2003-06-08 10:44:28 +04:00
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.\" $NetBSD: pthread_sigmask.3,v 1.2 2003/06/08 06:44:34 thorpej Exp $
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2003-06-04 01:33:06 +04:00
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.\"
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.\" Copyright (c) 2002 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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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 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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.\" 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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.\" Copyright (C) 2000 Jason Evans <jasone@FreeBSD.org>.
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.\" 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(s), this list of conditions and the following disclaimer as
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.\" the first lines of this file unmodified other than the possible
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.\" addition of one or more copyright notices.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice(s), this list of conditions and the following disclaimer in
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.\" the documentation and/or other materials provided with the
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.\" distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
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.\" EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
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.\" 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
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.\" BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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.\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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.\" OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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.\" EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD: src/lib/libpthread/man/pthread_sigmask.3,v 1.10 2002/09/16 19:29:29 mini Exp $
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.Dd January 30, 2003
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.Dt PTHREAD_SIGMASK 3
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.Os
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.Sh NAME
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.Nm pthread_sigmask
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.Nd examine and/or change a thread's signal mask
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.Sh LIBRARY
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.Lb libpthread
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.Sh SYNOPSIS
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.\" .In pthread.h
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.In signal.h
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.Ft int
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.Fn pthread_sigmask "int how" "const sigset_t *set" "sigset_t *oset"
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.Sh DESCRIPTION
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The
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.Fn pthread_sigmask
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function examines and/or changes the calling thread's signal mask.
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.Pp
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If
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.Fa set
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is not
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.Dv NULL ,
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it specifies a set of signals to be modified, and
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.Fa how
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specifies what to set the signal mask to:
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.Bl -tag -width SIG_UNBLOCK
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.It Dv SIG_BLOCK
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Union of the current mask and
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.Fa set .
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.It Dv SIG_UNBLOCK
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Intersection of the current mask and the complement of
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.Fa set .
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.It Dv SIG_SETMASK
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.Fa set .
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.El
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.Pp
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If
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.Fa oset
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is not NULL, the previous signal mask is stored in the location pointed to by
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.Fa oset .
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.Pp
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.Dv SIGKILL
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and
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.Dv SIGSTOP
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cannot be blocked, and will be silently ignored if included in the signal mask.
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.Sh RETURN VALUES
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If successful,
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.Fn pthread_sigmask
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returns 0.
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Otherwise, an error is returned.
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.Sh ERRORS
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.Fn pthread_sigmask
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shall fail if:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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.Fa how
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is not one of the defined values.
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.El
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.Sh SEE ALSO
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.Xr sigaction 2 ,
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.Xr sigpending 2 ,
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.Xr sigprocmask 2 ,
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.Xr sigsuspend 2 ,
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.Xr sigsetops 3
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.Sh STANDARDS
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.Fn pthread_sigmask
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conforms to
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.St -p1003.1-96
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