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Command: getgid | Section: 2 | Source: OpenBSD | File: getgid.2
GETGID(2) FreeBSD System Calls Manual GETGID(2)
NAME
getgid, getegid - get group process identification
SYNOPSIS
#include <unistd.h>
gid_t
getgid(void);
gid_t
getegid(void);
DESCRIPTION
The getgid() function returns the real group ID of the calling process
and the getegid() function returns the effective group ID of the calling
process.
The real group ID is specified at login time.
The real group ID is the group of the user who invoked the program. As
the effective group ID gives the process additional permissions during
the execution of "set-group-ID" mode processes, getgid() is used to
determine the real group ID of the calling process.
ERRORS
The getgid() and getegid() functions are always successful, and no return
value is reserved to indicate an error.
SEE ALSO
getgroups(2), getresgid(2), getuid(2), setgid(2), setregid(2)
STANDARDS
The getgid() and getegid() functions conform to IEEE Std 1003.1-2008
("POSIX.1").
HISTORY
The getgid() system call first appeared in Version 4 AT&T UNIX, and
getegid() in Version 7 AT&T UNIX.
FreeBSD 14.1-RELEASE-p8 September 10, 2015 FreeBSD 14.1-RELEASE-p8