Channel.request_x11() either doesn't work or needs a good demo about paramiko HOT 5 OPEN

Tried everything mentioned on this thread, but nothing seems to work on macosx big sur (local machine) with python 3.9 and xquartz installed on the macosx. ssh -X on the terminal works without any issue.. Main issue is echo $DISPLAY on macosx returns /tmp/…./org.xquartz:0 which does not work with xlib_connect.get_display(). Then paramiko’s channel.request_x11() fails. Its been a decade, and a workable solution still doesn’t seem to exist. I would truly appreciate if anyone could offer a workable solution/code to this problem. Thanks!

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N.B. above "commit reference" is unfortunately for another repo that got merged into this one. It is 100% unrelated.

Making this ticket the clearinghouse for "wtf X11?". Other instances of people having problems with this:

• http://stackoverflow.com/questions/12354047/x11-forwarding-with-paramiko?rq=1
• http://stackoverflow.com/questions/4448089/paramiko-x11-mode-with-python-programming
• http://www.mail-archive.com/[email protected]/msg00490.html
• http://superuser.com/questions/217420/paramiko-ssh-x-option

Unfortunately I haven't used the X11 bits in Paramiko myself so I have no immediate or obvious fix (and I have other higher priorities re: digging in :(). However I'm more than willing to assist anybody who has a clue, or who can at least be available on eg IRC to help test/debug things on their end.

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I wrote a working example for one of the stackoverflow questions. See http://stackoverflow.com/a/12903844/72911

It still needs some work, for example, I want to make it handle multiple connections. But it is a start....

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As Gary pointed out in the stackoverflow answer, the handler for x11 requests needs to:

• accept the connection
• open a connection to local display.
• add descriptor for both remote end and local display to poll / select() fd list

then while there's data to handle

• forward data back and forth between remote end and local x11 display.

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Thanks @garyvdm & @dnozay! Still don't have time to dig into this in full, but it sounds like the issue is "no concrete example included in the source" -- not "X11 channel support is actually broken." Yes? no?

Gary's link implies "yes", so I'd definitely merge a pull request adding @garyvdm's example as a new file in demos/, with the notes inlined as comments or as docstrings (module-level or otherwise).

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