NAME | SYNOPSIS | DESCRIPTION | ERRORS | CONFORMING TO | NOTES | SEE ALSO | COLOPHON

The Linux Programming Interface

GETGID(2)                     Linux Programmer's Manual                     GETGID(2)

NAME         top

       getgid, getegid - get group identity

SYNOPSIS         top

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

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

DESCRIPTION         top

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

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

ERRORS         top

       These functions are always successful.

CONFORMING TO         top

       POSIX.1-2001, 4.3BSD.

NOTES         top

       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         top

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

COLOPHON         top

       This page is part of release 3.32 of the Linux man-pages project.  A
       description of the project, and information about reporting bugs, can be found
       at http://www.kernel.org/doc/man-pages/.

Linux                                 2010-11-22                            GETGID(2)

HTML rendering created 2010-12-03 by Michael Kerrisk, author of The Linux Programming Interface