1.\" $OpenBSD: time.3,v 1.2 1996/08/19 08:26:37 tholo 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.Dd June 4, 1993 39.Dt TIME 3 40.Os BSD 4 41.Sh NAME 42.Nm time 43.Nd get time of day 44.Sh SYNOPSIS 45.Fd #include <time.h> 46.Ft time_t 47.Fn time "time_t *tloc" 48.Sh DESCRIPTION 49The 50.Fn time 51function 52returns the value of time in seconds since 0 hours, 0 minutes, 530 seconds, January 1, 1970, Coordinated Universal Time. 54.Pp 55A copy of the time value may be saved to the area indicated by the 56pointer 57.Fa tloc . 58If 59.Fa tloc 60is a NULL pointer, no value is stored. 61.Pp 62Upon successful completion, 63.Fn time 64returns the value of time. 65Otherwise a value of 66.Po 67.Po Fa time_t Pc \-1 68.Pc 69is returned and the global variable 70.Va errno 71is set to indicate the error. 72.Sh ERRORS 73The following error codes may be set in 74.Va errno : 75.Bl -tag -width Er 76.It Bq Er EFAULT 77An argument address referenced invalid memory. 78.Sh SEE ALSO 79.Xr gettimeofday 2 , 80.Xr ctime 3 81.Sh HISTORY 82A 83.Fn time 84function appeared in 85.At v6 . 86