1*2fe8fb19SBen Gras.\" $NetBSD: sleep.3,v 1.15 2003/08/07 16:42:57 agc Exp $ 2*2fe8fb19SBen Gras.\" 3*2fe8fb19SBen Gras.\" Copyright (c) 1986, 1991, 1993 4*2fe8fb19SBen Gras.\" The Regents of the University of California. All rights reserved. 5*2fe8fb19SBen Gras.\" 6*2fe8fb19SBen Gras.\" Redistribution and use in source and binary forms, with or without 7*2fe8fb19SBen Gras.\" modification, are permitted provided that the following conditions 8*2fe8fb19SBen Gras.\" are met: 9*2fe8fb19SBen Gras.\" 1. Redistributions of source code must retain the above copyright 10*2fe8fb19SBen Gras.\" notice, this list of conditions and the following disclaimer. 11*2fe8fb19SBen Gras.\" 2. Redistributions in binary form must reproduce the above copyright 12*2fe8fb19SBen Gras.\" notice, this list of conditions and the following disclaimer in the 13*2fe8fb19SBen Gras.\" documentation and/or other materials provided with the distribution. 14*2fe8fb19SBen Gras.\" 3. Neither the name of the University nor the names of its contributors 15*2fe8fb19SBen Gras.\" may be used to endorse or promote products derived from this software 16*2fe8fb19SBen Gras.\" without specific prior written permission. 17*2fe8fb19SBen Gras.\" 18*2fe8fb19SBen Gras.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19*2fe8fb19SBen Gras.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20*2fe8fb19SBen Gras.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21*2fe8fb19SBen Gras.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22*2fe8fb19SBen Gras.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23*2fe8fb19SBen Gras.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24*2fe8fb19SBen Gras.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25*2fe8fb19SBen Gras.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26*2fe8fb19SBen Gras.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27*2fe8fb19SBen Gras.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28*2fe8fb19SBen Gras.\" SUCH DAMAGE. 29*2fe8fb19SBen Gras.\" 30*2fe8fb19SBen Gras.\" @(#)sleep.3 8.1 (Berkeley) 6/4/93 31*2fe8fb19SBen Gras.\" 32*2fe8fb19SBen Gras.Dd June 4, 1993 33*2fe8fb19SBen Gras.Dt SLEEP 3 34*2fe8fb19SBen Gras.Os 35*2fe8fb19SBen Gras.Sh NAME 36*2fe8fb19SBen Gras.Nm sleep 37*2fe8fb19SBen Gras.Nd suspend process execution for interval of seconds 38*2fe8fb19SBen Gras.Sh LIBRARY 39*2fe8fb19SBen Gras.Lb libc 40*2fe8fb19SBen Gras.Sh SYNOPSIS 41*2fe8fb19SBen Gras.In unistd.h 42*2fe8fb19SBen Gras.Ft unsigned int 43*2fe8fb19SBen Gras.Fn sleep "unsigned int seconds" 44*2fe8fb19SBen Gras.Sh DESCRIPTION 45*2fe8fb19SBen GrasThe 46*2fe8fb19SBen Gras.Fn sleep 47*2fe8fb19SBen Grasfunction suspends execution of the calling process until either the 48*2fe8fb19SBen Grasnumber of seconds specified by 49*2fe8fb19SBen Gras.Fa seconds 50*2fe8fb19SBen Grashave elapsed or a signal is delivered to the calling process and its 51*2fe8fb19SBen Grasaction is to invoke a signal-catching function or to terminate the 52*2fe8fb19SBen Grasprocess. 53*2fe8fb19SBen GrasThe suspension time may be longer than requested due to the 54*2fe8fb19SBen Grasscheduling of other activity by the system. 55*2fe8fb19SBen Gras.Sh RETURN VALUES 56*2fe8fb19SBen GrasIf the 57*2fe8fb19SBen Gras.Fn sleep 58*2fe8fb19SBen Grasfunction returns because the requested time has elapsed, the value 59*2fe8fb19SBen Grasreturned will be zero. 60*2fe8fb19SBen GrasIf the 61*2fe8fb19SBen Gras.Fn sleep 62*2fe8fb19SBen Grasfunction returns due to the delivery of a signal, the value returned 63*2fe8fb19SBen Graswill be the unslept amount (the request time minus the time actually 64*2fe8fb19SBen Grasslept) in seconds. 65*2fe8fb19SBen Gras.Sh SEE ALSO 66*2fe8fb19SBen Gras.Xr nanosleep 2 , 67*2fe8fb19SBen Gras.Xr usleep 3 68*2fe8fb19SBen Gras.Sh STANDARDS 69*2fe8fb19SBen GrasThe 70*2fe8fb19SBen Gras.Fn sleep 71*2fe8fb19SBen Grasfunction conforms to 72*2fe8fb19SBen Gras.St -p1003.1-90 . 73*2fe8fb19SBen Gras.Sh HISTORY 74*2fe8fb19SBen GrasA 75*2fe8fb19SBen Gras.Fn sleep 76*2fe8fb19SBen Grasfunction appeared in 77*2fe8fb19SBen Gras.At v7 . 78