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* How to communicate with a running external process with given PID?
@ 2013-07-20  9:06 Thorsten Jolitz
  2013-07-22 13:02 ` Kevin Rodgers
  0 siblings, 1 reply; 18+ messages in thread
From: Thorsten Jolitz @ 2013-07-20  9:06 UTC (permalink / raw)
  To: help-gnu-emacs


Hi List, 

say I want to call another program (more exactly, another Lisp program
that is not Emacs Lisp) from an Emacs Lisp program. 

My special requirement is that I don't want to start a new Emacs
subprocess, but want to communicate with an existing (running) process.
And there maybe several running instances of this program at the same
time, so I want to communicate with one existing (running) process with
a given PID.

Now there is splendid support in Emacs for communicating with other
programs, but always based on the assumption that Emacs starts and
controls a new subprocess. 

There is chapter 37.12 "Accessing Other Processes" in the Elisp manual,
and I can do successfully 

,-------------------------
| (process-attributes PID)
`-------------------------

to receive a lot of information about the process I want to communicate
with. 

But what then? Where are the (e.g.) `process-send-string' or
`process-send-region' functions for external processes I could use to
communicate with my external program?

I could run a server in the external lisp program and use a
network-connection-object to send http-requests (e.g. with the help of
emacs-request.el) via TCP - but that seems to be total overkill for my
requirements.

I just want to use a running external process with a given PID in a
similar way I would use (a)synchronous processes created from Emacs with
`call-process' or `start-process'. How can I do that?

Maybe there is an obvious answer to this question that I don't see.
Would be nice. 

-- 
cheers,
Thorsten





^ permalink raw reply	[flat|nested] 18+ messages in thread

end of thread, other threads:[~2013-07-23  7:19 UTC | newest]

Thread overview: 18+ messages (download: mbox.gz follow: Atom feed
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     [not found] <mailman.1456.1374311231.12400.help-gnu-emacs@gnu.org>
2013-07-20 10:51 ` How to communicate with a running external process with given PID? Pascal J. Bourguignon
2013-07-22 16:52   ` Rustom Mody
2013-07-22 18:18     ` Pascal J. Bourguignon
2013-07-23  4:44       ` Rustom Mody
2013-07-20 10:52 ` Pascal J. Bourguignon
2013-07-20 11:57   ` Thorsten Jolitz
     [not found]   ` <mailman.1462.1374321447.12400.help-gnu-emacs@gnu.org>
2013-07-20 14:09     ` Pascal J. Bourguignon
2013-07-22  8:06       ` Thorsten Jolitz
2013-07-22  8:22         ` Aurélien Aptel
2013-07-22  9:43           ` Thorsten Jolitz
2013-07-22 14:15             ` Aurélien Aptel
2013-07-23  7:19               ` Thorsten Jolitz
     [not found]           ` <mailman.1547.1374486226.12400.help-gnu-emacs@gnu.org>
2013-07-22 18:14             ` Pascal J. Bourguignon
2013-07-20  9:06 Thorsten Jolitz
2013-07-22 13:02 ` Kevin Rodgers
2013-07-22 14:12   ` Thorsten Jolitz
2013-07-22 14:42     ` Aurélien Aptel
     [not found]     ` <mailman.1562.1374504168.12400.help-gnu-emacs@gnu.org>
2013-07-22 18:16       ` Pascal J. Bourguignon

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