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
5*6812Sraf * Common Development and Distribution License (the "License").
6*6812Sraf * 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 */
21*6812Sraf
220Sstevel@tonic-gate /*
23*6812Sraf * 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 _getlogin = getlogin
33*6812Sraf #pragma weak _getlogin_r = getlogin_r
340Sstevel@tonic-gate
35*6812Sraf #include "lint.h"
360Sstevel@tonic-gate #include <sys/types.h>
370Sstevel@tonic-gate #include <sys/stat.h>
380Sstevel@tonic-gate #include <fcntl.h>
390Sstevel@tonic-gate #include <string.h>
400Sstevel@tonic-gate #include <stdlib.h>
410Sstevel@tonic-gate #include <limits.h>
420Sstevel@tonic-gate #include "utmpx.h"
430Sstevel@tonic-gate #include <unistd.h>
440Sstevel@tonic-gate #include <errno.h>
450Sstevel@tonic-gate #include <thread.h>
460Sstevel@tonic-gate #include <synch.h>
470Sstevel@tonic-gate #include <mtlib.h>
480Sstevel@tonic-gate #include "tsd.h"
490Sstevel@tonic-gate
500Sstevel@tonic-gate /*
510Sstevel@tonic-gate * XXX - _POSIX_LOGIN_NAME_MAX limits the length of a login name. The utmpx
520Sstevel@tonic-gate * interface provides for a 32 character login name, but for the sake of
530Sstevel@tonic-gate * compatibility, we are still using the old utmp-imposed limit.
540Sstevel@tonic-gate */
550Sstevel@tonic-gate
560Sstevel@tonic-gate /*
570Sstevel@tonic-gate * POSIX.1c Draft-6 version of the function getlogin_r.
580Sstevel@tonic-gate * It was implemented by Solaris 2.3.
590Sstevel@tonic-gate */
600Sstevel@tonic-gate char *
getlogin_r(char * answer,int namelen)61*6812Sraf getlogin_r(char *answer, int namelen)
620Sstevel@tonic-gate {
630Sstevel@tonic-gate int uf;
640Sstevel@tonic-gate off64_t me;
650Sstevel@tonic-gate struct futmpx ubuf;
660Sstevel@tonic-gate
670Sstevel@tonic-gate if (namelen < _POSIX_LOGIN_NAME_MAX) {
680Sstevel@tonic-gate errno = ERANGE;
690Sstevel@tonic-gate return (NULL);
700Sstevel@tonic-gate }
710Sstevel@tonic-gate
720Sstevel@tonic-gate if ((me = (off64_t)ttyslot()) < 0)
730Sstevel@tonic-gate return (NULL);
740Sstevel@tonic-gate if ((uf = open64(UTMPX_FILE, 0)) < 0)
750Sstevel@tonic-gate return (NULL);
760Sstevel@tonic-gate (void) lseek64(uf, me * sizeof (ubuf), SEEK_SET);
770Sstevel@tonic-gate if (read(uf, &ubuf, sizeof (ubuf)) != sizeof (ubuf)) {
780Sstevel@tonic-gate (void) close(uf);
790Sstevel@tonic-gate return (NULL);
800Sstevel@tonic-gate }
810Sstevel@tonic-gate (void) close(uf);
820Sstevel@tonic-gate if (ubuf.ut_user[0] == '\0')
830Sstevel@tonic-gate return (NULL);
840Sstevel@tonic-gate (void) strncpy(&answer[0], &ubuf.ut_user[0],
850Sstevel@tonic-gate _POSIX_LOGIN_NAME_MAX - 1);
860Sstevel@tonic-gate answer[_POSIX_LOGIN_NAME_MAX - 1] = '\0';
870Sstevel@tonic-gate return (&answer[0]);
880Sstevel@tonic-gate }
890Sstevel@tonic-gate
900Sstevel@tonic-gate /*
910Sstevel@tonic-gate * POSIX.1c standard version of the function getlogin_r.
920Sstevel@tonic-gate * User gets it via static getlogin_r from the header file.
930Sstevel@tonic-gate */
940Sstevel@tonic-gate int
__posix_getlogin_r(char * name,int namelen)950Sstevel@tonic-gate __posix_getlogin_r(char *name, int namelen)
960Sstevel@tonic-gate {
970Sstevel@tonic-gate int nerrno = 0;
980Sstevel@tonic-gate int oerrno = errno;
990Sstevel@tonic-gate
1000Sstevel@tonic-gate errno = 0;
101*6812Sraf if (getlogin_r(name, namelen) == NULL) {
1020Sstevel@tonic-gate if (errno == 0)
1030Sstevel@tonic-gate nerrno = EINVAL;
1040Sstevel@tonic-gate else
1050Sstevel@tonic-gate nerrno = errno;
1060Sstevel@tonic-gate }
1070Sstevel@tonic-gate errno = oerrno;
1080Sstevel@tonic-gate return (nerrno);
1090Sstevel@tonic-gate }
1100Sstevel@tonic-gate
1110Sstevel@tonic-gate char *
getlogin(void)1120Sstevel@tonic-gate getlogin(void)
1130Sstevel@tonic-gate {
1140Sstevel@tonic-gate char *answer = tsdalloc(_T_LOGIN, _POSIX_LOGIN_NAME_MAX, NULL);
1150Sstevel@tonic-gate
1160Sstevel@tonic-gate if (answer == NULL)
1170Sstevel@tonic-gate return (NULL);
118*6812Sraf return (getlogin_r(answer, _POSIX_LOGIN_NAME_MAX));
1190Sstevel@tonic-gate }
120