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.

STANDARDS

       POSIX.1-2001, POSIX.1-2008, 4.3BSD.

NOTES

       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.

       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.

SEE ALSO

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