Eneo

The eneo command takes one filename argument. If the file does not exist, no action is taken. If the file does exist, it is deleted. In both cases success status is returned. However, if the file exists and cannot be deleted, eneo returns severe status.

Syntax  : eneo = "eneo" s filename
Examples: eneo result.out

The eneo command was added so as to allow regression testing scripts to ensure that existing output files were not present before proceeding with a test run. If FunnelWeb were to fail to generate an output file, it would be extremely undesirable for the old version to be used.

ENEO stands for E̱stablish the Ṉon E̱xistence O̱f. Most operating systems provide a command to delete files. Typically these commands are verbs such as delete, remove, and kill. As a consequence, the designers of delete commands usually consider the command to have failed if it fails to find the file to be deleted. However, in my experience, the most common use for the delete command is to ıestablish the non-existence of one or more files. Typically, a script is starting up and needs to clear the air before getting started. If the files are there, they should be deleted; if they are not, then that's OK too.