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 "libbb.h"
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15 |
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16 |
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17 | #if !ENABLE_FEATURE_CHECK_TAINTED_MODULE
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18 | static void check_tainted(void) { puts(""); }
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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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47 | #if ENABLE_FEATURE_QUERY_MODULE_INTERFACE
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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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77 | int lsmod_main(int argc, char **argv);
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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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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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89 | }
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90 |
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91 | deps = xmalloc(depsize = 256);
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92 | printf("Module\t\t\tSize Used by");
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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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104 | while (query_module(mn, QM_REFS, deps, depsize, &count)) {
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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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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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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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131 | puts("");
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132 | }
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133 |
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134 | #if ENABLE_FEATURE_CLEAN_UP
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135 | free(module_names);
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136 | #endif
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137 |
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138 | return 0;
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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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143 | int lsmod_main(int argc, char **argv);
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144 | int lsmod_main(int argc, char **argv)
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145 | {
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146 | FILE *file = xfopen("/proc/modules", "r");
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147 |
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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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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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155 |
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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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185 | }
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186 | #else
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187 | xprint_and_close_file(file);
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188 | #endif /* CONFIG_FEATURE_2_6_MODULES */
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189 | return EXIT_SUCCESS;
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190 | }
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191 |
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192 | #endif /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */
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