(PHP 4, PHP 5, PHP 7) Return the effective group ID of the current process

(PHP 4, PHP 5, PHP 7) Return info about system resource limits

(PHP 4, PHP 5, PHP 7) Determine terminal device name

(PHP 4, PHP 5, PHP 7) Return info about a group by group id

(PHP 4, PHP 5, PHP 7) Make the current process a session leader

(PHP 4, PHP 5, PHP 7) Get the current sid of the process

(PHP 4, PHP 5, PHP 7) Send a signal to a process