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| author | David Herrmann <dh.herrmann@gmail.com> | 2014-07-21 00:27:09 (GMT) |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2014-07-21 21:30:42 (GMT) |
| commit | ba4e9a61ad54c438d4c7b655e94e31f23a6fe13f (patch) | |
| tree | 87fe8f02928f2a1a041718a0feef057251a8323a | |
| parent | bcb898e5873430d8121eb8df07d5fbfb49134167 (diff) | |
| download | linux-ba4e9a61ad54c438d4c7b655e94e31f23a6fe13f.tar.xz | |
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>
| -rw-r--r-- | drivers/input/misc/uinput.c | 6 | ||||
| -rw-r--r-- | include/uapi/linux/uinput.h | 9 |
2 files changed, 15 insertions, 0 deletions
diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c index 883f045..421e29e 100644 --- a/drivers/input/misc/uinput.c +++ b/drivers/input/misc/uinput.c @@ -723,6 +723,12 @@ 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..baeab83 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 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 * and erase_effect callbacks in input_dev must be implemented. |