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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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.\" 4. 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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