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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. All advertising materials mentioning features or use of this software
-.\"    must display the following acknowledgement:
-.\"	This product includes software developed by the University of
-.\"	California, Berkeley and its contributors.
-.\" 4. 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 June 4, 1993
-.Dt SLEEP 3
-.Os
-.Sh NAME
-.Nm sleep
-.Nd suspend process execution for interval of seconds
-.Sh SYNOPSIS
-.Fd #include <unistd.h>
-.Ft u_int
-.Fn sleep "u_int seconds"
-.Sh DESCRIPTION
-The
-.Fn sleep
-function
-suspends execution of the calling process
-for
-.Fa seconds
-of time.
-System activity or time spent in processing the
-call may lengthen the sleep by a second.
-.Pp
-If a timer is already running on the process its state is unaltered by
-this
-.Fn sleep
-implementation.
-If the value
-.Fa seconds
-is more than or equal to the remaining clock time for the running timer,
-the sleep time is set to
-the remaining clock time.
-.Pp
-This function is implemented using
-.Xr nanosleep 2
-by pausing for
-.Fa seconds
-of time or until any signal occurse.
-.Sh RETURN VALUES
-The
-.Fn sleep
-function returns the number of seconds remaining to complete the operation. If
-sleep is interrupted or cannot allocate a timer it may will return the value
-needed to be passed to a subsequent sleep to complete the necessary delay.
-.Fn sleep
-repeatedly until it returns zero may busy-wait until a timer
-is available.
-.Sh SEE ALSO
-.Xr nanosleep 2 ,
-.Xr setitimer 2 ,
-.Xr alarm 3 ,
-.Xr signal 3 ,
-.Xr ualarm 3 ,
-.Xr usleep 3
-.Sh HISTORY
-A
-.Fn sleep
-function appeared in
-.At v7 .