NAME

       getgid, getegid - get group identity

SYNOPSIS

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

CONFORMING TO

       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)

COLOPHON

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       https://www.kernel.org/doc/man-pages/.