1 files changed, 83 insertions, 0 deletions
diff --git a/lib/libc/compat-43/sigsetmask.3 b/lib/libc/compat-43/sigsetmask.3
new file mode 100644
index 00000000000..267e47db972
--- /dev/null
+++ b/lib/libc/compat-43/sigsetmask.3
@@ -0,0 +1,83 @@
+.\" Copyright (c) 1983, 1991 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:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    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
+.\" 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.
+.\"
+.\"     from: @(#)sigsetmask.2	6.7 (Berkeley) 3/10/91
+.\"	$Id: sigsetmask.3,v 1.1 1995/10/18 08:41:46 deraadt Exp $
+.\"
+.Dd March 10, 1991
+.Dt SIGSETMASK 3
+.Os BSD 4.2
+.Sh NAME
+.Nm sigsetmask
+.Nd set current signal mask
+.Sh SYNOPSIS
+.Fd #include <signal.h>
+.Ft int
+.Fn sigsetmask "int mask"
+.Fn sigmask signum
+.Sh DESCRIPTION
+.Bf -symbolic
+This interface is made obsoleted by:
+.Ef
+.Xr sigprocmask 2 .
+.Pp
+.Fn Sigsetmask
+sets the current signal mask
+Signals are blocked from delivery if the
+corresponding bit in 
+.Fa mask
+is a 1; the macro
+.Fn sigmask
+is provided to construct the mask for a given
+.Fa signum .
+.Pp
+The system
+quietly disallows
+.Dv SIGKILL
+or
+.Dv SIGSTOP
+to be blocked.
+.Sh RETURN VALUES
+The previous set of masked signals is returned.
+.Sh SEE ALSO
+.Xr sigprocmask 2 ,
+.Xr kill 2 ,
+.Xr sigaction 2 ,
+.Xr sigsuspend 2 ,
+.Xr sigvec 3 ,
+.Xr sigblock 2 ,
+.Xr sigsetops 3
+.Sh HISTORY
+The
+.Fn sigsetmask
+function call appeared in
+.Bx 4.2
+and has been deprecated.