Files created by CUPS in "/tmp" aren't actually created in /tmp in RHEL 7

Solution Verified - Updated -

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.

  • Our print programs are not able to write out to /tmp. We upgraded the system from RHEL 5 to RHEL 7. The same commands that work on RHEL 5 to generate output in /tmp no longer work in RHEL 7.

Environment

  • Red Hat Enterprise Linux (RHEL) 7
  • Common Unix Printing System (CUPS) 1.6.3

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