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Re: Cygwin Cron on Windows 2003 Server Issues

Thank you all for your help.  We pursued all that was recommended and
still ran into the error: cron : PID 3784 : starting service `cron'
failed: execv: 128, Transport endpoint is not connected.

Since invoking it command line was successful we put a wrapper in place
that executes cron and added the wrapper as a service.  cron is now
working.  For the issue where crontab assumes that SYSTEM is the owner
of the cron service and leaves the contents of the /var/cron/tabs as 640
with a group of SYSTEM we also created a wrapper that changes the
permission to 644.

Here is the detail of what we have put into place and provided to the
release engineer:

	- create local user called 'svccron'
	- set up permissions for local user
	- create wrappers for cron/crontab
	- add wrapped cron as service
	- set up schedules

execute the following within a bash shell:

	- create local user called 'svccron'

  	net user svccron <passwd> /add /yes
  	net localgroup <administrators_group_name> svccron /add
  	editrights -a SeAssignPrimaryTokenPrivilege -u svccron
 	editrights -a SeCreateTokenPrivilege -u svccron
  	editrights -a SeIncreaseQuotaPrivilege -u svccron
  	editrights -a SeServiceLogonRight -u svccron
  	mkpasswd -l -u svccron >> /etc/passwd

	for security reasons:
  	editrights -a SeDenyInteractiveLogonRight -u svccron
  	editrights -a SeDenyNetworkLogonRight -u svccron
  	editrights -a SeDenyRemoteInteractiveLogonRight -u svccron

	- create wrapper for cron - attached 'xcron'/contents below
	- install in /usr/sbin
	- change permissions for xcron
	$ chmod 744 /usr/sbin/xcron

	$ cat /usr/sbin/xcron
	/usr/sbin/cron -D

	$ ls -l /usr/sbin/xcron
	-rwxr-xr-x    1 devadm   Domain U       34 Sep 10 14:03

	- create wrapper for crontab - attached 'xcrontab'/contents
	- install in /usr/bin
	- change permissions for xcrontab
	$ chmod 744 /usr/bin/xcrontab

	$ cat /usr/bin/xcrontab
	/usr/bin/crontab $@;
	chmod 644 /var/cron/tabs/$USER;
	exit $xval;

	$ ls -l /usr/bin/xcrontab
	-rwxr-xr-x    1 devadm   Domain U       90 Sep 10 13:58

	- add wrapped cron as service
	$ cygrunsrv -I xcron -p /usr/sbin/xcron -a -u svccron -w

	- execute following as user for which tasks need to be scheduled
	$ xcrontab -e

	- for details
	$ man 5 crontab


Paul J. Ghosh

Attachment: xcron
Description: Binary data

Attachment: xcrontab
Description: Binary data

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