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) 2008 Timo Teras <timo.teras@iki.fi>
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6 | * Copyright (c) 2008 Vladimir Dronnikov
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7 | *
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8 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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9 | */
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10 |
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11 | //applet:IF_MODPROBE(APPLET(modprobe, BB_DIR_SBIN, BB_SUID_DROP))
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12 |
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13 | #include "libbb.h"
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14 | #include "modutils.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 | //#define DBG(fmt, ...) bb_error_msg("%s: " fmt, __func__, ## __VA_ARGS__)
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19 | #define DBG(...) ((void)0)
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20 |
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21 | /* Note that unlike older versions of modules.dep/depmod (busybox and m-i-t),
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22 | * we expect the full dependency list to be specified in modules.dep.
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23 | * Older versions would only export the direct dependency list.
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24 | */
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25 |
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26 |
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27 | //usage:#if !ENABLE_MODPROBE_SMALL
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28 | //usage:#define modprobe_notes_usage
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29 | //usage: "modprobe can (un)load a stack of modules, passing each module options (when\n"
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30 | //usage: "loading). modprobe uses a configuration file to determine what option(s) to\n"
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31 | //usage: "pass each module it loads.\n"
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32 | //usage: "\n"
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33 | //usage: "The configuration file is searched (in this order):\n"
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34 | //usage: "\n"
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35 | //usage: " /etc/modprobe.conf (2.6 only)\n"
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36 | //usage: " /etc/modules.conf\n"
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37 | //usage: " /etc/conf.modules (deprecated)\n"
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38 | //usage: "\n"
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39 | //usage: "They all have the same syntax (see below). If none is present, it is\n"
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40 | //usage: "_not_ an error; each loaded module is then expected to load without\n"
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41 | //usage: "options. Once a file is found, the others are tested for.\n"
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42 | //usage: "\n"
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43 | //usage: "/etc/modules.conf entry format:\n"
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44 | //usage: "\n"
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45 | //usage: " alias <alias_name> <mod_name>\n"
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46 | //usage: " Makes it possible to modprobe alias_name, when there is no such module.\n"
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47 | //usage: " It makes sense if your mod_name is long, or you want a more representative\n"
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48 | //usage: " name for that module (eg. 'scsi' in place of 'aha7xxx').\n"
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49 | //usage: " This makes it also possible to use a different set of options (below) for\n"
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50 | //usage: " the module and the alias.\n"
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51 | //usage: " A module can be aliased more than once.\n"
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52 | //usage: "\n"
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53 | //usage: " options <mod_name|alias_name> <symbol=value...>\n"
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54 | //usage: " When loading module mod_name (or the module aliased by alias_name), pass\n"
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55 | //usage: " the \"symbol=value\" pairs as option to that module.\n"
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56 | //usage: "\n"
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57 | //usage: "Sample /etc/modules.conf file:\n"
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58 | //usage: "\n"
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59 | //usage: " options tulip irq=3\n"
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60 | //usage: " alias tulip tulip2\n"
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61 | //usage: " options tulip2 irq=4 io=0x308\n"
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62 | //usage: "\n"
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63 | //usage: "Other functionality offered by 'classic' modprobe is not available in\n"
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64 | //usage: "this implementation.\n"
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65 | //usage: "\n"
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66 | //usage: "If module options are present both in the config file, and on the command line,\n"
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67 | //usage: "then the options from the command line will be passed to the module _after_\n"
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68 | //usage: "the options from the config file. That way, you can have defaults in the config\n"
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69 | //usage: "file, and override them for a specific usage from the command line.\n"
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70 | //usage:#define modprobe_example_usage
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71 | //usage: "(with the above /etc/modules.conf):\n\n"
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72 | //usage: "$ modprobe tulip\n"
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73 | //usage: " will load the module 'tulip' with default option 'irq=3'\n\n"
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74 | //usage: "$ modprobe tulip irq=5\n"
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75 | //usage: " will load the module 'tulip' with option 'irq=5', thus overriding the default\n\n"
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76 | //usage: "$ modprobe tulip2\n"
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77 | //usage: " will load the module 'tulip' with default options 'irq=4 io=0x308',\n"
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78 | //usage: " which are the default for alias 'tulip2'\n\n"
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79 | //usage: "$ modprobe tulip2 irq=8\n"
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80 | //usage: " will load the module 'tulip' with default options 'irq=4 io=0x308 irq=8',\n"
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81 | //usage: " which are the default for alias 'tulip2' overridden by the option 'irq=8'\n\n"
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82 | //usage: " from the command line\n\n"
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83 | //usage: "$ modprobe tulip2 irq=2 io=0x210\n"
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84 | //usage: " will load the module 'tulip' with default options 'irq=4 io=0x308 irq=4 io=0x210',\n"
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85 | //usage: " which are the default for alias 'tulip2' overridden by the options 'irq=2 io=0x210'\n\n"
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86 | //usage: " from the command line\n"
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87 | //usage:
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88 | //usage:#define modprobe_trivial_usage
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89 | //usage: "[-alrqvsD" IF_FEATURE_MODPROBE_BLACKLIST("b") "]"
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90 | //usage: " MODULE [symbol=value]..."
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91 | //usage:#define modprobe_full_usage "\n\n"
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92 | //usage: " -a Load multiple MODULEs"
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93 | //usage: "\n -l List (MODULE is a pattern)"
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94 | //usage: "\n -r Remove MODULE (stacks) or do autoclean"
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95 | //usage: "\n -q Quiet"
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96 | //usage: "\n -v Verbose"
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97 | //usage: "\n -s Log to syslog"
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98 | //usage: "\n -D Show dependencies"
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99 | //usage: IF_FEATURE_MODPROBE_BLACKLIST(
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100 | //usage: "\n -b Apply blacklist to module names too"
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101 | //usage: )
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102 | //usage:#endif /* !ENABLE_MODPROBE_SMALL */
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103 |
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104 | /* Note: usage text doesn't document various 2.4 options
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105 | * we pull in through INSMOD_OPTS define
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106 | * Note2: -b is always accepted, but if !FEATURE_MODPROBE_BLACKLIST,
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107 | * it is a no-op.
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108 | */
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109 | #define MODPROBE_OPTS "alrDb"
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110 | /* -a and -D _are_ in fact compatible */
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111 | #define MODPROBE_COMPLEMENTARY ("q-v:v-q:l--arD:r--alD:a--lr:D--rl")
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112 | //#define MODPROBE_OPTS "acd:lnrt:C:b"
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113 | //#define MODPROBE_COMPLEMENTARY "q-v:v-q:l--acr:a--lr:r--al"
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114 | enum {
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115 | OPT_INSERT_ALL = (INSMOD_OPT_UNUSED << 0), /* a */
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116 | //OPT_DUMP_ONLY = (INSMOD_OPT_UNUSED << x), /* c */
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117 | //OPT_DIRNAME = (INSMOD_OPT_UNUSED << x), /* d */
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118 | OPT_LIST_ONLY = (INSMOD_OPT_UNUSED << 1), /* l */
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119 | //OPT_SHOW_ONLY = (INSMOD_OPT_UNUSED << x), /* n */
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120 | OPT_REMOVE = (INSMOD_OPT_UNUSED << 2), /* r */
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121 | //OPT_RESTRICT = (INSMOD_OPT_UNUSED << x), /* t */
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122 | //OPT_VERONLY = (INSMOD_OPT_UNUSED << x), /* V */
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123 | //OPT_CONFIGFILE = (INSMOD_OPT_UNUSED << x), /* C */
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124 | OPT_SHOW_DEPS = (INSMOD_OPT_UNUSED << 3), /* D */
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125 | OPT_BLACKLIST = (INSMOD_OPT_UNUSED << 4) * ENABLE_FEATURE_MODPROBE_BLACKLIST,
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126 | };
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127 | #if ENABLE_LONG_OPTS
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128 | static const char modprobe_longopts[] ALIGN1 =
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129 | /* nobody asked for long opts (yet) */
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130 | // "all\0" No_argument "a"
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131 | // "list\0" No_argument "l"
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132 | // "remove\0" No_argument "r"
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133 | // "quiet\0" No_argument "q"
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134 | // "verbose\0" No_argument "v"
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135 | // "syslog\0" No_argument "s"
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136 | /* module-init-tools 3.11.1 has only long opt --show-depends
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137 | * but no short -D, we provide long opt for scripts which
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138 | * were written for 3.11.1: */
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139 | "show-depends\0" No_argument "D"
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140 | // "use-blacklist\0" No_argument "b"
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141 | ;
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142 | #endif
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143 |
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144 | #define MODULE_FLAG_LOADED 0x0001
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145 | #define MODULE_FLAG_NEED_DEPS 0x0002
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146 | /* "was seen in modules.dep": */
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147 | #define MODULE_FLAG_FOUND_IN_MODDEP 0x0004
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148 | #define MODULE_FLAG_BLACKLISTED 0x0008
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149 |
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150 | struct module_entry { /* I'll call it ME. */
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151 | unsigned flags;
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152 | char *modname; /* stripped of /path/, .ext and s/-/_/g */
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153 | const char *probed_name; /* verbatim as seen on cmdline */
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154 | char *options; /* options from config files */
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155 | llist_t *realnames; /* strings. if this module is an alias, */
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156 | /* real module name is one of these. */
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157 | //Can there really be more than one? Example from real kernel?
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158 | llist_t *deps; /* strings. modules we depend on */
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159 | };
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160 |
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161 | #define DB_HASH_SIZE 256
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162 |
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163 | struct globals {
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164 | llist_t *probes; /* MEs of module(s) requested on cmdline */
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165 | char *cmdline_mopts; /* module options from cmdline */
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166 | int num_unresolved_deps;
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167 | /* bool. "Did we have 'symbol:FOO' requested on cmdline?" */
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168 | smallint need_symbols;
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169 | struct utsname uts;
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170 | llist_t *db[DB_HASH_SIZE]; /* MEs of all modules ever seen (caching for speed) */
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171 | } FIX_ALIASING;
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172 | #define G (*ptr_to_globals)
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173 | #define INIT_G() do { \
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174 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
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175 | } while (0)
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176 |
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177 |
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178 | static int read_config(const char *path);
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179 |
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180 | static char *gather_options_str(char *opts, const char *append)
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181 | {
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182 | /* Speed-optimized. We call gather_options_str many times. */
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183 | if (append) {
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184 | if (opts == NULL) {
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185 | opts = xstrdup(append);
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186 | } else {
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187 | int optlen = strlen(opts);
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188 | opts = xrealloc(opts, optlen + strlen(append) + 2);
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189 | sprintf(opts + optlen, " %s", append);
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190 | }
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191 | }
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192 | return opts;
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193 | }
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194 |
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195 | /* These three functions called many times, optimizing for speed.
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196 | * Users reported minute-long delays when they runn iptables repeatedly
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197 | * (iptables use modprobe to install needed kernel modules).
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198 | */
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199 | static struct module_entry *helper_get_module(const char *module, int create)
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200 | {
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201 | char modname[MODULE_NAME_LEN];
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202 | struct module_entry *e;
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203 | llist_t *l;
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204 | unsigned i;
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205 | unsigned hash;
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206 |
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207 | filename2modname(module, modname);
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208 |
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209 | hash = 0;
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210 | for (i = 0; modname[i]; i++)
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211 | hash = ((hash << 5) + hash) + modname[i];
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212 | hash %= DB_HASH_SIZE;
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213 |
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214 | for (l = G.db[hash]; l; l = l->link) {
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215 | e = (struct module_entry *) l->data;
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216 | if (strcmp(e->modname, modname) == 0)
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217 | return e;
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218 | }
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219 | if (!create)
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220 | return NULL;
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221 |
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222 | e = xzalloc(sizeof(*e));
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223 | e->modname = xstrdup(modname);
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224 | llist_add_to(&G.db[hash], e);
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225 |
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226 | return e;
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227 | }
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228 | static ALWAYS_INLINE struct module_entry *get_or_add_modentry(const char *module)
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229 | {
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230 | return helper_get_module(module, 1);
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231 | }
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232 | static ALWAYS_INLINE struct module_entry *get_modentry(const char *module)
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233 | {
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234 | return helper_get_module(module, 0);
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235 | }
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236 |
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237 | static void add_probe(const char *name)
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238 | {
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239 | struct module_entry *m;
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240 |
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241 | m = get_or_add_modentry(name);
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242 | if (!(option_mask32 & (OPT_REMOVE | OPT_SHOW_DEPS))
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243 | && (m->flags & MODULE_FLAG_LOADED)
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244 | ) {
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245 | DBG("skipping %s, it is already loaded", name);
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246 | return;
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247 | }
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248 |
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249 | DBG("queuing %s", name);
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250 | m->probed_name = name;
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251 | m->flags |= MODULE_FLAG_NEED_DEPS;
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252 | llist_add_to_end(&G.probes, m);
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253 | G.num_unresolved_deps++;
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254 | if (ENABLE_FEATURE_MODUTILS_SYMBOLS
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255 | && strncmp(m->modname, "symbol:", 7) == 0
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256 | ) {
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257 | G.need_symbols = 1;
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258 | }
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259 | }
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260 |
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261 | static int FAST_FUNC config_file_action(const char *filename,
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262 | struct stat *statbuf UNUSED_PARAM,
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263 | void *userdata UNUSED_PARAM,
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264 | int depth UNUSED_PARAM)
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265 | {
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266 | char *tokens[3];
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267 | parser_t *p;
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268 | struct module_entry *m;
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269 | int rc = TRUE;
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270 |
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271 | if (bb_basename(filename)[0] == '.')
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272 | goto error;
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273 |
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274 | p = config_open2(filename, fopen_for_read);
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275 | if (p == NULL) {
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276 | rc = FALSE;
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277 | goto error;
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278 | }
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279 |
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280 | while (config_read(p, tokens, 3, 2, "# \t", PARSE_NORMAL)) {
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281 | //Use index_in_strings?
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282 | if (strcmp(tokens[0], "alias") == 0) {
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283 | /* alias <wildcard> <modulename> */
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284 | llist_t *l;
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285 | char wildcard[MODULE_NAME_LEN];
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286 | char *rmod;
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287 |
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288 | if (tokens[2] == NULL)
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289 | continue;
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290 | filename2modname(tokens[1], wildcard);
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291 |
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292 | for (l = G.probes; l; l = l->link) {
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293 | m = (struct module_entry *) l->data;
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294 | if (fnmatch(wildcard, m->modname, 0) != 0)
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295 | continue;
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296 | rmod = filename2modname(tokens[2], NULL);
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297 | llist_add_to(&m->realnames, rmod);
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298 |
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299 | if (m->flags & MODULE_FLAG_NEED_DEPS) {
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300 | m->flags &= ~MODULE_FLAG_NEED_DEPS;
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301 | G.num_unresolved_deps--;
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302 | }
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303 |
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304 | m = get_or_add_modentry(rmod);
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305 | if (!(m->flags & MODULE_FLAG_NEED_DEPS)) {
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306 | m->flags |= MODULE_FLAG_NEED_DEPS;
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307 | G.num_unresolved_deps++;
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308 | }
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309 | }
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310 | } else if (strcmp(tokens[0], "options") == 0) {
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311 | /* options <modulename> <option...> */
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312 | if (tokens[2] == NULL)
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313 | continue;
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314 | m = get_or_add_modentry(tokens[1]);
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315 | m->options = gather_options_str(m->options, tokens[2]);
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316 | } else if (strcmp(tokens[0], "include") == 0) {
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317 | /* include <filename> */
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318 | read_config(tokens[1]);
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319 | } else if (ENABLE_FEATURE_MODPROBE_BLACKLIST
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320 | && strcmp(tokens[0], "blacklist") == 0
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321 | ) {
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322 | /* blacklist <modulename> */
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323 | get_or_add_modentry(tokens[1])->flags |= MODULE_FLAG_BLACKLISTED;
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324 | }
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325 | }
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326 | config_close(p);
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327 | error:
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328 | return rc;
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329 | }
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330 |
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331 | static int read_config(const char *path)
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332 | {
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333 | return recursive_action(path, ACTION_RECURSE | ACTION_QUIET,
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334 | config_file_action, NULL, NULL, 1);
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335 | }
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336 |
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337 | static const char *humanly_readable_name(struct module_entry *m)
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338 | {
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339 | /* probed_name may be NULL. modname always exists. */
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340 | return m->probed_name ? m->probed_name : m->modname;
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341 | }
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342 |
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343 | static char *parse_and_add_kcmdline_module_options(char *options, const char *modulename)
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344 | {
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345 | char *kcmdline_buf;
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346 | char *kcmdline;
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347 | char *kptr;
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348 | int len;
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349 |
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350 | kcmdline_buf = xmalloc_open_read_close("/proc/cmdline", NULL);
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351 | if (!kcmdline_buf)
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352 | return options;
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353 |
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354 | kcmdline = kcmdline_buf;
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355 | len = strlen(modulename);
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356 | while ((kptr = strsep(&kcmdline, "\n\t ")) != NULL) {
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357 | if (strncmp(modulename, kptr, len) != 0)
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358 | continue;
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359 | kptr += len;
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360 | if (*kptr != '.')
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361 | continue;
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362 | /* It is "modulename.xxxx" */
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363 | kptr++;
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364 | if (strchr(kptr, '=') != NULL) {
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365 | /* It is "modulename.opt=[val]" */
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366 | options = gather_options_str(options, kptr);
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367 | }
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368 | }
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369 | free(kcmdline_buf);
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370 |
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371 | return options;
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372 | }
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373 |
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374 | /* Return: similar to bb_init_module:
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375 | * 0 on success,
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376 | * -errno on open/read error,
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377 | * errno on init_module() error
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378 | */
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379 | /* NB: INSMOD_OPT_SILENT bit suppresses ONLY non-existent modules,
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380 | * not deleted ones (those are still listed in modules.dep).
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381 | * module-init-tools version 3.4:
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382 | * # modprobe bogus
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383 | * FATAL: Module bogus not found. [exitcode 1]
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384 | * # modprobe -q bogus [silent, exitcode still 1]
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385 | * but:
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386 | * # rm kernel/drivers/net/dummy.ko
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387 | * # modprobe -q dummy
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388 | * FATAL: Could not open '/lib/modules/xxx/kernel/drivers/net/dummy.ko': No such file or directory
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389 | * [exitcode 1]
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390 | */
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391 | static int do_modprobe(struct module_entry *m)
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392 | {
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393 | int rc, first;
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394 |
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395 | if (!(m->flags & MODULE_FLAG_FOUND_IN_MODDEP)) {
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396 | if (!(option_mask32 & INSMOD_OPT_SILENT))
|
---|
397 | bb_error_msg("module %s not found in modules.dep",
|
---|
398 | humanly_readable_name(m));
|
---|
399 | return -ENOENT;
|
---|
400 | }
|
---|
401 | DBG("do_modprob'ing %s", m->modname);
|
---|
402 |
|
---|
403 | if (!(option_mask32 & OPT_REMOVE))
|
---|
404 | m->deps = llist_rev(m->deps);
|
---|
405 |
|
---|
406 | if (0) {
|
---|
407 | llist_t *l;
|
---|
408 | for (l = m->deps; l; l = l->link)
|
---|
409 | DBG("dep: %s", l->data);
|
---|
410 | }
|
---|
411 |
|
---|
412 | first = 1;
|
---|
413 | rc = 0;
|
---|
414 | while (m->deps) {
|
---|
415 | struct module_entry *m2;
|
---|
416 | char *fn, *options;
|
---|
417 |
|
---|
418 | rc = 0;
|
---|
419 | fn = llist_pop(&m->deps); /* we leak it */
|
---|
420 | m2 = get_or_add_modentry(fn);
|
---|
421 |
|
---|
422 | if (option_mask32 & OPT_REMOVE) {
|
---|
423 | /* modprobe -r */
|
---|
424 | if (m2->flags & MODULE_FLAG_LOADED) {
|
---|
425 | rc = bb_delete_module(m2->modname, O_EXCL);
|
---|
426 | if (rc) {
|
---|
427 | if (first) {
|
---|
428 | bb_error_msg("can't unload module %s: %s",
|
---|
429 | humanly_readable_name(m2),
|
---|
430 | moderror(rc));
|
---|
431 | break;
|
---|
432 | }
|
---|
433 | } else {
|
---|
434 | m2->flags &= ~MODULE_FLAG_LOADED;
|
---|
435 | }
|
---|
436 | }
|
---|
437 | /* do not error out if *deps* fail to unload */
|
---|
438 | first = 0;
|
---|
439 | continue;
|
---|
440 | }
|
---|
441 |
|
---|
442 | options = m2->options;
|
---|
443 | m2->options = NULL;
|
---|
444 | options = parse_and_add_kcmdline_module_options(options, m2->modname);
|
---|
445 | if (m == m2)
|
---|
446 | options = gather_options_str(options, G.cmdline_mopts);
|
---|
447 |
|
---|
448 | if (option_mask32 & OPT_SHOW_DEPS) {
|
---|
449 | printf(options ? "insmod %s/%s/%s %s\n"
|
---|
450 | : "insmod %s/%s/%s\n",
|
---|
451 | CONFIG_DEFAULT_MODULES_DIR, G.uts.release, fn,
|
---|
452 | options);
|
---|
453 | free(options);
|
---|
454 | continue;
|
---|
455 | }
|
---|
456 |
|
---|
457 | if (m2->flags & MODULE_FLAG_LOADED) {
|
---|
458 | DBG("%s is already loaded, skipping", fn);
|
---|
459 | free(options);
|
---|
460 | continue;
|
---|
461 | }
|
---|
462 |
|
---|
463 | rc = bb_init_module(fn, options);
|
---|
464 | DBG("loaded %s '%s', rc:%d", fn, options, rc);
|
---|
465 | if (rc == EEXIST)
|
---|
466 | rc = 0;
|
---|
467 | free(options);
|
---|
468 | if (rc) {
|
---|
469 | bb_error_msg("can't load module %s (%s): %s",
|
---|
470 | humanly_readable_name(m2),
|
---|
471 | fn,
|
---|
472 | moderror(rc)
|
---|
473 | );
|
---|
474 | break;
|
---|
475 | }
|
---|
476 | m2->flags |= MODULE_FLAG_LOADED;
|
---|
477 | }
|
---|
478 |
|
---|
479 | return rc;
|
---|
480 | }
|
---|
481 |
|
---|
482 | static void load_modules_dep(void)
|
---|
483 | {
|
---|
484 | struct module_entry *m;
|
---|
485 | char *colon, *tokens[2];
|
---|
486 | parser_t *p;
|
---|
487 |
|
---|
488 | /* Modprobe does not work at all without modules.dep,
|
---|
489 | * even if the full module name is given. Returning error here
|
---|
490 | * was making us later confuse user with this message:
|
---|
491 | * "module /full/path/to/existing/file/module.ko not found".
|
---|
492 | * It's better to die immediately, with good message.
|
---|
493 | * xfopen_for_read provides that. */
|
---|
494 | p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, xfopen_for_read);
|
---|
495 |
|
---|
496 | while (G.num_unresolved_deps
|
---|
497 | && config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)
|
---|
498 | ) {
|
---|
499 | colon = last_char_is(tokens[0], ':');
|
---|
500 | if (colon == NULL)
|
---|
501 | continue;
|
---|
502 | *colon = 0;
|
---|
503 |
|
---|
504 | m = get_modentry(tokens[0]);
|
---|
505 | if (m == NULL)
|
---|
506 | continue;
|
---|
507 |
|
---|
508 | /* Optimization... */
|
---|
509 | if ((m->flags & MODULE_FLAG_LOADED)
|
---|
510 | && !(option_mask32 & (OPT_REMOVE | OPT_SHOW_DEPS))
|
---|
511 | ) {
|
---|
512 | DBG("skip deps of %s, it's already loaded", tokens[0]);
|
---|
513 | continue;
|
---|
514 | }
|
---|
515 |
|
---|
516 | m->flags |= MODULE_FLAG_FOUND_IN_MODDEP;
|
---|
517 | if ((m->flags & MODULE_FLAG_NEED_DEPS) && (m->deps == NULL)) {
|
---|
518 | G.num_unresolved_deps--;
|
---|
519 | llist_add_to(&m->deps, xstrdup(tokens[0]));
|
---|
520 | if (tokens[1])
|
---|
521 | string_to_llist(tokens[1], &m->deps, " \t");
|
---|
522 | } else
|
---|
523 | DBG("skipping dep line");
|
---|
524 | }
|
---|
525 | config_close(p);
|
---|
526 | }
|
---|
527 |
|
---|
528 | int modprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
529 | int modprobe_main(int argc UNUSED_PARAM, char **argv)
|
---|
530 | {
|
---|
531 | int rc;
|
---|
532 | unsigned opt;
|
---|
533 | struct module_entry *me;
|
---|
534 |
|
---|
535 | INIT_G();
|
---|
536 |
|
---|
537 | IF_LONG_OPTS(applet_long_options = modprobe_longopts;)
|
---|
538 | opt_complementary = MODPROBE_COMPLEMENTARY;
|
---|
539 | opt = getopt32(argv, INSMOD_OPTS MODPROBE_OPTS INSMOD_ARGS);
|
---|
540 | argv += optind;
|
---|
541 |
|
---|
542 | /* Goto modules location */
|
---|
543 | xchdir(CONFIG_DEFAULT_MODULES_DIR);
|
---|
544 | uname(&G.uts);
|
---|
545 | xchdir(G.uts.release);
|
---|
546 |
|
---|
547 | if (opt & OPT_LIST_ONLY) {
|
---|
548 | int i;
|
---|
549 | char name[MODULE_NAME_LEN];
|
---|
550 | char *colon, *tokens[2];
|
---|
551 | parser_t *p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, xfopen_for_read);
|
---|
552 |
|
---|
553 | for (i = 0; argv[i]; i++)
|
---|
554 | replace(argv[i], '-', '_');
|
---|
555 |
|
---|
556 | while (config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)) {
|
---|
557 | colon = last_char_is(tokens[0], ':');
|
---|
558 | if (!colon)
|
---|
559 | continue;
|
---|
560 | *colon = '\0';
|
---|
561 | filename2modname(tokens[0], name);
|
---|
562 | if (!argv[0])
|
---|
563 | puts(tokens[0]);
|
---|
564 | else {
|
---|
565 | for (i = 0; argv[i]; i++) {
|
---|
566 | if (fnmatch(argv[i], name, 0) == 0) {
|
---|
567 | puts(tokens[0]);
|
---|
568 | }
|
---|
569 | }
|
---|
570 | }
|
---|
571 | }
|
---|
572 | return EXIT_SUCCESS;
|
---|
573 | }
|
---|
574 |
|
---|
575 | /* Yes, for some reason -l ignores -s... */
|
---|
576 | if (opt & INSMOD_OPT_SYSLOG)
|
---|
577 | logmode = LOGMODE_SYSLOG;
|
---|
578 |
|
---|
579 | if (!argv[0]) {
|
---|
580 | if (opt & OPT_REMOVE) {
|
---|
581 | /* "modprobe -r" (w/o params).
|
---|
582 | * "If name is NULL, all unused modules marked
|
---|
583 | * autoclean will be removed".
|
---|
584 | */
|
---|
585 | if (bb_delete_module(NULL, O_NONBLOCK | O_EXCL) != 0)
|
---|
586 | bb_perror_msg_and_die("rmmod");
|
---|
587 | }
|
---|
588 | return EXIT_SUCCESS;
|
---|
589 | }
|
---|
590 |
|
---|
591 | /* Retrieve module names of already loaded modules */
|
---|
592 | {
|
---|
593 | char *s;
|
---|
594 | parser_t *parser = config_open2("/proc/modules", fopen_for_read);
|
---|
595 | while (config_read(parser, &s, 1, 1, "# \t", PARSE_NORMAL & ~PARSE_GREEDY))
|
---|
596 | get_or_add_modentry(s)->flags |= MODULE_FLAG_LOADED;
|
---|
597 | config_close(parser);
|
---|
598 | }
|
---|
599 |
|
---|
600 | if (opt & (OPT_INSERT_ALL | OPT_REMOVE)) {
|
---|
601 | /* Each argument is a module name */
|
---|
602 | do {
|
---|
603 | DBG("adding module %s", *argv);
|
---|
604 | add_probe(*argv++);
|
---|
605 | } while (*argv);
|
---|
606 | } else {
|
---|
607 | /* First argument is module name, rest are parameters */
|
---|
608 | DBG("probing just module %s", *argv);
|
---|
609 | add_probe(argv[0]);
|
---|
610 | G.cmdline_mopts = parse_cmdline_module_options(argv, /*quote_spaces:*/ 1);
|
---|
611 | }
|
---|
612 |
|
---|
613 | /* Happens if all requested modules are already loaded */
|
---|
614 | if (G.probes == NULL)
|
---|
615 | return EXIT_SUCCESS;
|
---|
616 |
|
---|
617 | read_config("/etc/modprobe.conf");
|
---|
618 | read_config("/etc/modprobe.d");
|
---|
619 | if (ENABLE_FEATURE_MODUTILS_SYMBOLS && G.need_symbols)
|
---|
620 | read_config("modules.symbols");
|
---|
621 | load_modules_dep();
|
---|
622 | if (ENABLE_FEATURE_MODUTILS_ALIAS && G.num_unresolved_deps) {
|
---|
623 | read_config("modules.alias");
|
---|
624 | load_modules_dep();
|
---|
625 | }
|
---|
626 |
|
---|
627 | rc = 0;
|
---|
628 | while ((me = llist_pop(&G.probes)) != NULL) {
|
---|
629 | if (me->realnames == NULL) {
|
---|
630 | DBG("probing by module name");
|
---|
631 | /* This is not an alias. Literal names are blacklisted
|
---|
632 | * only if '-b' is given.
|
---|
633 | */
|
---|
634 | if (!(opt & OPT_BLACKLIST)
|
---|
635 | || !(me->flags & MODULE_FLAG_BLACKLISTED)
|
---|
636 | ) {
|
---|
637 | rc |= do_modprobe(me);
|
---|
638 | }
|
---|
639 | continue;
|
---|
640 | }
|
---|
641 |
|
---|
642 | /* Probe all real names for the alias */
|
---|
643 | do {
|
---|
644 | char *realname = llist_pop(&me->realnames);
|
---|
645 | struct module_entry *m2;
|
---|
646 |
|
---|
647 | DBG("probing alias %s by realname %s", me->modname, realname);
|
---|
648 | m2 = get_or_add_modentry(realname);
|
---|
649 | if (!(m2->flags & MODULE_FLAG_BLACKLISTED)
|
---|
650 | && (!(m2->flags & MODULE_FLAG_LOADED)
|
---|
651 | || (opt & (OPT_REMOVE | OPT_SHOW_DEPS)))
|
---|
652 | ) {
|
---|
653 | //TODO: we can pass "me" as 2nd param to do_modprobe,
|
---|
654 | //and make do_modprobe emit more meaningful error messages
|
---|
655 | //with alias name included, not just module name alias resolves to.
|
---|
656 | rc |= do_modprobe(m2);
|
---|
657 | }
|
---|
658 | free(realname);
|
---|
659 | } while (me->realnames != NULL);
|
---|
660 | }
|
---|
661 |
|
---|
662 | return (rc != 0);
|
---|
663 | }
|
---|