Cygwin Cron on Windows 2003 Server Issues
Paul J. Ghosh
p.j.g@softhome.net
Sat Sep 11 01:46:00 GMT 2004
Larry/Igor - well - this is the first time I am participating in the
cygwin mailing list and from what I have read at http://ezmlm.org/ it is
supposed to add to threads if the subject is identical. I have been
using the same subject line. There was not an initial email that I
could have replied to nor was there a References: that I could have
manipulated when I started. I read the responses by going to the site
http://cygwin.com/ml/cygwin/2004-09/ which just lists items
chronologically. But, since it was not available night before last I
discovered the site http://www.mail-archive.com/cygwin@cygwin.com/ that
actually does have all my responses threaded correctly. In fact, the
presentation is prefered since it is by thread/subject as opposed to by
date/time. So, tell me what I am supposed to do such that responses are
correctly threaded and I will comply...
Igor - even though we did not state the command executed to add cron as
a service it did include the -D option as described in the message
http://www.mail-archive.com/cygwin@cygwin.com/msg31538.html. Yes, we
have tried running it as you have described and it still fails with the
error: cron : PID 3784 : starting service `cron' failed: execv: 128,
Transport endpoint is not connected. Also yes, you have correctly
pointed out that the -a is erroneous in my summation of steps. I am
including an updated set of instructions just to ensure that any future
readers will not be mislead.
Pierre - your suggestion - will it not lead to root privileges for
svccron? If yes, then that is not desirable. However, I will try it
out and let all know the outcome. In a bash shell with a simple command
it prompts for a password.
$ su -c "exec echo foobar" system
Password:
su: incorrect password
Thank you all once again. Hopefully one of you can get it to work on
W2K3 without wrappers.
Regards,
Paul J. Ghosh
overview:
- 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/bin/bash
/usr/sbin/cron -D
$ ls -l /usr/sbin/xcron
-rwxr-xr-x 1 devadm Domain U 34 Sep 10 14:03
/usr/sbin/xcron
- create wrapper for crontab - attached 'xcrontab'/contents
below
- install in /usr/bin
- change permissions for xcrontab
$ chmod 744 /usr/bin/xcrontab
$ cat /usr/bin/xcrontab
#!/usr/bin/bash
/usr/bin/crontab $@;
xval=$?;
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
/usr/bin/xcrontab
- add wrapped cron as service
$ cygrunsrv -I xcron -p /usr/sbin/xcron -u svccron -w <passwd>
- execute following as user for which tasks need to be scheduled
$ xcrontab -e
- for details
$ man 5 crontab
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