1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
23/*	  All Rights Reserved  	*/
24
25
26#ident	"%Z%%M%	%I%	%E% SMI"       /* SVr4.0 1.2 */
27
28#include	<sys/types.h>
29#include	<stdio.h>
30#include	<pwd.h>
31#include	<userdefs.h>
32#include	<users.h>
33
34#include	<sys/param.h>
35
36#ifndef MAXUID
37#include	<limits.h>
38#define	MAXUID	UID_MAX
39#endif
40
41struct passwd *getpwuid();
42
43int
44valid_uid( uid, pptr )
45uid_t uid;
46struct passwd **pptr;
47{
48	register struct passwd *t_pptr;
49
50	if( uid <= 0 ) return( INVALID );
51	if( uid <= DEFRID ) {
52		if( pptr ) *pptr = getpwuid( uid );
53
54		return( RESERVED );
55	}
56
57	if( uid > MAXUID ) return( TOOBIG );
58
59	if( t_pptr = getpwuid( uid ) ) {
60		if( pptr ) *pptr = t_pptr;
61		return( NOTUNIQUE );
62	}
63
64	return( UNIQUE );
65}
66