126 lines
3.2 KiB
Groff
126 lines
3.2 KiB
Groff
.\" $NetBSD: sigset.3,v 1.8 2010/04/30 06:48:20 wiz Exp $
|
|
.\"
|
|
.\" Copyright (c) 2003 The NetBSD Foundation, Inc.
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" This code is derived from software contributed to The NetBSD Foundation
|
|
.\" by Klaus Klein.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
.\" POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.Dd April 30, 2010
|
|
.Dt SIGSET 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm sigset
|
|
.Nd manipulate signal dispositions
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In signal.h
|
|
.\" The following is Quite Ugly, but syntactically correct. Don't try to
|
|
.\" fix it.
|
|
.Ft void \*(lp*
|
|
.Fn sigset "int sig" "void \*(lp*disp\*(rp\*(lpint\*(rp\*(rp\*(rp\*(lpint"
|
|
.Sh DESCRIPTION
|
|
.Bf -symbolic
|
|
This interface is made obsolete by
|
|
.Xr sigaction 2
|
|
and
|
|
.Xr sigprocmask 2 .
|
|
.Ef
|
|
.Pp
|
|
The
|
|
.Fn sigset
|
|
function manipulates the disposition of the signal
|
|
.Fa sig .
|
|
The new disposition is given in
|
|
.Fa disp .
|
|
.Pp
|
|
If
|
|
.Fa disp
|
|
is one of
|
|
.Dv SIG_DFL ,
|
|
.Dv SIG_IGN ,
|
|
or the address of a handler function,
|
|
the disposition of
|
|
.Fa sig
|
|
is changed accordingly, and
|
|
.Fa sig
|
|
is removed from the process' signal mask.
|
|
Also, if
|
|
.Fa disp
|
|
is the address of a handler function,
|
|
.Fa sig
|
|
will be added to the process' signal mask during execution of the handler.
|
|
.Pp
|
|
If
|
|
.Fa disp
|
|
is equal to
|
|
.Dv SIG_HOLD ,
|
|
.Fa sig
|
|
is added to the calling process' signal mask and the disposition of
|
|
.Fa sig
|
|
remains unchanged.
|
|
.Sh RETURN VALUES
|
|
If successful, the
|
|
.Fn sigset
|
|
function returns
|
|
.Dv SIG_HOLD
|
|
if
|
|
.Fa sig
|
|
had been blocked,
|
|
and the previous disposition of
|
|
.Fa sig
|
|
if it had not been blocked.
|
|
Otherwise
|
|
.Dv SIG_ERR
|
|
is returned and
|
|
.Va errno
|
|
is set to indicate the error.
|
|
.Sh ERRORS
|
|
The
|
|
.Fn sigset
|
|
function will fail if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EINVAL
|
|
The argument
|
|
.Fa sig
|
|
is not a valid signal number;
|
|
or an attempt is made to ignore a signal that cannot be ignored,
|
|
such as
|
|
.Dv SIGKILL
|
|
or
|
|
.Dv SIGSTOP .
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr sigaction 2 ,
|
|
.Xr sigprocmask 2
|
|
.Sh STANDARDS
|
|
The
|
|
.Fn sigset
|
|
function conforms to
|
|
.St -p1003.1-2001 .
|
|
It was however marked as obsolete in the
|
|
.St -p1003.1-2008
|
|
revision of the standard.
|