From: larsi@ifi.uio.no (Lars Magne Ingebrigtsen)
Subject: Re: Connecting to a newsserver with nntp.
Date: 22 Feb 1996 19:03:29 +0100 [thread overview]
Message-ID: <w8sg2c3i6fi.fsf@aegir.ifi.uio.no> (raw)
In-Reply-To: pp@pfawww.pp.se's message of 22 Feb 1996 08:54:21 +0100
pp@pfawww.pp.se (Per Persson) writes:
> ffap.el which comes with 19.30 does this and has some variables for
> it, it's pretty much spread out so I guess you have to poke around in
> it a little yuorself. :-)
Hmn. Here's the relevant code:
(condition-case error
(progn
(delete-process
(open-network-stream
"ffap-machine-p" nil host (or service "discard")))
t)
(error
(let ((mesg (car (cdr error))))
(cond
;; v18:
((string-match "^Unknown host" mesg) nil)
((string-match "not responding$" mesg) mesg)
((equal mesg "connection failed")
(if (equal (nth 2 error) "permission denied")
nil ; host does not exist
;; Other errors mean host exists:
(nth 2 error)))
;; Could be "Unknown service":
(t (signal (car error) (cdr error)))))))
So it doesn't really ping at all -- it just tries to connect to the
"discard" port on the machine. If that fails, then it assumes the
machine is down.
Anyways, Gnus could do something similar.
--
"Yes. The journey through the human heart
would have to wait until some other time."
next prev parent reply other threads:[~1996-02-22 18:03 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
1996-02-21 18:02 Per Persson
1996-02-21 18:39 ` eichin
1996-02-21 19:51 ` Per Persson
1996-02-21 19:56 ` eichin
1996-02-21 20:19 ` Per Persson
1996-02-22 1:12 ` Lars Magne Ingebrigtsen
1996-02-22 7:54 ` Per Persson
1996-02-22 18:03 ` Lars Magne Ingebrigtsen [this message]
1996-02-21 22:29 ` Greg Stark
1996-02-22 6:01 ` Lars Magne Ingebrigtsen
1996-02-22 23:28 ` Wes Hardaker
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