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

.\" Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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.\" $FreeBSD$
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.Dd April 26, 2004
.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 q Ar queue_size
.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 q Ar queue_size
Number of pending I/O requests that can be queued before they will
start to be canceled.
Default is 1024.
.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 .