1.\" Copyright (c) 1980, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" @(#)pause.3 8.1 (Berkeley) 6/4/93 29.\" $FreeBSD$ 30.\" 31.Dd April 3, 2022 32.Dt PAUSE 3 33.Os 34.Sh NAME 35.Nm pause 36.Nd stop until signal 37.Sh LIBRARY 38.Lb libc 39.Sh SYNOPSIS 40.In unistd.h 41.Ft int 42.Fn pause void 43.Sh DESCRIPTION 44.Sy Pause is made obsolete by 45.Xr sigsuspend 2 . 46.Pp 47The 48.Fn pause 49function 50forces a process to pause until 51a signal is received from either the 52.Xr kill 2 53function 54or an interval timer. 55(See 56.Xr setitimer 2 . ) 57Upon termination of a signal handler started during a 58.Fn pause , 59the 60.Fn pause 61call will return. 62.Sh RETURN VALUES 63Always returns \-1. 64.Sh ERRORS 65The 66.Fn pause 67function 68always returns: 69.Bl -tag -width Er 70.It Bq Er EINTR 71The call was interrupted. 72.El 73.Sh SEE ALSO 74.Xr kill 2 , 75.Xr select 2 , 76.Xr sigsuspend 2 77.Sh HISTORY 78A 79.Fn pause 80system call first appeared in the Programmer's Workbench (PWB/UNIX) 81and was then ported to 82.At v7 . 83It was reimplemeted as a wrapper around the 84.Fn sigpause 85and 86.Fn sigblock 87system calls in 88.Bx 4.2 , 89and around the 90.Xr sigsuspend 2 91and 92.Xr sigprocmask 2 93system calls in 94.Bx 4.3 Reno . 95