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Re: ENOTSOCK errors with cygwin dll 1.3.21 and 1.3.22

Sorry for taking awhile to respond :)

I followed Igor's suggestion and looked at the cygwin-cvs archives and found
which change is affecting me.

It seems that part of the change in:

* (fhandler_socket::dup): On NT systems avoid
	using WinSock2 socket duplication methods.  Add comment.

This is what's causing me grief.

I built the 1.3.22 sources, commenting out the line:
if (! wincap.has_security ())

and my inetd apps work ok again.

I've been searching the web and archives to try and find out what's the
difference between WSADuplicateSocket and DuplicateHandle and I can't really
seem to find anything, other than an MS KB 150523 "BUG: Socket Inheritance
on Different Windows Platforms".  I don't mind investigating further, but I
think I've come to a roadblock....  In the comment with the patch, it says
"Using WinSock2 methods for dup'ing sockets seem to collide with user
context switches under... some... conditions."  Where can I find more
information on this user context collision problem?

I have WinXP Home SP1.


----- Original Message ----- 
From: "Corinna Vinschen" <>
To: <>
Sent: Monday, April 21, 2003 1:20 PM
Subject: Re: ENOTSOCK errors with cygwin dll 1.3.21 and 1.3.22

> On Wed, Apr 16, 2003 at 08:48:37PM -0700, Abraham Backus wrote:
> > Thanks Igor.  I've downloaded the cygwin cvs and am trying to track down
> > what's up in any spare time that I get.  In the meantime though, I've
> > some code from a testcase for one of the patches and made some of my own
> > modifications to run it using inetd.  With 1.3.20, the code is ok.  With
> > 1.3.22 however, the calls to fgets(), fputs(), and fflush() all fail
> > "Socket operation on non-socket" (errno=ENOTSOCK)
> I've tested your below small aplication on XP using all versions from
> 1.3.20 up to current from CVS.  Actually it worked not very well on
> 1.3.20 (the both "yo" replies never made it to the client) while it
> worked nicely on all versions since 1.3.21.
> For the records, I used the following entry in /etc/inetd.conf:
>   uucp    stream  tcp     nowait  root    /home/corinna/socktest socktest
> I used uucp just to have some known service.  Then I connected using
> `telnet localhost uucp'.
> Corinna
> > ----- Original Message -----
> >
> > > Look in winsup/cygwin/ChangeLog between "Bump DLL minor number to 22"
> > > "Bump DLL minor number to 23"...  You could also look in the
> > > list archives between 3/9 and 3/13.
> > >
> > > FWIW, I see the following socket-related changes:
> > > <>
> > > <>
> > > <>

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