time.c

<B>Digital的Unix操作系统VAX 4.2源码</B>

#ifndef lint
static	char	*sccsid = "@(#)time.c	4.1	(ULTRIX)	7/3/90";
#endif lint

/************************************************************************
 *									*
 *			Copyright (c) 1985 by				*
 *		Digital Equipment Corporation, Maynard, MA		*
 *			All rights reserved.				*
 *									*
 *   This software is furnished under a license and may be used and	*
 *   copied  only  in accordance with the terms of such license and	*
 *   with the  inclusion  of  the  above  copyright  notice.   This	*
 *   software  or  any  other copies thereof may not be provided or	*
 *   otherwise made available to any other person.  No title to and	*
 *   ownership of the software is hereby transferred.			*
 *									*
 *   This software is  derived  from  software  received  from  the	*
 *   University    of   California,   Berkeley,   and   from   Bell	*
 *   Laboratories.  Use, duplication, or disclosure is  subject  to	*
 *   restrictions  under  license  agreements  with  University  of	*
 *   California and with AT&T.						*
 *									*
 *   The information in this software is subject to change  without	*
 *   notice  and should not be construed as a commitment by Digital	*
 *   Equipment Corporation.						*
 *									*
 *   Digital assumes no responsibility for the use  or  reliability	*
 *   of its software on equipment which is not supplied by Digital.	*
 *									*
 ************************************************************************/
/************************************************************************
 *			Modification History				*
 *									*
 *	David L Ballenger, 30-Mar-1985					*
 * 0001	Add defintions for System V compatibility.			*
 *									*
 ************************************************************************/

/*	time.c	4.2	83/02/27	*/

/*
 * Backwards compatible time call.
 */
#include <sys/types.h>
#include <sys/time.h>
/*
 * The return value types differ between ULTRIX and System V
 */
#ifndef SYSTEM_FIVE
#define RETURN_TYPE time_t
#else	SYSTEM_FIVE
#define RETURN_TYPE long
#endif	SYSTEM_FIVE

RETURN_TYPE
time(t)
	RETURN_TYPE *t;
{
	struct timeval tt;

	if (gettimeofday(&tt, (struct timezone *)0) < 0)
		return (-1);
	if (t)
		*t = tt.tv_sec;
	return (tt.tv_sec);
}