Merge "Add a system property test before scanning touch video devices." (619afde8) · Commits · e / os / android_frameworks_native-old

services/inputflinger/EventHub.cpp

+27 −6

Original line number	Diff line number	Diff line
		@@ -40,6 +40,7 @@
		#include <hardware_legacy/power.h>

		#include <android-base/stringprintf.h>
		#include <cutils/properties.h>
		#include <openssl/sha.h>
		#include <utils/Log.h>
		#include <utils/Timers.h>
		@@ -108,6 +109,19 @@ static bool isV4lTouchNode(const char* name) {
		return strstr(name, "v4l-touch") == name;
		}

		/**
		* Returns true if V4L devices should be scanned.
		*
		* The system property ro.input.video_enabled can be used to control whether
		* EventHub scans and opens V4L devices. As V4L does not support multiple
		* clients, EventHub effectively blocks access to these devices when it opens
		* them. This property enables other clients to read these devices for testing
		* and development.
		*/
		static bool isV4lScanningEnabled() {
		return property_get_bool("ro.input.video_enabled", true /* default_value */);
		}

		static nsecs_t processEventTimestamp(const struct input_event& event) {
		// Use the time specified in the event instead of the current time
		// so that downstream code can get more accurate estimates of
		@@ -237,9 +251,14 @@ EventHub::EventHub(void) :
		mInputWd = inotify_add_watch(mINotifyFd, DEVICE_PATH, IN_DELETE \| IN_CREATE);
		LOG_ALWAYS_FATAL_IF(mInputWd < 0, "Could not register INotify for %s: %s",
		DEVICE_PATH, strerror(errno));
		if (isV4lScanningEnabled()) {
		mVideoWd = inotify_add_watch(mINotifyFd, VIDEO_DEVICE_PATH, IN_DELETE \| IN_CREATE);
		LOG_ALWAYS_FATAL_IF(mVideoWd < 0, "Could not register INotify for %s: %s",
		VIDEO_DEVICE_PATH, strerror(errno));
		} else {
		mVideoWd = -1;
		ALOGI("Video device scanning disabled");
		}

		struct epoll_event eventItem;
		memset(&eventItem, 0, sizeof(eventItem));
		@@ -1056,10 +1075,12 @@ void EventHub::scanDevicesLocked() {
		if(result < 0) {
		ALOGE("scan dir failed for %s", DEVICE_PATH);
		}
		if (isV4lScanningEnabled()) {
		result = scanVideoDirLocked(VIDEO_DEVICE_PATH);
		if (result != OK) {
		ALOGE("scan video dir failed for %s", VIDEO_DEVICE_PATH);
		}
		}
		if (mDevices.indexOfKey(VIRTUAL_KEYBOARD_ID) < 0) {
		createVirtualKeyboardLocked();
		}