More exim, and fcntl lock problems

[Pierre A. Humblet]

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
-------------- next part --------------
A non-text attachment was scrubbed...
Name: try.c
Type: application/x-unknown-content-type-c_auto_file
Size: 964 bytes
Desc: not available
URL: <http://cygwin.com/pipermail/cygwin/attachments/20011120/a200c139/attachment.bin>
-------------- next part --------------
--
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/