1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Modprobe written from scratch for BusyBox
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4 | *
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5 | * Copyright (c) 2002 by Robert Griebl, griebl@gmx.de
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6 | * Copyright (c) 2003 by Andrew Dennison, andrew.dennison@motec.com.au
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7 | * Copyright (c) 2005 by Jim Bauer, jfbauer@nfr.com
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8 | *
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9 | * Portions Copyright (c) 2005 by Yann E. MORIN, yann.morin.1998@anciens.enib.fr
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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 | #include <sys/utsname.h>
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16 | #include <fnmatch.h>
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17 |
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18 | struct mod_opt_t { /* one-way list of options to pass to a module */
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19 | char * m_opt_val;
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20 | struct mod_opt_t * m_next;
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21 | };
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22 |
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23 | struct dep_t { /* one-way list of dependency rules */
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24 | /* a dependency rule */
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25 | char * m_name; /* the module name*/
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26 | char * m_path; /* the module file path */
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27 | struct mod_opt_t * m_options; /* the module options */
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28 |
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29 | int m_isalias : 1; /* the module is an alias */
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30 | int m_reserved : 15; /* stuffin' */
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31 |
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32 | int m_depcnt : 16; /* the number of dependable module(s) */
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33 | char ** m_deparr; /* the list of dependable module(s) */
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34 |
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35 | struct dep_t * m_next; /* the next dependency rule */
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36 | };
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37 |
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38 | struct mod_list_t { /* two-way list of modules to process */
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39 | /* a module description */
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40 | const char * m_name;
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41 | char * m_path;
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42 | struct mod_opt_t * m_options;
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43 |
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44 | struct mod_list_t * m_prev;
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45 | struct mod_list_t * m_next;
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46 | };
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47 |
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48 |
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49 | static struct dep_t *depend;
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50 |
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51 | #define main_options "acdklnqrst:vVC:"
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52 | #define INSERT_ALL 1 /* a */
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53 | #define DUMP_CONF_EXIT 2 /* c */
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54 | #define D_OPT_IGNORED 4 /* d */
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55 | #define AUTOCLEAN_FLG 8 /* k */
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56 | #define LIST_ALL 16 /* l */
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57 | #define SHOW_ONLY 32 /* n */
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58 | #define QUIET 64 /* q */
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59 | #define REMOVE_OPT 128 /* r */
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60 | #define DO_SYSLOG 256 /* s */
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61 | #define RESTRICT_DIR 512 /* t */
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62 | #define VERBOSE 1024 /* v */
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63 | #define VERSION_ONLY 2048 /* V */
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64 | #define CONFIG_FILE 4096 /* C */
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65 |
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66 | #define autoclean (main_opts & AUTOCLEAN_FLG)
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67 | #define show_only (main_opts & SHOW_ONLY)
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68 | #define quiet (main_opts & QUIET)
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69 | #define remove_opt (main_opts & REMOVE_OPT)
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70 | #define do_syslog (main_opts & DO_SYSLOG)
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71 | #define verbose (main_opts & VERBOSE)
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72 |
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73 | static int main_opts;
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74 |
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75 | static int parse_tag_value(char *buffer, char **ptag, char **pvalue)
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76 | {
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77 | char *tag, *value;
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78 |
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79 | buffer = skip_whitespace(buffer);
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80 | tag = value = buffer;
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81 | while (!isspace(*value))
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82 | if (!*value) return 0;
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83 | else value++;
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84 | *value++ = 0;
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85 | value = skip_whitespace(value);
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86 | if (!*value) return 0;
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87 |
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88 | *ptag = tag;
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89 | *pvalue = value;
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90 |
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91 | return 1;
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92 | }
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93 |
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94 | /*
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95 | * This function appends an option to a list
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96 | */
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97 | static struct mod_opt_t *append_option(struct mod_opt_t *opt_list, char *opt)
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98 | {
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99 | struct mod_opt_t *ol = opt_list;
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100 |
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101 | if (ol) {
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102 | while (ol->m_next) {
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103 | ol = ol->m_next;
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104 | }
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105 | ol->m_next = xmalloc(sizeof(struct mod_opt_t));
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106 | ol = ol->m_next;
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107 | } else {
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108 | ol = opt_list = xmalloc(sizeof(struct mod_opt_t));
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109 | }
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110 |
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111 | ol->m_opt_val = xstrdup(opt);
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112 | ol->m_next = NULL;
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113 |
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114 | return opt_list;
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115 | }
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116 |
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117 | #if ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS
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118 | /* static char* parse_command_string(char* src, char **dst);
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119 | * src: pointer to string containing argument
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120 | * dst: pointer to where to store the parsed argument
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121 | * return value: the pointer to the first char after the parsed argument,
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122 | * NULL if there was no argument parsed (only trailing spaces).
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123 | * Note that memory is allocated with xstrdup when a new argument was
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124 | * parsed. Don't forget to free it!
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125 | */
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126 | #define ARG_EMPTY 0x00
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127 | #define ARG_IN_DQUOTES 0x01
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128 | #define ARG_IN_SQUOTES 0x02
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129 | static char *parse_command_string(char *src, char **dst)
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130 | {
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131 | int opt_status = ARG_EMPTY;
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132 | char* tmp_str;
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133 |
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134 | /* Dumb you, I have nothing to do... */
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135 | if (src == NULL) return src;
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136 |
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137 | /* Skip leading spaces */
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138 | while (*src == ' ') {
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139 | src++;
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140 | }
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141 | /* Is the end of string reached? */
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142 | if (*src == '\0') {
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143 | return NULL;
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144 | }
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145 | /* Reached the start of an argument
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146 | * By the way, we duplicate a little too much
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147 | * here but what is too much is freed later. */
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148 | *dst = tmp_str = xstrdup(src);
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149 | /* Get to the end of that argument */
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150 | while (*tmp_str != '\0'
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151 | && (*tmp_str != ' ' || (opt_status & (ARG_IN_DQUOTES | ARG_IN_SQUOTES)))
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152 | ) {
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153 | switch (*tmp_str) {
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154 | case '\'':
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155 | if (opt_status & ARG_IN_DQUOTES) {
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156 | /* Already in double quotes, keep current char as is */
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157 | } else {
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158 | /* shift left 1 char, until end of string: get rid of the opening/closing quotes */
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159 | memmove(tmp_str, tmp_str + 1, strlen(tmp_str));
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160 | /* mark me: we enter or leave single quotes */
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161 | opt_status ^= ARG_IN_SQUOTES;
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162 | /* Back one char, as we need to re-scan the new char there. */
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163 | tmp_str--;
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164 | }
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165 | break;
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166 | case '"':
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167 | if (opt_status & ARG_IN_SQUOTES) {
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168 | /* Already in single quotes, keep current char as is */
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169 | } else {
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170 | /* shift left 1 char, until end of string: get rid of the opening/closing quotes */
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171 | memmove(tmp_str, tmp_str + 1, strlen(tmp_str));
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172 | /* mark me: we enter or leave double quotes */
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173 | opt_status ^= ARG_IN_DQUOTES;
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174 | /* Back one char, as we need to re-scan the new char there. */
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175 | tmp_str--;
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176 | }
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177 | break;
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178 | case '\\':
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179 | if (opt_status & ARG_IN_SQUOTES) {
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180 | /* Between single quotes: keep as is. */
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181 | } else {
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182 | switch (*(tmp_str+1)) {
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183 | case 'a':
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184 | case 'b':
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185 | case 't':
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186 | case 'n':
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187 | case 'v':
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188 | case 'f':
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189 | case 'r':
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190 | case '0':
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191 | /* We escaped a special character. For now, keep
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192 | * both the back-slash and the following char. */
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193 | tmp_str++; src++;
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194 | break;
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195 | default:
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196 | /* We escaped a space or a single or double quote,
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197 | * or a back-slash, or a non-escapable char. Remove
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198 | * the '\' and keep the new current char as is. */
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199 | memmove(tmp_str, tmp_str + 1, strlen(tmp_str));
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200 | break;
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201 | }
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202 | }
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203 | break;
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204 | /* Any other char that is special shall appear here.
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205 | * Example: $ starts a variable
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206 | case '$':
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207 | do_variable_expansion();
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208 | break;
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209 | * */
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210 | default:
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211 | /* any other char is kept as is. */
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212 | break;
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213 | }
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214 | tmp_str++; /* Go to next char */
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215 | src++; /* Go to next char to find the end of the argument. */
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216 | }
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217 | /* End of string, but still no ending quote */
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218 | if (opt_status & (ARG_IN_DQUOTES | ARG_IN_SQUOTES)) {
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219 | bb_error_msg_and_die("unterminated (single or double) quote in options list: %s", src);
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220 | }
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221 | *tmp_str++ = '\0';
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222 | *dst = xrealloc(*dst, (tmp_str - *dst));
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223 | return src;
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224 | }
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225 | #else
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226 | #define parse_command_string(src, dst) (0)
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227 | #endif /* ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS */
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228 |
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229 | /*
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230 | * This function reads aliases and default module options from a configuration file
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231 | * (/etc/modprobe.conf syntax). It supports includes (only files, no directories).
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232 | */
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233 | static void include_conf(struct dep_t **first, struct dep_t **current, char *buffer, int buflen, int fd)
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234 | {
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235 | int continuation_line = 0;
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236 |
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237 | // alias parsing is not 100% correct (no correct handling of continuation lines within an alias)!
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238 |
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239 | while (reads(fd, buffer, buflen)) {
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240 | int l;
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241 | char *p;
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242 |
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243 | p = strchr(buffer, '#');
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244 | if (p)
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245 | *p = 0;
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246 |
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247 | l = strlen(buffer);
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248 |
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249 | while (l && isspace(buffer[l-1])) {
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250 | buffer[l-1] = 0;
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251 | l--;
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252 | }
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253 |
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254 | if (l == 0) {
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255 | continuation_line = 0;
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256 | continue;
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257 | }
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258 |
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259 | if (!continuation_line) {
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260 | if ((strncmp(buffer, "alias", 5) == 0) && isspace(buffer[5])) {
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261 | char *alias, *mod;
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262 |
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263 | if (parse_tag_value(buffer + 6, &alias, &mod)) {
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264 | /* handle alias as a module dependent on the aliased module */
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265 | if (!*current) {
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266 | (*first) = (*current) = xzalloc(sizeof(struct dep_t));
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267 | } else {
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268 | (*current)->m_next = xzalloc(sizeof(struct dep_t));
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269 | (*current) = (*current)->m_next;
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270 | }
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271 | (*current)->m_name = xstrdup(alias);
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272 | (*current)->m_isalias = 1;
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273 |
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274 | if ((strcmp(mod, "off") == 0) || (strcmp(mod, "null") == 0)) {
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275 | (*current)->m_depcnt = 0;
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276 | (*current)->m_deparr = 0;
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277 | } else {
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278 | (*current)->m_depcnt = 1;
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279 | (*current)->m_deparr = xmalloc(1 * sizeof(char *));
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280 | (*current)->m_deparr[0] = xstrdup(mod);
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281 | }
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282 | (*current)->m_next = 0;
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283 | }
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284 | } else if ((strncmp(buffer, "options", 7) == 0) && isspace(buffer[7])) {
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285 | char *mod, *opt;
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286 |
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287 | /* split the line in the module/alias name, and options */
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288 | if (parse_tag_value(buffer + 8, &mod, &opt)) {
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289 | struct dep_t *dt;
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290 |
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291 | /* find the corresponding module */
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292 | for (dt = *first; dt; dt = dt->m_next) {
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293 | if (strcmp(dt->m_name, mod) == 0)
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294 | break;
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295 | }
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296 | if (dt) {
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297 | if (ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS) {
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298 | char* new_opt = NULL;
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299 | while ((opt = parse_command_string(opt, &new_opt))) {
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300 | dt->m_options = append_option(dt->m_options, new_opt);
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301 | }
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302 | } else {
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303 | dt->m_options = append_option(dt->m_options, opt);
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304 | }
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305 | }
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306 | }
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307 | } else if ((strncmp(buffer, "include", 7) == 0) && isspace(buffer[7])) {
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308 | int fdi; char *filename;
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309 |
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310 | filename = skip_whitespace(buffer + 8);
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311 |
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312 | if ((fdi = open(filename, O_RDONLY)) >= 0) {
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313 | include_conf(first, current, buffer, buflen, fdi);
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314 | close(fdi);
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315 | }
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316 | }
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317 | }
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318 | }
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319 | }
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320 |
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321 | /*
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322 | * This function builds a list of dependency rules from /lib/modules/`uname -r`/modules.dep.
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323 | * It then fills every modules and aliases with their default options, found by parsing
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324 | * modprobe.conf (or modules.conf, or conf.modules).
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325 | */
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326 | static struct dep_t *build_dep(void)
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327 | {
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328 | int fd;
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329 | struct utsname un;
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330 | struct dep_t *first = 0;
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331 | struct dep_t *current = 0;
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332 | char buffer[2048];
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333 | char *filename;
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334 | int continuation_line = 0;
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335 | int k_version;
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336 |
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337 | if (uname(&un))
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338 | bb_error_msg_and_die("can't determine kernel version");
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339 |
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340 | k_version = 0;
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341 | if (un.release[0] == '2') {
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342 | k_version = un.release[2] - '0';
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343 | }
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344 |
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345 | filename = xasprintf("/lib/modules/%s/modules.dep", un.release);
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346 | fd = open(filename, O_RDONLY);
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347 | if (ENABLE_FEATURE_CLEAN_UP)
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348 | free(filename);
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349 | if (fd < 0) {
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350 | /* Ok, that didn't work. Fall back to looking in /lib/modules */
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351 | fd = open("/lib/modules/modules.dep", O_RDONLY);
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352 | if (fd < 0) {
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353 | return 0;
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354 | }
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355 | }
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356 |
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357 | while (reads(fd, buffer, sizeof(buffer))) {
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358 | int l = strlen(buffer);
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359 | char *p = 0;
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360 |
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361 | while (l > 0 && isspace(buffer[l-1])) {
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362 | buffer[l-1] = 0;
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363 | l--;
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364 | }
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365 |
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366 | if (l == 0) {
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367 | continuation_line = 0;
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368 | continue;
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369 | }
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370 |
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371 | /* Is this a new module dep description? */
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372 | if (!continuation_line) {
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373 | /* find the dep beginning */
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374 | char *col = strchr(buffer, ':');
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375 | char *dot = col;
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376 |
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377 | if (col) {
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378 | /* This line is a dep description */
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379 | const char *mods;
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380 | char *modpath;
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381 | char *mod;
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382 |
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383 | /* Find the beginning of the module file name */
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384 | *col = 0;
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385 | mods = bb_basename(buffer);
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386 |
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387 | /* find the path of the module */
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388 | modpath = strchr(buffer, '/'); /* ... and this is the path */
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389 | if (!modpath)
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390 | modpath = buffer; /* module with no path */
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391 | /* find the end of the module name in the file name */
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392 | if (ENABLE_FEATURE_2_6_MODULES &&
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393 | (k_version > 4) && (*(col-3) == '.') &&
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394 | (*(col-2) == 'k') && (*(col-1) == 'o'))
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395 | dot = col - 3;
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396 | else
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397 | if ((*(col-2) == '.') && (*(col-1) == 'o'))
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398 | dot = col - 2;
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399 |
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400 | mod = xstrndup(mods, dot - mods);
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401 |
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402 | /* enqueue new module */
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403 | if (!current) {
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404 | first = current = xmalloc(sizeof(struct dep_t));
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405 | } else {
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406 | current->m_next = xmalloc(sizeof(struct dep_t));
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407 | current = current->m_next;
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408 | }
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409 | current->m_name = mod;
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410 | current->m_path = xstrdup(modpath);
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411 | current->m_options = NULL;
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412 | current->m_isalias = 0;
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413 | current->m_depcnt = 0;
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414 | current->m_deparr = 0;
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415 | current->m_next = 0;
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416 |
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417 | p = col + 1;
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418 | } else
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419 | /* this line is not a dep description */
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420 | p = 0;
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421 | } else
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422 | /* It's a dep description continuation */
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423 | p = buffer;
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424 |
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425 | while (p && *p && isblank(*p))
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426 | p++;
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427 |
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428 | /* p points to the first dependable module; if NULL, no dependable module */
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429 | if (p && *p) {
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430 | char *end = &buffer[l-1];
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431 | const char *deps;
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432 | char *dep;
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433 | char *next;
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434 | int ext = 0;
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435 |
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436 | while (isblank(*end) || (*end == '\\'))
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437 | end--;
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438 |
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439 | do {
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440 | /* search the end of the dependency */
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441 | next = strchr(p, ' ');
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442 | if (next) {
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443 | *next = 0;
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444 | next--;
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445 | } else
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446 | next = end;
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447 |
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448 | /* find the beginning of the module file name */
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449 | deps = bb_basename(p);
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450 | if (deps == p) {
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451 | while (isblank(*deps))
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452 | deps++;
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453 | }
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454 |
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455 | /* find the end of the module name in the file name */
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456 | if (ENABLE_FEATURE_2_6_MODULES
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457 | && (k_version > 4) && (*(next-2) == '.')
|
---|
458 | && (*(next-1) == 'k') && (*next == 'o'))
|
---|
459 | ext = 3;
|
---|
460 | else
|
---|
461 | if ((*(next-1) == '.') && (*next == 'o'))
|
---|
462 | ext = 2;
|
---|
463 |
|
---|
464 | /* Cope with blank lines */
|
---|
465 | if ((next-deps-ext+1) <= 0)
|
---|
466 | continue;
|
---|
467 | dep = xstrndup(deps, next - deps - ext + 1);
|
---|
468 |
|
---|
469 | /* Add the new dependable module name */
|
---|
470 | current->m_depcnt++;
|
---|
471 | current->m_deparr = xrealloc(current->m_deparr,
|
---|
472 | sizeof(char *) * current->m_depcnt);
|
---|
473 | current->m_deparr[current->m_depcnt - 1] = dep;
|
---|
474 |
|
---|
475 | p = next + 2;
|
---|
476 | } while (next < end);
|
---|
477 | }
|
---|
478 |
|
---|
479 | /* is there other dependable module(s) ? */
|
---|
480 | if (buffer[l-1] == '\\')
|
---|
481 | continuation_line = 1;
|
---|
482 | else
|
---|
483 | continuation_line = 0;
|
---|
484 | }
|
---|
485 | close(fd);
|
---|
486 |
|
---|
487 | /*
|
---|
488 | * First parse system-specific options and aliases
|
---|
489 | * as they take precedence over the kernel ones.
|
---|
490 | * >=2.6: we only care about modprobe.conf
|
---|
491 | * <=2.4: we care about modules.conf and conf.modules
|
---|
492 | */
|
---|
493 | if (ENABLE_FEATURE_2_6_MODULES
|
---|
494 | && (fd = open("/etc/modprobe.conf", O_RDONLY)) < 0)
|
---|
495 | if (ENABLE_FEATURE_2_4_MODULES
|
---|
496 | && (fd = open("/etc/modules.conf", O_RDONLY)) < 0)
|
---|
497 | if (ENABLE_FEATURE_2_4_MODULES)
|
---|
498 | fd = open("/etc/conf.modules", O_RDONLY);
|
---|
499 |
|
---|
500 | if (fd >= 0) {
|
---|
501 | include_conf(&first, ¤t, buffer, sizeof(buffer), fd);
|
---|
502 | close(fd);
|
---|
503 | }
|
---|
504 |
|
---|
505 | /* Only 2.6 has a modules.alias file */
|
---|
506 | if (ENABLE_FEATURE_2_6_MODULES) {
|
---|
507 | /* Parse kernel-declared module aliases */
|
---|
508 | filename = xasprintf("/lib/modules/%s/modules.alias", un.release);
|
---|
509 | fd = open(filename, O_RDONLY);
|
---|
510 | if (fd < 0) {
|
---|
511 | /* Ok, that didn't work. Fall back to looking in /lib/modules */
|
---|
512 | fd = open("/lib/modules/modules.alias", O_RDONLY);
|
---|
513 | }
|
---|
514 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
515 | free(filename);
|
---|
516 |
|
---|
517 | if (fd >= 0) {
|
---|
518 | include_conf(&first, ¤t, buffer, sizeof(buffer), fd);
|
---|
519 | close(fd);
|
---|
520 | }
|
---|
521 |
|
---|
522 | /* Parse kernel-declared symbol aliases */
|
---|
523 | filename = xasprintf("/lib/modules/%s/modules.symbols", un.release);
|
---|
524 | fd = open(filename, O_RDONLY);
|
---|
525 | if (fd < 0) {
|
---|
526 | /* Ok, that didn't work. Fall back to looking in /lib/modules */
|
---|
527 | fd = open("/lib/modules/modules.symbols", O_RDONLY);
|
---|
528 | }
|
---|
529 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
530 | free(filename);
|
---|
531 |
|
---|
532 | if (fd >= 0) {
|
---|
533 | include_conf(&first, ¤t, buffer, sizeof(buffer), fd);
|
---|
534 | close(fd);
|
---|
535 | }
|
---|
536 | }
|
---|
537 |
|
---|
538 | return first;
|
---|
539 | }
|
---|
540 |
|
---|
541 | /* return 1 = loaded, 0 = not loaded, -1 = can't tell */
|
---|
542 | static int already_loaded(const char *name)
|
---|
543 | {
|
---|
544 | int fd, ret = 0;
|
---|
545 | char buffer[4096];
|
---|
546 |
|
---|
547 | fd = open("/proc/modules", O_RDONLY);
|
---|
548 | if (fd < 0)
|
---|
549 | return -1;
|
---|
550 |
|
---|
551 | while (reads(fd, buffer, sizeof(buffer))) {
|
---|
552 | char *p;
|
---|
553 |
|
---|
554 | p = strchr (buffer, ' ');
|
---|
555 | if (p) {
|
---|
556 | const char *n;
|
---|
557 |
|
---|
558 | // Truncate buffer at first space and check for matches, with
|
---|
559 | // the idiosyncrasy that _ and - are interchangeable because the
|
---|
560 | // 2.6 kernel does weird things.
|
---|
561 |
|
---|
562 | *p = 0;
|
---|
563 | for (p = buffer, n = name; ; p++, n++) {
|
---|
564 | if (*p != *n) {
|
---|
565 | if ((*p == '_' || *p == '-') && (*n == '_' || *n == '-'))
|
---|
566 | continue;
|
---|
567 | break;
|
---|
568 | }
|
---|
569 | // If we made it to the end, that's a match.
|
---|
570 | if (!*p) {
|
---|
571 | ret = 1;
|
---|
572 | goto done;
|
---|
573 | }
|
---|
574 | }
|
---|
575 | }
|
---|
576 | }
|
---|
577 | done:
|
---|
578 | close (fd);
|
---|
579 | return ret;
|
---|
580 | }
|
---|
581 |
|
---|
582 | static int mod_process(const struct mod_list_t *list, int do_insert)
|
---|
583 | {
|
---|
584 | int rc = 0;
|
---|
585 | char **argv = NULL;
|
---|
586 | struct mod_opt_t *opts;
|
---|
587 | int argc_malloc; /* never used when CONFIG_FEATURE_CLEAN_UP not defined */
|
---|
588 | int argc;
|
---|
589 |
|
---|
590 | while (list) {
|
---|
591 | argc = 0;
|
---|
592 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
593 | argc_malloc = 0;
|
---|
594 | /* If CONFIG_FEATURE_CLEAN_UP is not defined, then we leak memory
|
---|
595 | * each time we allocate memory for argv.
|
---|
596 | * But it is (quite) small amounts of memory that leak each
|
---|
597 | * time a module is loaded, and it is reclaimed when modprobe
|
---|
598 | * exits anyway (even when standalone shell?).
|
---|
599 | * This could become a problem when loading a module with LOTS of
|
---|
600 | * dependencies, with LOTS of options for each dependencies, with
|
---|
601 | * very little memory on the target... But in that case, the module
|
---|
602 | * would not load because there is no more memory, so there's no
|
---|
603 | * problem. */
|
---|
604 | /* enough for minimal insmod (5 args + NULL) or rmmod (3 args + NULL) */
|
---|
605 | argv = xmalloc(6 * sizeof(char*));
|
---|
606 | if (do_insert) {
|
---|
607 | if (already_loaded(list->m_name) != 1) {
|
---|
608 | argv[argc++] = (char*)"insmod";
|
---|
609 | if (ENABLE_FEATURE_2_4_MODULES) {
|
---|
610 | if (do_syslog)
|
---|
611 | argv[argc++] = (char*)"-s";
|
---|
612 | if (autoclean)
|
---|
613 | argv[argc++] = (char*)"-k";
|
---|
614 | if (quiet)
|
---|
615 | argv[argc++] = (char*)"-q";
|
---|
616 | else if (verbose) /* verbose and quiet are mutually exclusive */
|
---|
617 | argv[argc++] = (char*)"-v";
|
---|
618 | }
|
---|
619 | argv[argc++] = list->m_path;
|
---|
620 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
621 | argc_malloc = argc;
|
---|
622 | opts = list->m_options;
|
---|
623 | while (opts) {
|
---|
624 | /* Add one more option */
|
---|
625 | argc++;
|
---|
626 | argv = xrealloc(argv,(argc + 1)* sizeof(char*));
|
---|
627 | argv[argc-1] = opts->m_opt_val;
|
---|
628 | opts = opts->m_next;
|
---|
629 | }
|
---|
630 | }
|
---|
631 | } else {
|
---|
632 | /* modutils uses short name for removal */
|
---|
633 | if (already_loaded(list->m_name) != 0) {
|
---|
634 | argv[argc++] = (char*)"rmmod";
|
---|
635 | if (do_syslog)
|
---|
636 | argv[argc++] = (char*)"-s";
|
---|
637 | argv[argc++] = (char*)list->m_name;
|
---|
638 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
639 | argc_malloc = argc;
|
---|
640 | }
|
---|
641 | }
|
---|
642 | argv[argc] = NULL;
|
---|
643 |
|
---|
644 | if (argc) {
|
---|
645 | if (verbose) {
|
---|
646 | printf("%s module %s\n", do_insert?"Loading":"Unloading", list->m_name);
|
---|
647 | }
|
---|
648 | if (!show_only) {
|
---|
649 | int rc2 = wait4pid(spawn(argv));
|
---|
650 |
|
---|
651 | if (do_insert) {
|
---|
652 | rc = rc2; /* only last module matters */
|
---|
653 | } else if (!rc2) {
|
---|
654 | rc = 0; /* success if remove any mod */
|
---|
655 | }
|
---|
656 | }
|
---|
657 | if (ENABLE_FEATURE_CLEAN_UP) {
|
---|
658 | /* the last value in the array has index == argc, but
|
---|
659 | * it is the terminating NULL, so we must not free it. */
|
---|
660 | while (argc_malloc < argc) {
|
---|
661 | free(argv[argc_malloc++]);
|
---|
662 | }
|
---|
663 | }
|
---|
664 | }
|
---|
665 | if (ENABLE_FEATURE_CLEAN_UP) {
|
---|
666 | free(argv);
|
---|
667 | argv = NULL;
|
---|
668 | }
|
---|
669 | list = do_insert ? list->m_prev : list->m_next;
|
---|
670 | }
|
---|
671 | return (show_only) ? 0 : rc;
|
---|
672 | }
|
---|
673 |
|
---|
674 | /*
|
---|
675 | * Check the matching between a pattern and a module name.
|
---|
676 | * We need this as *_* is equivalent to *-*, even in pattern matching.
|
---|
677 | */
|
---|
678 | static int check_pattern(const char* pat_src, const char* mod_src)
|
---|
679 | {
|
---|
680 | int ret;
|
---|
681 |
|
---|
682 | if (ENABLE_FEATURE_MODPROBE_FANCY_ALIAS) {
|
---|
683 | char* pat;
|
---|
684 | char* mod;
|
---|
685 | char* p;
|
---|
686 |
|
---|
687 | pat = xstrdup(pat_src);
|
---|
688 | mod = xstrdup(mod_src);
|
---|
689 |
|
---|
690 | for (p = pat; (p = strchr(p, '-')); *p++ = '_');
|
---|
691 | for (p = mod; (p = strchr(p, '-')); *p++ = '_');
|
---|
692 |
|
---|
693 | ret = fnmatch(pat, mod, 0);
|
---|
694 |
|
---|
695 | if (ENABLE_FEATURE_CLEAN_UP) {
|
---|
696 | free(pat);
|
---|
697 | free(mod);
|
---|
698 | }
|
---|
699 |
|
---|
700 | return ret;
|
---|
701 | } else {
|
---|
702 | return fnmatch(pat_src, mod_src, 0);
|
---|
703 | }
|
---|
704 | }
|
---|
705 |
|
---|
706 | /*
|
---|
707 | * Builds the dependency list (aka stack) of a module.
|
---|
708 | * head: the highest module in the stack (last to insmod, first to rmmod)
|
---|
709 | * tail: the lowest module in the stack (first to insmod, last to rmmod)
|
---|
710 | */
|
---|
711 | static void check_dep(char *mod, struct mod_list_t **head, struct mod_list_t **tail)
|
---|
712 | {
|
---|
713 | struct mod_list_t *find;
|
---|
714 | struct dep_t *dt;
|
---|
715 | struct mod_opt_t *opt = 0;
|
---|
716 | char *path = 0;
|
---|
717 |
|
---|
718 | /* Search for the given module name amongst all dependency rules.
|
---|
719 | * The module name in a dependency rule can be a shell pattern,
|
---|
720 | * so try to match the given module name against such a pattern.
|
---|
721 | * Of course if the name in the dependency rule is a plain string,
|
---|
722 | * then we consider it a pattern, and matching will still work. */
|
---|
723 | for (dt = depend; dt; dt = dt->m_next) {
|
---|
724 | if (check_pattern(dt->m_name, mod) == 0) {
|
---|
725 | break;
|
---|
726 | }
|
---|
727 | }
|
---|
728 |
|
---|
729 | if (!dt) {
|
---|
730 | bb_error_msg("module %s not found", mod);
|
---|
731 | return;
|
---|
732 | }
|
---|
733 |
|
---|
734 | // resolve alias names
|
---|
735 | while (dt->m_isalias) {
|
---|
736 | if (dt->m_depcnt == 1) {
|
---|
737 | struct dep_t *adt;
|
---|
738 |
|
---|
739 | for (adt = depend; adt; adt = adt->m_next) {
|
---|
740 | if (check_pattern(adt->m_name, dt->m_deparr[0]) == 0)
|
---|
741 | break;
|
---|
742 | }
|
---|
743 | if (adt) {
|
---|
744 | /* This is the module we are aliased to */
|
---|
745 | struct mod_opt_t *opts = dt->m_options;
|
---|
746 | /* Option of the alias are appended to the options of the module */
|
---|
747 | while (opts) {
|
---|
748 | adt->m_options = append_option(adt->m_options, opts->m_opt_val);
|
---|
749 | opts = opts->m_next;
|
---|
750 | }
|
---|
751 | dt = adt;
|
---|
752 | } else {
|
---|
753 | bb_error_msg("module %s not found", mod);
|
---|
754 | return;
|
---|
755 | }
|
---|
756 | } else {
|
---|
757 | bb_error_msg("bad alias %s", dt->m_name);
|
---|
758 | return;
|
---|
759 | }
|
---|
760 | }
|
---|
761 |
|
---|
762 | mod = dt->m_name;
|
---|
763 | path = dt->m_path;
|
---|
764 | opt = dt->m_options;
|
---|
765 |
|
---|
766 | // search for duplicates
|
---|
767 | for (find = *head; find; find = find->m_next) {
|
---|
768 | if (!strcmp(mod, find->m_name)) {
|
---|
769 | // found ->dequeue it
|
---|
770 |
|
---|
771 | if (find->m_prev)
|
---|
772 | find->m_prev->m_next = find->m_next;
|
---|
773 | else
|
---|
774 | *head = find->m_next;
|
---|
775 |
|
---|
776 | if (find->m_next)
|
---|
777 | find->m_next->m_prev = find->m_prev;
|
---|
778 | else
|
---|
779 | *tail = find->m_prev;
|
---|
780 |
|
---|
781 | break; // there can be only one duplicate
|
---|
782 | }
|
---|
783 | }
|
---|
784 |
|
---|
785 | if (!find) { // did not find a duplicate
|
---|
786 | find = xmalloc(sizeof(struct mod_list_t));
|
---|
787 | find->m_name = mod;
|
---|
788 | find->m_path = path;
|
---|
789 | find->m_options = opt;
|
---|
790 | }
|
---|
791 |
|
---|
792 | // enqueue at tail
|
---|
793 | if (*tail)
|
---|
794 | (*tail)->m_next = find;
|
---|
795 | find->m_prev = *tail;
|
---|
796 | find->m_next = 0;
|
---|
797 |
|
---|
798 | if (!*head)
|
---|
799 | *head = find;
|
---|
800 | *tail = find;
|
---|
801 |
|
---|
802 | if (dt) {
|
---|
803 | int i;
|
---|
804 |
|
---|
805 | /* Add all dependable module for that new module */
|
---|
806 | for (i = 0; i < dt->m_depcnt; i++)
|
---|
807 | check_dep(dt->m_deparr[i], head, tail);
|
---|
808 | }
|
---|
809 | }
|
---|
810 |
|
---|
811 | static int mod_insert(char *mod, int argc, char **argv)
|
---|
812 | {
|
---|
813 | struct mod_list_t *tail = NULL;
|
---|
814 | struct mod_list_t *head = NULL;
|
---|
815 | int rc;
|
---|
816 |
|
---|
817 | // get dep list for module mod
|
---|
818 | check_dep(mod, &head, &tail);
|
---|
819 |
|
---|
820 | rc = 1;
|
---|
821 | if (head && tail) {
|
---|
822 | if (argc) {
|
---|
823 | int i;
|
---|
824 | // append module args
|
---|
825 | for (i = 0; i < argc; i++)
|
---|
826 | head->m_options = append_option(head->m_options, argv[i]);
|
---|
827 | }
|
---|
828 |
|
---|
829 | // process tail ---> head
|
---|
830 | rc = mod_process(tail, 1);
|
---|
831 | if (rc) {
|
---|
832 | /*
|
---|
833 | * In case of using udev, multiple instances of modprobe can be
|
---|
834 | * spawned to load the same module (think of two same usb devices,
|
---|
835 | * for example; or cold-plugging at boot time). Thus we shouldn't
|
---|
836 | * fail if the module was loaded, and not by us.
|
---|
837 | */
|
---|
838 | if (already_loaded(mod))
|
---|
839 | rc = 0;
|
---|
840 | }
|
---|
841 | }
|
---|
842 | return rc;
|
---|
843 | }
|
---|
844 |
|
---|
845 | static int mod_remove(char *mod)
|
---|
846 | {
|
---|
847 | int rc;
|
---|
848 | static const struct mod_list_t rm_a_dummy = { "-a", NULL, NULL, NULL, NULL };
|
---|
849 |
|
---|
850 | struct mod_list_t *head = NULL;
|
---|
851 | struct mod_list_t *tail = NULL;
|
---|
852 |
|
---|
853 | if (mod)
|
---|
854 | check_dep(mod, &head, &tail);
|
---|
855 | else // autoclean
|
---|
856 | head = tail = (struct mod_list_t*) &rm_a_dummy;
|
---|
857 |
|
---|
858 | rc = 1;
|
---|
859 | if (head && tail)
|
---|
860 | rc = mod_process(head, 0); // process head ---> tail
|
---|
861 | return rc;
|
---|
862 | }
|
---|
863 |
|
---|
864 | int modprobe_main(int argc, char** argv);
|
---|
865 | int modprobe_main(int argc, char** argv)
|
---|
866 | {
|
---|
867 | int rc = EXIT_SUCCESS;
|
---|
868 | char *unused;
|
---|
869 |
|
---|
870 | opt_complementary = "?V-:q-v:v-q";
|
---|
871 | main_opts = getopt32(argv, "acdklnqrst:vVC:",
|
---|
872 | &unused, &unused);
|
---|
873 | if (main_opts & (DUMP_CONF_EXIT | LIST_ALL))
|
---|
874 | return EXIT_SUCCESS;
|
---|
875 | if (main_opts & (RESTRICT_DIR | CONFIG_FILE))
|
---|
876 | bb_error_msg_and_die("-t and -C not supported");
|
---|
877 |
|
---|
878 | depend = build_dep();
|
---|
879 |
|
---|
880 | if (!depend)
|
---|
881 | bb_error_msg_and_die("cannot parse modules.dep");
|
---|
882 |
|
---|
883 | if (remove_opt) {
|
---|
884 | do {
|
---|
885 | if (mod_remove(optind < argc ?
|
---|
886 | argv[optind] : NULL)) {
|
---|
887 | bb_error_msg("failed to remove module %s",
|
---|
888 | argv[optind]);
|
---|
889 | rc = EXIT_FAILURE;
|
---|
890 | }
|
---|
891 | } while (++optind < argc);
|
---|
892 | } else {
|
---|
893 | if (optind >= argc)
|
---|
894 | bb_error_msg_and_die("no module or pattern provided");
|
---|
895 |
|
---|
896 | if (mod_insert(argv[optind], argc - optind - 1, argv + optind + 1))
|
---|
897 | bb_error_msg_and_die("failed to load module %s", argv[optind]);
|
---|
898 | }
|
---|
899 |
|
---|
900 | /* Here would be a good place to free up memory allocated during the dependencies build. */
|
---|
901 |
|
---|
902 | return rc;
|
---|
903 | }
|
---|