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.\" @(#)sigsetops.3 8.1 (Berkeley) 6/4/93 33.\" 34.Dd June 4, 1993 35.Dt SIGSETOPS 3 36.Os 37.Sh NAME 38.Nm sigemptyset , 39.Nm sigfillset , 40.Nm sigaddset , 41.Nm sigdelset , 42.Nm sigismember 43.Nd manipulate signal sets 44.Sh SYNOPSIS 45.Fd #include <signal.h> 46.Fn sigemptyset "sigset_t *set" 47.Fn sigfillset "sigset_t *set" 48.Fn sigaddset "sigset_t *set" "int signo" 49.Fn sigdelset "sigset_t *set" "int signo" 50.Fn sigismember "sigset_t *set" "int signo" 51.Sh DESCRIPTION 52These functions manipulate signal sets stored in a 53.Fa sigset_t . 54Either 55.Fn sigemptyset 56or 57.Fn sigfillset 58must be called for every object of type 59.Fa sigset_t 60before any other use of the object. 61.Pp 62The 63.Fn sigemptyset 64function initializes a signal set to be empty. 65.Pp 66The 67.Fn sigfillset 68function initializes a signal set to contain all signals. 69.Pp 70The 71.Fn sigaddset 72function adds the specified signal 73.Fa signo 74to the signal set. 75.Pp 76The 77.Fn sigdelset 78function deletes the specified signal 79.Fa signo 80from the signal set. 81.Pp 82The 83.Fn sigismember 84function returns whether a specified signal 85.Fa signo 86is contained in the signal set. 87.Pp 88These functions 89are provided as macros in the include file <signal.h>. 90Actual functions are available 91if their names are undefined (with #undef 92.Em name ) . 93.Sh RETURN VALUES 94The 95.Fn sigismember 96function returns 1 97if the signal is a member of the set, 980 otherwise. 99The other functions return 0. 100.Sh ERRORS 101Currently no errors are detected. 102.Sh SEE ALSO 103.Xr kill 2 , 104.Xr sigaction 2 , 105.Xr sigsuspend 2 106.Sh STANDARDS 107These functions are defined by 108.St -p1003.1-88 . 109