1.\" Copyright (c) 1983, 1991 The Regents of the University of California. 2.\" 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.\" $OpenBSD: sigpause.3,v 1.15 2022/12/13 06:56:06 jmc Exp $ 29.\" 30.Dd $Mdocdate: December 13 2022 $ 31.Dt SIGPAUSE 3 32.Os 33.Sh NAME 34.Nm sigpause 35.Nd atomically release blocked signals and wait for interrupt 36.Sh SYNOPSIS 37.In signal.h 38.Ft int 39.Fn sigpause "int sigmask" 40.Sh DESCRIPTION 41.Bf -symbolic 42This interface is made obsolete by 43.Xr sigsuspend 2 . 44.Ef 45.Pp 46.Fn sigpause 47assigns 48.Fa sigmask 49to the set of masked signals 50and then waits for a signal to arrive; 51on return the set of masked signals is restored. 52.Fa sigmask 53is usually 0 to indicate that no 54signals are to be blocked. 55.Fn sigpause 56always terminates by being interrupted, returning \-1 with 57.Va errno 58set to 59.Er EINTR . 60.Sh SEE ALSO 61.Xr kill 2 , 62.Xr sigaction 2 , 63.Xr sigprocmask 2 , 64.Xr sigsuspend 2 , 65.Xr sigblock 3 , 66.Xr sigvec 3 67.Sh HISTORY 68A 69.Fn sigpause 70system call first appeared in 71.Bx 4.2 . 72In 73.Bx 4.3 Reno , 74it was reimplemented as a wrapper around 75.Xr sigsuspend 2 . 76The old system call was kept for compatibility until 77.Ox 4.9 . 78