// 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__