dovecot - Dec 2004 - Cygwin and index code

As I can currently only work with windows (eek) I thought I'd try 
dovecot there. I already sent a patch to make dovecot compile under 
cygwin, but it still doesn't really work, here's part of a session that 
I started while my maildir was totally empty (only cur/new/tmp in ~/Maildir)

$ ./imap.exe
* PREAUTH [CAPABILITY IMAP4rev1 SORT THREAD=REFERENCES MULTIAPPEND 
UNSELECT LITERAL+ IDLE CHILDREN NAMESPACE LOGIN-REFERRALS] Logged in as 
jmberg
A01 SELECT INBOX
imap(jmberg): Warning: Compressing cache file 
/home/jmberg/Maildir/dovecot.index.cache
imap(jmberg): Error: open() failed with file 
/home/jmberg/Maildir/dovecot.index.tmp: Permission denied
A01 NO Internal error occured. Refer to server log for more information. 
[2004-12-17 15:51:06]
A02 LOGOUT
* BYE Logging out
A02 OK Logout completed.

A second session (some files were created by the first) yields this:

$ ./imap.exe
* PREAUTH [CAPABILITY IMAP4rev1 SORT THREAD=REFERENCES MULTIAPPEND 
UNSELECT LITERAL+ IDLE CHILDREN NAMESPACE LOGIN-REFERRALS] Logged in as 
jmberg
A01 SELECT INBOX
imap(jmberg): Error: open() failed with file 
/home/jmberg/Maildir/dovecot.index.tmp: Permission denied
imap(jmberg): Error: rename(/home/jmberg/Maildir/dovecot.index.tmp, 
/home/jmberg/Maildir/dovecot.index) failed: Permission denied
A01 NO Internal error occured. Refer to server log for more information. 
[2004-12-17 15:52:25]
A02 LOGOUT
* BYE Logging out
A02 OK Logout completed.


I think this is probably due to the indexing code opening the .tmp file 
and then unlinking it and trying to re-create it while the first is 
still open. Or something, I really am not sure.
*Maybe* the index code might be made work if it creates a new temporary 
file-name every time it re-creates the file, but I don't understand the 
code well enough (yet) to give a better analysis of the problem.



However, I do not think that this is really important. I certainly don't 
want to run dovecot on windows (I only saw cygwin compile in the todo 
and since I have a cygwin setup anyway I thought I'd try). The whole 
thing doesn't work anyway:

[after correcting users, making directories, make install...]
$ /usr/local/sbin/dovecot.exe
dovecot: Dec 17 16:03:17 Info: Dovecot v1.0-test58 starting up
dovecot: Dec 17 16:03:18 Error: login: fd_read() failed: Function not 
implemented
dovecot: Dec 17 16:03:18 Error: close(mail client) failed: Bad file 
descriptor
dovecot: Dec 17 16:03:18 Error: Login process died too early - shutting down
dovecot: Dec 17 16:03:18 Error: imap-login: dovecot: Dec 17 16:03:18 
Fatal: setrlimit(RLIMIT_DATA, 32): Invalid argument
dovecot: Dec 17 16:03:18 Error: login: fd_read() failed: Function not 
implemented
dovecot: Dec 17 16:03:18 Error: close(mail client) failed: Bad file 
descriptor
dovecot: Dec 17 16:03:18 Error: imap-login: dovecot: Dec 17 16:03:18 
Fatal: setrlimit(RLIMIT_DATA, 32): Invalid argument
dovecot: Dec 17 16:03:18 Error: login: fd_read() failed: Function not 
implemented
dovecot: Dec 17 16:03:18 Error: close(mail client) failed: Bad file 
descriptor
dovecot: Dec 17 16:03:18 Error: imap-login: dovecot: Dec 17 16:03:18 
Fatal: setrlimit(RLIMIT_DATA, 32): Invalid argument
dovecot: Dec 17 16:03:18 Error: auth(default): dovecot: Dec 17 16:03:18 
Fatal: setrlimit(RLIMIT_DATA, 256): Invalid argument
dovecot: Dec 17 16:03:18 Error: child 2176 (auth) returned error 89
dovecot: Dec 17 16:03:18 Error: child 2192 (login) returned error 89
dovecot: Dec 17 16:03:18 Error: child 2212 (login) returned error 89
dovecot: Dec 17 16:03:18 Error: child 2232 (login) returned error 89


Maybe someone cares. If not, well, I had a less boring train ride ;)

johannes

On Fri, 2004-12-17 at 16:43 +0100, Johannes Berg wrote:
> /home/jmberg/Maildir/dovecot.index.tmp: Permission denied
> imap(jmberg): Error: rename(/home/jmberg/Maildir/dovecot.index.tmp, 
..
> I think this is probably due to the indexing code opening the .tmp file 
> and then unlinking it and trying to re-create it while the first is 
> still open. Or something, I really am not sure.
Yes, that's it.
> *Maybe* the index code might be made work if it creates a new temporary 
> file-name every time it re-creates the file, but I don't understand the
> code well enough (yet) to give a better analysis of the problem.
For dovecot.index.tmp that would work, but then there's also
dovecot.index.log.newlock which works as a lock file, it can't be
renamed. It could probably be fixed just by closing all the fds to the
file before rename().

Anyway both solutions get a bit kludgy. Perhaps I could do them with
some #ifdef CYGWIN, but I don't really want to fix those myself.

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