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.\" 30.Dd April 3, 2022 31.Dt PAUSE 3 32.Os 33.Sh NAME 34.Nm pause 35.Nd stop until signal 36.Sh LIBRARY 37.Lb libc 38.Sh SYNOPSIS 39.In unistd.h 40.Ft int 41.Fn pause void 42.Sh DESCRIPTION 43.Sy Pause is made obsolete by 44.Xr sigsuspend 2 . 45.Pp 46The 47.Fn pause 48function 49forces a process to pause until 50a signal is received from either the 51.Xr kill 2 52function 53or an interval timer. 54(See 55.Xr setitimer 2 . ) 56Upon termination of a signal handler started during a 57.Fn pause , 58the 59.Fn pause 60call will return. 61.Sh RETURN VALUES 62Always returns \-1. 63.Sh ERRORS 64The 65.Fn pause 66function 67always returns: 68.Bl -tag -width Er 69.It Bq Er EINTR 70The call was interrupted. 71.El 72.Sh SEE ALSO 73.Xr kill 2 , 74.Xr select 2 , 75.Xr sigsuspend 2 76.Sh HISTORY 77A 78.Fn pause 79system call first appeared in the Programmer's Workbench (PWB/UNIX) 80and was then ported to 81.At v7 . 82It was reimplemeted as a wrapper around the 83.Fn sigpause 84and 85.Fn sigblock 86system calls in 87.Bx 4.2 , 88and around the 89.Xr sigsuspend 2 90and 91.Xr sigprocmask 2 92system calls in 93.Bx 4.3 Reno . 94