GNU bug report logs - #6781
emacs server with X11 build on OSX

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Message #14 received at 6781 <at> debbugs.gnu.org (full text, mbox):

From: Juanma Barranquero <lekktu <at> gmail.com>
To: Ken Raeburn <raeburn <at> raeburn.org>
Cc: 6781 <at> debbugs.gnu.org, Leo <sdl.web <at> gmail.com>, emacs-devel <at> gnu.org
Subject: Re: emacs server with X11 build on OSX
Date: Tue, 3 Aug 2010 04:47:57 +0200

On Tue, Aug 3, 2010 at 04:12, Ken Raeburn <raeburn <at> raeburn.org> wrote:

> Using ":host 'local" causes the C code to look up the name "localhost",
> which may or may not map to IPv4 and/or IPv6 addresses.  (Almost
> always an IPv4 address of 127.0.0.1; sometimes IPv6 also, and I've
> occasionally seen it mapped to the local ethernet interface's IPv4
> address.)  Not specifying the host at all causes a wildcard address to
> be used, which would be reachable from other hosts, whereas
> 127.0.0.1 generally is not.

[Ah, the wonders of TCP.]

I think you're right, because in Leo's examples it works when he
specifically sets "127.0.0.1", so it's clear that Emacs isn't
selecting that address with "localhost" or 'local. I suppose the Right
Thing to do for server.el is to force it to use "127.0.0.1" instead of
'local for the :host argument.

    Juanma


=== modified file 'lisp/server.el'
--- lisp/server.el	2010-01-13 08:35:10 +0000
+++ lisp/server.el	2010-08-03 02:44:17 +0000
@@ -561,7 +561,7 @@
 		       ;; The other args depend on the kind of socket used.
 		       (if server-use-tcp
-			   (list :family nil
+			   (list :family 'ipv4
 				 :service t
-				 :host (or server-host 'local)
+				 :host (or server-host "127.0.0.1") ;; bug#6781
 				 :plist '(:authenticated nil))
 			 (list :family 'local

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