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Date: Thu, 5 Jan 2006 17:32:17 -0500 (EST)
From: Igor Peshansky <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: lin q <linq936 AT hotmail DOT com>
cc: cygwin AT cygwin DOT com
Subject: Re: Help : can not get cron work
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On Thu, 5 Jan 2006, lin q wrote:

> > From: Igor Peshansky <pechtcha AT XX DOT XXX DOT XXX>
> > Reply-To: cygwin AT XXXXXX DOT XXX
> > To: lin q <linq936 AT XXXXXXX DOT XXX>
> > CC: cygwin AT XXXXXX DOT XXX

Again, <http://cygwin.com/acronyms/#PCYMTNQREAIYR>.  Thanks.

> > Subject: Re: Help : can not get cron work
> > Date: Thu, 5 Jan 2006 14:23:06 -0500 (EST)
> >
> > On Thu, 5 Jan 2006, lin q wrote:
> >
> > > > From: Brian Dessent <brian AT XXXXXXX DOT XXX>
> > > > Reply-To: cygwin AT XXXXXX DOT XXX
> > > > To: cygwin AT XXXXXX DOT XXX
> >
> > <http://cygwin.com/acronyms/#PCYMTNQREAIYR>.  Thanks.
> >
> > > > Subject: Re: Help : can not get cron work
> > > > Date: Wed, 04 Jan 2006 18:00:46 -0800
> > > >
> > > > lin q wrote:
> > > >
> > > > >   1) "cygrunsrv -I cron -p /usr/sbin/cron -a –D"
> > > >
> > > > You should run /usr/bin/cron-config, and not try to do this by hand
> > > > because there is much more to do than just installing the service.
> > > >
> > > > >             16 10 * * * linq  rsync -azv emperor:/dev/tools/* /cygdrive/c/bin/tools
> > > >
> > > > That is not the proper format of a user's crontab line.  There is no
> > > > such "username" field as the fifth field in a user's crontab, it
> > > > should just be "16 10 * * * rsync ...".  It was trying to execute a
> > > > command named "linq" that does not exist, and there should be errors
> > > > to this effect in the Windows Event Log.  See "man 5 crontab".
> >
> > Yep, I missed that...
> >
> > > > Also realize that if you do not have system-wise mounts and Cygwin in
> > > > the PATH the above will not work.  This would have been evident if you
> > > > attached the cygcheck output as requested in
> > > > <http://cygwin.com/problems.html>.
> > >
> > > OK, I re-installed cron using /usr/bin/cron-config and I corrected
> > > crontab by removing that "linq".
> > >
> > > It still does not work.
> > >
> > > I tried a Hello Wold test with the following crontab line,
> > >
> > > * * * * * /bin/date > /tmp/date.out 2>&1
> > >
> > > It works fine.
> >
> > Good.
> >
> > > Now I come to suspect something of Cygwin setup. But I can not see
> > > anything wrong in log file of cygcheck. I attach the file.
> > >
> > > One thing to note, when I run cygcheck, it exits with an error,
> > > > cygcheck -svr > /tmp/cygcheck.log
> > > cygcheck: dump_sysinfo: GetVolumeInformation() failed: 1231
> > >
> > > Is this a problem?
> >
> > Nope.  Error 1231 means "The network location cannot be reached.".  Must
> > be a network drive.
> >
> > > Another thing, I checked the Windows event loger and I see some
> > > "Information" on crontab, here is the dump out:
> > >
> > > The description for Event ID ( 0 ) in Source ( /usr/sbin/cron ) cannot
> > > be found. The local computer may not have the necessary registry
> > > information or message DLL files to display messages from a remote
> > > computer. You may be able to use the /AUXSOURCE= flag to retrieve this
> > > description; see Help and Support for details. The following information
> > > is part of the event:
> >
> > This is just junk that the Event Viewer adds when it doesn't know how to
> > parse the event data.  You can safely ignore it.
> >
> > > /usr/sbin/cron : PID 6064 : (linq) CMD (rsync -azv
> > > emperor:/dev/swtools/* /cygdrive/c/bin/swtools).
> >
> > And this is just cron informing you exactly which job it was trying to
> > run.
> >
> > > Do you understand what it is about?
> >
> > Looking at the cron job, there could be a few possibilities for failure:
> > cron doesn't find rsync; the wildcard gets expanded too early; rsync has
> > output that cron doesn't know where to send because you don't have an smtp
> > daemon running...  At least your mounts look ok.  Try eliminating the
> > possibilities above by fixing your cron job...
>
> Thanks.
>
> I did some correction, now here is my crontab:
>
> > crontab -l
> # DO NOT EDIT THIS FILE - edit the master and reinstall.
> # (/tmp/crontab.4232 installed on Thu Jan  5 15:02:10 2006)
> # (Cron version -- $Id: crontab.c,v 1.8 2004/12/21 16:14:41 corinna Exp $)
> * * * * * /usr/bin/rsync -azv emperor:/devl/swtools c:/bin/swtools
>
> Again I tested that the command, "/usr/bin/rsync -azv
> emperor:/devl/swtools c:/bin/swtools" works fine if I type it on shell.

Does it work from a SYSTEM-owned shell (search the archives for
"sysbash")?

> I still can not make it work.
>
> The last suggestion you give is about smtp daemon, I do not quite
> understand.  Could you elabrate on that?

Whenever a cron job writes anything to stdout/stderr, cron tries to email
the output to the user whose crontab it's running.  If you don't have an
smtp daemon running, the cron job will fail (IIRC).  Try redirecting the
output to a file in a known location.  You can also try starting an smtp
daemon (there are a couple in Cygwin, AFAIR), but redirection is so much
easier.

> One last thing, /var/log/cron.log only says "[628] cron started". I
> wonder where I can get more data on how on the earch the command is run.

You can run syslogd, IIRC, to get the syslog events written to a file
instead of the Windows Event Log.
	Igor
-- 
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