James Rich wrote:
The problems I see with this are:

1. What happens if the file is deleted between print jobs?
2. What security implications are there? Specifically, how do we avoid creating a file that someone has cleverly linked to an important system file, ownerships, etc.

By that logic, nobody should ever use files for any reason.

What happens if someone deletes ANY file on your system? Wouldn't that cause a problem? Surely users know better than to delete random files. Those that don't shouldn't be given access to important files -- including the stuff that lp5250d saves.

How do you prevent lp5250d from overwriting an important system file thanks to some clever link? Well... uhh... you don't run lp5250d as root, do you?

I suppose if you're really worried about it, only have lp5250d open a file if it doesn't exist. That way, you know it can't be pointing to a system file -- since system files already exist :) Have it use the file to remember the settings while lp5250d is active, and when lp5250d ends, have it delete the file. This will also serve to protect you from having multiple lp5250d jobs trying to use the same file (which probably wouldn't be good.)

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