10Sstevel@tonic-gate /*
20Sstevel@tonic-gate * CDDL HEADER START
30Sstevel@tonic-gate *
40Sstevel@tonic-gate * The contents of this file are subject to the terms of the
56737Sraf * Common Development and Distribution License (the "License").
66737Sraf * You may not use this file except in compliance with the License.
70Sstevel@tonic-gate *
80Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
90Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
100Sstevel@tonic-gate * See the License for the specific language governing permissions
110Sstevel@tonic-gate * and limitations under the License.
120Sstevel@tonic-gate *
130Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
140Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
150Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
160Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
170Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
180Sstevel@tonic-gate *
190Sstevel@tonic-gate * CDDL HEADER END
200Sstevel@tonic-gate */
216737Sraf
220Sstevel@tonic-gate /*
236737Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
240Sstevel@tonic-gate * Use is subject to license terms.
250Sstevel@tonic-gate */
260Sstevel@tonic-gate
270Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */
280Sstevel@tonic-gate /* All Rights Reserved */
290Sstevel@tonic-gate
30*6812Sraf #pragma ident "%Z%%M% %I% %E% SMI"
310Sstevel@tonic-gate
32*6812Sraf #pragma weak _cuserid = cuserid
33*6812Sraf
34*6812Sraf #include "lint.h"
350Sstevel@tonic-gate #include <stdio.h>
360Sstevel@tonic-gate #include <pwd.h>
370Sstevel@tonic-gate #include <string.h>
380Sstevel@tonic-gate #include <stdlib.h>
390Sstevel@tonic-gate #include <unistd.h>
406737Sraf #include <pthread.h>
410Sstevel@tonic-gate
420Sstevel@tonic-gate static char res[L_cuserid];
430Sstevel@tonic-gate
440Sstevel@tonic-gate char *
cuserid(char * s)450Sstevel@tonic-gate cuserid(char *s)
460Sstevel@tonic-gate {
470Sstevel@tonic-gate struct passwd *pw;
480Sstevel@tonic-gate struct passwd pwd;
490Sstevel@tonic-gate char buffer[BUFSIZ];
500Sstevel@tonic-gate char utname[L_cuserid];
510Sstevel@tonic-gate char *p;
526737Sraf int cancel_state;
536737Sraf
546737Sraf /*
556737Sraf * The UNIX98 Posix conformance test suite requires
566737Sraf * cuserid() to not be a cancellation point.
576737Sraf */
586737Sraf (void) pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cancel_state);
590Sstevel@tonic-gate
600Sstevel@tonic-gate if (s == NULL)
610Sstevel@tonic-gate s = res;
626737Sraf if ((p = getlogin_r(utname, L_cuserid)) != NULL) {
636737Sraf (void) strlcpy(s, p, L_cuserid);
646737Sraf } else if ((pw = getpwuid_r(getuid(), &pwd, buffer, BUFSIZ)) != NULL) {
656737Sraf (void) strlcpy(s, pw->pw_name, L_cuserid);
666737Sraf } else {
676737Sraf *s = '\0';
686737Sraf s = NULL;
696737Sraf }
706737Sraf
716737Sraf (void) pthread_setcancelstate(cancel_state, NULL);
726737Sraf return (s);
730Sstevel@tonic-gate }
74