17c478bdstevel@tonic-gate/*
27c478bdstevel@tonic-gate * CDDL HEADER START
37c478bdstevel@tonic-gate *
47c478bdstevel@tonic-gate * The contents of this file are subject to the terms of the
57c478bdstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
67c478bdstevel@tonic-gate * (the "License").  You may not use this file except in compliance
77c478bdstevel@tonic-gate * with the License.
87c478bdstevel@tonic-gate *
97c478bdstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
107c478bdstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
117c478bdstevel@tonic-gate * See the License for the specific language governing permissions
127c478bdstevel@tonic-gate * and limitations under the License.
137c478bdstevel@tonic-gate *
147c478bdstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
157c478bdstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
167c478bdstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
177c478bdstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
187c478bdstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
197c478bdstevel@tonic-gate *
207c478bdstevel@tonic-gate * CDDL HEADER END
217c478bdstevel@tonic-gate */
227c478bdstevel@tonic-gate/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
237c478bdstevel@tonic-gate/*	  All Rights Reserved  	*/
247c478bdstevel@tonic-gate
257c478bdstevel@tonic-gate
267c478bdstevel@tonic-gate/*
277c478bdstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
287c478bdstevel@tonic-gate * Use is subject to license terms.
297c478bdstevel@tonic-gate */
307c478bdstevel@tonic-gate
317c478bdstevel@tonic-gate#pragma ident	"%Z%%M%	%I%	%E% SMI"
327c478bdstevel@tonic-gate/*
337c478bdstevel@tonic-gate *	getname(name)  --  get logname
347c478bdstevel@tonic-gate *
357c478bdstevel@tonic-gate *		getname tries to find the user's logname from:
367c478bdstevel@tonic-gate *			${LOGNAME}, if set and if it is telling the truth
377c478bdstevel@tonic-gate *			/etc/passwd, otherwise
387c478bdstevel@tonic-gate *
397c478bdstevel@tonic-gate *		The logname is returned as the value of the function.
407c478bdstevel@tonic-gate *
417c478bdstevel@tonic-gate *		Getname returns the user's user id converted to ASCII
427c478bdstevel@tonic-gate *		for unknown lognames.
437c478bdstevel@tonic-gate *
447c478bdstevel@tonic-gate */
457c478bdstevel@tonic-gate
467c478bdstevel@tonic-gate#include "string.h"
477c478bdstevel@tonic-gate#include "pwd.h"
487c478bdstevel@tonic-gate#include "errno.h"
497c478bdstevel@tonic-gate#include "sys/types.h"
507c478bdstevel@tonic-gate#include "stdlib.h"
517c478bdstevel@tonic-gate#include "unistd.h"
527c478bdstevel@tonic-gate
537c478bdstevel@tonic-gate#include "lp.h"
547c478bdstevel@tonic-gate
557c478bdstevel@tonic-gatechar *
567c478bdstevel@tonic-gate#if	defined(__STDC__)
577c478bdstevel@tonic-gategetname (
587c478bdstevel@tonic-gate	void
597c478bdstevel@tonic-gate)
607c478bdstevel@tonic-gate#else
617c478bdstevel@tonic-gategetname ()
627c478bdstevel@tonic-gate#endif
637c478bdstevel@tonic-gate{
647c478bdstevel@tonic-gate	uid_t			uid;
657c478bdstevel@tonic-gate	struct passwd		*p;
667c478bdstevel@tonic-gate	static char		*logname	= 0;
677c478bdstevel@tonic-gate	char			*l;
687c478bdstevel@tonic-gate
697c478bdstevel@tonic-gate	if (logname)
707c478bdstevel@tonic-gate		return (logname);
717c478bdstevel@tonic-gate
727c478bdstevel@tonic-gate	uid = getuid();
737c478bdstevel@tonic-gate
747c478bdstevel@tonic-gate	setpwent ();
757c478bdstevel@tonic-gate	if (
767c478bdstevel@tonic-gate		!(l = getenv("LOGNAME"))
777c478bdstevel@tonic-gate	     || !(p = getpwnam(l))
787c478bdstevel@tonic-gate	     || p->pw_uid != uid
797c478bdstevel@tonic-gate	)
807c478bdstevel@tonic-gate		if ((p = getpwuid(uid)))
817c478bdstevel@tonic-gate			l = p->pw_name;
827c478bdstevel@tonic-gate		else
837c478bdstevel@tonic-gate			l = 0;
847c478bdstevel@tonic-gate	endpwent ();
857c478bdstevel@tonic-gate
867c478bdstevel@tonic-gate	if (l)
877c478bdstevel@tonic-gate		logname = Strdup(l);
887c478bdstevel@tonic-gate	else {
897c478bdstevel@tonic-gate		if (uid > 0) {
907c478bdstevel@tonic-gate			logname = Malloc(10 + 1);
917c478bdstevel@tonic-gate			if (logname)
927c478bdstevel@tonic-gate				sprintf (logname, "%d", uid);
937c478bdstevel@tonic-gate		}
947c478bdstevel@tonic-gate	}
957c478bdstevel@tonic-gate
967c478bdstevel@tonic-gate	if (!logname)
977c478bdstevel@tonic-gate	{
987c478bdstevel@tonic-gate		errno = ENOMEM;
997c478bdstevel@tonic-gate	}
1007c478bdstevel@tonic-gate	else
1017c478bdstevel@tonic-gate	{
1027c478bdstevel@tonic-gate		errno = 0;
1037c478bdstevel@tonic-gate	}
1047c478bdstevel@tonic-gate
1057c478bdstevel@tonic-gate	return (logname);
1067c478bdstevel@tonic-gate}
107