9.9 Eneo
9.9 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
1 Introduction
The eneo command was added so as to allow regression testing
2 Interface
scripts to ensure that existing output files were not present
3 Scanner
before proceeding with a test run. If FunnelWeb were to fail to
4 Parser
generate an output file, it would be extremely undesirable for
5 Analyser
the old version to be used.
6 Tangle
ENEO stands for 
stablish the 
f. Most
7 Weave
operating systems provide a command to delete files. Typically
8 Shell
these commands are verbs such as "delete", "remove", and
9 Commands
"kill". As a consequence, the designers of delete commands
10 Glossary
usually consider the command to have failed if it fails to find
11 References
the file to be deleted. However, in scripts, the delete command
is very commonly used to 
establish 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. (Note: As far as I
know, the eneo command is original).
Copyright   Ross N. Williams 1992,1999. All rights
http://www.ross.net/funnelweb/reference/commands_eneo.html [3/3/2000 10:44:47 PM]

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