— Built-in Function: pgid = getpgrp ()

Return the process group id of the current process.

— Built-in Function: pid = getpid ()

Return the process id of the current process.

— Built-in Function: pid = getppid ()

Return the process id of the parent process.

— Built-in Function: euid = geteuid ()

Return the effective user id of the current process.

— Built-in Function: uid = getuid ()

Return the real user id of the current process.

— Built-in Function: egid = getegid ()

Return the effective group id of the current process.

— Built-in Function: gid = getgid ()

Return the real group id of the current process.