(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

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

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

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

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

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