1.\" $NetBSD: sigset.3,v 1.3 2003/04/16 13:34:39 wiz Exp $ 2.\" 3.\" Copyright (c) 2003 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Klaus Klein. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 3. All advertising materials mentioning features or use of this software 18.\" must display the following acknowledgement: 19.\" This product includes software developed by the NetBSD 20.\" Foundation, Inc. and its contributors. 21.\" 4. Neither the name of The NetBSD Foundation nor the names of its 22.\" contributors may be used to endorse or promote products derived 23.\" from this software without specific prior written permission. 24.\" 25.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35.\" POSSIBILITY OF SUCH DAMAGE. 36.\" 37.Dd January 16, 2003 38.Dt SIGSET 3 39.Os 40.Sh NAME 41.Nm sigset 42.Nd manipulate signal dispositions 43.Sh LIBRARY 44.Lb libc 45.Sh SYNOPSIS 46.In signal.h 47.\" The following is Quite Ugly, but syntactically correct. Don't try to 48.\" fix it. 49.Ft void \*(lp* 50.Fn sigset "int sig" "void \*(lp*disp\*(rp\*(lpint\*(rp\*(rp\*(rp\*(lpint" 51.Sh DESCRIPTION 52.Bf -symbolic 53This interface is made obsolete by 54.Xr sigaction 2 55and 56.Xr sigprocmask 2 . 57.Ef 58.Pp 59The 60.Fn sigset 61function manipulates the disposition of the signal 62.Fa sig . 63The new disposition is given in 64.Fa disp . 65.Pp 66If 67.Fa disp 68is one of 69.Dv SIG_DFL , 70.Dv SIG_IGN , 71or the address of a handler function, 72the disposition of 73.Fa sig 74is changed accordingly, and 75.Fa sig 76is removed from the process' signal mask. 77Also, if 78.Fa disp 79is the address of a handler function, 80.Fa sig 81will be added to the process' signal mask during execution of the handler. 82.Pp 83If 84.Fa disp 85is equal to 86.Dv SIG_HOLD , 87.Fa sig 88is added to the calling process' signal mask and the disposition of 89.Fa sig 90remains unchanged. 91.Sh RETURN VALUES 92If successful, the 93.Fn sigset 94function returns 95.Dv SIG_HOLD 96if 97.Fa sig 98had been blocked, 99and the previous disposition of 100.Fa sig 101if it had not been blocked. 102Otherwise 103.Dv SIG_ERR 104is returned and 105.Va errno 106is set to indicate the error. 107.Sh ERRORS 108The 109.Fn sigignore 110function will fail if: 111.Bl -tag -width Er 112.It Bq Er EINVAL 113The argument 114.Fa sig 115is not a valid signal number. 116.It Bq Er EINVAL 117An attempt is made to ignore a signal that cannot be ignored, 118such as 119.Dv SIGKILL 120or 121.Dv SIGSTOP . 122.El 123.Sh SEE ALSO 124.Xr sigaction 2 , 125.Xr sigprocmask 2 126.Sh STANDARDS 127The 128.Fn sigignore 129function conforms to 130.St -p1003.1-2001 . 131