"at" cannot open .SEQ file

Bug #371536 reported by Alexis Wilke on 2009-05-04
This bug affects 1 person
Affects Status Importance Assigned to Milestone
at (Ubuntu)

Bug Description

Binary package hint: at

When testing the "at" command in a console, I got this after upgrading to Intrepid:

Cannot open lockfile /var/spool/cron/atjobs/.SEQ: Permission denied

The /var/spool/cron permissions are as expected (see /var/lib/dpkg/info/at.postinst for more info).

However, when I checked out the /usr/bin/at command, it was missing the u+s permission. Is that intended? If so, should the .SEQ be g+rw too? At this time it is -rw------- (u+rw only).

By doing this:

chmod u+s /usr/bin/at

it fixed my problem, but it feels wrong if the security could prevent the user setuid...

On the other hand, it was that way in older systems (8.04 still has the u+s flag turned on.)

Thank you.
Alexis Wilke

P.S. There is the version, and also I tried an "apt-get install --reinstall at" to see whether the permissions would be magically fixed and nothing was changed...

||/ Name Version Description
ii at Delayed job execution and batch processing

Alexis Wilke (alexis-m2osw) wrote :

Just to mention, I'm not on 10.04 and the at command has the setuid flag set:

ls -l /usr/bin/at
-rwsr-sr-x 1 daemon daemon 52112 2010-03-04 18:42 /usr/bin/at

Thank you.

Alexis Wilke (alexis-m2osw) wrote :

Sorry, "not" => "now" -- I've got a problem with that word, obviously!

Jorrit Kronjee (jorrit-wafel) wrote :

Fixed in 10.04.

Changed in at (Ubuntu):
status: New → Invalid
suntania (ozerki) wrote :

also in Debian: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=337132

solution: fix permissions: sudo chown daemon:daemon /var/spool/cron/atjobs/.SEQ

Changed in at (Ubuntu):
status: Invalid → New
Dave Gilbert (ubuntu-treblig) wrote :

Not sure when it was fixed, but looks OK in Quantal (that bug is still open in Debian, but that can be followed in their tracker).

$ ls -l /usr/bin/at
-rwsr-sr-x 1 daemon daemon 55480 Jun 11 10:03 /usr/bin/at

ii at 3.1.13-2ubuntu amd64 Delayed job execution and batch processing

Changed in at (Ubuntu):
status: New → Invalid
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