redhat man page for getgid

GETGID(2)						     Linux Programmer's Manual							 GETGID(2)

NAME
       getgid, getegid - get group identity

SYNOPSIS
       #include <unistd.h>
       #include <sys/types.h>

       gid_t getgid(void);
       gid_t getegid(void);

DESCRIPTION
       getgid returns the real group ID of the current process.

       getegid returns the effective group ID of the current process.

       The real ID corresponds to the ID of the calling process.  The effective ID corresponds to the set ID bit on the file being executed.

ERRORS
       These functions are always successful.

CONFORMING TO
       POSIX, BSD 4.3

SEE ALSO
       setregid(2), setgid(2)

Linux 0.99.11							    1993-07-23								 GETGID(2)