minix/lib/libc/gen/sigrelse.3

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.\" $NetBSD: sigrelse.3,v 1.4 2010/04/30 04:39:16 jruoho Exp $
.\"
.\" Copyright (c) 2003 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Klaus Klein.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
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.\" 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
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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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.