pkgs/pyfire/src/hal.py

   1 #
   2 # minihal.py: Simple wrapper around HAL
   3 #
   4 # Copyright (C) 2007  Red Hat, Inc.  All rights reserved.
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 2 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 #
  19 # Author(s): Bill Nottingham <notting@redhat.com>
  20 #
  21
  22 """Simple wrapper around HAL"""
  23
  24 import dbus
  25
  26 def get_device(udi):
  27     """Retrieve all properties of a particular device (by UDI)"""
  28     try:
  29         bus = dbus.SystemBus()
  30         haldev = dbus.Interface(bus.get_object("org.freedesktop.Hal", udi), "org.freedesktop.Hal.Device")
  31         props = haldev.GetAllProperties()
  32     except dbus.exceptions.DBusException:
  33         return None
  34
  35     if props.has_key('block.device'):
  36         props['device'] = props['block.device'].encode("utf-8")
  37     elif props.has_key('linux.device_file'):
  38         props['device'] = props['linux.device_file'].encode("utf-8")
  39     elif props.has_key('net.interface'):
  40         props['device'] = props['net.interface'].encode("utf-8")
  41     else:
  42         props['device'] = None
  43
  44     props['description'] = ''
  45     if props.has_key('info.product'):
  46         if props.has_key('info.vendor'):
  47             props['description'] = '%s %s' % (props['info.vendor'],props['info.product'])
  48         else:
  49             props['description'] = props['info.product']
  50     else:
  51         props['description'] = props['info.udi']
  52     if props.has_key('net.originating_device'):
  53         pdev = get_device(props['net.originating_device'])
  54         props['description'] = pdev['description']
  55
  56     return props
  57
  58 def get_devices_by_type(type):
  59     """Retrieve all devices of a particular type"""
  60     ret = []
  61     try:
  62         bus = dbus.SystemBus()
  63         hal = dbus.Interface(bus.get_object("org.freedesktop.Hal","/org/freedesktop/Hal/Manager"),"org.freedesktop.Hal.Manager")
  64     except:
  65         return ret
  66     for udi in hal.FindDeviceByCapability(type):
  67         dev = get_device(udi)
  68         if dev:
  69             ret.append(dev)
  70     return ret