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Use
.In header.h
instead of
.Fd #include \*[Lt]header.h\*[Gt]
Much easier to read and write, and supported by groff for ages.
Okayed by ross.

.\"	$NetBSD: sigignore.3,v 1.3 2003/04/16 13:34:39 wiz Exp $
.\"
.\" Copyright (c) 2003 The NetBSD Foundation, Inc.
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.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Klaus Klein.
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.Dd January 16, 2003
.Dt SIGIGNORE 3
.Os
.Sh NAME
.Nm sigignore
.Nd manipulate signal dispositions
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In signal.h
.Ft int
.Fn sigignore "int sig"
.Sh DESCRIPTION
.Bf -symbolic
This interface is made obsolete by
.Xr sigaction 2 .
.Ef
.Pp
The
.Fn sigignore
function sets the disposition of the signal
.Fa sig
to
.Dv SIG_IGN .
.Sh RETURN VALUES
If successful, the
.Fn sigignore
function returns 0.
Otherwise \-1 is returned and
.Va errno
is set to indicate the error.
.Sh ERRORS
The
.Fn sigignore
function will fail if:
.Bl -tag -width Er
.It Bq Er EINVAL
The argument
.Fa sig
is not a valid signal number.
.It Bq Er EINVAL
An attempt is made to ignore a signal that cannot be ignored,
such as
.Dv SIGKILL
or
.Dv SIGSTOP .
.El
.Sh SEE ALSO
.Xr sigaction 2
.Sh STANDARDS
The
.Fn sigignore
function conforms to
.St -p1003.1-2001 .