Many thanks to Peter Teuben, and for finding that the cause of the 'permission denied' actually is the symlink from /usr/share to /home. I can say the symlink also causes cups to fail in Ubuntu 14.04 (Trusty Tahr)
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to cups in Ubuntu. https://bugs.launchpad.net/bugs/1215733 Title: cups config files cannot deal with symlinks and/or other filesystems Status in “cups” package in Ubuntu: Confirmed Bug description: I needed to make space on / to upgrade my ubuntu, and since /usr/share is huge (4GB in my case), decided to clone this on /home/share and let /usr/share -> /home/share. I then found cups failed to work, there were messages such as Unable to open "/usr/share/cups/mime": Permission denied in /var/log/cups/error_log, which eventually gave me the hint what was going on here. Also, looking at properties of a printer, the "print test page" button was greyed out, I could not print a test page. This turned out the easiest way for me to debug this problem (at least graphically). After the fixes (see below) and "service cups restart" I would see the "print test page" button again. To differentiate between a symlink and other-filesystem as the root cause, I decided to experiment: 1) I kept /usr/share.d and did /usr/share -> /usr/share.d This failed, so this pointed to the fact that it's a symlink that was not allowed by CUPS, since /usr/share.d was on / but then it surprised me: 2) I kept /usr/share but now /usr/share/cups -> /usr/share/cups.d worked, despite that it was a symlink. 3) Of course, i confirmed that /usr/share/cups -> /home/cups.d indeed failed. So,other filesystem is always a fail. I'm left with this weird puzzle, why CUPS doesn't quite allow a simple symlink 1) or even 3) It seems this is against the unix philosphy and certainly burnt me and caused me a good fraction of a day of work. This could very well be a problem on apple's as well, but I have no easy access to one to test this. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1215733/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
