7e6cabd06e
Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
104 lines
2.8 KiB
Groff
104 lines
2.8 KiB
Groff
.\" Copyright (c) 1983, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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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. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)sigsetmask.2 8.1 (Berkeley) 6/2/93
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.\" $FreeBSD$
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.\"
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.Dd June 2, 1993
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.Dt SIGSETMASK 2
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.Os
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.Sh NAME
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.Nm sigsetmask ,
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.Nm sigblock
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.Nd manipulate current signal mask
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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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.Ft int
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.Fn sigsetmask "int mask"
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.Ft int
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.Fn sigblock "int mask"
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.Ft int
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.Fn sigmask "int signum"
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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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.Ef
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.Xr sigprocmask 2 .
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.Pp
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The
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.Fn sigsetmask
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function
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sets the current signal mask to the specified
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.Fa mask .
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Signals are blocked from delivery if the corresponding bit in
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.Fa mask
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is a 1.
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The
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.Fn sigblock
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function
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adds the signals in the specified
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.Fa mask
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to the current signal mask,
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rather than overwriting it as
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.Fn sigsetmask
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does.
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The macro
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.Fn sigmask
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is provided to construct the mask for a given
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.Fa signum .
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.Pp
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The system
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quietly disallows
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.Dv SIGKILL
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or
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.Dv SIGSTOP
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to be blocked.
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.Sh RETURN VALUES
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The
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.Fn sigblock
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and
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.Fn sigsetmask
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functions
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return the previous set of masked signals.
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.Sh SEE ALSO
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.Xr kill 2 ,
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.Xr sigaction 2 ,
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.Xr sigprocmask 2 ,
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.Xr sigsuspend 2 ,
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.Xr sigvec 2 ,
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.Xr sigsetops 3
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.Sh HISTORY
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The
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.Fn sigsetmask
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and
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.Fn sigblock
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functions first appeared in
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.Bx 4.2
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and have been deprecated.
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