// getlogin.c

//

//

/*

 * Copyright (c) 1988, 1993

 *	The Regents of the University of California.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 4. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 */

 /* Portions Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. */

#if defined(LIBC_SCCS) && !defined(lint)

static char sccsid[] = "@(#)getlogin.c	8.1 (Berkeley) 6/4/93";

#endif /* LIBC_SCCS and not lint */

#include <sys/cdefs.h>

__FBSDID("$FreeBSD: src/lib/libc/gen/getlogin.c,v 1.9 2003/10/29 10:45:01 tjr Exp $");

#include <sys/param.h>

#include <errno.h>

#include <pwd.h>

#include <utmp.h>

#include <stdio.h>

#include <string.h>

#include <unistd.h>

#include "namespace.h"

#include <pthread.h>

#include "un-namespace.h"

#include "libc_private.h"

#define	THREAD_LOCK()	if (__isthreaded) _pthread_mutex_lock(&logname_mutex)

#define	THREAD_UNLOCK()	if (__isthreaded) _pthread_mutex_unlock(&logname_mutex)

extern int		_getlogin(char *, int);

int			_logname_valid;		/* known to setlogin() */

static pthread_mutex_t	logname_mutex = PTHREAD_MUTEX_INITIALIZER;

static char *

getlogin_basic(int *status)

{

	static char logname[MAXLOGNAME];

	if (_logname_valid == 0) {

		if (/*_getlogin(logname, sizeof(logname))  < 0*/ 1 ) {

			*status = errno;

			return (NULL);

		}

		_logname_valid = 1;

	}

	*status = 0;

	return (*logname ? logname : NULL);

}

char *

getlogin(void)

{

	char	*result;

	int	status;

	THREAD_LOCK();

	result = getlogin_basic(&status);

	THREAD_UNLOCK();

	return (result);

}

#ifndef __SYMBIAN32__

int

getlogin_r(char *logname, int namelen)

{

	char	*result;

	int	len;

	int	status;

	THREAD_LOCK();

	result = getlogin_basic(&status);

	if (status == 0) {

		if ((len = strlen(result) + 1) > namelen)

			status = ERANGE;

		else

			strncpy(logname, result, len);

	}

	THREAD_UNLOCK();

	return (status);

}

#endif //__SYMBIAN32__