Rémi Denis-Courmont schrieb: > On Thursday 28 January 2010 11:53:13 ext Stefan Iwanowitsch, you wrote: > >>> If you just want to see keyboard input, then you'd open the corresponding >>> file(s) in /dev/input/. >>> >> Can I read from /dev/input without interfering with other consumers? >> > > It should work yes. > > >> And do you happen to know, where I can find specs >> on the input device files? >> > > /sys/class/input provides informations on each entries. > > The protocol is documented in Documentation/input/ in the kernel sources: > > | You can use blocking and nonblocking reads, also select() on the > | /dev/input/eventX devices, and you'll always get a whole number of input > | events on a read. Their layout is: > | > | struct input_event { > | struct timeval time; > | unsigned short type; > | unsigned short code; > | unsigned int value; > | }; > | > | 'time' is the timestamp, it returns the time at which the event happened. > | Type is for example EV_REL for relative moment, EV_KEY for a keypress or > | release. More types are defined in include/linux/input.h. > | > | 'code' is event code, for example REL_X or KEY_BACKSPACE, again a complete > | list is in include/linux/input.h. > | > | 'value' is the value the event carries. Either a relative change for > | EV_REL, absolute new value for EV_ABS (joysticks ...), or 0 for EV_KEY for > | release, 1 for keypress and 2 for autorepeat. > > I set up some testcode to check the /dev/input/* files but I didn't read a single byte from them. Does this work with scratchbox? Thanks for your help!
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