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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#pragma weak getlogin = _getlogin
#pragma weak getlogin_r = _getlogin_r
#include "synonyms.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <limits.h>
#include "utmpx.h"
#include <unistd.h>
#include <errno.h>
#include <thread.h>
#include <synch.h>
#include <mtlib.h>
#include "tsd.h"
/*
* XXX - _POSIX_LOGIN_NAME_MAX limits the length of a login name. The utmpx
* interface provides for a 32 character login name, but for the sake of
* compatibility, we are still using the old utmp-imposed limit.
*/
/*
* POSIX.1c Draft-6 version of the function getlogin_r.
* It was implemented by Solaris 2.3.
*/
char *
_getlogin_r(char *answer, int namelen)
{
int uf;
off64_t me;
struct futmpx ubuf;
if (namelen < _POSIX_LOGIN_NAME_MAX) {
errno = ERANGE;
return (NULL);
}
if ((me = (off64_t)ttyslot()) < 0)
return (NULL);
if ((uf = open64(UTMPX_FILE, 0)) < 0)
return (NULL);
(void) lseek64(uf, me * sizeof (ubuf), SEEK_SET);
if (read(uf, &ubuf, sizeof (ubuf)) != sizeof (ubuf)) {
(void) close(uf);
return (NULL);
}
(void) close(uf);
if (ubuf.ut_user[0] == '\0')
return (NULL);
(void) strncpy(&answer[0], &ubuf.ut_user[0],
_POSIX_LOGIN_NAME_MAX - 1);
answer[_POSIX_LOGIN_NAME_MAX - 1] = '\0';
return (&answer[0]);
}
/*
* POSIX.1c standard version of the function getlogin_r.
* User gets it via static getlogin_r from the header file.
*/
int
__posix_getlogin_r(char *name, int namelen)
{
int nerrno = 0;
int oerrno = errno;
errno = 0;
if (_getlogin_r(name, namelen) == NULL) {
if (errno == 0)
nerrno = EINVAL;
else
nerrno = errno;
}
errno = oerrno;
return (nerrno);
}
char *
getlogin(void)
{
char *answer = tsdalloc(_T_LOGIN, _POSIX_LOGIN_NAME_MAX, NULL);
if (answer == NULL)
return (NULL);
return (_getlogin_r(answer, _POSIX_LOGIN_NAME_MAX));
}
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