1.\" Copyright (c) 1983, 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.\" @(#)sigpause.2 8.1 (Berkeley) 6/2/93 29.\" $FreeBSD: src/lib/libc/compat-43/sigpause.2,v 1.5.2.6 2003/03/15 15:11:05 trhodes Exp $ 30.\" 31.Dd November 26, 2016 32.Dt SIGPAUSE 3 33.Os 34.Sh NAME 35.Nm sigpause 36.Nd atomically release blocked signals and wait for interrupt 37.Sh LIBRARY 38.Lb libc 39.Sh SYNOPSIS 40.In signal.h 41.Ft int 42.Fn sigpause "int sigmask" 43.Sh DESCRIPTION 44.Sy This interface is made obsolete by 45.Xr sigsuspend 2 . 46.Pp 47The 48.Fn sigpause 49function 50assigns 51.Fa sigmask 52to the set of masked signals 53and then waits for a signal to arrive; 54on return the set of masked signals is restored. 55The 56.Fa sigmask 57argument 58is usually 0 to indicate that no 59signals are to be blocked. 60The 61.Fn sigpause 62function 63always terminates by being interrupted, returning -1 with 64.Va errno 65set to 66.Er EINTR 67.Sh SEE ALSO 68.Xr kill 2 , 69.Xr sigaction 2 , 70.Xr sigprocmask 2 , 71.Xr sigsuspend 2 , 72.Xr sigblock 3 , 73.Xr sigvec 3 74.Sh HISTORY 75The 76.Fn sigpause 77function appeared in 78.Bx 4.2 79and has been deprecated. 80