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Text File  |  2006-11-29  |  1KB  |  40 lines
  1. #!/bin/sh
  2. #
  3. # Copyright (C) 2005 Richard Hughes <richard@hughsie.com>
  4. #
  5. # This program is free software; you can redistribute it and/or modify
  6. # it under the terms of the GNU General Public License as published by
  7. # the Free Software Foundation; either version 2 of the License, or
  8. # (at your option) any later version.
  9.  
  10. # Check for environment variables
  11. if [ -z "$HAL_PROP_LAPTOP_PANEL_ACCESS_METHOD" ] || 
  12.    [ -z "$HAL_PROP_LAPTOP_PANEL_NUM_LEVELS" ] ; then
  13.         echo "org.freedesktop.Hal.Device.UnknownError" >&2
  14.         echo "Missing or empty environment variable(s)." >&2
  15.         echo "This script should be started by hald." >&2
  16.         exit 1
  17. fi
  18.  
  19. # TODO: check privilege
  20.  
  21. # read value for set brightness
  22. read value
  23.  
  24. # Check for values outside range
  25. if [ ${value} -lt 0 ] || [ ${value} -ge $HAL_PROP_LAPTOP_PANEL_NUM_LEVELS ]; then
  26.     echo "org.freedesktop.Hal.Device.LaptopPanel.Invalid" >&2
  27.     echo "Brightness has to be between 0 and $((HAL_PROP_LAPTOP_PANEL_NUM_LEVELS - 1))" >&2
  28.     exit 1
  29. fi
  30.  
  31. export value
  32.  
  33. if [ -n "$HALD_UNAME_S" -a -x ./$HALD_UNAME_S/hal-system-lcd-set-brightness-$HALD_UNAME_S ]; then
  34.     exec ./$HALD_UNAME_S/hal-system-lcd-set-brightness-$HALD_UNAME_S $@
  35. else
  36.     echo "org.freedesktop.Hal.Device.UnknownError" >&2
  37.     echo "No back-end for your operating system" >&2
  38.     exit 1
  39. fi
  40.