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<?php
namespace Webmozart\Console\Process;
use RuntimeException;
class ProcessLauncher
{
private $running = false;
private $checkInterval = 0.1;
public function isSupported()
{
return function_exists('proc_open');
}
public function isRunning()
{
return $this->running;
}
public function setCheckInterval($checkInterval)
{
$this->checkInterval = $checkInterval;
}
public function launchProcess($command, array $arguments = array(), $killable = true)
{
$this->installSignalHandlers($killable);
$exitCode = $this->run($command, $arguments);
$this->restoreSignalHandlers($killable);
return $exitCode;
}
private function installSignalHandlers($terminable = true)
{
if (function_exists('pcntl_signal') && !$terminable) {
pcntl_signal(SIGTERM, SIG_IGN);
pcntl_signal(SIGINT, SIG_IGN);
}
}
private function restoreSignalHandlers($terminable = true)
{
if (function_exists('pcntl_signal') && !$terminable) {
pcntl_signal(SIGTERM, SIG_DFL);
pcntl_signal(SIGINT, SIG_DFL);
}
}
private function run($command, array $arguments)
{
if (!function_exists('proc_open')) {
throw new RuntimeException('The "proc_open" function is not available.');
}
$replacements = array();
foreach ($arguments as $name => $value) {
$replacements['%'.$name.'%'] = escapeshellarg($value);
}
$command = strtr($command, $replacements);
$dspec = array(
0 => STDIN,
1 => STDOUT,
2 => STDERR,
);
$this->running = true;
$proc = proc_open($command, $dspec, $pipes, null, null);
if (is_resource($proc)) {
while (true) {
$status = proc_get_status($proc);
if (!$status['running']) {
break;
}
sleep($this->checkInterval);
}
proc_close($proc);
}
$this->running = false;
return isset($status['exitcode']) ? $status['exitcode'] : 1;
}
}