[paramiko] Sending stdin to a sshd-spawned process

[Tobias Mueller]

Hi folks :)

I basically want to do the following:

Imagine I have a printer daemon which has an SSH interface. The SSHd 
attaches the "lpr" process right after logging in. That process expects 
the to-be-printed document on stdin and give a status on stdout. So I 
can print with a command like that:

   $ cat doc.ps | ssh printer
   Printed 1 page


I want to replace that with a (paramiko based) python script to do
   $ sshprint doc.ps


(Instead of a printer, you might think of a git-ssh, hg --serve or rsync 
being attached to the ssh session right after authentification. I hope 
my point is clear by now.)



I am, however, not able to do exactly that with paramiko, which might be 
due to my limited SSH knowledge as well.

I tried stdin, stdout, stderr = client.exec_command('') and just write 
to stdin, but stdout is never readable.
I also looked through last years archives and googled for "paramiko 
stdin non-interactive" but I didn't get any useful results.

So if anyone could enlighten me, I'd be glad :)

TIA
   Tobi

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