Feature Request Tracker item #3477059, was opened at 2012-01-21 09:39
Message generated for change (Tracker Item Submitted) made by mfisk
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Category: FLTK viewer
Group: trunk
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Mike Fisk (mfisk)
Assigned to: Pierre Ossman (ossman_)
Summary: Add -stdio option to vncviewer
Initial Comment:
The request is for a -stdio option that would cause vncviewer to communicate
the RFB protocol over stdin and stdout rather than a TCP connection.
We use a plan-9-style stdio method for connecting to vnc servers over ssh (not
ssh port forwarding, just stdio). This method uses two scripts (sshvnc and
getvncserver) where sshvnc is run on the client launches a vncviewer and
connects it to the stdio of an ssh to the server host where getvncserver is
run. To improve efficiency and simplify the sshvnc script, I would like a
-stdio command line option to the viewer so that one can do the following:
ssh remotehost getvncserver -args <> vncviewer -stdio (using bash syntax)
I have previously been using the -listen option to vncviewer, but that doesn't
work in the new viewer or recent servers (separate bugs are filed for those
issues). However allocating an ephemeral port to redirect between the ssh and
a vncviewer leads to race conditions and unnecessary resource utilization, so
the stdio method would be preferable anyway.
We support multi-user servers and these stdio methods are much cleaner and more
secure than allocating per-user or ephemeral port listeners and tunneling
to/from them. We use ssh since it supports a variety of authentication
mechanisms without requiring changes to the VNC protocol or implementations.
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