|GETUID(2)||System Calls Manual||GETUID(2)|
— get user identification
The real user ID is that of the user who has invoked the program.
As the effective user ID gives the process additional permissions during
is used to determine the real user ID of the calling process.
geteuid() functions are always successful, and no
return value is reserved to indicate an error.
geteuid() functions conform to IEEE
Std 1003.1-1988 (“POSIX.1”).
getuid() system call first appeared in
Version 1 AT&T UNIX, and
geteuid() in Version 7
|November 17, 2011||OpenBSD-5.1|