Mailing-List:	contact cygwin-help AT sourceware DOT cygnus DOT com; run by ezmlm
List-Subscribe:	<mailto:cygwin-subscribe AT sources DOT redhat DOT com>
List-Archive:	<http://sources.redhat.com/ml/cygwin/>
List-Post:	<mailto:cygwin AT sources DOT redhat DOT com>
List-Help:	<mailto:cygwin-help AT sources DOT redhat DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender:	cygwin-owner AT sources DOT redhat DOT com
Delivered-To:	mailing list cygwin AT sources DOT redhat DOT com
Message-ID:	<3C07F55F.5B2E669D@ieee.org>
Date:	Fri, 30 Nov 2001 16:08:47 -0500
From:	"Pierre A. Humblet" <Pierre DOT Humblet AT ieee DOT org>
X-Mailer:	Mozilla 4.73 [en] (WinNT; U)
X-Accept-Language:	en,pdf
MIME-Version:	1.0
To:	cygwin AT cygwin DOT com
Subject:	More exim, and fcntl lock problems

--------------0F95EA807107958CA729C5D1
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit

Coincidentally with Gerrit Haase in
http://sources.redhat.com/ml/cygwin/2001-11/msg01465.html
last weekend I also got to compile exim (a mail
transfer agent) and qpopper (a pop server).

Both compile fine with relatively minor changes. For 
exim I wrote a routine to discover the local interfaces
and (instead of relying on bind) a simple synchronous stub
resolver (that could perhaps later interface directly to
the native caching resolver in Windows 2000 etc...).
Contrary to Gerrit I didn't need to provide flock().
Exim works somewhat, e.g. it can send mail.

That's where the bad news start, I tried Win98 and NT.
1) Under Win98 I hit issues that were traced to gdbm 
emulation of ndbm on FAT
http://cygwin.com/ml/cygwin/2001-11/msg01793.html
That looks hopeless to me. Please tell me I am wrong!

2) On WinNT, local deliveries fail on line 765 of transport.c
  while ((len = read(deliver_datafile, deliver_in_buffer,
I reproduced the situation in the attached try.c  
A parent process opens and locks a file (using fcntl), 
and then forks a child. It turns out that the child cannot 
read the file. Is it a Cygwin bug (latest everything)?

I also hit a couple of minor issues, e.g. pathnames starting 
with multiple / (fixed in os.c), and the fact that Windows 
pathnames can contain $ (unfortunately my home directory is 
//admin4/phumblet$). Exim tries to expand them, as sh would 
(no fix yet).   

I will gladly send my versions of os.c and os.h to willing
experimenters.

Pierre
--------------0F95EA807107958CA729C5D1
Content-Type: application/x-unknown-content-type-c_auto_file;
 name="try.c"
Content-Transfer-Encoding: base64
Content-Disposition: inline;
 filename="try.c"
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==

--------------0F95EA807107958CA729C5D1
Content-Type: text/plain; charset=us-ascii

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Bug reporting:         http://cygwin.com/bugs.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/
--------------0F95EA807107958CA729C5D1--

- Raw text -