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/*
27 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
28 * Use is subject to license terms.
29 */
30
31#pragma ident	"%Z%%M%	%I%	%E% SMI"
32/*
33 *	getname(name)  --  get logname
34 *
35 *		getname tries to find the user's logname from:
36 *			${LOGNAME}, if set and if it is telling the truth
37 *			/etc/passwd, otherwise
38 *
39 *		The logname is returned as the value of the function.
40 *
41 *		Getname returns the user's user id converted to ASCII
42 *		for unknown lognames.
43 *
44 */
45
46#include "string.h"
47#include "pwd.h"
48#include "errno.h"
49#include "sys/types.h"
50#include "stdlib.h"
51#include "unistd.h"
52
53#include "lp.h"
54
55char *
56#if	defined(__STDC__)
57getname (
58	void
59)
60#else
61getname ()
62#endif
63{
64	uid_t			uid;
65	struct passwd		*p;
66	static char		*logname	= 0;
67	char			*l;
68
69	if (logname)
70		return (logname);
71
72	uid = getuid();
73
74	setpwent ();
75	if (
76		!(l = getenv("LOGNAME"))
77	     || !(p = getpwnam(l))
78	     || p->pw_uid != uid
79	)
80		if ((p = getpwuid(uid)))
81			l = p->pw_name;
82		else
83			l = 0;
84	endpwent ();
85
86	if (l)
87		logname = Strdup(l);
88	else {
89		if (uid > 0) {
90			logname = Malloc(10 + 1);
91			if (logname)
92				sprintf (logname, "%d", uid);
93		}
94	}
95
96	if (!logname)
97	{
98		errno = ENOMEM;
99	}
100	else
101	{
102		errno = 0;
103	}
104
105	return (logname);
106}
107