/**
* Checks if the specified tool binary exists and returns the full path.
*
* @param string $file Binary file to check.
*
* @throws Net_SSH2_Exception If the specified SSH2 binary tool was not found.
* @return void
*/
private function _getBinaryPath($file)
{
//Check for ssh binary
if (array_key_exists('ssh2_binary_path', $this->options)) {
$ssh2_binary = escapeshellarg(File::buildpath(array($options['ssh2_binary_path'], $file)));
} else {
$ssh2_binary = System::which($file);
}
if (!is_file($ssh2_binary)) {
throw new Net_SSH2_Exception(Net_SSH2::getMessage(SSH2_BINARY_NOT_FOUND, $file));
}
return $ssh2_binary;
}
