Re: [VirtualGL-Users] vncconnect return status

[DRC <dco...@us...>]

There's really no advantage to having it be asynchronous, and since 
TigerVNC, RealVNC, and others have adopted the synchronous approach, it 
makes sense for us to do likewise.


On 5/10/13 3:18 PM, Kevin Van Workum wrote:
> I would find that helpful. Currently I'm forced to scan the log file to
> determine success of the connection on the server side. Maybe you could
> keep the asynchronous behavior default and just add a -sync option to
> request a synchronous connect instead? Either way.
>
>
> On Fri, May 10, 2013 at 4:05 PM, DRC <dco...@us...
> <mailto:dco...@us...>> wrote:
>
>     As currently implemented, vncconnect stores the connection info in an X
>     atom, and Xvnc reads this property asynchronously and establishes the
>     connection.  The connection attempt may or may not have been made by the
>     time vncconnect exits, and thus, only Xvnc has any way of knowing
>     whether or not the connection has failed.
>
>     However, it would be straightforward enough for us to adopt the same
>     system used by TigerVNC/RealVNC.  Their system uses a VNC X11 extension
>     with a method called XvncExtConnect() that can be used to synchronously
>     connect or disconnect a specific client, and it returns an error if the
>     connection fails.  We already have the VNC X11 extension, but currently
>     only the clipboard functions are implemented in it, so it would be a
>     simple matter of adding the connection functions and modifying
>     vncconnect to use them.
>
>
>     On 5/10/13 2:40 PM, Kevin Van Workum wrote:
>     > I noticed that vncconnect's exit status is true if it can connect to the
>     > vncserver even though the connection to the viewer could not made. The
>     > server knows that the connection to the viewer was not established as
>     > evidenced by the "connection failed: Connection refused" message in its
>     > log file. Is there any way to include this information in vncconnect's
>     > return status? Maybe a different return status for vncconnect? Or just
>     > print something to stderr?
>
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> Kevin Van Workum, PhD
> Sabalcore Computing Inc.
> "Where Data Becomes Discovery"
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> "Graph Databases" is the definitive new guide to graph databases and
> their applications. This 200-page book is written by three acclaimed
> leaders in the field. The early access version is available now.
> Download your free book today! http://p.sf.net/sfu/neotech_d2d_may
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