Will return a three character OS identifier e.g. WIN or LIN
| public static getOsIdentifier ( ) : string | ||
| return | string | |
/**
* Helper method which allows to execute a callable as the super user the server got started by.
*
* @param callable $callable The callable to run
* @param array $arguments Arguments to pass to the callable
*
* @return mixed The callables result
*/
public static function sudo(callable $callable, array $arguments = array())
{
// don't do anything under Windows
if (FileSystem::getOsIdentifier() === FileSystem::OS_IDENTIFIER_WIN) {
return call_user_func_array($callable, $arguments);
}
// get the current user user pair (super user and effective user)
$currentUserId = (int) posix_geteuid();
$superUserId = (int) posix_getuid();
// temporarily switch to the super user
posix_seteuid($superUserId);
// execute the callable
$result = call_user_func_array($callable, $arguments);
// switch back to the effective user
posix_seteuid($currentUserId);
return $result;
}
/**
* Handle an event.
*
* @param \League\Event\EventInterface $event The triggering event
*
* @return void
* @see \League\Event\ListenerInterface::handle()
*/
public function handle(EventInterface $event)
{
try {
// load the application server instance
/** @var \AppserverIo\Appserver\Core\Interfaces\ApplicationServerInterface $applicationServer */
$applicationServer = $this->getApplicationServer();
// write a log message that the event has been invoked
$applicationServer->getSystemLogger()->info($event->getName());
// don't do anything under Windows
if (FileSystem::getOsIdentifier() === 'WIN') {
$applicationServer->getSystemLogger()->info('Don\'t switch UID to \'%s\' because OS is Windows');
return;
}
// initialize the variable for user/group
$uid = 0;
$gid = 0;
// throw an exception if the POSIX extension is not available
if (extension_loaded('posix') === false) {
throw new \Exception('Can\'t switch user, because POSIX extension is not available');
}
// print a message with the old UID/EUID
$applicationServer->getSystemLogger()->info("Running as " . posix_getuid() . "/" . posix_geteuid());
// extract the user and group name as variables
extract(posix_getgrnam($applicationServer->getSystemConfiguration()->getGroup()));
extract(posix_getpwnam($applicationServer->getSystemConfiguration()->getUser()));
// switch the effective GID to the passed group
if (posix_setegid($gid) === false) {
$applicationServer->getSystemLogger()->error(sprintf('Can\'t switch GID to \'%s\'', $gid));
}
// print a message with the new GID/EGID
$applicationServer->getSystemLogger()->info("Running as group" . posix_getgid() . "/" . posix_getegid());
// switch the effective UID to the passed user
if (posix_seteuid($uid) === false) {
$applicationServer->getSystemLogger()->error(sprintf('Can\'t switch UID to \'%s\'', $uid));
}
// print a message with the new UID/EUID
$applicationServer->getSystemLogger()->info("Running as user " . posix_getuid() . "/" . posix_geteuid());
} catch (\Exception $e) {
$applicationServer->getSystemLogger()->error($e->__toString());
}
}
/**
* Will return a three character OS identifier e.g. WIN or LIN
*
* @return string
*/
public function getOsIdentifier()
{
return FileSystem::getOsIdentifier();
}
