getgid(2) - Linux man page

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, 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.

Referenced By

awk(1), ksh(1), mksh(1), ps(1), setgroups(2), setreuid(2)