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.\" Copyright (c) 1995 Joerg Wunsch
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.\" $FreeBSD: release/9.1.0/lib/libcompat/4.4/cuserid.3 206622 2010-04-14 19:08:06Z uqs $
.\"
.Dd April 10, 1995
.Dt CUSERID 3
.Os
.Sh NAME
.Nm cuserid
.Nd get user name associated with effective UID
.Sh LIBRARY
.Lb libcompat
.Sh SYNOPSIS
.In stdio.h
.Ft char *
.Fn cuserid "char *s"
.Sh DESCRIPTION
.Bf -symbolic
The
.Fn cuserid
function is made obsolete by
.Xr getpwuid 3 .
.Ef
.Pp
The function
.Fn cuserid
gets the user name associated with the effective UID of the current
process.
If the argument
.Fa s
is non-NULL, the name is copied to the buffer it points to,
and that address is being returned.
This buffer must provide space
for at least
.Em L_cuserid
characters.
The L_cuserid constant is defined in
.In stdio.h .
.Pp
If
.Fa s
is NULL, an internal array is used and its address will be returned.
.Sh RETURN VALUES
The
.Fn cuserid
function returns the address of an array in which the name has been stored.
.Pp
If the name associated with the effective UID of the current process
could not be found, either a null pointer will be returned, or
(if
.Fa s
is non-NULL)
the buffer
.Fa s
will be filled with a null string.
.Sh SEE ALSO
.Xr geteuid 2 ,
.Xr getpwuid 3