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-.\" Copyright (c) 1983, 1991, 1993
-.\"	The Regents of the University of California.  All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
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-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. All advertising materials mentioning features or use of this software
-.\"    must display the following acknowledgement:
-.\"	This product includes software developed by the University of
-.\"	California, Berkeley and its contributors.
-.\" 4. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS BE LIABLE
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-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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-.\"
-.\"     @(#)sigsetops.3	8.1 (Berkeley) 6/4/93
-.\" $FreeBSD: src/lib/libc/gen/sigsetops.3,v 1.6 2001/10/01 16:08:51 ru Exp $
-.\"
-.Dd June 4, 1993
-.Dt SIGSETOPS 3
-.Os
-.Sh NAME
-.Nm sigaddset ,
-.Nm sigdelset ,
-.Nm sigemptyset ,
-.Nm sigfillset ,
-.Nm sigismember
-.Nd manipulate signal sets
-.Sh LIBRARY
-.Lb libc
-.Sh SYNOPSIS
-.In signal.h
-.Ft int
-.Fo sigaddset
-.Fa "sigset_t *set"
-.Fa "int signo"
-.Fc
-.Ft int
-.Fo sigdelset
-.Fa "sigset_t *set"
-.Fa "int signo"
-.Fc
-.Ft int
-.Fo sigemptyset
-.Fa "sigset_t *set"
-.Fc
-.Ft int
-.Fo sigfillset
-.Fa "sigset_t *set"
-.Fc
-.Ft int
-.Fo sigismember
-.Fa "const sigset_t *set"
-.Fa "int signo"
-.Fc
-.Sh DESCRIPTION
-These functions manipulate signal sets, stored in a
-.Fa sigset_t .
-Either
-.Fn sigemptyset
-or
-.Fn sigfillset
-must be called for every object of type
-.Fa sigset_t
-before any other use of the object.
-.Pp
-The
-.Fn sigemptyset
-function initializes a signal set to be empty.
-.Pp
-The
-.Fn sigfillset
-function initializes a signal set to contain all signals.
-.Pp
-The
-.Fn sigaddset
-function adds the specified signal
-.Fa signo
-to the signal set.
-.Pp
-The
-.Fn sigdelset
-function deletes the specified signal
-.Fa signo
-from the signal set.
-.Pp
-The
-.Fn sigismember
-function returns whether a specified signal
-.Fa signo
-is contained in the signal set.
-.Pp
-These functions
-are provided as macros in the include file <signal.h>.
-Actual functions are available
-if their names are undefined (with #undef
-.Em name ) .
-.Sh RETURN VALUES
-The
-.Fn sigismember
-function returns 1
-if the signal is a member of the set,
-0 otherwise.
-The other functions return 0.
-.Sh ERRORS
-Currently, no errors are detected.
-.Sh SEE ALSO
-.Xr kill 2 ,
-.Xr sigaction 2 ,
-.Xr sigsuspend 2
-.Sh STANDARDS
-These functions are defined by
-.St -p1003.1-88 .