From: Dave Burt <dave@...>
Date: 2006-05-20T01:05:38+09:00
Subject: Re: Disk Free Space (Re: Who Wants to Be a Scripting Guy?)

Edwin van Leeuwen wrote:
> I found a ruby version of df a long time ago. It did a syscall(99), so 
> if this syscall is a standard POSIX one then the script should work on 
> all posix compliant os-es
> The relevant part:
>       size = 64
>       unpack_fmt = 'iiiiiiiiiiiiiiii'
>       foo = ' ' * size
>       syscall(99, hd[1], foo)
>       type, @bsize, @blocks, @bfree, @bavail, @files, @ffree, 
> tmp,tmp,@namelen = foo.unpack(unpack_fmt)
>       usage=100*(@blocks-@bfree)/@blocks

In the above code, what's hd? And would this be more or less portable
than my suggestion?

  `df -k #{dir}`[/\n.{20} (\d+)/, 1].to_i * 1024

(Does this work on your *nix?)

Cheers,
Dave