Re: Fix needed for communication with gpg-agent

[storm@cua.dk (Kim F. Storm)]

Sascha Wilde <wilde@sha-bang.de> writes:

> A few more in depth tests[0] tests show, that emacs some how catches
> some of the input, which is meant to go to pinentry:  The pinentry
> curses interface is already shown, when emacs still gets some of the
> key events...

So pinentry CAN read some input ... 

Since this was the main problem which we were concerned with, the
problem is reduced to find a way to block Emacs from reading from the
tty while pinentry needs it.

Here's one way that might work (untested):

Currently, pgg.el uses code like this:

       (while (eq 'run (process-status process))
	 (accept-process-output process 5))

Replacing this with the following would (in principle) prevent Emacs
from reading any input while waiting for the process to terminate.

          (if window-system
             (while (eq 'run (process-status process))
	       (accept-process-output process 5))
             ;; Don't read from tty in case pinentry needs it.
             (accept-process-output process nil nil 1))


But we may also need to define SYNC_INPUT to make this work reliable ??

-- 
Kim F. Storm <storm@cua.dk> http://www.cua.dk