1 | <?php |
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2 | /** |
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3 | * Config.php |
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4 | * |
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5 | * Config convenience class to access and set config variables. |
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6 | * |
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7 | * This program is free software: you can redistribute it and/or modify |
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8 | * it under the terms of the GNU General Public License as published by |
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9 | * the Free Software Foundation, either version 3 of the License, or |
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10 | * (at your option) any later version. |
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11 | * |
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12 | * This program is distributed in the hope that it will be useful, |
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the |
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15 | * GNU General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU General Public License |
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18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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19 | * |
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20 | * @package LibreNMS |
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21 | * @link http://librenms.org |
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22 | * @copyright 2017 Tony Murray |
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23 | * @author Tony Murray <[email protected]> |
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24 | */ |
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25 | |||
26 | namespace LibreNMS; |
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27 | |||
28 | use App\Models\GraphType; |
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29 | use Illuminate\Database\QueryException; |
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30 | use Illuminate\Support\Arr; |
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31 | use LibreNMS\DB\Eloquent; |
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32 | |||
33 | class Config |
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34 | { |
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35 | private static $config; |
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36 | |||
37 | /** |
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38 | * Load the config, if the database connected, pull in database settings. |
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39 | * |
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40 | * return &array |
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41 | */ |
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42 | public static function load() |
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43 | { |
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44 | if (!is_null(self::$config)) { |
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45 | return self::$config; |
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46 | } |
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47 | |||
48 | self::loadFiles(); |
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49 | |||
50 | // Make sure the database is connected |
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51 | if (Eloquent::isConnected()) { |
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52 | // pull in the database config settings |
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53 | self::mergeDb(); |
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54 | |||
55 | // load graph types from the database |
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56 | self::loadGraphsFromDb(); |
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57 | |||
58 | // process $config to tidy up |
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59 | self::processConfig(true); |
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60 | } else { |
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61 | // just process $config |
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62 | self::processConfig(false); |
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63 | } |
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64 | |||
65 | // set to global for legacy/external things |
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66 | global $config; |
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67 | $config = self::$config; |
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68 | |||
69 | return self::$config; |
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70 | } |
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71 | |||
72 | /** |
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73 | * Reload the config from files/db |
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74 | * @return mixed |
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75 | */ |
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76 | public static function reload() |
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77 | { |
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78 | self::$config = null; |
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79 | return self::load(); |
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80 | } |
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81 | |||
82 | /** |
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83 | * Load the user config from config.php, defaults.inc.php and definitions.inc.php, etc. |
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84 | * Erases existing config. |
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85 | * |
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86 | * @return array |
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87 | */ |
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88 | private static function &loadFiles() |
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89 | { |
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90 | $config = []; // start fresh |
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91 | |||
92 | $install_dir = realpath(__DIR__ . '/../'); |
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93 | $config['install_dir'] = $install_dir; |
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94 | |||
95 | // load defaults |
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96 | require $install_dir . '/includes/defaults.inc.php'; |
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97 | require $install_dir . '/includes/definitions.inc.php'; |
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98 | |||
99 | // import standard settings |
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100 | $macros = json_decode(file_get_contents($install_dir . '/misc/macros.json'), true); |
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101 | $config['alert']['macros']['rule'] = $macros; |
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102 | |||
103 | // Load user config |
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104 | @include $install_dir . '/config.php'; |
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105 | |||
106 | // set it |
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107 | self::$config = $config; |
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108 | |||
109 | return self::$config; |
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110 | } |
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111 | |||
112 | |||
113 | /** |
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114 | * Get a config value, if non existent null (or default if set) will be returned |
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115 | * |
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116 | * @param string $key period separated config variable name |
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117 | * @param mixed $default optional value to return if the setting is not set |
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118 | * @return mixed |
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119 | */ |
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120 | public static function get($key, $default = null) |
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121 | { |
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122 | if (isset(self::$config[$key])) { |
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123 | return self::$config[$key]; |
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124 | } |
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125 | |||
126 | if (!str_contains($key, '.')) { |
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127 | return $default; |
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128 | } |
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129 | |||
130 | $keys = explode('.', $key); |
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131 | |||
132 | $curr = &self::$config; |
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133 | foreach ($keys as $k) { |
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134 | // do not add keys that don't exist |
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135 | if (!isset($curr[$k])) { |
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136 | return $default; |
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137 | } |
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138 | $curr = &$curr[$k]; |
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139 | } |
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140 | |||
141 | if (is_null($curr)) { |
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142 | return $default; |
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143 | } |
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144 | |||
145 | return $curr; |
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146 | } |
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147 | |||
148 | /** |
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149 | * Unset a config setting |
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150 | * or multiple |
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151 | * |
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152 | * @param string|array $key |
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153 | */ |
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154 | public static function forget($key) |
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155 | { |
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156 | Arr::forget(self::$config, $key); |
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157 | } |
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158 | |||
159 | /** |
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160 | * Get a setting from a device, if that is not set, |
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161 | * fall back to the global config setting prefixed by $global_prefix |
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162 | * The key must be the same for the global setting and the device setting. |
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163 | * |
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164 | * @param array $device Device array |
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165 | * @param string $key Name of setting to fetch |
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166 | * @param string $global_prefix specify where the global setting lives in the global config |
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167 | * @param mixed $default will be returned if the setting is not set on the device or globally |
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168 | * @return mixed |
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169 | */ |
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170 | public static function getDeviceSetting($device, $key, $global_prefix = null, $default = null) |
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171 | { |
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172 | if (isset($device[$key])) { |
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173 | return $device[$key]; |
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174 | } |
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175 | |||
176 | if (isset($global_prefix)) { |
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177 | $key = "$global_prefix.$key"; |
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178 | } |
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179 | |||
180 | return self::get($key, $default); |
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181 | } |
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182 | |||
183 | /** |
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184 | * Get a setting from the $config['os'] array using the os of the given device |
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185 | * If that is not set, fallback to the same global config key |
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186 | * |
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187 | * @param string $os The os name |
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188 | * @param string $key period separated config variable name |
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189 | * @param mixed $default optional value to return if the setting is not set |
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190 | * @return mixed |
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191 | */ |
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192 | public static function getOsSetting($os, $key, $default = null) |
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193 | { |
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194 | if ($os) { |
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195 | if (isset(self::$config['os'][$os][$key])) { |
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196 | return self::$config['os'][$os][$key]; |
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197 | } |
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198 | |||
199 | if (!str_contains($key, '.')) { |
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200 | return self::get($key, $default); |
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201 | } |
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202 | |||
203 | $os_key = "os.$os.$key"; |
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204 | if (self::has($os_key)) { |
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205 | return self::get($os_key); |
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206 | } |
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207 | } |
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208 | |||
209 | return self::get($key, $default); |
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210 | } |
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211 | |||
212 | /** |
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213 | * Get the merged array from the global and os settings for the specified key. |
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214 | * Removes any duplicates. |
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215 | * When the arrays have keys, os settings take precedence over global settings |
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216 | * |
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217 | * @param string $os The os name |
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218 | * @param string $key period separated config variable name |
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219 | * @param array $default optional array to return if the setting is not set |
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220 | * @return array |
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221 | */ |
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222 | public static function getCombined($os, $key, $default = array()) |
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223 | { |
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224 | if (!self::has($key)) { |
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225 | return self::get("os.$os.$key", $default); |
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226 | } |
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227 | |||
228 | if (!isset(self::$config['os'][$os][$key])) { |
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229 | if (!str_contains($key, '.')) { |
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230 | return self::get($key, $default); |
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231 | } |
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232 | if (!self::has("os.$os.$key")) { |
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233 | return self::get($key, $default); |
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234 | } |
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235 | } |
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236 | |||
237 | return array_unique(array_merge( |
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238 | (array)self::get($key, $default), |
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239 | (array)self::getOsSetting($os, $key, $default) |
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240 | )); |
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241 | } |
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242 | |||
243 | /** |
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244 | * Set a variable in the global config |
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245 | * |
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246 | * @param mixed $key period separated config variable name |
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247 | * @param mixed $value |
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248 | * @param bool $persist set the setting in the database so it persists across runs |
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249 | * @param string $default default (only set when initially created) |
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250 | * @param string $descr webui description (only set when initially created) |
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251 | * @param string $group webui group (only set when initially created) |
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252 | * @param string $sub_group webui subgroup (only set when initially created) |
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253 | */ |
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254 | public static function set($key, $value, $persist = false, $default = null, $descr = null, $group = null, $sub_group = null) |
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255 | { |
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256 | if ($persist) { |
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257 | try { |
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258 | \App\Models\Config::updateOrCreate(['config_name' => $key], collect([ |
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259 | 'config_name' => $key, |
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260 | 'config_default' => $default, |
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261 | 'config_descr' => $descr, |
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262 | 'config_group' => $group, |
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263 | 'config_sub_group' => $sub_group, |
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264 | ])->filter(function ($value, $field) { |
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265 | return !is_null($value); |
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266 | })->put('config_value', $value)->toArray()); |
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267 | } catch (QueryException $e) { |
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268 | if (class_exists(\Log::class)) { |
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269 | \Log::error($e); |
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270 | } |
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271 | global $debug; |
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272 | if ($debug) { |
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273 | echo $e; |
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274 | } |
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275 | } |
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276 | } |
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277 | |||
278 | $keys = explode('.', $key); |
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279 | |||
280 | $curr = &self::$config; |
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281 | foreach ($keys as $k) { |
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282 | $curr = &$curr[$k]; |
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283 | } |
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284 | |||
285 | $curr = $value; |
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286 | } |
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287 | |||
288 | /** |
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289 | * Check if a setting is set |
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290 | * |
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291 | * @param string $key period separated config variable name |
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292 | * @return bool |
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293 | */ |
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294 | public static function has($key) |
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295 | { |
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296 | if (isset(self::$config[$key])) { |
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297 | return true; |
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298 | } |
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299 | |||
300 | if (!str_contains($key, '.')) { |
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301 | return false; |
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302 | } |
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303 | |||
304 | $keys = explode('.', $key); |
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305 | $last = array_pop($keys); |
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306 | |||
307 | $curr = &self::$config; |
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308 | foreach ($keys as $k) { |
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309 | // do not add keys that don't exist |
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310 | if (!isset($curr[$k])) { |
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311 | return false; |
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312 | } |
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313 | $curr = &$curr[$k]; |
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314 | } |
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315 | |||
316 | return is_array($curr) && isset($curr[$last]); |
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317 | } |
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318 | |||
319 | /** |
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320 | * Serialise the whole configuration to json for use in external processes. |
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321 | * |
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322 | * @return string |
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323 | */ |
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324 | public static function json_encode() |
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325 | { |
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326 | return json_encode(self::$config); |
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327 | } |
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328 | |||
329 | /** |
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330 | * Get the full configuration array |
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331 | * @return array |
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332 | */ |
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333 | public static function getAll() |
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334 | { |
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335 | return self::$config; |
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336 | } |
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337 | |||
338 | /** |
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339 | * merge the database config with the global config |
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340 | * Global config overrides db |
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341 | */ |
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342 | private static function mergeDb() |
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343 | { |
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344 | $db_config = []; |
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345 | |||
346 | try { |
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347 | \App\Models\Config::get(['config_name', 'config_value']) |
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348 | ->each(function ($item) use (&$db_config) { |
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349 | Arr::set($db_config, $item->config_name, $item->config_value); |
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350 | }); |
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351 | } catch (QueryException $e) { |
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352 | // possibly table config doesn't exist yet |
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353 | } |
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354 | |||
355 | self::$config = array_replace_recursive($db_config, self::$config); |
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356 | } |
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357 | |||
358 | private static function loadGraphsFromDb() |
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359 | { |
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360 | try { |
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361 | $graph_types = GraphType::all()->toArray(); |
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362 | } catch (QueryException $e) { |
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363 | // possibly table config doesn't exist yet |
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364 | $graph_types = []; |
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365 | } |
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366 | |||
367 | // load graph types from the database |
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368 | foreach ($graph_types as $graph) { |
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369 | $g = []; |
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370 | foreach ($graph as $k => $v) { |
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371 | if (strpos($k, 'graph_') == 0) { |
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372 | // remove leading 'graph_' from column name |
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373 | $key = str_replace('graph_', '', $k); |
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374 | } else { |
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375 | $key = $k; |
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376 | } |
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377 | $g[$key] = $v; |
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378 | } |
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379 | |||
380 | self::$config['graph_types'][$g['type']][$g['subtype']] = $g; |
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381 | } |
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382 | } |
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383 | |||
384 | /** |
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385 | * Proces the config after it has been loaded. |
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386 | * Make sure certain variables have been set properly and |
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387 | * |
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388 | * @param bool $persist Save binary locations and other settings to the database. |
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389 | */ |
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390 | private static function processConfig($persist = true) |
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391 | { |
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392 | if (!self::get('email_from')) { |
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393 | self::set('email_from', '"' . self::get('project_name') . '" <' . self::get('email_user') . '@' . php_uname('n') . '>'); |
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394 | } |
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395 | |||
396 | // If we're on SSL, let's properly detect it |
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397 | if (isset($_SERVER['HTTPS'])) { |
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398 | self::set('base_url', preg_replace('/^http:/', 'https:', self::get('base_url'))); |
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399 | } |
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400 | |||
401 | // Define some variables if they aren't set by user definition in config.php |
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402 | self::setDefault('html_dir', '%s/html', ['install_dir']); |
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403 | self::setDefault('rrd_dir', '%s/rrd', ['install_dir']); |
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404 | self::setDefault('mib_dir', '%s/mibs', ['install_dir']); |
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405 | self::setDefault('log_dir', '%s/logs', ['install_dir']); |
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406 | self::setDefault('log_file', '%s/%s.log', ['log_dir', 'project_id']); |
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407 | self::setDefault('plugin_dir', '%s/plugins', ['html_dir']); |
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408 | self::setDefault('temp_dir', sys_get_temp_dir() ?: '/tmp'); |
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409 | // self::setDefault('email_from', '"%s" <%s@' . php_uname('n') . '>', ['project_name', 'email_user']); // FIXME email_from set because alerting config |
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410 | |||
411 | // deprecated variables |
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412 | self::deprecatedVariable('rrdgraph_real_95th', 'rrdgraph_real_percentile'); |
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413 | self::deprecatedVariable('fping_options.millisec', 'fping_options.interval'); |
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414 | self::deprecatedVariable('discovery_modules.cisco-vrf', 'discovery_modules.vrf'); |
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415 | self::deprecatedVariable('oxidized.group', 'oxidized.maps.group'); |
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416 | |||
417 | // make sure we have full path to binaries in case PATH isn't set |
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418 | foreach (array('fping', 'fping6', 'snmpgetnext', 'rrdtool', 'traceroute', 'traceroute6') as $bin) { |
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419 | if (!is_executable(self::get($bin))) { |
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420 | self::set($bin, self::locateBinary($bin), $persist, $bin, "Path to $bin", 'external', 'paths'); |
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421 | } |
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422 | } |
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423 | } |
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424 | |||
425 | /** |
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426 | * Set default values for defaults that depend on other settings, if they are not already loaded |
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427 | * |
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428 | * @param string $key |
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429 | * @param string $value value to set to key or vsprintf() format string for values below |
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430 | * @param array $format_values array of keys to send to vsprintf() |
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431 | */ |
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432 | private static function setDefault($key, $value, $format_values = []) |
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433 | { |
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434 | if (!self::has($key)) { |
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435 | if (is_string($value)) { |
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436 | $format_values = array_map('self::get', $format_values); |
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437 | self::set($key, vsprintf($value, $format_values)); |
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438 | } else { |
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439 | self::set($key, $value); |
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440 | } |
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441 | } |
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442 | } |
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443 | |||
444 | /** |
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445 | * Copy data from old variables to new ones. |
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446 | * |
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447 | * @param $old |
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448 | * @param $new |
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449 | */ |
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450 | private static function deprecatedVariable($old, $new) |
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451 | { |
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452 | if (self::has($old)) { |
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453 | global $debug; |
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454 | if ($debug) { |
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455 | echo "Copied deprecated config $old to $new\n"; |
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456 | } |
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457 | self::set($new, self::get($old)); |
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458 | } |
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459 | } |
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460 | |||
461 | /** |
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462 | * Get just the database connection settings from config.php |
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463 | * |
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464 | * @return array (keys: db_host, db_port, db_name, db_user, db_pass, db_socket) |
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465 | */ |
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466 | public static function getDatabaseSettings() |
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467 | { |
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468 | // Do not access global $config in this function! |
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469 | |||
470 | $keys = $config = [ |
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471 | 'db_host' => '', |
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472 | 'db_port' => '', |
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473 | 'db_name' => '', |
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474 | 'db_user' => '', |
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475 | 'db_pass' => '', |
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476 | 'db_socket' => '', |
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477 | ]; |
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478 | |||
479 | if (is_file(__DIR__ . '/../config.php')) { |
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480 | include __DIR__ . '/../config.php'; |
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481 | } |
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482 | |||
483 | // Check for testing database |
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484 | if (isset($config['test_db_name'])) { |
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485 | putenv('DB_TEST_DATABASE=' . $config['test_db_name']); |
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486 | } |
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487 | if (isset($config['test_db_user'])) { |
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488 | putenv('DB_TEST_USERNAME=' . $config['test_db_user']); |
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489 | } |
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490 | if (isset($config['test_db_pass'])) { |
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491 | putenv('DB_TEST_PASSWORD=' . $config['test_db_pass']); |
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492 | } |
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493 | |||
494 | return array_intersect_key($config, $keys); // return only the db settings |
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495 | } |
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496 | |||
497 | /** |
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498 | * Locate the actual path of a binary |
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499 | * |
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500 | * @param $binary |
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501 | * @return mixed |
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502 | */ |
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503 | public static function locateBinary($binary) |
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504 | { |
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505 | if (!str_contains($binary, '/')) { |
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506 | $output = `whereis -b $binary`; |
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507 | $list = trim(substr($output, strpos($output, ':') + 1)); |
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508 | $targets = explode(' ', $list); |
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509 | foreach ($targets as $target) { |
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510 | if (is_executable($target)) { |
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511 | return $target; |
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512 | } |
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513 | } |
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514 | } |
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515 | return $binary; |
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516 | } |
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517 | } |
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518 |
Instead of relying on
global
state, we recommend one of these alternatives:1. Pass all data via parameters
2. Create a class that maintains your state