On Sun, 2008-11-16 at 19:04 +0000, Andy Green wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Somebody in the thread at some point said: > > |> I have removed the mokopatch as requested the other day on > |> stable-tracking now, it should allow an IOCTL to enable and disable > |> touchscreen traffic as mentioned by Neil Brown: > |> > |> ''All we have to do is undo the kernel hack which effectively disables > |> EVIOCGRAB and then it is trivial to turn off the touchscreen. > |> Just open the device and issue that ioctl.'' > | > | I have a question and comment. > | > | I don't yet have a grasp of IOCTL. What would be the fcntl() or ioctl() > | command in python to disable the touchscreeen? > | > | Seems like a useful method to add to frameworkd. > > I found this after googling around for a bit > > ~ case DEVICE_ON: > + if (ioctl(pInfo->fd, EVIOCGRAB, (void *)1)) > + xf86Msg(X_WARNING, "%s: Grab failed (%s)\n", pInfo->name, > + strerror(errno)); > ~ xf86AddEnabledDevice(pInfo); > ~ device->public.on = TRUE; > ~ break; > > ~ case DEVICE_OFF: > + if (ioctl(pInfo->fd, EVIOCGRAB, (void *)0)) > > > ioctl() itself is easily understood, given an open file descriptor it > gives you a side-channel into the driver that services that file > descriptor and allows you to set and query things from the context of > the file descriptor, without performing any actual file operations. > > You can find definition of EVIOCGRAB in /usr/include/linux/input.h for > use in usermode apps. > > I don't know python but that should be enough info for a quick meddle > around, you would first open() the file descriptor normally on > /dev/input/event1 or whatever.
And I don't know C! But I'll see if I can digest enough of it to do something with it. Thanks Andy. digger
signature.asc
Description: This is a digitally signed message part
_______________________________________________ devel mailing list [email protected] https://lists.openmoko.org/mailman/listinfo/devel
