Beefy Boxes and Bandwidth Generously Provided by pair Networks
Pathologically Eclectic Rubbish Lister
 
PerlMonks  

Re^3: One true regexp for untainting windows filenames?

by ikegami (Pope)
on Jan 09, 2009 at 05:33 UTC ( #735084=note: print w/ replies, xml ) Need Help??


in reply to Re^2: One true regexp for untainting windows filenames?
in thread One true regexp for untainting windows filenames?

There is no a string that

qr{(\A (?: .* / (?: \.\.?\z )? )? [^/]* )}msx

won't match.

It's wrong for two reasons.

  • "foo" gets "untainted" as "".
  • "x/xx\0xx"" is believed to be a valid file name, but it isn't.

Valid unix paths and only valid unix paths match

qr{^([\0]+)\z}

(Although that doesn't mean there can ever be a file referenced by that path.)


Comment on Re^3: One true regexp for untainting windows filenames?
Select or Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://735084]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others about the Monastery: (6)
As of 2014-09-17 22:10 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    How do you remember the number of days in each month?











    Results (100 votes), past polls