BadVPN – Blame information for rev 1
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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1 | office | 1 | # |
| 2 | # NCD input event handling example program. |
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| 3 | # |
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| 4 | # This program responds to volume key presses by synchronously calling an external |
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| 5 | # script for muting and adjusting volume, and responds to power button presses by |
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| 6 | # suspending using pm-suspend. |
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| 7 | # |
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| 8 | # It uses process_manager() and sys.watch_input() to dynamically create and remove |
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| 9 | # processes that deal with specific input devices. The individual input device processes |
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| 10 | # then use sys.evdev() to handle input events from their input device. |
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| 11 | # |
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| 12 | |||
| 13 | process events_main { |
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| 14 | # Volume control script, called with argument "up", "down" or "mute". |
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| 15 | var("/usr/local/bin/volumekey") volume_script; |
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| 16 | |||
| 17 | # Suspend command. |
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| 18 | list("/usr/sbin/pm-suspend") suspend_cmd; |
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| 19 | |||
| 20 | provide("GLOBAL"); |
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| 21 | } |
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| 22 | |||
| 23 | process events_watcher { |
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| 24 | depend("GLOBAL"); |
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| 25 | |||
| 26 | # Create process manager. |
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| 27 | process_manager() manager; |
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| 28 | |||
| 29 | # Wait for input device events. |
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| 30 | sys.watch_input("event") watcher; |
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| 31 | |||
| 32 | # Dispatch. |
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| 33 | concat("events_watcher_", watcher.event_type) func; |
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| 34 | call(func, {}); |
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| 35 | |||
| 36 | # Next event. |
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| 37 | watcher->nextevent(); |
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| 38 | } |
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| 39 | |||
| 40 | template events_watcher_added { |
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| 41 | # Start event handling process for this device. |
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| 42 | _caller.manager->start(_caller.watcher.devname, "events_input_device", {_caller.watcher.devname}); |
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| 43 | } |
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| 44 | |||
| 45 | template events_watcher_removed { |
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| 46 | # Stop event handling process for this device. |
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| 47 | _caller.manager->stop(_caller.watcher.devname); |
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| 48 | } |
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| 49 | |||
| 50 | template events_input_device { |
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| 51 | # Alias arguments. |
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| 52 | var(_arg0) dev; |
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| 53 | |||
| 54 | # Get global. |
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| 55 | depend("GLOBAL") gdep; |
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| 56 | |||
| 57 | # Wait for input events. |
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| 58 | sys.evdev(dev) evdev; |
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| 59 | |||
| 60 | # Query event details. |
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| 61 | strcmp(evdev.code, "KEY_MUTE") is_mute; |
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| 62 | strcmp(evdev.code, "KEY_VOLUMEUP") is_vup; |
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| 63 | strcmp(evdev.code, "KEY_VOLUMEDOWN") is_vdown; |
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| 64 | strcmp(evdev.code, "KEY_POWER") is_power; |
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| 65 | strcmp(evdev.value, "1") is_pressed; |
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| 66 | |||
| 67 | # Compute where to dispatch the event. |
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| 68 | and(is_mute, is_pressed) dispatch_mute; |
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| 69 | and(is_vup, is_pressed) dispatch_vup; |
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| 70 | and(is_vdown, is_pressed) dispatch_vdown; |
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| 71 | and(is_power, is_pressed) dispatch_power; |
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| 72 | |||
| 73 | # Dispatch event. |
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| 74 | choose({ |
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| 75 | {dispatch_mute, "events_input_event_mute"}, |
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| 76 | {dispatch_vup, "events_input_event_vup"}, |
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| 77 | {dispatch_vdown, "events_input_event_vdown"}, |
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| 78 | {dispatch_power, "events_input_event_power"}}, |
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| 79 | "<none>" |
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| 80 | ) func; |
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| 81 | call(func, {}); |
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| 82 | |||
| 83 | # Next event. |
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| 84 | evdev->nextevent(); |
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| 85 | } |
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| 86 | |||
| 87 | template events_input_event_mute { |
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| 88 | runonce({_caller.gdep.volume_script, "mute"}); |
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| 89 | } |
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| 90 | |||
| 91 | template events_input_event_vup { |
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| 92 | runonce({_caller.gdep.volume_script, "up"}); |
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| 93 | } |
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| 94 | |||
| 95 | template events_input_event_vdown { |
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| 96 | runonce({_caller.gdep.volume_script, "down"}); |
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| 97 | } |
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| 98 | |||
| 99 | template events_input_event_power { |
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| 100 | runonce(_caller.gdep.suspend_cmd); |
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| 101 | } |