Bug#764253: system-config-printer: Creates millions of ppd symlinks

[Didier 'OdyX' Raboud]

Hi Andreas, and thanks for the detailed analysis,

Le mardi, 21 octobre 2014, 20.09:08 Andreas Cadhalpun a écrit :
> This was caused by the referenced file in /etc/cups/ppd not having
> sufficient permissions.
> Every <printer>.ppd there had '-rw-r----- 1 root lp' permissions, but
> additionally there were also <printer>.ppd.0 files with the correct
> '-rw-r--r-- 1 root root' permissions.
> 
> After making these ppd files world readable again, the problem
> vanished: # chmod -R o+r /etc/cups/ppd
> 
> Suspiciously the creation time of these ppd files coincides with the
> time at which cups was last triggered by a printer driver update.
> 
> Thus I think there are two bugs here:
>   * cups should not create files with wrong permissions in
> /etc/cups/ppd

Upstream seems to think differently; see http://cups.org/str.php?L4500 
and https://bugzilla.redhat.com/show_bug.cgi?id=1150917#c6

I'm therefore planning to add the patch proposed in STR: #4500 to make 
sure symlinks are only returned when they are readable, this should help 
right?

> * scp-dbus-service should not start an infinite loop
> creating millions of symlinks in /tmp just because the permissions in
> /etc/cups/ppd are wrong

This should definitively be fixed in system-config-printer anyway.

Cheers,
OdyX