[erlang-questions] is inet:gethostbyname( IP ) correct?

Raimo Niskanen <>
Tue Oct 20 10:09:06 CEST 2009


Try searching from C:/WINDOWS. It may be under
C:/WINDOWS/System32 or hide under C:/WINDOWS/WinSxS/*/
somewhere.

It may also be so that the installer thought it did not
need to install msvcr80.dll, and is wrong about that.
Try re-installing Erlang and select the checkbox
about installing Microsoft Runtime. That way it is
certain Erlang uses the distributed runtime library.

On Mon, Oct 19, 2009 at 11:53:07PM +0200, info wrote:
> And what about msvcr80.dll which is missing in my server ?
> 
> On Sat, Oct 17, 2009 at 12:46:50AM +0100, info wrote:
> > On Fri, Oct 16, 2009 at 04:29:20PM +0200, info wrote:
> > I guess Robby wrote:
> >  > On Thu, Oct 15, 2009 at 4:28 PM, Raimo Niskanen    <
> >  >    <raimo%   >
> >  >   > wrote:
> >  > 
> >  >   > On Thu, Oct 15, 2009 at 03:02:40PM +0200, info wrote:
> >  >   >    > Dear Raimo,
> >  >   >    > I can resume: I discovered that gethostbyname call inet_gethost.c
> >  >   >    > I don't understand inet_gethost.c :-(
> >  >   >    > Where "goes" this problem for finding the information ?
> >  >   >    > If we know where and what, we could perhaps find what is missing in my
> >  >   > windows 2003 ...
> >  >   >    > Hope to read you soon !
> >  >   >    > John
> >  >   >
> >  >   > Well, there is not much more to say. inet_gethost.c calls
> >  >   > struct hostent *gethostbyname(const char *name) in the
> >  >   > winsock2 library:
> >  >   >  http://msdn.microsoft.com/en-us/library/ms738524(VS.85).aspx   <http://msdn.microsoft.com/en-us/library/ms738524%28VS.85%29.aspx   >
> >  >   > It never returns.
> >  >   > It is deprecated but that does not mean broken.
> >  >   > I have a Windows 2003 server that it works on.
> >  >   > We have not found the reason it differs between
> >  >   > my server and your server.
> >  >   > And that is about it.
> >  >   >
> >  >   >
> >  >   >
> >  > I can consistently reproduce the hanging gethostbyname() in inet_gethost.exe
> >  > on Windows 2003 when I have the 'Microsoft Firewall Client for ISA Server
> >  > Version 4.0' installed. This is a specific add-on, nothing to do with
> >  > Microsoft Firewall in your Network Properties.
> >  > 
> > 
> > I guess info wrote:
> >  > but I don't use ISA server !!!
> >  > 
> > 
> > No other interesting firewall software?
> > Yes: I am using Comodo.
> 
> Can you try to uninstall Comodo and see if the problem disappears.
> If so we know where to look for the problem.
> (We have installed a 2003 server with Comodo and got no problems,
>  other than the possibility to do configuration errors that
>  would cause your symptoms)
> 
> > 
> > I guess Robby wrote:
> >  > If I remove it, it works fine, if I add it it hangs. Apart from that the
> >  > W2003 build is as vanilla as it gets.
> >  > 
> >  > Nothing much to go on, but I would not be surprised if some system DLL is
> >  > getting in the way. This is very hard to diagnose.
> >  > 
> >  > One day I'll get around to compiling inet_gethost.exe in my setup, just to
> >  > rule out poor linkage due to the VC++ setup used to build the shipping
> >  > executables. If I compile up a trivial gethostbyname() example from MSDN, it
> >  > works OK in all circumstances.
> >  > 
> >  > There are a few strange dependencies in other shipped Windows files, for
> >  > example beam.dll seems to depend on a particular MSVCR80.DLL with the
> >  > version 8.0.50727.1433 . And if you have an older Windows machine, you get
> >  > the completely unhelpful popup box telling you that your program could not
> >  > be run. This has something to do with Windows Side-by-Side DLL deployment,
> >  > and I completely fail to grasp what that's all about.
> >  > 
> > 
> > I guess info wrote:
> >  > but I don't have msvcr80.dll !!!
> > 
> > I guess you do, actually, since Erlang/OTP's installer is supposed
> > to install that DLL, if it does not exist already.
> > 
> > I guess Robby wrote:
> >  > 
> >  > Robby
> > 
> > -- 
> > 
> > / Raimo Niskanen, Erlang/OTP, Ericsson AB
> 
> -- 
> 
> / Raimo Niskanen, Erlang/OTP, Ericsson AB

-- 

/ Raimo Niskanen, Erlang/OTP, Ericsson AB


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