Two problems:
  1. You permit "..". Nasty.
  2. Handled properly, there are no "bad" filenames syntactically. Perhaps they point outside an area of your interest, or create a file with an extension that is significant, but that's a semantic issue that your module can never fully understand, unless the checking behavior is passed in.

I suggest you give up your endeavor as "futile". There's nothing "generic" to contribute. All the rules will be application-specific, always.

-- Randal L. Schwartz, Perl hacker
Be sure to read my standard disclaimer if this is a reply.

In reply to •Re: Filepath validation and untainting by merlyn
in thread Filepath validation and untainting by hardburn

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