After all, if the user is going to try to mess with the client, all he can do is screw himself.

Even it's result of bad input, (perhaps especially if ...) it will be in the user's mind "the program's fault" -- "the program trashed my disk/registry/irreplacable data file/..." and you'll be the one who gets bad-mouthed.

If *, (), rm -rf /, ;"@{unlink <*>}" aren't valid in filenames, then don't let them be there. And having Perl cover your a** takes only one extra char!

In reply to Re^4: Taint mode... use all the time? by cbatjesmond
in thread Taint mode... use all the time? by jfroebe

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