On Tue, Nov 24, 2009 at 09:57:29PM +0200, Mika Westerberg wrote: > Hi Daniel, > > On Tue, Nov 24, 2009 at 06:33:56PM +0100, Daniel Mack wrote: > > Hi, > > > > is there a way to query the last state an input device reported, > > preferably even for a special key mask? When a button is pressed and a > > userspace application is started, it should be able to figure out the > > current state, especially because those GPIO signals are likely > > connected to other peripherals to report arbitrary events in the system. > > Is there any such framework for that purpose? > > Not sure whether this helps, but you can look <linux/input.h> and > check what ioctl()s it provides for this purpose. At least there > seems to be: > EVIOCGKEY - get global keystate > EVIOCGSW - get all switch states > EVIOCGBIT - get event bits > > Maybe you can use some of these to query current status of input events. This is correct. The first 2 ioctls are there so userspace can get the current state of input device. The last ioctl is to query capabilities, not the state though. -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
