sl@0: // getlogin.c
sl@0: //
sl@0: //
sl@0: /*
sl@0:  * Copyright (c) 1988, 1993
sl@0:  *	The Regents of the University of California.  All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 4. Neither the name of the University nor the names of its contributors
sl@0:  *    may be used to endorse or promote products derived from this software
sl@0:  *    without specific prior written permission.
sl@0:  *
sl@0:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
sl@0:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
sl@0:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
sl@0:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
sl@0:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
sl@0:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
sl@0:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
sl@0:  * SUCH DAMAGE.
sl@0:  */
sl@0: 
sl@0:  /* Portions Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. */
sl@0:  
sl@0: #if defined(LIBC_SCCS) && !defined(lint)
sl@0: static char sccsid[] = "@(#)getlogin.c	8.1 (Berkeley) 6/4/93";
sl@0: #endif /* LIBC_SCCS and not lint */
sl@0: #include <sys/cdefs.h>
sl@0: __FBSDID("$FreeBSD: src/lib/libc/gen/getlogin.c,v 1.9 2003/10/29 10:45:01 tjr Exp $");
sl@0: 
sl@0: #include <sys/param.h>
sl@0: #include <errno.h>
sl@0: #include <pwd.h>
sl@0: #include <utmp.h>
sl@0: #include <stdio.h>
sl@0: #include <string.h>
sl@0: #include <unistd.h>
sl@0: #include "namespace.h"
sl@0: #include <pthread.h>
sl@0: #include "un-namespace.h"
sl@0: 
sl@0: #include "libc_private.h"
sl@0: 
sl@0: #define	THREAD_LOCK()	if (__isthreaded) _pthread_mutex_lock(&logname_mutex)
sl@0: #define	THREAD_UNLOCK()	if (__isthreaded) _pthread_mutex_unlock(&logname_mutex)
sl@0: 
sl@0: extern int		_getlogin(char *, int);
sl@0: 
sl@0: int			_logname_valid;		/* known to setlogin() */
sl@0: static pthread_mutex_t	logname_mutex = PTHREAD_MUTEX_INITIALIZER;
sl@0: 
sl@0: static char *
sl@0: getlogin_basic(int *status)
sl@0: {
sl@0: 	static char logname[MAXLOGNAME];
sl@0: 
sl@0: 	if (_logname_valid == 0) {
sl@0: 		if (/*_getlogin(logname, sizeof(logname))  < 0*/ 1 ) {
sl@0: 			*status = errno;
sl@0: 			return (NULL);
sl@0: 		}
sl@0: 		_logname_valid = 1;
sl@0: 	}
sl@0: 	*status = 0;
sl@0: 	return (*logname ? logname : NULL);
sl@0: }
sl@0: 
sl@0: char *
sl@0: getlogin(void)
sl@0: {
sl@0: 	char	*result;
sl@0: 	int	status;
sl@0: 
sl@0: 	THREAD_LOCK();
sl@0: 	result = getlogin_basic(&status);
sl@0: 	THREAD_UNLOCK();
sl@0: 	return (result);
sl@0: }
sl@0: 
sl@0: #ifndef __SYMBIAN32__
sl@0: int
sl@0: getlogin_r(char *logname, int namelen)
sl@0: {
sl@0: 	char	*result;
sl@0: 	int	len;
sl@0: 	int	status;
sl@0: 	
sl@0: 	THREAD_LOCK();
sl@0: 	result = getlogin_basic(&status);
sl@0: 	if (status == 0) {
sl@0: 		if ((len = strlen(result) + 1) > namelen)
sl@0: 			status = ERANGE;
sl@0: 		else
sl@0: 			strncpy(logname, result, len);
sl@0: 	}
sl@0: 	THREAD_UNLOCK();
sl@0: 	return (status);
sl@0: }
sl@0: #endif //__SYMBIAN32__