freebsd-dev/sbin/ggate/ggatel/ggatel.8

.\" Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org>
.\" 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.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS 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 AUTHORS 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.
.\"
.\" $FreeBSD$
.\"
.Dd April 2, 2011
.Dt GGATEL 8
.Os
.Sh NAME
.Nm ggatel
.Nd "GEOM Gate local control utility"
.Sh SYNOPSIS
.Nm
.Cm create
.Op Fl v
.Op Fl o Cm ro | wo | rw
.Op Fl s Ar sectorsize
.Op Fl t Ar timeout
.Op Fl u Ar unit
.Ar path
.Nm
.Cm attach
.Op Fl v
.Op Fl o Cm ro | wo | rw
.Fl u Ar unit
.Ar path
.Nm
.Cm destroy
.Op Fl f
.Fl u Ar unit
.Nm
.Cm list
.Op Fl v
.Op Fl u Ar unit
.Sh DESCRIPTION
The
.Nm
utility is a local GEOM Gate class consumer.
It can be used as a replacement for
.Xr md 4
devices or as a
.Dq GEOMificator
for non GEOM-aware devices, but it was mainly created as an example
on how to use and how to communicate with the GEOM Gate kernel module.
.Pp
Available commands:
.Bl -tag -width ".Cm destroy"
.It Cm create
Create a
.Nm ggate
provider related to the given regular file or device.
.It Cm attach
Attach a worker process to an existing
.Nm ggate
provider.
.It Cm destroy
Destroy the given
.Nm ggate
provider.
.It Cm list
List
.Nm ggate
providers.
.El
.Pp
Available options:
.Bl -tag -width ".Fl s Cm ro | wo | rw"
.It Fl f
Forcibly destroy
.Nm ggate
provider (cancels all pending requests).
.It Fl o Cm ro | wo | rw
Specify permission to use when opening the file or device: read-only
.Pq Cm ro ,
write-only
.Pq Cm wo ,
or read-write
.Pq Cm rw .
Default is
.Cm rw .
.It Fl s Ar sectorsize
Sector size for
.Nm ggate
provider.
If not specified, it is taken from device, or set to 512 bytes for files.
.It Fl t Ar timeout
Number of seconds to wait before an I/O request will be canceled.
0 means no timeout.
Default is 30.
.It Fl u Ar unit
Unit number to use.
.It Fl v
Do not fork, run in foreground and print debug informations on standard
output.
.It Ar path
Path to a regular file or device.
.El
.Sh EXIT STATUS
Exit status is 0 on success, or 1 if the command fails.
To get details about the failure,
.Nm
should be called with the
.Fl v
option.
.Sh EXAMPLES
.Dq GEOMify
the
.Dq Li fd0
device and use
.Xr gbde 8
to encrypt data on a floppy.
.Bd -literal -offset indent
ggatel create -u 5 /dev/fd0
gbde init /dev/ggate5
gbde attach ggate5
newfs /dev/ggate5.bde
mount /dev/ggate5.bde /secret
cp /private/foo /secret/
umount /secret
gbde detach ggate5
ggatel destroy -u 5
.Ed
.Sh SEE ALSO
.Xr geom 4 ,
.Xr gbde 8 ,
.Xr ggatec 8 ,
.Xr ggated 8 ,
.Xr mount 8 ,
.Xr newfs 8
.Sh AUTHORS
The
.Nm
utility as well as this manual page was written by
.An Pawel Jakub Dawidek Aq pjd@FreeBSD.org .