getuid - get real user ID

Syntax	#include <unistd.h> Optional #include <sys/types.h> (End) uid_t getuid(void);
Description	getuid() returns the real user ID of the calling process.
Return val.	Real user ID of the calling process. The function is always successful.
See also	getegid(), geteuid(), getgid(), setuid(), sys/types.h, unistd.h.