.\"	$NetBSD: sigrelse.3,v 1.4 2010/04/30 04:39:16 jruoho Exp $
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.\" by Klaus Klein.
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.Dd April 30, 2010
.Dt SIGRELSE 3
.Os
.Sh NAME
.Nm sigrelse
.Nd manipulate current signal mask
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In signal.h
.Ft int
.Fn sigrelse "int sig"
.Sh DESCRIPTION
.Bf -symbolic
This interface is made obsolete by
.Xr sigprocmask 2 .
.Ef
.Pp
The
.Fn sigrelse
function removes the signal
.Fa sig
from the calling process' signal mask.
.Sh RETURN VALUES
If successful, the
.Fn sigrelse
function returns 0.
Otherwise \-1 is returned and
.Va errno
is set to indicate the error.
.Sh ERRORS
The
.Fn sigrelse
function will fail if:
.Bl -tag -width Er
.It Bq Er EINVAL
The argument
.Fa sig
is not a valid signal number.
.El
.Sh SEE ALSO
.Xr sigprocmask 2 ,
.Xr sighold 3
.Sh STANDARDS
The
.Fn sigrelse
function conforms to
.St -p1003.1-2001 .
It was however marked as obsolete in the
.St -p1003.1-2008
revision of the standard.