[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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[1770] | 14 | #include "libbb.h"
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[821] | 15 |
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| 16 |
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[1770] | 17 | #if !ENABLE_FEATURE_CHECK_TAINTED_MODULE
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| 18 | static void check_tainted(void) { puts(""); }
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[821] | 19 | #else
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| 20 | #define TAINT_FILENAME "/proc/sys/kernel/tainted"
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| 21 | #define TAINT_PROPRIETORY_MODULE (1<<0)
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| 22 | #define TAINT_FORCED_MODULE (1<<1)
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| 23 | #define TAINT_UNSAFE_SMP (1<<2)
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| 24 |
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| 25 | static void check_tainted(void)
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| 26 | {
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| 27 | int tainted;
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| 28 | FILE *f;
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| 29 |
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| 30 | tainted = 0;
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| 31 | if ((f = fopen(TAINT_FILENAME, "r"))) {
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| 32 | fscanf(f, "%d", &tainted);
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| 33 | fclose(f);
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| 34 | }
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| 35 | if (f && tainted) {
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| 36 | printf(" Tainted: %c%c%c\n",
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| 37 | tainted & TAINT_PROPRIETORY_MODULE ? 'P' : 'G',
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| 38 | tainted & TAINT_FORCED_MODULE ? 'F' : ' ',
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| 39 | tainted & TAINT_UNSAFE_SMP ? 'S' : ' ');
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| 40 | }
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| 41 | else {
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| 42 | printf(" Not tainted\n");
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| 43 | }
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| 44 | }
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| 45 | #endif
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| 46 |
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[1770] | 47 | #if ENABLE_FEATURE_QUERY_MODULE_INTERFACE
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[821] | 48 |
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| 49 | struct module_info
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| 50 | {
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| 51 | unsigned long addr;
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| 52 | unsigned long size;
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| 53 | unsigned long flags;
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| 54 | long usecount;
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| 55 | };
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| 56 |
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| 57 |
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| 58 | int query_module(const char *name, int which, void *buf, size_t bufsize, size_t *ret);
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| 59 |
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| 60 | enum {
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| 61 | /* Values for query_module's which. */
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| 62 | QM_MODULES = 1,
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| 63 | QM_DEPS = 2,
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| 64 | QM_REFS = 3,
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| 65 | QM_SYMBOLS = 4,
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| 66 | QM_INFO = 5,
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| 67 |
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| 68 | /* Bits of module.flags. */
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| 69 | NEW_MOD_RUNNING = 1,
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| 70 | NEW_MOD_DELETED = 2,
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| 71 | NEW_MOD_AUTOCLEAN = 4,
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| 72 | NEW_MOD_VISITED = 8,
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| 73 | NEW_MOD_USED_ONCE = 16,
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| 74 | NEW_MOD_INITIALIZING = 64
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| 75 | };
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| 76 |
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[1770] | 77 | int lsmod_main(int argc, char **argv);
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[821] | 78 | int lsmod_main(int argc, char **argv)
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| 79 | {
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| 80 | struct module_info info;
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| 81 | char *module_names, *mn, *deps, *dn;
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| 82 | size_t bufsize, depsize, nmod, count, i, j;
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| 83 |
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[1770] | 84 | module_names = deps = NULL;
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| 85 | bufsize = depsize = 0;
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| 86 | while (query_module(NULL, QM_MODULES, module_names, bufsize, &nmod)) {
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| 87 | if (errno != ENOSPC) bb_perror_msg_and_die("QM_MODULES");
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| 88 | module_names = xmalloc(bufsize = nmod);
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[821] | 89 | }
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| 90 |
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| 91 | deps = xmalloc(depsize = 256);
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[1770] | 92 | printf("Module\t\t\tSize Used by");
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[821] | 93 | check_tainted();
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| 94 |
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| 95 | for (i = 0, mn = module_names; i < nmod; mn += strlen(mn) + 1, i++) {
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| 96 | if (query_module(mn, QM_INFO, &info, sizeof(info), &count)) {
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| 97 | if (errno == ENOENT) {
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| 98 | /* The module was removed out from underneath us. */
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| 99 | continue;
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| 100 | }
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| 101 | /* else choke */
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| 102 | bb_perror_msg_and_die("module %s: QM_INFO", mn);
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| 103 | }
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[1770] | 104 | while (query_module(mn, QM_REFS, deps, depsize, &count)) {
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[821] | 105 | if (errno == ENOENT) {
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| 106 | /* The module was removed out from underneath us. */
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| 107 | continue;
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[1770] | 108 | } else if (errno != ENOSPC)
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| 109 | bb_perror_msg_and_die("module %s: QM_REFS", mn);
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| 110 | deps = xrealloc(deps, count);
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[821] | 111 | }
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| 112 | printf("%-20s%8lu%4ld", mn, info.size, info.usecount);
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| 113 | if (info.flags & NEW_MOD_DELETED)
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| 114 | printf(" (deleted)");
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| 115 | else if (info.flags & NEW_MOD_INITIALIZING)
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| 116 | printf(" (initializing)");
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| 117 | else if (!(info.flags & NEW_MOD_RUNNING))
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| 118 | printf(" (uninitialized)");
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| 119 | else {
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| 120 | if (info.flags & NEW_MOD_AUTOCLEAN)
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| 121 | printf(" (autoclean) ");
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| 122 | if (!(info.flags & NEW_MOD_USED_ONCE))
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| 123 | printf(" (unused)");
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| 124 | }
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| 125 | if (count) printf(" [");
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| 126 | for (j = 0, dn = deps; j < count; dn += strlen(dn) + 1, j++) {
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| 127 | printf("%s%s", dn, (j==count-1)? "":" ");
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| 128 | }
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| 129 | if (count) printf("]");
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| 130 |
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[1770] | 131 | puts("");
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[821] | 132 | }
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| 133 |
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[1770] | 134 | #if ENABLE_FEATURE_CLEAN_UP
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[821] | 135 | free(module_names);
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| 136 | #endif
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| 137 |
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[1770] | 138 | return 0;
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[821] | 139 | }
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| 140 |
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| 141 | #else /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */
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| 142 |
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[1770] | 143 | int lsmod_main(int argc, char **argv);
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[821] | 144 | int lsmod_main(int argc, char **argv)
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| 145 | {
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[1770] | 146 | FILE *file = xfopen("/proc/modules", "r");
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| 147 |
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[821] | 148 | printf("Module Size Used by");
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| 149 | check_tainted();
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| 150 | #if defined(CONFIG_FEATURE_LSMOD_PRETTY_2_6_OUTPUT)
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| 151 | {
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[1770] | 152 | char *line;
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| 153 | while ((line = xmalloc_fgets(file)) != NULL) {
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| 154 | char *tok;
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[821] | 155 |
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[1770] | 156 | tok = strtok(line, " \t");
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| 157 | printf("%-19s", tok);
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| 158 | tok = strtok(NULL, " \t\n");
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| 159 | printf(" %8s", tok);
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| 160 | tok = strtok(NULL, " \t\n");
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| 161 | /* Null if no module unloading support. */
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| 162 | if (tok) {
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| 163 | printf(" %s", tok);
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| 164 | tok = strtok(NULL, "\n");
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| 165 | if (!tok)
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| 166 | tok = (char*)"";
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| 167 | /* New-style has commas, or -. If so,
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| 168 | truncate (other fields might follow). */
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| 169 | else if (strchr(tok, ',')) {
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| 170 | tok = strtok(tok, "\t ");
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| 171 | /* Strip trailing comma. */
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| 172 | if (tok[strlen(tok)-1] == ',')
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| 173 | tok[strlen(tok)-1] = '\0';
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| 174 | } else if (tok[0] == '-'
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| 175 | && (tok[1] == '\0' || isspace(tok[1]))
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| 176 | ) {
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| 177 | tok = (char*)"";
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| 178 | }
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| 179 | printf(" %s", tok);
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| 180 | }
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| 181 | puts("");
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| 182 | free(line);
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| 183 | }
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| 184 | fclose(file);
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[821] | 185 | }
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| 186 | #else
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[1770] | 187 | xprint_and_close_file(file);
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[821] | 188 | #endif /* CONFIG_FEATURE_2_6_MODULES */
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[1770] | 189 | return EXIT_SUCCESS;
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[821] | 190 | }
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| 191 |
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| 192 | #endif /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */
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