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Commit ba4e9a61 authored Jul 20, 2014 by David Herrmann Committed by Dmitry Torokhov Jul 21, 2014

Input: uinput - add UI_GET_VERSION ioctl



This ioctl is the counterpart to EVIOCGVERSION and returns the
uinput-version the kernel was compiled with.

Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

parent bcb898e5

drivers/input/misc/uinput.c

+6 −0

Original line number	Original line	Diff line number	Diff line
	@@ -723,6 +723,12 @@ static long uinput_ioctl_handler(struct file *file, unsigned int cmd,
	}		}

	switch (cmd) {		switch (cmd) {
			case UI_GET_VERSION:
			if (put_user(UINPUT_VERSION,
			(unsigned int __user *)p))
			retval = -EFAULT;
			goto out;

	case UI_DEV_CREATE:		case UI_DEV_CREATE:
	retval = uinput_create_device(udev);		retval = uinput_create_device(udev);
	goto out;		goto out;

include/uapi/linux/uinput.h

+9 −0

Original line number	Original line	Diff line number	Diff line
	@@ -84,6 +84,15 @@ struct uinput_ff_erase {
	*/		*/
	#define UI_GET_SYSNAME(len) _IOC(_IOC_READ, UINPUT_IOCTL_BASE, 300, len)		#define UI_GET_SYSNAME(len) _IOC(_IOC_READ, UINPUT_IOCTL_BASE, 300, len)

			/**
			* UI_GET_VERSION - Return version of uinput protocol
			*
			* This writes uinput protocol version implemented by the kernel into
			* the integer pointed to by the ioctl argument. The protocol version
			* is hard-coded in the kernel and is independent of the uinput device.
			*/
			#define UI_GET_VERSION _IOR(UINPUT_IOCTL_BASE, 301, unsigned int)

	/*		/*
	* To write a force-feedback-capable driver, the upload_effect		* To write a force-feedback-capable driver, the upload_effect
	* and erase_effect callbacks in input_dev must be implemented.		* and erase_effect callbacks in input_dev must be implemented.