CliPhp.php
6 years ago
Output.php
6 years ago
Process.php
6 years ago
RequestCommand.php
6 years ago
Process.php
274 lines
| 1 | <?php |
| 2 | /** |
| 3 | * Piwik - free/libre analytics platform |
| 4 | * |
| 5 | * @link https://matomo.org |
| 6 | * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later |
| 7 | */ |
| 8 | namespace Piwik\CliMulti; |
| 9 | |
| 10 | use Piwik\CliMulti; |
| 11 | use Piwik\Filesystem; |
| 12 | use Piwik\SettingsServer; |
| 13 | |
| 14 | /** |
| 15 | * There are three different states |
| 16 | * - PID file exists with empty content: Process is created but not started |
| 17 | * - PID file exists with the actual process PID as content: Process is running |
| 18 | * - PID file does not exist: Process is marked as finished |
| 19 | * |
| 20 | * Class Process |
| 21 | */ |
| 22 | class Process |
| 23 | { |
| 24 | private $pidFile = ''; |
| 25 | private $timeCreation = null; |
| 26 | private $isSupported = null; |
| 27 | private $pid = null; |
| 28 | |
| 29 | public function __construct($pid) |
| 30 | { |
| 31 | if (!Filesystem::isValidFilename($pid)) { |
| 32 | throw new \Exception('The given pid has an invalid format'); |
| 33 | } |
| 34 | |
| 35 | $pidDir = CliMulti::getTmpPath(); |
| 36 | Filesystem::mkdir($pidDir); |
| 37 | |
| 38 | $this->isSupported = self::isSupported(); |
| 39 | $this->pidFile = $pidDir . '/' . $pid . '.pid'; |
| 40 | $this->timeCreation = time(); |
| 41 | $this->pid = $pid; |
| 42 | |
| 43 | $this->markAsNotStarted(); |
| 44 | } |
| 45 | |
| 46 | public function getPid() |
| 47 | { |
| 48 | return $this->pid; |
| 49 | } |
| 50 | |
| 51 | private function markAsNotStarted() |
| 52 | { |
| 53 | $content = $this->getPidFileContent(); |
| 54 | |
| 55 | if ($this->doesPidFileExist($content)) { |
| 56 | return; |
| 57 | } |
| 58 | |
| 59 | $this->writePidFileContent(''); |
| 60 | } |
| 61 | |
| 62 | public function hasStarted($content = null) |
| 63 | { |
| 64 | if (is_null($content)) { |
| 65 | $content = $this->getPidFileContent(); |
| 66 | } |
| 67 | |
| 68 | if (!$this->doesPidFileExist($content)) { |
| 69 | // process is finished, this means there was a start before |
| 70 | return true; |
| 71 | } |
| 72 | |
| 73 | if ('' === trim($content)) { |
| 74 | // pid file is overwritten by startProcess() |
| 75 | return false; |
| 76 | } |
| 77 | |
| 78 | // process is probably running or pid file was not removed |
| 79 | return true; |
| 80 | } |
| 81 | |
| 82 | public function hasFinished() |
| 83 | { |
| 84 | $content = $this->getPidFileContent(); |
| 85 | |
| 86 | return !$this->doesPidFileExist($content); |
| 87 | } |
| 88 | |
| 89 | public function getSecondsSinceCreation() |
| 90 | { |
| 91 | return time() - $this->timeCreation; |
| 92 | } |
| 93 | |
| 94 | public function startProcess() |
| 95 | { |
| 96 | $this->writePidFileContent(getmypid()); |
| 97 | } |
| 98 | |
| 99 | public function isRunning() |
| 100 | { |
| 101 | $content = $this->getPidFileContent(); |
| 102 | |
| 103 | if (!$this->doesPidFileExist($content)) { |
| 104 | return false; |
| 105 | } |
| 106 | |
| 107 | if (!$this->pidFileSizeIsNormal()) { |
| 108 | $this->finishProcess(); |
| 109 | return false; |
| 110 | } |
| 111 | |
| 112 | if ($this->isProcessStillRunning($content)) { |
| 113 | return true; |
| 114 | } |
| 115 | |
| 116 | if ($this->hasStarted($content)) { |
| 117 | $this->finishProcess(); |
| 118 | } |
| 119 | |
| 120 | return false; |
| 121 | } |
| 122 | |
| 123 | private function pidFileSizeIsNormal() |
| 124 | { |
| 125 | $size = Filesystem::getFileSize($this->pidFile); |
| 126 | |
| 127 | return $size !== null && $size < 500; |
| 128 | } |
| 129 | |
| 130 | public function finishProcess() |
| 131 | { |
| 132 | Filesystem::deleteFileIfExists($this->pidFile); |
| 133 | } |
| 134 | |
| 135 | private function doesPidFileExist($content) |
| 136 | { |
| 137 | return false !== $content; |
| 138 | } |
| 139 | |
| 140 | private function isProcessStillRunning($content) |
| 141 | { |
| 142 | if (!$this->isSupported) { |
| 143 | return true; |
| 144 | } |
| 145 | |
| 146 | $lockedPID = trim($content); |
| 147 | $runningPIDs = self::getRunningProcesses(); |
| 148 | |
| 149 | return !empty($lockedPID) && in_array($lockedPID, $runningPIDs); |
| 150 | } |
| 151 | |
| 152 | private function getPidFileContent() |
| 153 | { |
| 154 | return @file_get_contents($this->pidFile); |
| 155 | } |
| 156 | |
| 157 | private function writePidFileContent($content) |
| 158 | { |
| 159 | file_put_contents($this->pidFile, $content); |
| 160 | } |
| 161 | |
| 162 | public static function isSupported() |
| 163 | { |
| 164 | if (SettingsServer::isWindows()) { |
| 165 | return false; |
| 166 | } |
| 167 | |
| 168 | if (self::isMethodDisabled('shell_exec')) { |
| 169 | return false; |
| 170 | } |
| 171 | |
| 172 | if (self::isMethodDisabled('getmypid')) { |
| 173 | return false; |
| 174 | } |
| 175 | |
| 176 | if (self::isSystemNotSupported()) { |
| 177 | return false; |
| 178 | } |
| 179 | |
| 180 | if (!self::commandExists('ps') || !self::returnsSuccessCode('ps') || !self::commandExists('awk')) { |
| 181 | return false; |
| 182 | } |
| 183 | |
| 184 | if (!in_array(getmypid(), self::getRunningProcesses())) { |
| 185 | return false; |
| 186 | } |
| 187 | |
| 188 | if (!self::isProcFSMounted() && !SettingsServer::isMac()) { |
| 189 | return false; |
| 190 | } |
| 191 | |
| 192 | return true; |
| 193 | } |
| 194 | |
| 195 | private static function isSystemNotSupported() |
| 196 | { |
| 197 | $uname = @shell_exec('uname -a 2> /dev/null'); |
| 198 | |
| 199 | if (empty($uname)) { |
| 200 | $uname = php_uname(); |
| 201 | } |
| 202 | |
| 203 | if (strpos($uname, 'synology') !== false) { |
| 204 | return true; |
| 205 | } |
| 206 | return false; |
| 207 | } |
| 208 | |
| 209 | public static function isMethodDisabled($command) |
| 210 | { |
| 211 | if (!function_exists($command)) { |
| 212 | return true; |
| 213 | } |
| 214 | |
| 215 | $disabled = explode(',', ini_get('disable_functions')); |
| 216 | $disabled = array_map('trim', $disabled); |
| 217 | return in_array($command, $disabled) || !function_exists($command); |
| 218 | } |
| 219 | |
| 220 | private static function returnsSuccessCode($command) |
| 221 | { |
| 222 | $exec = $command . ' > /dev/null 2>&1; echo $?'; |
| 223 | $returnCode = shell_exec($exec); |
| 224 | $returnCode = trim($returnCode); |
| 225 | return 0 == (int) $returnCode; |
| 226 | } |
| 227 | |
| 228 | private static function commandExists($command) |
| 229 | { |
| 230 | $result = @shell_exec('which ' . escapeshellarg($command) . ' 2> /dev/null'); |
| 231 | |
| 232 | return !empty($result); |
| 233 | } |
| 234 | |
| 235 | /** |
| 236 | * ps -e requires /proc |
| 237 | * @return bool |
| 238 | */ |
| 239 | private static function isProcFSMounted() |
| 240 | { |
| 241 | if (is_resource(@fopen('/proc', 'r'))) { |
| 242 | return true; |
| 243 | } |
| 244 | // Testing if /proc is a resource with @fopen fails on systems with open_basedir set. |
| 245 | // by using stat we not only test the existence of /proc but also confirm it's a 'proc' filesystem |
| 246 | $type = @shell_exec('stat -f -c "%T" /proc 2>/dev/null'); |
| 247 | return strpos($type, 'proc') === 0; |
| 248 | } |
| 249 | |
| 250 | public static function getListOfRunningProcesses() |
| 251 | { |
| 252 | $processes = `ps ex 2>/dev/null`; |
| 253 | if (empty($processes)) { |
| 254 | return array(); |
| 255 | } |
| 256 | return explode("\n", $processes); |
| 257 | } |
| 258 | |
| 259 | /** |
| 260 | * @return int[] The ids of the currently running processes |
| 261 | */ |
| 262 | public static function getRunningProcesses() |
| 263 | { |
| 264 | $ids = explode("\n", trim(`ps ex 2>/dev/null | awk '! /defunct/ {print $1}' 2>/dev/null`)); |
| 265 | |
| 266 | $ids = array_map('intval', $ids); |
| 267 | $ids = array_filter($ids, function ($id) { |
| 268 | return $id > 0; |
| 269 | }); |
| 270 | |
| 271 | return $ids; |
| 272 | } |
| 273 | } |
| 274 |