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<?php |
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namespace LibSSH2\Sessions; |
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use LibSSH2\Authentication\Authentication; |
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use LibSSH2\Configuration; |
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use LibSSH2\Connection; |
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/** |
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* Shell class. |
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* |
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* Shell interface. |
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* |
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* @package LibSSH2\Sessions |
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*/ |
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class Shell extends Connection |
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{ |
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/** |
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* SSH interactive shell resource. |
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* |
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* @var resource |
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*/ |
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private $stream; |
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private $command; |
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/** |
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* Constructor. |
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* |
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* @param object $configuration Configuration class object |
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* @param object $authentication Authentication class object |
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* @return void |
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*/ |
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public function __construct(Configuration $configuration, Authentication $authentication) |
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{ |
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parent::__construct($configuration, $authentication); |
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$this->shell(); |
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} |
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/** |
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* Destructor. |
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* |
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* @return void |
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*/ |
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public function __destruct() |
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{ |
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fclose($this->stream); |
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} |
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/** |
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* Returns SSH interactive shell. |
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* |
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* @return resouce SSH interactive shell |
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*/ |
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final public function shell() |
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{ |
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if (($this->stream = @ssh2_shell($this->connection)) === false) |
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{ |
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throw new \RuntimeException($this->get_error_message()); |
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} |
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sleep(1); |
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return $this; |
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} |
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/** |
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* Retrieves shell command output. |
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* |
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* @return void |
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*/ |
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final public function output() |
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{ |
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$stdout = []; |
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while (!preg_match('/RETURN_CODE:\[([0-9]+)\]/', implode(PHP_EOL, $stdout), $retval)) |
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{ |
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$buffer = fgets($this->stream); |
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if (!empty($buffer)) |
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{ |
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$stdout[] = trim($buffer); |
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//print $buffer; |
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} |
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} |
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$stdout = preg_replace('/RETURN_CODE:\[([0-9]+)\]/', '', $stdout); |
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$this->set_output(implode(PHP_EOL, $stdout)); |
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$this->set_exitstatus($retval[1]); |
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} |
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/** |
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* Execute remote command via SSH (shell). |
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* |
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* @param string $command command being executed |
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* @param instance $terminal Terminal instance |
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* @return object |
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*/ |
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final public function write($command, $returncode = FALSE) |
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{ |
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$command = ($returncode == FALSE) ? $command : $command.'; echo "RETURN_CODE:[$?]";'; |
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$write_count = 0; |
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$string_len = strlen($command.PHP_EOL); |
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while ($write_count < $string_len) |
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{ |
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$fwrite_count = fwrite($this->stream, substr($command.PHP_EOL, $write_count), 1024); |
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if ($fwrite_count === FALSE) |
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{ |
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throw new \RuntimeException('failed to write command to stream'); |
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} |
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$write_count += $fwrite_count; |
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} |
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sleep(1); |
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return $this; |
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} |
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} |
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