1.\" $NetBSD: sighold.3,v 1.5 2010/04/30 04:39:16 jruoho 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.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28.\" POSSIBILITY OF SUCH DAMAGE. 29.\" 30.Dd April 30, 2010 31.Dt SIGHOLD 3 32.Os 33.Sh NAME 34.Nm sighold 35.Nd manipulate current signal mask 36.Sh LIBRARY 37.Lb libc 38.Sh SYNOPSIS 39.In signal.h 40.Ft int 41.Fn sighold "int sig" 42.Sh DESCRIPTION 43.Bf -symbolic 44This interface is made obsolete by 45.Xr sigprocmask 2 . 46.Ef 47.Pp 48The 49.Fn sighold 50function adds the signal 51.Fa sig 52to the calling process' signal mask. 53.Sh RETURN VALUES 54If successful, the 55.Fn sighold 56function returns 0. 57Otherwise \-1 is returned and 58.Va errno 59is set to indicate the error. 60.Sh ERRORS 61The 62.Fn sighold 63function will fail if: 64.Bl -tag -width Er 65.It Bq Er EINVAL 66The argument 67.Fa sig 68is not a valid signal number. 69.El 70.Sh SEE ALSO 71.Xr sigprocmask 2 , 72.Xr sigrelse 3 73.Sh STANDARDS 74The 75.Fn sighold 76function conforms to 77.St -p1003.1-2001 . 78It was however marked as obsolete in the 79.St -p1003.1-2008 80revision of the standard. 81