[PATCH RESEND 3/5] Input: uinput - add UI_GET_VERSION ioctl
From: David Herrmann <hidden>
Date: 2014-07-19 13:11:03
Subsystem:
input (keyboard, mouse, joystick, touchscreen) drivers, the rest · Maintainers:
Dmitry Torokhov, Linus Torvalds
This ioctl is the counterpart to EVIOCGVERSION and returns the uinput-version the kernel was compiled with. Reviewed-by: Peter Hutterer <redacted> Signed-off-by: David Herrmann <redacted> --- drivers/input/misc/uinput.c | 6 ++++++ include/uapi/linux/uinput.h | 9 +++++++++ 2 files changed, 15 insertions(+)
diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c
index 615324c..a2a3895 100644
--- a/drivers/input/misc/uinput.c
+++ b/drivers/input/misc/uinput.c@@ -722,6 +722,12 @@ static long uinput_ioctl_handler(struct file *file, unsigned int cmd, } switch (cmd) { + case UI_GET_VERSION: + if (put_user(UINPUT_VERSION, + (unsigned int __user*)p)) + retval = -EFAULT; + goto out; + case UI_DEV_CREATE: retval = uinput_create_device(udev); goto out;
diff --git a/include/uapi/linux/uinput.h b/include/uapi/linux/uinput.h
index 0389b48..19339cf 100644
--- a/include/uapi/linux/uinput.h
+++ b/include/uapi/linux/uinput.h@@ -84,6 +84,15 @@ struct uinput_ff_erase { */ #define UI_GET_SYSNAME(len) _IOC(_IOC_READ, UINPUT_IOCTL_BASE, 300, len) +/** + * UI_GET_VERSION - Return uinput version of the kernel + * + * This writes the kernel's uinput version into the integer pointed to by the + * ioctl argument. The uinput-version is hard-coded in the kernel and + * 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 * and erase_effect callbacks in input_dev must be implemented.
--
2.0.2