term% cat index.txt GETUID(2) System Calls Manual GETUID(2)
NAME
getuid, getgid, geteuid, getegid - get user and group identity
SYNOPSIS
getuid( )
geteuid( )
getgid( )
getegid( )
DESCRIPTION
Getuid returns the real user ID of the current process, geteuid the ef‐
fective user ID. The real user ID identifies the person who is logged
in, in contradistinction to the effective user ID, which determines his
access permission at the moment. It is thus useful to programs which
operate using the `set user ID' mode, to find out who invoked them.
Getgid returns the real group ID, getegid the effective group ID.
SEE ALSO
setuid(2)
ASSEMBLER
(getuid = 24.)
sys getuid
(real user ID in r0, effective user ID in r1)
(getgid = 47.)
sys getgid
(real group ID in r0, effective group ID in r1)
GETUID(2)