How to check if string is valid unix path

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How to check if string is valid(doesn't have invalid chars) unix path using c# without mono?

Posted 21-Dec-11 10:27am

apaka

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Sergey Alexandrovich Kryukov 21-Dec-11 16:47pm

Does it mean "some path name which could be a valid path name in Unix file systems" or "path name corresponding to a file or directory which actually exist"? If this is the second option, what is the type of your connection to Unix system do you have?
--SA

apaka 21-Dec-11 16:52pm

It means some path name which could be a valid path name in Unix file systems.

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Sergey Alexandrovich Kryukov · Answer 1 · 2011-12-21T10:59:00

First you need to figure out the sub-set of valid characters and maximum allowed file length in the system. Start here: http://en.wikipedia.org/wiki/Filename[^].

I would first check up the length and then validate the sequence using Regular Expressions, see:
http://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex.aspx[^].
http://en.wikipedia.org/wiki/Regular_expression[^].

This is easy but would need some time to put it right. For example, you can have '.' or '..' in combinations with '/' or file name characters. (This is all true for Windows, but there are many people who incorrectly think it is not.)

—SA