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<?php
namespace Bitrix\Scale;
/**
* Class ShellAdapter
* Executes shell commands
* @package Bitrix\Scale
*/
class ShellAdapter
{
const SUCCESS_RESULT = 0;
protected $resOutput = "";
protected $resError = "";
/**
* Checks and escapes command
* @param string $command
* @return string escapedSring
* @throws \Bitrix\Main\ArgumentNullException
*/
protected function prepareExecution($command)
{
if($command == '')
throw new \Bitrix\Main\ArgumentNullException("command");
$this->resOutput = "";
$this->resError = "";
return escapeshellcmd($command);
}
/**
* Starts execution fo shell command
* Results can be obtained by another special commands
* @param $command
* @return true;
*/
public function asyncExec($command)
{
$outputPath = "/dev/null";
$command = $this->prepareExecution($command);
exec($command. " > ".$outputPath." 2>&1 &");
return true;
}
/**
* @return string Last command output
*/
public function getLastOutput()
{
return $this->resOutput;
}
/**
* @return string last error output
*/
public function getLastError()
{
return $this->resError;
}
/**
* Executes shell command & return shell command execution result
* @param string $command
* @return bool
*/
public function syncExec($command)
{
$command = $this->prepareExecution($command);
$retVal = 1;
$descriptorspec = array(
0 => array("pipe", "r"), // stdin
1 => array("pipe", "w"), // stdout
2 => array("pipe", "w") // stderr
);
$pipes = array();
$process = proc_open('/bin/bash', $descriptorspec, $pipes);
if (is_resource($process))
{
fwrite($pipes[0], $command);
fclose($pipes[0]);
$this->resOutput = stream_get_contents($pipes[1]);
fclose($pipes[1]);
$this->resError = stream_get_contents($pipes[2]);
fclose($pipes[2]);
$retVal = proc_close($process);
}
return $retVal == static::SUCCESS_RESULT;
}
}