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+.\"	$OpenBSD: time.3,v 1.18 2021/12/11 13:34:38 tb Exp $
+.\"
+.\" Copyright (c) 1989, 1991, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" This code is derived from software contributed to Berkeley by
+.\" the American National Standards Committee X3, on Information
+.\" Processing Systems.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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+.\" SUCH DAMAGE.
+.\"
+.Dd $Mdocdate: December 11 2021 $
+.Dt TIME 3
+.Os
+.Sh NAME
+.Nm time
+.Nd get time of day
+.Sh SYNOPSIS
+.In time.h
+.Ft time_t
+.Fn time "time_t *now"
+.Sh DESCRIPTION
+The
+.Fn time
+function returns the number of seconds elapsed since
+Jan 1 1970 00:00:00 UTC.
+This value is also written to
+.Fa now
+unless
+.Fa now
+is
+.Dv NULL .
+.Sh RETURN VALUES
+The
+.Fn time
+function is always successful,
+and no return value is reserved to indicate an error.
+.Sh SEE ALSO
+.Xr clock_gettime 2 ,
+.Xr gettimeofday 2 ,
+.Xr ctime 3
+.Sh STANDARDS
+The
+.Fn time
+function conforms to
+.St -p1003.1-2008 .
+.Sh HISTORY
+A
+.Fn time
+system call first appeared in
+.At v1 .
+That version counted time in sixtieths of a second with a 32-bit return value,
+ensuring an integer overflow crisis every 2.26 years.
+In
+.At v6
+the granularity of the return value was reduced to whole seconds,
+delaying the aforementioned crisis until 2038.
+In
+.Bx 4.1c
+the function was moved out of the kernel into the C standard library and
+reimplemented with
+.Xr gettimeofday 2 .