|GETGID(2)||System Calls Manual||GETGID(2)|
— get group process identification
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
is used to determine the real group ID of the calling process.
getegid() functions are always successful, and no
return value is reserved to indicate an error.
getegid() functions conform to IEEE
Std 1003.1-2008 (“POSIX.1”).
getgid() system call first appeared in
Version 4 AT&T UNIX, and
getegid() in Version 7
|July 17, 2013||OpenBSD-5.5|