getgid - get real group ID of process

Syntax	#include <unistd.h> Optional #include <sys/types.h> (End) gid_t getgid(void);
Description	getgid() returns the real group ID of the calling process.
Return val.	Real group ID of the calling process. The function is always successful.
See also	getegid(), getuid(), setgid(), sys/types.h, unistd.h, td.h, manual "POSIX Basics" [1 (Related publications)].