manifests/backlight.pp


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# Manage permissions for backlight devices
class profiles::backlight {
  group { 'backlight':
    system => true,
  }

  $rule = [
    'ACTION=="change"',
    'SUBSYSTEM=="backlight"',
    'RUN+="/bin/chgrp backlight /sys/class/backlight/%k/brightness"',
    'RUN+="/bin/chmod g+w /sys/class/backlight/%k/brightness"',
  ].join(', ')

  file { '/etc/udev/rules.d/backlight.rules':
    content => @("EOF")
      # File managed by Puppet, local changes WILL get overwritten
      $rule
      | EOF
  }
}