regex validation for windows and *NIX

[basim]

I using the following regex to match valid disk drive for both win and *nix OS.

"(([:alpha:]:(\([^{\|\/|:|*|\"|<|>||]+)?)?)|(\/.+))"}

The regex passes for empty strings. What I am trying to do is match at least the following

c:
c:\
c:\dirname

/a
/dev/hda

Any ideas?

Thanks in advance

[basim]

For all of those interested the regex is

'^{(([a-z]{1}🙂|([a-z]{1}:\)|([a-z]{1}:\[\/:*"<>|]{1,})|(\/.+))$';}