From: Darken <lokean.darken@...>
Date: 2006-06-23T00:03:18+09:00
Subject: Re: disk_free_space

Thank you... parsing df output is working fine... anyway,it will be nice
to have more... ruby.. solution.
> Darken wrote:
>   
>> I need an equivalent of $subj php function in ruby... I have a directory
>> and I need to find out how much I can save there... Only idea I have is
>> to find mountpoint and then parse /proc, but it's very ugly solution :-)
>>     
>
> You can do this simply if not truly portably like so:
>
> class << self
>   define_method :disk_free_space, &begin
>     require 'Win32API'
>     df = Win32API.new("kernel32", "GetDiskFreeSpaceEx", "pppp", "i")
>     proc do |dir|
>       df.call(dir, ret="    ", "    ", "    ")
>       ret.unpack("L")[0]
>     end
>   rescue LoadError
>     proc do |dir|
>       `df -k #{dir}`[/\S+\s+\S+\s+\S+\s+(\d+)/, 1].to_i * 1024
>     end
>   end
> end
>
> Obviously if your `df -k foo` gives you output in a different format,
> you'll need to change the regular expression. (The way I've written it,
> it's looking for available space in 1k blocks in the fourth column.)
>
> Cheers,
> Dave
>
>
>