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. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)sigpause.2 8.1 (Berkeley) 6/2/93 33.\" $FreeBSD$ 34.\" 35.Dd June 2, 1993 36.Dt SIGPAUSE 2 37.Os 38.Sh NAME 39.Nm sigpause 40.Nd atomically release blocked signals and wait for interrupt 41.Sh LIBRARY 42.Lb libc 43.Sh SYNOPSIS 44.In signal.h 45.Ft int 46.Fn sigpause "int sigmask" 47.Sh DESCRIPTION 48.Sy This interface is made obsolete by 49.Xr sigsuspend 2 . 50.Pp 51The 52.Fn sigpause 53function 54assigns 55.Fa sigmask 56to the set of masked signals 57and then waits for a signal to arrive; 58on return the set of masked signals is restored. 59The 60.Fa sigmask 61argument 62is usually 0 to indicate that no 63signals are to be blocked. 64The 65.Fn sigpause 66function 67always terminates by being interrupted, returning -1 with 68.Va errno 69set to 70.Er EINTR 71.Sh SEE ALSO 72.Xr kill 2 , 73.Xr sigaction 2 , 74.Xr sigblock 2 , 75.Xr sigprocmask 2 , 76.Xr sigsuspend 2 , 77.Xr sigvec 2 78.Sh STANDARDS 79The 80.Fn sigpause 81function is implemented for compatibility with historic 82.Bx 4.3 83applications. 84An incompatible interface by the same name, which used a single signal number 85rather than a mask, was present in 86.At V , 87and was copied from there into the 88.Sy X/Open System Interfaces 89.Pq Tn XSI 90option of 91.St -p1003.1-2001 . 92.Sh HISTORY 93The 94.Fn sigpause 95function appeared in 96.Bx 4.2 97and has been deprecated. 98