net_use_enum.rb

#unsed in Chef::Util::Windows::NetUse; may come in handy later.
require 'chef/util/windows'

class Chef::Util::Windows::NetUse < Chef::Util::Windows
  def get_all
    list = []
    handle = 0.chr * PTR_SIZE
    rc = ERROR_MORE_DATA

    while rc == ERROR_MORE_DATA
      ptr   = 0.chr * PTR_SIZE
      nread = 0.chr * PTR_SIZE
      total = 0.chr * PTR_SIZE

      rc = NetUseEnum.call(nil, 2, ptr, -1, nread, total, handle)
      if (rc == NERR_Success) || (rc == ERROR_MORE_DATA)
        ptr = ptr.unpack('L')[0]
        nread = nread.unpack('i')[0]
        members = 0.chr * (nread * SIZEOF_USE_INFO_2)
        memcpy(members, ptr, members.size)

        nread.times do |i|
          offset = i * SIZEOF_USE_INFO_2
          use = use_info_2_unpack(members[offset,SIZEOF_USE_INFO_2])
          list << use
        end
        NetApiBufferFree(ptr)
      else
        raise ArgumentError, get_last_error(rc)
      end
    end
    list
  end
end