.\" Copyright (c) 2004 Pawel Jakub Dawidek .\" 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 October 21, 2020 .Dt GGATESSH 8 .Os .Sh NAME .Nm ggatessh .Nd "GEOM Gate SSH/SFTP client and control utility" .Sh SYNOPSIS .Nm .Cm create .Op Fl v .Op Fl o Cm ro | wo | rw .Op Fl F Ar pidfile .Op Fl i Ar identifyfile .Op Fl l Ar username .Op Fl p Ar port .Op Fl q Ar queue_size .Op Fl s Ar sectorsize .Op Fl r Ar nrequests .Op Fl t Ar timeout .Op Fl u Ar unit .Ar host .Ar path .Nm .Cm rescue .Op Fl v .Op Fl o Cm ro | wo | rw .Op Fl F Ar pidfile .Op Fl i Ar identifyfile .Op Fl l Ar username .Op Fl p Ar port .Op Fl r Ar nrequests .Fl u Ar unit .Ar host .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 network client for the GEOM Gate class. It is responsible for the creation of .Nm ggate devices and forwarding I/O requests between the GEOM Gate kernel subsystem and an .Xr sftp-server 8 over SSH. .Pp Available commands: .Bl -tag -width ".Cm destroy" .It Cm create Connect to an .Xr sftp-server 8 via SSH on the specified host and create a .Nm ggate provider for the specified remote file or device. .It Cm rescue Create a new connection after the .Nm process has died or has been killed. The new connection to the .Xr sftp-server 8 handles pending and future requests. If the remote file has changed in size, the ggate device will be resized to match the new remote size. .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 Ar pidfile Write out the daemon's pid to .Ar pidfile . The default is .Pa /var/run/ggatessh.ggate.pid . .It Fl f Forcibly destroy .Nm ggate provider (cancels all pending requests). .It Fl i Ar identityfile The path to the identity file to use for ssh public key authentication. If the .Ar identityfile is not specified, the default of .Pa $HOME/.ssh/id_rsa will be used. .It Fl l Ar username The user name to authentice to the server with. If .Ar username is not specified, the default will be .Ev $USER . .It Fl o Cm ro | wo | rw Specify permissions 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 p Ar port Port to connect to on the remote host. Default is 22. .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 r Ar nrequests Specifies how many requests may be outstanding at a single time. This determines that maximum number of connections to the .Xr sftp-server 8 that will be established at a time. If unspecified, the default is 32. .It Fl s Ar sectorsize Sector size for .Nm ggate provider. If not specified, it is taken from the 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. Default is 0, which means no timeout. .It Fl u Ar unit Unit number to use. .It Fl v Do not fork, run in foreground and print debug information on standard output. .It Ar host Remote SSH server to connect to. .It Ar path Path to a regular file or device on the remote host. .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 Use a CD-ROM device on a remote host. .Bd -literal -offset indent server# cat /etc/gg.exports client RO /dev/cd0 server# ggated client# ggatec create -o ro server /dev/cd0 ggate0 client# mount_cd9660 /dev/ggate0 /cdrom .Ed .Sh SEE ALSO .Xr geom 4 , .Xr ggatessh 7 , .Xr ggated 8 , .Xr ggatel 8 , .Xr mount_cd9660 8 .Sh HISTORY The .Nm utility appeared in .Fx 5.3 . .Sh AUTHORS The .Nm utility as well as this manual page was written by .An Pawel Jakub Dawidek Aq Mt pjd@FreeBSD.org .