freebsd-dev/lib/libcompat/4.4/cuserid.3

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.\"
.\" Copyright (c) 1995 Joerg Wunsch
.\"
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.\" This product includes software developed by Joerg Wunsch
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.\" $Id$
.\"
.Dd April 10, 1995
.Os
.Dt CUSERID 3
.Sh NAME
.Nm cuserid
.Nd get user name associated with effective UID
.Sh SYNOPSIS
.Fd #include <stdio.h>
.Ft char *
.Fn cuserid "char *s"
.Sh DESCRIPTION
.Bf -symbolic
The cuserid function is made obsolete by getpwuid.
.br
It is available from the compatibility library, libcompat.
.Ef
.Pp
The function
.Nm cuserid
gets the user name associated with the effective UID of the current
process. If the argument
.Fa s
is non-zero, the name is copied to the buffer it is pointing to,
and that address is being returned. This buffer must provide space
for at least
.Em L_cuserid
characters, this constant is defined in
.Pa Aq stdio.h .
If
.Fa s
is zero, an internal array is used an its address will be returned.
.Sh RETURN VALUES
.Nm cuserid
returns the address of an array where the name has been stored to.
If the name associated with the effective UID of the current process
could not be found, either a null pointer will be returned, or
.Po
if
.Fa s
is non-zero
.Pc
the buffer
.Fa s
will be filled with a null string.
.Sh SEE ALSO
.Xr getpwuid 3 ,
.Xr geteuid 3 .