
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| 40 | FILE *f;
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| 41 |
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| 42 | tainted = 0;
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| 43 | if ((f = fopen(TAINT_FILENAME, "r"))) {
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| 44 | fscanf(f, "%d", &tainted);
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| 45 | fclose(f);
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| 46 | }
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| 47 | if (f && tainted) {
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| 48 | printf(" Tainted: %c%c%c\n",
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| 49 | tainted & TAINT_PROPRIETORY_MODULE ? 'P' : 'G',
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| 50 | tainted & TAINT_FORCED_MODULE ? 'F' : ' ',
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| 51 | tainted & TAINT_UNSAFE_SMP ? 'S' : ' ');
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| 52 | }
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| 53 | else {
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| 54 | printf(" Not tainted\n");
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| 55 | }
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| 56 | }
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| 57 | #endif
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| 58 |
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| 59 | #ifdef CONFIG_FEATURE_QUERY_MODULE_INTERFACE
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| 60 |
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| 61 | struct module_info
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| 62 | {
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| 63 | unsigned long addr;
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| 64 | unsigned long size;
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| 65 | unsigned long flags;
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| 66 | long usecount;
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| 67 | };
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| 68 |
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| 69 |
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| 70 | int query_module(const char *name, int which, void *buf, size_t bufsize, size_t *ret);
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| 71 |
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| 72 | enum {
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| 73 | /* Values for query_module's which. */
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| 74 | QM_MODULES = 1,
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| 75 | QM_DEPS = 2,
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| 76 | QM_REFS = 3,
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| 77 | QM_SYMBOLS = 4,
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| 78 | QM_INFO = 5,
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| 79 |
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| 80 | /* Bits of module.flags. */
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| 81 | NEW_MOD_RUNNING = 1,
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| 82 | NEW_MOD_DELETED = 2,
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| 83 | NEW_MOD_AUTOCLEAN = 4,
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| 84 | NEW_MOD_VISITED = 8,
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| 85 | NEW_MOD_USED_ONCE = 16,
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| 86 | NEW_MOD_INITIALIZING = 64
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| 87 | };
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| 88 |
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| 89 | int lsmod_main(int argc, char **argv)
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| 90 | {
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| 91 | struct module_info info;
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| 92 | char *module_names, *mn, *deps, *dn;
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| 93 | size_t bufsize, depsize, nmod, count, i, j;
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| 94 |
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| 95 | module_names = xmalloc(bufsize = 256);
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[902] | 96 | if (my_query_module(NULL, QM_MODULES, &module_names, &bufsize, &nmod)) {
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[821] | 97 | bb_perror_msg_and_die("QM_MODULES");
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| 98 | }
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| 99 |
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| 100 | deps = xmalloc(depsize = 256);
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| 101 | printf("Module Size Used by");
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| 102 | check_tainted();
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| 103 |
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| 104 | for (i = 0, mn = module_names; i < nmod; mn += strlen(mn) + 1, i++) {
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| 105 | if (query_module(mn, QM_INFO, &info, sizeof(info), &count)) {
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| 106 | if (errno == ENOENT) {
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| 107 | /* The module was removed out from underneath us. */
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| 108 | continue;
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| 109 | }
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| 110 | /* else choke */
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| 111 | bb_perror_msg_and_die("module %s: QM_INFO", mn);
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| 112 | }
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[902] | 113 | if (my_query_module(mn, QM_REFS, &deps, &depsize, &count)) {
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[821] | 114 | if (errno == ENOENT) {
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| 115 | /* The module was removed out from underneath us. */
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| 116 | continue;
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| 117 | }
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| 118 | bb_perror_msg_and_die("module %s: QM_REFS", mn);
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| 119 | }
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| 120 | printf("%-20s%8lu%4ld", mn, info.size, info.usecount);
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| 121 | if (info.flags & NEW_MOD_DELETED)
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| 122 | printf(" (deleted)");
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| 123 | else if (info.flags & NEW_MOD_INITIALIZING)
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| 124 | printf(" (initializing)");
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| 125 | else if (!(info.flags & NEW_MOD_RUNNING))
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| 126 | printf(" (uninitialized)");
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| 127 | else {
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| 128 | if (info.flags & NEW_MOD_AUTOCLEAN)
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| 129 | printf(" (autoclean) ");
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| 130 | if (!(info.flags & NEW_MOD_USED_ONCE))
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| 131 | printf(" (unused)");
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| 132 | }
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| 133 | if (count) printf(" [");
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| 134 | for (j = 0, dn = deps; j < count; dn += strlen(dn) + 1, j++) {
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| 135 | printf("%s%s", dn, (j==count-1)? "":" ");
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| 136 | }
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| 137 | if (count) printf("]");
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| 138 |
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| 139 | printf("\n");
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| 140 | }
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| 141 |
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| 142 | #ifdef CONFIG_FEATURE_CLEAN_UP
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| 143 | free(module_names);
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| 144 | #endif
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| 145 |
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| 146 | return( 0);
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| 147 | }
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| 148 |
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| 149 | #else /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */
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| 150 |
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| 151 | int lsmod_main(int argc, char **argv)
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| 152 | {
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| 153 | printf("Module Size Used by");
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| 154 | check_tainted();
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| 155 | #if defined(CONFIG_FEATURE_LSMOD_PRETTY_2_6_OUTPUT)
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| 156 | {
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| 157 | FILE *file;
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| 158 | char line[4096];
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| 159 |
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| 160 | file = bb_xfopen("/proc/modules", "r");
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| 161 |
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| 162 | while (fgets(line, sizeof(line), file)) {
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| 163 | char *tok;
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| 164 |
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| 165 | tok = strtok(line, " \t");
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| 166 | printf("%-19s", tok);
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| 167 | tok = strtok(NULL, " \t\n");
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| 168 | printf(" %8s", tok);
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| 169 | tok = strtok(NULL, " \t\n");
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| 170 | /* Null if no module unloading support. */
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| 171 | if (tok) {
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| 172 | printf(" %s", tok);
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| 173 | tok = strtok(NULL, "\n");
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| 174 | if (!tok)
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| 175 | tok = "";
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| 176 | /* New-style has commas, or -. If so,
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| 177 | truncate (other fields might follow). */
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| 178 | else if (strchr(tok, ',')) {
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| 179 | tok = strtok(tok, "\t ");
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| 180 | /* Strip trailing comma. */
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| 181 | if (tok[strlen(tok)-1] == ',')
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| 182 | tok[strlen(tok)-1] = '\0';
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| 183 | } else if (tok[0] == '-'
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| 184 | && (tok[1] == '\0' || isspace(tok[1])))
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| 185 | tok = "";
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| 186 | printf(" %s", tok);
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| 187 | }
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| 188 | printf("\n");
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| 189 | }
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| 190 | fclose(file);
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| 191 | }
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| 192 | return EXIT_SUCCESS;
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| 193 | #else
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| 194 | if (bb_xprint_file_by_name("/proc/modules") == 0)
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| 195 | return EXIT_SUCCESS;
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| 196 | #endif /* CONFIG_FEATURE_2_6_MODULES */
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| 197 |
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| 198 | return EXIT_FAILURE;
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| 199 | }
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| 200 |
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| 201 | #endif /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */
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