From: Chris Morris <chrismo@...>
Date: 2003-03-06T03:29:41+09:00
Subject: Re: Newbie question regarding drives

IIRC, I don't think there's a handy cross-platform solution.

Here's code from my clUtil lib to do this on Windows:

# Copyright Chris Morris
# BSD License. Full download and license available here:
# http://clabs.org/scrpware.htm -- look for
# cLabs Ruby Utilities

module Windows
  def Windows.drives(typeFilter=nil)
    Drives::drives(typeFilter)
  end

  module Drives
    GetDriveType = Win32API.new("kernel32", "GetDriveTypeA", ['P'], 'L')
    GetLogicalDriveStrings = Win32API.new("kernel32",
"GetLogicalDriveStrings", ['L', 'P'], 'L')

    DRIVE_UNKNOWN      = 0 # The drive type cannot be determined.
    DRIVE_NO_ROOT_DIR  = 1 # The root path is invalid. For example, no
volume is mounted at the path.
    DRIVE_REMOVABLE    = 2 # The disk can be removed from the drive.
    DRIVE_FIXED        = 3 # The disk cannot be removed from the drive.
    DRIVE_REMOTE       = 4 # The drive is a remote (network) drive.
    DRIVE_CDROM        = 5 # The drive is a CD-ROM drive.
    DRIVE_RAMDISK      = 6 # The drive is a RAM disk.
    DriveTypes = {
      DRIVE_UNKNOWN      => 'Unknown',
      DRIVE_NO_ROOT_DIR  => 'Invalid',
      DRIVE_REMOVABLE    => 'Removable/Floppy',
      DRIVE_FIXED        => 'Fixed',
      DRIVE_REMOTE       => 'Network',
      DRIVE_CDROM        => 'CD',
      DRIVE_RAMDISK      => 'RAM'
    }

    Drive = Struct.new('Drive', :name, :type, :typedesc)

    def Drives.drives(typeFilter=nil)
      driveNames = ' ' * 255
      GetLogicalDriveStrings.Call(255, driveNames)
      driveNames.strip!
      driveNames = driveNames.split("\000")
      drivesAry = []
      driveNames.each do |drv|
        type = GetDriveType.Call(drv)
        if (!typeFilter) || (type == typeFilter)
          drive = Drive.new(drv, type, DriveTypes[type])
          drivesAry << drive
        end
      end
      drivesAry
    end
  end
end


----- Original Message -----
From: "Sperberg, Roger" <roger.sperberg@aspenpublishers.com>
To: "ruby-talk ML" <ruby-talk@ruby-lang.org>
Sent: Wednesday, March 05, 2003 12:22 PM
Subject: Newbie question regarding drives


> Can someone advise me of how to find out within my Ruby program what
drives
> are on a system, and what type of drive (local hard drive, floppy, CD-ROM,
> etc.) they are?
>
> I'm working with a Win2000 system, but it might also be used by someone
> running Linux.
>
> TIA,
>
> Roger Sperberg
>