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-.\" Copyright (c) 1986, 1991, 1993
-.\"	The Regents of the University of California.  All rights reserved.
-.\"
-.\" 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
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"     @(#)sleep.3	8.1 (Berkeley) 6/4/93
-.\"
-.Dd February 13, 1998
-.Dt SLEEP 3
-.Os
-.Sh NAME
-.Nm sleep
-.Nd suspend thread execution for an interval measured in seconds
-.Sh LIBRARY
-.Lb libc
-.Sh SYNOPSIS
-.In unistd.h
-.Ft unsigned int
-.Fn sleep "unsigned int seconds"
-.Sh DESCRIPTION
-The
-.Fn sleep
-function suspends execution of the calling thread until either
-.Fa seconds
-seconds have elapsed or a signal is delivered to the thread and its
-action is to invoke a signal-catching function or to terminate the
-thread or process.
-System activity may lengthen the sleep by an indeterminate amount.
-.Pp
-This function is implemented using
-.Xr nanosleep 2
-by pausing for
-.Fa seconds
-seconds or until a signal occurs.
-Consequently, in this implementation,
-sleeping has no effect on the state of process timers,
-and there is no special handling for SIGALRM.
-.Sh RETURN VALUES
-If the
-.Fn sleep
-function returns because the requested time has elapsed, the value
-returned will be zero.
-If the
-.Fn sleep
-function returns due to the delivery of a signal, the value returned
-will be the unslept amount (the requested time minus the time actually
-slept) in seconds.
-.Sh SEE ALSO
-.Xr nanosleep 2 ,
-.Xr usleep 3
-.Sh STANDARDS
-The
-.Fn sleep
-function conforms to
-.St -p1003.1-90 .
-.Sh HISTORY
-A
-.Fn sleep
-function appeared in
-.At v7 .