131 lines
3.6 KiB
Groff
131 lines
3.6 KiB
Groff
.\" $NetBSD: sigset.3,v 1.5 2005/07/24 21:58:32 rpaulo Exp $
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.\"
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.\" Copyright (c) 2003 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Klaus Klein.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the NetBSD
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.\" Foundation, Inc. and its contributors.
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.\" 4. Neither the name of The NetBSD Foundation nor the names of its
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.\" contributors may be used to endorse or promote products derived
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.\" from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd July 24, 2005
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.Dt SIGSET 3
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.Os
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.Sh NAME
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.Nm sigset
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.Nd manipulate signal dispositions
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In signal.h
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.\" The following is Quite Ugly, but syntactically correct. Don't try to
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.\" fix it.
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.Ft void \*(lp*
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.Fn sigset "int sig" "void \*(lp*disp\*(rp\*(lpint\*(rp\*(rp\*(rp\*(lpint"
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.Sh DESCRIPTION
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.Bf -symbolic
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This interface is made obsolete by
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.Xr sigaction 2
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and
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.Xr sigprocmask 2 .
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.Ef
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.Pp
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The
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.Fn sigset
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function manipulates the disposition of the signal
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.Fa sig .
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The new disposition is given in
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.Fa disp .
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.Pp
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If
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.Fa disp
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is one of
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.Dv SIG_DFL ,
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.Dv SIG_IGN ,
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or the address of a handler function,
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the disposition of
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.Fa sig
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is changed accordingly, and
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.Fa sig
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is removed from the process' signal mask.
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Also, if
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.Fa disp
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is the address of a handler function,
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.Fa sig
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will be added to the process' signal mask during execution of the handler.
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.Pp
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If
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.Fa disp
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is equal to
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.Dv SIG_HOLD ,
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.Fa sig
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is added to the calling process' signal mask and the disposition of
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.Fa sig
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remains unchanged.
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.Sh RETURN VALUES
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If successful, the
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.Fn sigset
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function returns
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.Dv SIG_HOLD
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if
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.Fa sig
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had been blocked,
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and the previous disposition of
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.Fa sig
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if it had not been blocked.
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Otherwise
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.Dv SIG_ERR
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is returned and
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.Va errno
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is set to indicate the error.
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.Sh ERRORS
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The
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.Fn sigset
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function will fail if:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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The argument
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.Fa sig
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is not a valid signal number.
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.It Bq Er EINVAL
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An attempt is made to ignore a signal that cannot be ignored,
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such as
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.Dv SIGKILL
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or
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.Dv SIGSTOP .
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.El
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.Sh SEE ALSO
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.Xr sigaction 2 ,
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.Xr sigprocmask 2
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.Sh STANDARDS
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The
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.Fn sigset
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function conforms to
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.St -p1003.1-2001 .
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