Possible BUG with the Script FileType

[Matt Kettler]

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Mailing List wrote:

>Tested against:
>MailScaner 4.38.10 and MailScanner 4.40.11
>
>Sending an EPS file thru when the filetype check denies script files
>blocks the file.
>
>My rough guess is that MailScanner parses the output of the file command
>and finds the letters "script" and interprets it as such.
>

Since the second field in filetypes.rules.conf is a regular expression
"script" will definitely match "Postscript". Regular expressions are by
nature a substring search, not an exact match.

Ditto applies to filename.rules.conf, which is why you see ^ and $ in
most of the rules there, to force it to be a whole-line match on the
filename.

If you want to avoid the problem in filetypes you can't use the ^ and $
trick, as there's other text on the line. Instead you could change it to
\bscript\b, which will require word boundaries. However, you won't match
any other all-one-word script names. Another option would be adding an
allow word for postscript before the deny rule for script.

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