Re: (machine-instance) possibly blocking execution

Thank you, I got understanding.

On Tue, Jan 03, 2017 at 10:34:26AM -0500, Sam Steingold wrote:
> > * Jean Louis <[email protected]> [2017-01-02 09:46:39 +0300]:
> >
> > I have noticed that (machine-instance) on a computer without Internet
> > connection, or where Internet was enabled, but on the router the
> > forwarding was disabled, was blocking the execution of the command,
> > possibly indefinitely. It was just waiting.
> >
> > When Internet on the routing computer was enabled for the internal
> > computer, the command could run properly.
> >
> > I guess that it is using DNS in background, but I cannot know it.
> 
> Indeed machine-instance calls gethostbyname() on the first invocation.
> 
> I don't think this is wrong: gethostbyname() taking non-trivial time
> is a sign of a system problem: either mis-configuration or an temporary
> connection problem.
> 
> You can disable this feature by editing socket.d:machine_instance:
> 
> --8<---------------cut here---------------start------------->8---
> diff -r 3e5919c338db src/socket.d
> --- a/src/socket.d	Fri Nov 11 18:19:42 2016 +0100
> +++ b/src/socket.d	Tue Jan 03 10:33:06 2017 -0500
> @@ -131,7 +131,7 @@ LISPFUNN(machine_instance,0)
>      var char host[MAXHOSTNAMELEN+1];
>      get_hostname(host);
>      result = asciz_to_string(host,O(misc_encoding)); /* hostname as result */
> -   #ifdef HAVE_GETHOSTBYNAME
> +   #ifdef HAVE_GETHOSTBYNAME_DISABLE
>      pushSTACK(result); /* hostname as 1st string */
>      {
>        var uintC stringcount = 1;
> --8<---------------cut here---------------end--------------->8---
> 
> 
> -- 
> Sam Steingold (http://sds.podval.org/) on darwin Ns 10.3.1504
> http://steingoldpsychology.com http://www.childpsy.net
> https://jihadwatch.org http://camera.org http://americancensorship.org
> Binaries die but source code lives forever.

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