Uinput shell command: Support string literals for evdev event codes (32167af0) · Commits · e / os / android_frameworks_base

cmds/uinput/README.md

+32 −28

Original line number	Diff line number	Diff line
		@@ -59,21 +59,24 @@ multiple devices are registered.
		and `"bluetooth"`.

		Device configuration is used to configure the uinput device. The `type` field provides a `UI_SET_*`
		control code, and data is a vector of control values to be sent to the uinput device, which depends
		on the control code.
		control code as an integer value or a string label (e.g. `"UI_SET_EVBIT"`), and data is a vector of
		control values to be sent to the uinput device, which depends on the control code.

		\| Field \| Type \| Description \|
		\|:-------------:\|:-------------:\|:-------------------------- \|
		\| `type` \| integer \| `UI_SET_` control type \|
		\| `data` \| integer array \| control values \|
		\|:-------------:\|:---------------------:\|:-----------------------\|
		\| `type` \| integer\\|string \| `UI_SET_` control type \|
		\| `data` \| integer\\|string array \| control values \|

		Due to the sequential nature in which this is parsed, the `type` field must be specified before
		the `data` field in this JSON Object.

		`ff_effects_max` must be provided if `UI_SET_FFBIT` is used in `configuration`.

		`abs_info` fields are provided to set the device axes information. It is an array of below objects:

		\| Field \| Type \| Description \|
		\|:-------------:\|:-------------:\|:-------------------------- \|
		\| `code` \| integer \| Axis code \|
		\|:-------------:\|:---------------:\|:------------------------\|
		\| `code` \| integer\\|string \| Axis code or label \|
		\| `info` \| object \| Axis information object \|

		The axis information object is defined as below, with the fields having the same meaning as those
		@@ -99,16 +102,17 @@ Example:
		"pid": 0x2c42,
		"bus": "usb",
		"configuration":[
		{"type":100, "data":[1, 21]}, // UI_SET_EVBIT : EV_KEY and EV_FF
		{"type":101, "data":[11, 2, 3, 4]}, // UI_SET_KEYBIT : KEY_0 KEY_1 KEY_2 KEY_3
		{"type":107, "data":[80]} // UI_SET_FFBIT : FF_RUMBLE
		{"type":"UI_SET_EVBIT", "data":["EV_KEY", "EV_FF"]},
		{"type":"UI_SET_KEYBIT", "data":["KEY_0", "KEY_1", "KEY_2", "KEY_3"]},
		{"type":"UI_SET_ABSBIT", "data":["ABS_Y", "ABS_WHEEL"]},
		{"type":"UI_SET_FFBIT", "data":["FF_RUMBLE"]}
		],
		"ff_effects_max" : 1,
		"abs_info": [
		{"code":1, "info": {"value":20, "minimum":-255,
		{"code":"ABS_Y", "info": {"value":20, "minimum":-255,
		"maximum":255, "fuzz":0, "flat":0, "resolution":1}
		},
		{"code":8, "info": {"value":-50, "minimum":-255,
		{"code":"ABS_WHEEL", "info": {"value":-50, "minimum":-255,
		"maximum":255, "fuzz":0, "flat":0, "resolution":1}
		}
		]
		@@ -158,10 +162,10 @@ Example:
		Send an array of uinput event packets to the uinput device

		\| Field \| Type \| Description \|
		\|:-------------:\|:-------------:\|:-------------------------- \|
		\|:-------------:\|:---------------------:\|:-------------------------- \|
		\| `id` \| integer \| Device ID \|
		\| `command` \| string \| Must be set to "inject" \|
		\| `events` \| integer array \| events to inject \|
		\| `events` \| integer\\|string array \| events to inject \|

		The `events` parameter is an array of integers in sets of three: a type, an axis code, and an axis
		value, like you'd find in Linux's `struct input_event`. For example, sending presses of the 0 and 1
		@@ -171,14 +175,14 @@ keys would look like this:
		{
		"id": 1,
		"command": "inject",
		"events": [0x01, 0xb, 0x1, // EV_KEY, KEY_0, DOWN
		0x00, 0x00, 0x00, // EV_SYN, SYN_REPORT, 0
		0x01, 0x0b, 0x00, // EV_KEY, KEY_0, UP
		0x00, 0x00, 0x00, // EV_SYN, SYN_REPORT, 0
		0x01, 0x2, 0x1, // EV_KEY, KEY_1, DOWN
		0x00, 0x00, 0x01, // EV_SYN, SYN_REPORT, 0
		0x01, 0x02, 0x00, // EV_KEY, KEY_1, UP
		0x00, 0x00, 0x01 // EV_SYN, SYN_REPORT, 0
		"events": ["EV_KEY", "KEY_0", 1,
		"EV_SYN", "SYN_REPORT", 0,
		"EV_KEY", "KEY_0", 0,
		"EV_SYN", "SYN_REPORT", 0,
		"EV_KEY", "KEY_1", 1,
		"EV_SYN", "SYN_REPORT", 0,
		"EV_KEY", "KEY_1", 0,
		"EV_SYN", "SYN_REPORT", 0
		]
		}
		```

cmds/uinput/jni/Android.bp

+1 −0

Original line number	Diff line number	Diff line
		@@ -21,6 +21,7 @@ cc_library_shared {
		"libbase",
		"libbinder",
		"liblog",
		"libinput",
		"libnativehelper",
		],

cmds/uinput/jni/com_android_commands_uinput_Device.cpp

+34 −14

Original line number	Diff line number	Diff line
		@@ -16,12 +16,24 @@

		#define LOG_TAG "UinputCommandDevice"

		#include <linux/uinput.h>
		#include "com_android_commands_uinput_Device.h"

		#include <android-base/stringprintf.h>
		#include <android/looper.h>
		#include <android_os_Parcel.h>
		#include <fcntl.h>
		#include <input/InputEventLabels.h>
		#include <inttypes.h>
		#include <jni.h>
		#include <linux/uinput.h>
		#include <log/log.h>
		#include <nativehelper/JNIHelp.h>
		#include <nativehelper/ScopedLocalRef.h>
		#include <nativehelper/ScopedPrimitiveArray.h>
		#include <nativehelper/ScopedUtfChars.h>
		#include <time.h>
		#include <unistd.h>

		#include <algorithm>
		#include <array>
		#include <cstdio>
		@@ -30,19 +42,6 @@
		#include <memory>
		#include <vector>

		#include <android/looper.h>
		#include <android_os_Parcel.h>
		#include <jni.h>
		#include <log/log.h>
		#include <nativehelper/JNIHelp.h>
		#include <nativehelper/ScopedLocalRef.h>
		#include <nativehelper/ScopedPrimitiveArray.h>
		#include <nativehelper/ScopedUtfChars.h>

		#include <android-base/stringprintf.h>

		#include "com_android_commands_uinput_Device.h"

		namespace android {
		namespace uinput {

		@@ -307,6 +306,21 @@ static void setAbsInfo(JNIEnv* env, jclass /* clazz */, jint handle, jint axisCo
		::ioctl(static_cast<int>(handle), UI_ABS_SETUP, &absSetup);
		}

		static jint getEvdevEventTypeByLabel(JNIEnv* env, jclass /* clazz */, jstring rawLabel) {
		ScopedUtfChars label(env, rawLabel);
		return InputEventLookup::getLinuxEvdevEventTypeByLabel(label.c_str()).value_or(-1);
		}

		static jint getEvdevEventCodeByLabel(JNIEnv* env, jclass /* clazz */, jint type, jstring rawLabel) {
		ScopedUtfChars label(env, rawLabel);
		return InputEventLookup::getLinuxEvdevEventCodeByLabel(type, label.c_str()).value_or(-1);
		}

		static jint getEvdevInputPropByLabel(JNIEnv* env, jclass /* clazz */, jstring rawLabel) {
		ScopedUtfChars label(env, rawLabel);
		return InputEventLookup::getLinuxEvdevInputPropByLabel(label.c_str()).value_or(-1);
		}

		static JNINativeMethod sMethods[] = {
		{"nativeOpenUinputDevice",
		"(Ljava/lang/String;IIIIILjava/lang/String;"
		@@ -316,6 +330,12 @@ static JNINativeMethod sMethods[] = {
		{"nativeConfigure", "(II[I)V", reinterpret_cast<void*>(configure)},
		{"nativeSetAbsInfo", "(IILandroid/os/Parcel;)V", reinterpret_cast<void*>(setAbsInfo)},
		{"nativeCloseUinputDevice", "(J)V", reinterpret_cast<void*>(closeUinputDevice)},
		{"nativeGetEvdevEventTypeByLabel", "(Ljava/lang/String;)I",
		reinterpret_cast<void*>(getEvdevEventTypeByLabel)},
		{"nativeGetEvdevEventCodeByLabel", "(ILjava/lang/String;)I",
		reinterpret_cast<void*>(getEvdevEventCodeByLabel)},
		{"nativeGetEvdevInputPropByLabel", "(Ljava/lang/String;)I",
		reinterpret_cast<void*>(getEvdevInputPropByLabel)},
		};

		int register_com_android_commands_uinput_Device(JNIEnv* env) {

cmds/uinput/src/com/android/commands/uinput/Device.java

+31 −0

Original line number	Diff line number	Diff line
		@@ -66,6 +66,9 @@ public class Device {
		private static native void nativeInjectEvent(long ptr, int type, int code, int value);
		private static native void nativeConfigure(int handle, int code, int[] configs);
		private static native void nativeSetAbsInfo(int handle, int axisCode, Parcel axisParcel);
		private static native int nativeGetEvdevEventTypeByLabel(String label);
		private static native int nativeGetEvdevEventCodeByLabel(int type, String label);
		private static native int nativeGetEvdevInputPropByLabel(String label);

		public Device(int id, String name, int vid, int pid, int bus,
		SparseArray<int[]> configuration, int ffEffectsMax,
		@@ -234,4 +237,32 @@ public class Device {
		msg.sendToTarget();
		}
		}

		static int getEvdevEventTypeByLabel(String label) {
		final var type = nativeGetEvdevEventTypeByLabel(label);
		if (type < 0) {
		throw new IllegalArgumentException(
		"Failed to get evdev event type from label: " + label);
		}
		return type;
		}

		static int getEvdevEventCodeByLabel(int type, String label) {
		final var code = nativeGetEvdevEventCodeByLabel(type, label);
		if (code < 0) {
		throw new IllegalArgumentException(
		"Failed to get evdev event code for type " + type + " from label: " + label);
		}
		return code;

		}

		static int getEvdevInputPropByLabel(String label) {
		final var prop = nativeGetEvdevInputPropByLabel(label);
		if (prop < 0) {
		throw new IllegalArgumentException(
		"Failed to get evdev input prop from label: " + label);
		}
		return prop;
		}
		}

cmds/uinput/src/com/android/commands/uinput/Event.java

+139 −24

Original line number	Diff line number	Diff line
		@@ -25,6 +25,9 @@ import java.io.IOException;
		import java.io.InputStreamReader;
		import java.util.ArrayList;
		import java.util.Arrays;
		import java.util.List;
		import java.util.Objects;
		import java.util.function.Function;
		import java.util.stream.IntStream;

		import src.com.android.commands.uinput.InputAbsInfo;
		@@ -39,7 +42,35 @@ public class Event {
		public static final String COMMAND_REGISTER = "register";
		public static final String COMMAND_DELAY = "delay";
		public static final String COMMAND_INJECT = "inject";
		private static final int ABS_CNT = 64;
		private static final int EV_KEY = 0x01;
		private static final int EV_REL = 0x02;
		private static final int EV_ABS = 0x03;
		private static final int EV_MSC = 0x04;
		private static final int EV_SW = 0x05;
		private static final int EV_LED = 0x11;
		private static final int EV_SND = 0x12;
		private static final int EV_FF = 0x15;

		private enum UinputControlCode {
		UI_SET_EVBIT("UI_SET_EVBIT", 100),
		UI_SET_KEYBIT("UI_SET_KEYBIT", 101),
		UI_SET_RELBIT("UI_SET_RELBIT", 102),
		UI_SET_ABSBIT("UI_SET_ABSBIT", 103),
		UI_SET_MSCBIT("UI_SET_MSCBIT", 104),
		UI_SET_LEDBIT("UI_SET_LEDBIT", 105),
		UI_SET_SNDBIT("UI_SET_SNDBIT", 106),
		UI_SET_FFBIT("UI_SET_FFBIT", 107),
		UI_SET_SWBIT("UI_SET_SWBIT", 109),
		UI_SET_PROPBIT("UI_SET_PROPBIT", 110);

		final String mName;
		final int mValue;

		UinputControlCode(String name, int value) {
		this.mName = name;
		this.mValue = value;
		}
		}

		// These constants come from "include/uapi/linux/input.h" in the kernel
		enum Bus {
		@@ -257,7 +288,7 @@ public class Event {
		eb.setBus(readBus());
		break;
		case "events":
		int[] injections = readIntList().stream()
		int[] injections = readInjectedEvents().stream()
		.mapToInt(Integer::intValue).toArray();
		eb.setInjections(injections);
		break;
		@@ -293,12 +324,17 @@ public class Event {
		return e;
		}

		private ArrayList<Integer> readIntList() throws IOException {
		ArrayList<Integer> data = new ArrayList<Integer>();
		private ArrayList<Integer> readInjectedEvents() throws IOException {
		ArrayList<Integer> data = new ArrayList<>();
		try {
		mReader.beginArray();
		while (mReader.hasNext()) {
		data.add(Integer.decode(mReader.nextString()));
		// Read events in groups of three, because we expect an event type, event code,
		// and event value.
		final int type = readEvdevEventType();
		data.add(type);
		data.add(readEvdevEventCode(type));
		data.add(readInt());
		}
		mReader.endArray();
		} catch (IllegalStateException \| NumberFormatException e) {
		@@ -309,22 +345,32 @@ public class Event {
		return data;
		}

		private byte[] readData() throws IOException {
		ArrayList<Integer> data = readIntList();
		byte[] rawData = new byte[data.size()];
		for (int i = 0; i < data.size(); i++) {
		int d = data.get(i);
		if ((d & 0xFF) != d) {
		throw new IllegalStateException("Invalid data, all values must be byte-sized");
		private int readValueAsInt(Function<String, Integer> stringToInt) throws IOException {
		switch (mReader.peek()) {
		case NUMBER: {
		return mReader.nextInt();
		}
		case STRING: {
		final var str = mReader.nextString();
		try {
		// Attempt to first parse the value as an int.
		return Integer.decode(str);
		} catch (NumberFormatException e) {
		// Then fall back to the supplied function.
		return stringToInt.apply(str);
		}
		}
		default: {
		throw new IllegalStateException(
		"Encountered malformed data. Expected int or string.");
		}
		rawData[i] = (byte) d;
		}
		return rawData;
		}

		private int readInt() throws IOException {
		String val = mReader.nextString();
		return Integer.decode(val);
		return readValueAsInt((str) -> {
		throw new IllegalStateException("Encountered malformed data. Expected int.");
		});
		}

		private Bus readBus() throws IOException {
		@@ -338,17 +384,20 @@ public class Event {
		try {
		mReader.beginArray();
		while (mReader.hasNext()) {
		int type = 0;
		UinputControlCode controlCode = null;
		IntStream data = null;
		mReader.beginObject();
		while (mReader.hasNext()) {
		String name = mReader.nextName();
		switch (name) {
		case "type":
		type = readInt();
		controlCode = readUinputControlCode();
		break;
		case "data":
		data = readIntList().stream().mapToInt(Integer::intValue);
		Objects.requireNonNull(controlCode,
		"Configuration 'type' must be specified before 'data'.");
		data = readDataForControlCode(controlCode)
		.stream().mapToInt(Integer::intValue);
		break;
		default:
		consumeRemainingElements();
		@@ -358,9 +407,9 @@ public class Event {
		}
		}
		mReader.endObject();
		if (data != null) {
		final int[] existing = configuration.get(type);
		configuration.put(type, existing == null ? data.toArray()
		if (controlCode != null && data != null) {
		final int[] existing = configuration.get(controlCode.mValue);
		configuration.put(controlCode.mValue, existing == null ? data.toArray()
		: IntStream.concat(IntStream.of(existing), data).toArray());
		}
		}
		@@ -373,6 +422,60 @@ public class Event {
		return configuration;
		}

		private UinputControlCode readUinputControlCode() throws IOException {
		var code = readValueAsInt((controlTypeStr) -> {
		for (UinputControlCode controlCode : UinputControlCode.values()) {
		if (controlCode.mName.equals(controlTypeStr)) {
		return controlCode.mValue;
		}
		}
		return -1;
		});
		for (UinputControlCode controlCode : UinputControlCode.values()) {
		if (controlCode.mValue == code) {
		return controlCode;
		}
		}
		return null;
		}

		private List<Integer> readDataForControlCode(
		UinputControlCode controlCode) throws IOException {
		return switch (controlCode) {
		case UI_SET_EVBIT -> readArrayAsInts(this::readEvdevEventType);
		case UI_SET_KEYBIT -> readArrayAsInts(() -> readEvdevEventCode(EV_KEY));
		case UI_SET_RELBIT -> readArrayAsInts(() -> readEvdevEventCode(EV_REL));
		case UI_SET_ABSBIT -> readArrayAsInts(() -> readEvdevEventCode(EV_ABS));
		case UI_SET_MSCBIT -> readArrayAsInts(() -> readEvdevEventCode(EV_MSC));
		case UI_SET_LEDBIT -> readArrayAsInts(() -> readEvdevEventCode(EV_LED));
		case UI_SET_SNDBIT -> readArrayAsInts(() -> readEvdevEventCode(EV_SND));
		case UI_SET_FFBIT -> readArrayAsInts(() -> readEvdevEventCode(EV_FF));
		case UI_SET_SWBIT -> readArrayAsInts(() -> readEvdevEventCode(EV_SW));
		case UI_SET_PROPBIT -> readArrayAsInts(this::readEvdevInputProp);
		};
		}

		interface IntValueReader {
		int readNextValue() throws IOException;
		}

		private ArrayList<Integer> readArrayAsInts(
		IntValueReader nextValueReader) throws IOException {
		ArrayList<Integer> data = new ArrayList<>();
		try {
		mReader.beginArray();
		while (mReader.hasNext()) {
		data.add(nextValueReader.readNextValue());
		}
		mReader.endArray();
		} catch (IllegalStateException \| NumberFormatException e) {
		consumeRemainingElements();
		mReader.endArray();
		throw new IllegalStateException("Encountered malformed data.", e);
		}
		return data;
		}

		private InputAbsInfo readAbsInfo() throws IllegalStateException, IOException {
		InputAbsInfo absInfo = new InputAbsInfo();
		try {
		@@ -426,7 +529,7 @@ public class Event {
		String name = mReader.nextName();
		switch (name) {
		case "code":
		type = readInt();
		type = readEvdevEventCode(EV_ABS);
		break;
		case "info":
		absInfo = readAbsInfo();
		@@ -452,6 +555,18 @@ public class Event {
		return infoArray;
		}

		private int readEvdevEventType() throws IOException {
		return readValueAsInt(Device::getEvdevEventTypeByLabel);
		}

		private int readEvdevEventCode(int type) throws IOException {
		return readValueAsInt((str) -> Device.getEvdevEventCodeByLabel(type, str));
		}

		private int readEvdevInputProp() throws IOException {
		return readValueAsInt(Device::getEvdevInputPropByLabel);
		}

		private void consumeRemainingElements() throws IOException {
		while (mReader.hasNext()) {
		mReader.skipValue();