Issue

• Consider the following two shell commands:

  ls -ls /tmp > /tmp/lperr
  echo 'test er2'  > /home/joe/lperr2
  

  both work in a simple two-line shell script. The first creates a file in /tmp and the second creates one in /home/joe. However, if I put the same two lines into a printer interface script, the line first creates a file in /tmp/system-private-ca1f.......-cups.service-9Uh8JK/tmp and the second one is created in /home/joe as expected. If I just execute the interface script from a command line they both work as expected. But if executed via an lp command the first one does its strange behavior.

• If I configure a print queue with a DeviceURI like file:///tmp/output.txt, the file isn't saved in the /tmp directory.