1.\" $NetBSD: time.3,v 1.11 2002/10/01 16:59:48 wiz Exp $ 2.\" 3.\" Copyright (c) 1989, 1991, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" This code is derived from software contributed to Berkeley by 7.\" the American National Standards Committee X3, on Information 8.\" Processing Systems. 9.\" 10.\" Redistribution and use in source and binary forms, with or without 11.\" modification, are permitted provided that the following conditions 12.\" are met: 13.\" 1. Redistributions of source code must retain the above copyright 14.\" notice, this list of conditions and the following disclaimer. 15.\" 2. Redistributions in binary form must reproduce the above copyright 16.\" notice, this list of conditions and the following disclaimer in the 17.\" documentation and/or other materials provided with the distribution. 18.\" 3. All advertising materials mentioning features or use of this software 19.\" must display the following acknowledgement: 20.\" This product includes software developed by the University of 21.\" California, Berkeley and its contributors. 22.\" 4. Neither the name of the University nor the names of its contributors 23.\" may be used to endorse or promote products derived from this software 24.\" without specific prior written permission. 25.\" 26.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36.\" SUCH DAMAGE. 37.\" 38.\" @(#)time.3 8.1 (Berkeley) 6/4/93 39.\" 40.Dd June 4, 1993 41.Dt TIME 3 42.Os 43.Sh NAME 44.Nm time 45.Nd get time of day 46.Sh LIBRARY 47.Lb libc 48.Sh SYNOPSIS 49.Fd #include \*[Lt]time.h\*[Gt] 50.Ft time_t 51.Fn time "time_t *tloc" 52.Sh DESCRIPTION 53The 54.Fn time 55function 56returns the value of time in seconds since 0 hours, 0 minutes, 570 seconds, January 1, 1970, Coordinated Universal Time. 58.Pp 59A copy of the time value may be saved to the area indicated by the 60pointer 61.Fa tloc . 62If 63.Fa tloc 64is a 65.Dv NULL 66pointer, no value is stored. 67.Pp 68Upon successful completion, 69.Fn time 70returns the value of time. 71Otherwise a value of 72.Po 73.Po Fa time_t Pc \-1 74.Pc 75is returned and the global variable 76.Va errno 77is set to indicate the error. 78.Sh ERRORS 79The following error codes may be set in 80.Va errno : 81.Bl -tag -width Er 82.It Bq Er EFAULT 83An argument address referenced invalid memory. 84.El 85.Sh SEE ALSO 86.Xr gettimeofday 2 , 87.Xr ctime 3 88.Sh STANDARDS 89The 90.Fn time 91function conforms to 92.St -p1003.1-90 . 93.Sh HISTORY 94A 95.Fn time 96function appeared in 97.At v6 . 98