read_local.c

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· C语言 代码 · 共 61 行

#ifndef lint
static	char	*sccsid = "@(#)read_local.c	4.1	(ULTRIX)	7/2/90";
#endif lint
/************************************************************************
 *									*
 *			Copyright (c) 1990 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.	*
 *									*
 ************************************************************************/
#ifdef	REFCLOCK
/*
 *  A dummy clock reading routine that reads the current system time.
 *  from the local host.  Its possible that this could be actually used
 *  if the system was in fact a very accurate time keeper (a true real-time
 *  system with good crystal clock or better).
 */

#include <sys/types.h>
#include <sys/time.h>

init_clock_local(file)
char *file;
{
	return getdtablesize();	/* invalid if we ever use it */
}

read_clock_local(cfd, tvp, mtvp)
int cfd;
struct timeval **tvp, **mtvp;
{
	static struct timeval realtime, mytime;

	gettimeofday(&realtime, 0);
	mytime = realtime;
	*tvp = &realtime;
	*mtvp = &mytime;
	return(0);
}
#endif