From: Emmanuel Touzery <emmanuel.touzery@...>
Date: 2002-11-30T07:48:23+09:00
Subject: Re: root directory

On Friday 29 November 2002 22:41, Joel VanderWerf wrote:
> Emmanuel Touzery wrote:
> > 	I've been quick to write a Dir.up!() method (i was surprised it's not
> > standard?), however i'm having trouble with the Dir.root?() one.
>
> There's File#dirname:
>
> irb(main):004:0> File.dirname('/usr/local')
> "/usr"
>
> Dunno how well that works with drive letters, net shares, etc. on windows.

I actually found File.split:
irb(main):001:0> File.split("/home")
["/", "home"]
irb(main):002:0> File.split("/")
["/", ""]

encouraging. if file.split(dir)[1] == "" it could mean it's root.

however i don't know how it behaves under windows, but in linux:
irb(main):003:0> File.split("c:\test")
[".", "c:\test"]
irb(main):004:0> File.split("c:\\test")
[".", "c:\\test"]

:O/

emmanuel

PS: for now i'm using the code i posted earlier. i could quickly check that it 
works under windows with standard pathnames (cmd.exe doesn't support UNC 
pathnames, didn't have the time to check for those). still, it's really 
ugly... :O((