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-.\" Copyright (C) 2000 Jason Evans <jasone@FreeBSD.org>.
-.\" All rights reserved.
-.\"
-.\" 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(s), this list of conditions and the following disclaimer as
-.\" the first lines of this file unmodified other than the possible
-.\" addition of one or more copyright notices.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\" notice(s), 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 COPYRIGHT HOLDER(S) ``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 COPYRIGHT HOLDER(S) 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.
-.\"
-.\" $FreeBSD$
-.Dd April 27, 2000
-.Dt PTHREAD_SIGMASK 3
-.Os
-.Sh NAME
-.Nm pthread_sigmask
-.Nd examine and/or change a thread's signal mask
-.Sh LIBRARY
-.Lb libpthread
-.Sh SYNOPSIS
-.In pthread.h
-.In signal.h
-.Ft int
-.Fn pthread_sigmask "int how" "const sigset_t *set" "sigset_t *oset"
-.Sh DESCRIPTION
-The
-.Fn pthread_sigmask
-function examines and/or changes the calling thread's signal mask.
-.Pp
-If
-.Fa set
-is not
-.Dv NULL ,
-it specifies a set of signals to be modified, and
-.Fa how
-specifies what to set the signal mask to:
-.Bl -tag -width SIG_UNBLOCK
-.It Dv SIG_BLOCK
-Union of the current mask and
-.Fa set .
-.It Dv SIG_UNBLOCK
-Intersection of the current mask and the complement of
-.Fa set .
-.It Dv SIG_SETMASK
-.Fa set .
-.El
-.Pp
-If
-.Fa oset
-is not NULL, the previous signal mask is stored in the location pointed to by
-.Fa oset .
-.Pp
-.Dv SIGKILL
-and
-.Dv SIGSTOP
-cannot be blocked, and will be silently ignored if included in the signal mask.
-.Sh RETURN VALUES
-If successful,
-.Fn pthread_sigmask
-returns 0.
-Otherwise, an error is returned.
-.Sh ERRORS
-The
-.Fn pthread_sigmask
-function will fail if:
-.Bl -tag -width Er
-.It Bq Er EINVAL
-.Fa how
-is not one of the defined values.
-.El
-.Sh SEE ALSO
-.Xr sigaction 2 ,
-.Xr sigpending 2 ,
-.Xr sigprocmask 2 ,
-.Xr sigsuspend 2 ,
-.Xr sigsetops 3
-.Sh STANDARDS
-The
-.Fn pthread_sigmask
-function conforms to
-.St -p1003.1-96
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