/**
* @static
* @return string "windows" or "unix"
*/
public static function getSystemEnvironment()
{
if (self::$systemEnvironment == null) {
if (stripos(php_uname("s"), "windows") !== false) {
self::$systemEnvironment = 'windows';
} else {
self::$systemEnvironment = 'unix';
}
}
return self::$systemEnvironment;
}
/**
* @param $cmd
* @param null $outputFile
* @param null $timeout
* @return string
*/
public static function exec($cmd, $outputFile = null, $timeout = null)
{
if ($timeout && self::getTimeoutBinary()) {
// check if --kill-after flag is supported in timeout
if (self::$timeoutKillAfterSupport === null) {
$out = self::exec(self::getTimeoutBinary() . " --help");
if (strpos($out, "--kill-after")) {
self::$timeoutKillAfterSupport = true;
} else {
self::$timeoutKillAfterSupport = false;
}
}
$killAfter = "";
if (self::$timeoutKillAfterSupport) {
$killAfter = " -k 1m";
}
$cmd = self::getTimeoutBinary() . $killAfter . " " . $timeout . "s " . $cmd;
} elseif ($timeout) {
\Logger::warn("timeout binary not found, executing command without timeout");
}
if ($outputFile) {
$cmd = $cmd . " > " . $outputFile . " 2>&1";
} else {
// send stderr to /dev/null otherwise this goes to the apache error log and can fill it up pretty quickly
if (self::getSystemEnvironment() != 'windows') {
$cmd .= " 2> /dev/null";
}
}
\Logger::debug("Executing command `" . $cmd . "` on the current shell");
$return = shell_exec($cmd);
return $return;
}