create led dump

Bug: 240530709
Test: adb bugreport
Change-Id: I115e8bcaac0dd6fd20b63dd2d117d968aaa227bc

led/Android.bp

@@ -0,0 +1,18 @@
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+cc_binary {
+    name: "dump_led",
+    srcs: ["dump_led.cpp"],
+    cflags: [
+        "-Wall",
+        "-Wextra",
+        "-Werror",
+    ],
+    shared_libs: [
+	"libdump",
+    ],
+    vendor: true,
+    relative_install_path: "dump",
+}

led/dump_led.cpp

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <dump/pixel_dump.h>
+
+int main() {
+    dumpFileContent("Green LED Brightness", "/sys/class/leds/green/brightness");
+    dumpFileContent("Green LED Max Brightness", "/sys/class/leds/green/max_brightness");
+    dumpFileContent("LED Calibration Data", "/mnt/vendor/persist/led/led_calibration_LUT.txt");
+    return 0;
+}

led/led.mk

@@ -0,0 +1,3 @@
+BOARD_VENDOR_SEPOLICY_DIRS += device/google/gs-common/led/sepolicy
+
+PRODUCT_PACKAGES_DEBUG += dump_led

led/sepolicy/dump_led.te

@@ -0,0 +1,9 @@
+pixel_bugreport(dump_led)
+
+allow dump_led mnt_vendor_file:dir search;
+allow dump_led persist_file:dir search;
+allow dump_led persist_leds_file:dir search;
+allow dump_led persist_leds_file:file r_file_perms;
+allow dump_led sysfs_leds:dir search;
+allow dump_led sysfs_leds:file r_file_perms;
+

led/sepolicy/file.te

@@ -0,0 +1,2 @@
+type persist_leds_file, file_type, vendor_persist_type;
+

led/sepolicy/file_contexts

@@ -0,0 +1,4 @@
+/vendor/bin/dump/dump_led      u:object_r:dump_led_exec:s0
+
+/mnt/vendor/persist/led(/.*)?  u:object_r:persist_leds_file:s0
+