* How do I set a timeout for `ffap-machine-p'?
@ 2018-10-29 16:33 Daniel King
0 siblings, 0 replies; only message in thread
From: Daniel King @ 2018-10-29 16:33 UTC (permalink / raw)
To: help-gnu-emacs
Hello!
I can rather easily make Emacs unresponsive for tens of seconds. I would like to prevent this behavior. I have isolated the cause of the behavior. I can also reproduce this behavior in vanilla Emacs:
1. start emacs: `emacs --no-init-file'
2. switch to the scratch buffer
3. type `gcr.io' on an empty line
4. move point to the `g' in `gcr.io’
5. execute `M-x find-file-at-point’
The messages buffer shows:
Pinging gcr.io (British Indian Ocean Territory)...
ffap-machine-p: Failed connect: Operation timed out
If I smash C-g several times I can prevent the second message from appearing; however, doing so does not seem to decrease the time I spend waiting. In fact, I would expect C-g to immediately cancel the network operation. I just timed this and I had to wait 80 seconds before Emacs responded to my commands.
Anyway, I’d like to set the timeout for `ffap-machine-p' to 1 second. For now, I’ve disabled this by setting `ffap-machine-p-known' to `'reject'.
I looked around a bit at docs for `open-network-stream', but don’t see anyway to specify a timeout. Moreover, there does not appear to be any way to configure the call within `ffap-machine-p', https://github.com/emacs-mirror/emacs/blob/master/lisp/ffap.el#L460 <https://github.com/emacs-mirror/emacs/blob/master/lisp/ffap.el#L460>.
Thanks!
--
Dan
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2018-10-29 16:33 How do I set a timeout for `ffap-machine-p'? Daniel King
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