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NAME | SYNOPSIS | DESCRIPTION | ERRORS | CONFORMING TO | NOTES | SEE ALSO | COLOPHON |
GETGID(2) Linux Programmer's Manual GETGID(2)
getgid, getegid - get group identity
#include <unistd.h>
#include <sys/types.h>
gid_t getgid(void);
gid_t getegid(void);
getgid() returns the real group ID of the calling process.
getegid() returns the effective group ID of the calling process.
These functions are always successful.
POSIX.1-2001, POSIX.1-2008, 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.
getresgid(2), setgid(2), setregid(2), credentials(7)
This page is part of release 4.12 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
Linux 2015-08-08 GETGID(2)
Pages that refer to this page: gawk(1), groups(1@@shadow-utils), ps(1), getgroups(2), setgid(2), setreuid(2), syscalls(2), group_member(3), credentials(7), signal-safety(7), user_namespaces(7)