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-.\"
-.\" This file and its contents are supplied under the terms of the
-.\" Common Development and Distribution License ("CDDL"), version 1.0.
-.\" You may only use this file in accordance with the terms of version
-.\" 1.0 of the CDDL.
-.\"
-.\" A full copy of the text of the CDDL should have accompanied this
-.\" source.  A copy of the CDDL is also available via the Internet at
-.\" http://www.illumos.org/license/CDDL.
-.\"
-.\"
-.\" Copyright 2015, Joyent, Inc. All rights reserved.
-.\"
-.Dd "Oct 16, 2015"
-.Dt ZFD 7D
-.Os
-.Sh NAME
-.Nm zfd
-.Nd Zone file descriptor driver
-.Sh DESCRIPTION
-The
-.Nm zfd
-character driver exports devices into the zone which can be used by a
-a standalone process within the zone as
-.Vt stdin ,
-.Vt stdout ,
-and
-.Vt stderr .
-The
-.Nm zfd
-driver behaves in a similar manner as the
-.Nm zcons(7D)
-device.
-Inside a zone, the slave side devices appear as
-.Nm /dev/zfd/[0-4] .
-.sp
-The zone's zfd device configuration is driven by
-.Nm zoneadmd
-and a zone attribute
-.Nm zlog-mode
-which is somewhat of a misnomer since its purpose has evolved.
-The attribute can have a variety of values, but the lowest two positions
-in the value string are used to control how many zfd devices are created
-inside the zone and if the primary stream is a tty.
-.sp
-.Dl --
-.Dl -n
-.Dl t-
-.Dl tn
-.sp
-With the
-.Nm t
-flag set,
-.Vt stdin ,
-.Vt stdout ,
-and
-.Vt stderr ,
-are multiplexed onto a single full-duplex stream which is configured as a tty.
-That is,
-.Nm ptem ,
-.Nm ldterm
-and
-.Nm ttycompat
-are autopushed onto the stream when the slave side is opened.
-There is only a single zfd device (0) needed for the primary stream.
-.sp
-When the
-.Nm n
-flag is set, it is assumed that output logging will be done within the zone
-itself.
-In this configuration 1 or 2 additional zfd devices, depending on tty mode
-.Nm ( t
-flag), are created within the zone.
-An application can then configure the zfd streams driver into a multiplexer.
-Output from the stdout/stderr zfd(s) will be teed into the correspond
-logging zfd(s) within the zone.
-.Sh SEE ALSO
-.Xr zlogin 1 ,
-.Xr zoneadmd 1M ,
-.Xr zonecfg 1M ,
-.Xr zcons 7D