GETGID(2)                        System Calls                        GETGID(2)

NAME

       getgid, getegid - get group process identification

SYNOPSIS

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

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

DESCRIPTION

       The  getgid  function returns the real group ID of the calling process,
       getegid returns the effective group ID of the calling process.

       The real group ID is specified at login time.

       The real group ID is the group of the user who invoked the program.  As
       the  effective group ID gives the process additional permissions during
       the execution of set-group-ID mode processes, getgid is used to  deter‐
       mine the real-user-id of the calling process.

ERRORS

       The  getgid  and getegid functions are always successful, and no return
       value is reserved to indicate an error.

SEE ALSO

       getuid(2), setregid(2), setgid(2)

STANDARDS

       Getgid and getegid conform to IEEE Std 1003.1-1988 (POSIX).



GNO                             16 January 1997                      GETGID(2)