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.\" $OpenBSD: portmap.8,v 1.10 2019/03/03 16:06:16 deraadt Exp $
.\"
.\" Copyright (c) 1987 Sun Microsystems
.\" Copyright (c) 1990, 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. 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: @(#)portmap.8 5.3 (Berkeley) 3/16/91
.\"
.Dd $Mdocdate: March 3 2019 $
.Dt PORTMAP 8
.Os
.Sh NAME
.Nm portmap
.Nd Internet protocol port to RPC program number mapper
.Sh SYNOPSIS
.Nm portmap
.Op Fl d
.Sh DESCRIPTION
.Nm portmap
is a server that converts RPC program numbers into internet
protocol port numbers.
It must be running in order to make RPC calls.
.Pp
When an RPC server is started, it will tell
.Nm portmap
what port number it is listening to, and what RPC
program numbers it is prepared to serve.
When a client wishes to make an RPC
call to a given program number,
it will first contact
.Nm portmap
on the server machine to determine
the port number where RPC packets should be sent.
.Pp
.Nm portmap
must be started before any RPC servers are invoked.
.Pp
Normally
.Nm portmap
forks and dissociates itself from the terminal
like any other daemon.
.Nm portmap
then logs errors using
.Xr syslog 3 .
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl d
(debug) prevents
.Nm portmap
from running as a daemon,
and causes errors and debugging information
to be printed to the standard error output.
.El
.Sh SEE ALSO
.Xr inetd 8 ,
.Xr rpcinfo 8
.Sh HISTORY
The
.Nm
command appeared in
.Bx 4.3 .
.Sh BUGS
If
.Nm portmap
crashes, all servers must be restarted.
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