1*86d7f5d3SJohn Marino.\" $NetBSD: time.9,v 1.1 1995/11/25 21:24:53 perry Exp $ 2*86d7f5d3SJohn Marino.\" 3*86d7f5d3SJohn Marino.\" Copyright (c) 1994 Christopher G. Demetriou 4*86d7f5d3SJohn Marino.\" All rights reserved. 5*86d7f5d3SJohn Marino.\" 6*86d7f5d3SJohn Marino.\" Redistribution and use in source and binary forms, with or without 7*86d7f5d3SJohn Marino.\" modification, are permitted provided that the following conditions 8*86d7f5d3SJohn Marino.\" are met: 9*86d7f5d3SJohn Marino.\" 1. Redistributions of source code must retain the above copyright 10*86d7f5d3SJohn Marino.\" notice, this list of conditions and the following disclaimer. 11*86d7f5d3SJohn Marino.\" 2. Redistributions in binary form must reproduce the above copyright 12*86d7f5d3SJohn Marino.\" notice, this list of conditions and the following disclaimer in the 13*86d7f5d3SJohn Marino.\" documentation and/or other materials provided with the distribution. 14*86d7f5d3SJohn Marino.\" 3. All advertising materials mentioning features or use of this software 15*86d7f5d3SJohn Marino.\" must display the following acknowledgement: 16*86d7f5d3SJohn Marino.\" This product includes software developed by Christopher G. Demetriou 17*86d7f5d3SJohn Marino.\" for the NetBSD Project. 18*86d7f5d3SJohn Marino.\" 3. The name of the author may not be used to endorse or promote products 19*86d7f5d3SJohn Marino.\" derived from this software without specific prior written permission 20*86d7f5d3SJohn Marino.\" 21*86d7f5d3SJohn Marino.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22*86d7f5d3SJohn Marino.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23*86d7f5d3SJohn Marino.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24*86d7f5d3SJohn Marino.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25*86d7f5d3SJohn Marino.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26*86d7f5d3SJohn Marino.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27*86d7f5d3SJohn Marino.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28*86d7f5d3SJohn Marino.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29*86d7f5d3SJohn Marino.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30*86d7f5d3SJohn Marino.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31*86d7f5d3SJohn Marino.\" 32*86d7f5d3SJohn Marino.\" $FreeBSD: src/share/man/man9/time.9,v 1.3.2.5 2001/08/17 13:08:54 ru Exp $ 33*86d7f5d3SJohn Marino.\" $DragonFly: src/share/man/man9/time.9,v 1.3 2008/04/09 21:41:59 swildner Exp $ 34*86d7f5d3SJohn Marino.\" 35*86d7f5d3SJohn Marino.Dd April 9, 2008 36*86d7f5d3SJohn Marino.Dt TIME 9 37*86d7f5d3SJohn Marino.Os 38*86d7f5d3SJohn Marino.Sh NAME 39*86d7f5d3SJohn Marino.Nm boottime , 40*86d7f5d3SJohn Marino.Nm time_second 41*86d7f5d3SJohn Marino.Nd system time variables 42*86d7f5d3SJohn Marino.Sh SYNOPSIS 43*86d7f5d3SJohn Marino.In sys/time.h 44*86d7f5d3SJohn Marino.Pp 45*86d7f5d3SJohn Marino.Vt extern struct timeval boottime ; 46*86d7f5d3SJohn Marino.Vt extern time_t time_second ; 47*86d7f5d3SJohn Marino.Sh DESCRIPTION 48*86d7f5d3SJohn MarinoThe 49*86d7f5d3SJohn Marino.Va boottime 50*86d7f5d3SJohn Marinovariable holds the system boot time. 51*86d7f5d3SJohn MarinoThe 52*86d7f5d3SJohn Marino.Va time_second 53*86d7f5d3SJohn Marinovariable is the system's 54*86d7f5d3SJohn Marino.Dq wall time 55*86d7f5d3SJohn Marinoclock to the second. 56*86d7f5d3SJohn Marino.Pp 57*86d7f5d3SJohn MarinoThe 58*86d7f5d3SJohn Marino.Xr microtime 9 , 59*86d7f5d3SJohn Marino.Xr getmicrotime 9 , 60*86d7f5d3SJohn Marino.Xr nanotime 9 , 61*86d7f5d3SJohn Marinoand 62*86d7f5d3SJohn Marino.Xr getnanotime 9 63*86d7f5d3SJohn Marinofunctions can be used to get the current time in an atomic manner. 64*86d7f5d3SJohn MarinoSimilarly, the 65*86d7f5d3SJohn Marino.Xr microuptime 9 , 66*86d7f5d3SJohn Marino.Xr getmicrouptime 9 , 67*86d7f5d3SJohn Marino.Xr nanouptime 9 , 68*86d7f5d3SJohn Marinoand 69*86d7f5d3SJohn Marino.Xr getnanouptime 9 70*86d7f5d3SJohn Marinofunctions can be used to get the time elapsed since boot in an atomic manner. 71*86d7f5d3SJohn MarinoThe 72*86d7f5d3SJohn Marino.Va boottime 73*86d7f5d3SJohn Marinovariable may be read and written without special precautions. 74*86d7f5d3SJohn Marino.Sh SEE ALSO 75*86d7f5d3SJohn Marino.Xr clock_settime 2 , 76*86d7f5d3SJohn Marino.Xr ntp_adjtime 2 , 77*86d7f5d3SJohn Marino.Xr settimeofday 2 , 78*86d7f5d3SJohn Marino.Xr inittodr 9 , 79*86d7f5d3SJohn Marino.Xr microtime 9 , 80*86d7f5d3SJohn Marino.Xr microuptime 9 81