.\" $OpenBSD: getrtable.2,v 1.5 2023/02/22 06:31:51 guenther Exp $
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.\" Copyright (c) 2009 Reyk Floeter <reyk@openbsd.org>
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.Dd $Mdocdate: February 22 2023 $
.Dt GETRTABLE 2
.Os
.Sh NAME
.Nm getrtable ,
.Nm setrtable
.Nd get or set the default routing table of the current process
.Sh SYNOPSIS
.In sys/types.h
.In sys/socket.h
.Ft int
.Fn getrtable "void"
.Ft int
.Fn setrtable "int rtableid"
.Sh DESCRIPTION
.Fn getrtable
and
.Fn setrtable
manipulate the routing table and routing domain associated with the current
process.
.Pp
Only the superuser is allowed to change the process routing table if
it is already set to a non-zero value.
.Sh RETURN VALUES
.Fn getrtable
returns the routing table of the current process.
Upon successful completion,
.Fn setrtable
returns 0 if the call succeeds, \-1 if it fails.
.Sh ERRORS
The call succeeds unless:
.Bl -tag -width Er
.It Bq Er EINVAL
The value of the
.Fa rtableid
argument is not a valid routing table.
.It Bq Er EPERM
The user is not the superuser and the routing table of the
calling process is already set to a non-zero value.
.El
.Sh SEE ALSO
.Xr getsockopt 2 ,
.Xr route 8
.Sh HISTORY
The
.Fn getrtable
and
.Fn setrtable
system calls appeared in
.Ox 4.8 .