GNU bug report logs - #23808
Emacs 25 open-network-stream, make-network-process

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Paul Eggert <eggert <at> cs.ucla.edu>
Subject: bug#23808: closed (Re: bug#23808: Emacs 25 open-network-stream,
 make-network-process)
Date: Thu, 11 Aug 2016 18:27:02 +0000

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Your bug report

#23808: Emacs 25 open-network-stream, make-network-process

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 23808 <at> debbugs.gnu.org.

-- 
23808: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=23808
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 23808-done <at> debbugs.gnu.org
Subject: Re: bug#23808: Emacs 25 open-network-stream, make-network-process
Date: Thu, 11 Aug 2016 11:26:44 -0700

Lars Ingebrigtsen wrote:

> Seems like the right fix to me, I think?

Thanks for looking at it. I installed it and am closing this bug report.

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: bug-gnu-emacs <at> gnu.org
Subject: Emacs 25 open-network-stream, make-network-process
Date: Mon, 20 Jun 2016 12:08:35 +0200

[I'm passing this along from a correspondent who wishes to remain 
anonymous.]

Hello, the recent changes to make-network-process (between jan and the
end of april) may have introduced some problems, (I think they may
still be current, apologies otherwise)

I. misreporting the status of a failed network connection: when
open-network-stream is interrupted after `SYN_SENT': For example:

1. $ iptables -A OUTPUT -p tcp --dport 6697 -j DROP -d 127.0.0.1
2. $ nc -v localhost 6697 #;hangs
3. (open-network-stream "test-proc" "test-buffer" "127.0.0.1" 6697) ; ^G
4. (list-processes)
5. (process-status "test-proc") ; open
6. (process-send-string "test-proc" "foo") ; error fd closed
7. (delete-process "test-proc")

For testing on linux, step 1 makes connections to localhost:6697 hang,
step 2 verifies this using `netcat'. interrupt step 3 with a ^G, step
4 lists a spurious "test-proc" which should not exist, and step 5
reports its state as 'open, while step 6 confirms the fd is closed.

II. spurious "server-client-test" processes with
1. emacs --daemon -Q
2. emacsclient -t
3. list-processes

AFAICT from server.el these processes should not exist. Sometimes I've
seen half a dozen of these "server-client-test" processes when the
daemon was slow to start up with multiple clients connecting.

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