NAME

       getgid, getegid - get group identity

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <unistd.h>

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

DESCRIPTION

       getgid() returns the real group ID of the calling process.

       getegid() returns the effective group ID of the calling process.

ERRORS

       These functions are always successful and never modify errno.

VERSIONS

       On  Alpha,  instead  of  a pair of getgid() and getegid() system calls, a single getxgid()
       system call is provided, which returns a pair of  real  and  effective  GIDs.   The  glibc
       getgid() and getegid() wrapper functions transparently deal with this.  See syscall(2) for
       details regarding register mapping.

STANDARDS

       POSIX.1-2008.

HISTORY

       POSIX.1-2001, 4.3BSD.

       The original Linux getgid() and getegid() system calls supported only  16-bit  group  IDs.
       Subsequently,  Linux  2.4  added  getgid32()  and getegid32(), supporting 32-bit IDs.  The
       glibc getgid() and getegid() wrapper functions  transparently  deal  with  the  variations
       across kernel versions.

SEE ALSO

       getresgid(2), setgid(2), setregid(2), credentials(7)