dre: init: Set model based on project codename

Co-authored-by: dianlujitao <dianlujitao@lineageos.org>
Change-Id: I06f9acda3fe77f57a1bc24ee5a802db0ab3b8d60

BoardConfig.mk

@@ -93,6 +93,9 @@ DEVICE_MATRIX_FILE := $(DEVICE_PATH)/compatibility_matrix.xml
 DEVICE_MANIFEST_FILE := $(DEVICE_PATH)/manifest.xml
 ODM_MANIFEST_FILES := $(DEVICE_PATH)/manifest_odm.xml
 
+# Init
+TARGET_INIT_VENDOR_LIB := //$(DEVICE_PATH):libinit_oplus
+
 # Kernel
 BOARD_BOOT_HEADER_VERSION := 3
 BOARD_KERNEL_BASE := 0x00000000

init/Android.bp

@@ -3,6 +3,13 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
+cc_library_static {
+    name: "libinit_oplus",
+    recovery_available: true,
+    shared_libs: ["libbase"],
+    srcs: ["init_oplus.cpp"],
+}
+
 prebuilt_etc {
     name: "fstab.qcom",
     src: "fstab.qcom",

init/init_oplus.cpp

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2022 The LineageOS Project
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <android-base/logging.h>
+#include <android-base/properties.h>
+
+#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
+#include <sys/_system_properties.h>
+
+using android::base::GetProperty;
+
+/*
+ * SetProperty does not allow updating read only properties and as a result
+ * does not work for our use case. Write "OverrideProperty" to do practically
+ * the same thing as "SetProperty" without this restriction.
+ */
+void OverrideProperty(const char* name, const char* value) {
+    size_t valuelen = strlen(value);
+
+    prop_info* pi = (prop_info*)__system_property_find(name);
+    if (pi != nullptr) {
+        __system_property_update(pi, value, valuelen);
+    } else {
+        __system_property_add(name, strlen(name), value, valuelen);
+    }
+}
+
+/*
+ * Only for read-only properties. Properties that can be wrote to more
+ * than once should be set in a typical init script (e.g. init.oplus.hw.rc)
+ * after the original property has been set.
+ */
+void vendor_load_properties() {
+    //auto device = GetProperty("ro.product.product.device", "");
+    auto prj_codename = GetProperty("ro.boot.project_codename", "");
+
+    if (prj_codename == "dre9") // Unlocked
+        OverrideProperty("ro.product.product.model", "DE2117");
+    else { // T-Mobile (dre8t) or Metro by T-Mobile (dre8m)
+        OverrideProperty("ro.product.product.model", "DE2118");
+        OverrideProperty("ro.product.product.device", "OnePlusN200TMO");
+        OverrideProperty("ro.product.product.name", "OnePlusN200TMO");
+    }
+}