Add hwprops to set serial number

hwprops on early init take /proc/cpuinfo Serial number
and export it to /default.prop ro.serialno property

betelgeuse.mk

@@ -139,7 +139,8 @@ PRODUCT_COPY_FILES += \
 
 PRODUCT_PACKAGES := \
     make_ext4fs \
-    com.android.future.usb.accessory
+    com.android.future.usb.accessory \
+    hwprops
 
 PRODUCT_PROPERTY_OVERRIDES := \
     ro.opengles.version=131072 \

hwprops/Android.mk

@@ -0,0 +1,32 @@
+# Copyright (C) 2010 Ricardo Cerqueira
+#
+# 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.
+
+
+
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_SRC_FILES := hwprops.c
+
+LOCAL_PRELINK_MODULE := false
+LOCAL_MODULE_PATH := $(TARGET_ROOT_OUT_SBIN)
+LOCAL_STATIC_LIBRARIES := libcutils libc
+
+LOCAL_MODULE := hwprops
+LOCAL_FORCE_STATIC_EXECUTABLE := true
+
+include $(BUILD_EXECUTABLE)
+

hwprops/hwprops.c

@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2011 The CyanogenMod 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 <string.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <sys/mount.h>
+
+/* Set serialnumber properties on star devices, since they're
+ * not exported by the bootloader to cmdline as expected */
+
+
+/* Ugly hack is ugly...
+ *
+ * There's a very narrow window in which the hardware properties
+ * can be written, since init sets them immediately after launching
+ * the property service, and they can only be set once.
+ * So our only chance to overwrite them is to set them during that 
+ * launch, by inserting them into default.prop */
+
+int main() {
+	FILE *fp;
+	char buf[256];
+	char serial[32];
+
+	if ((fp = fopen("/proc/cpuinfo", "r")) == NULL)
+		return 0;
+
+	while(fgets(buf, 256, fp) != NULL) {
+		if (strstr(buf, "Serial") != NULL) {
+			strtok(buf, ":");
+			strncpy(serial, strtok(NULL, " "), 32);
+		}
+	}
+	fclose(fp);
+
+	if (serial == NULL) 
+		return 0;
+
+	mount("rootfs", "/", "rootfs", MS_REMOUNT|0, NULL);
+
+	if ((fp = fopen("/default.prop", "a")) == NULL) 
+		return 0;
+	sprintf(buf, "ro.serialno=%s", serial);
+	fputs(buf, fp);
+	fclose(fp);
+
+	//mount("rootfs","/","rootfs",MS_REMOUNT|MS_RDONLY,NULL);        
+
+	return 0;
+}

init.betelgeuse.rc

@@ -1,6 +1,8 @@
 import init.nv_dev_board.usb.rc
 
 on early-init
+    start hwprops
+
     mount debugfs debugfs /sys/kernel/debug
 
     export EXTERNAL_STORAGE /mnt/sdcard
@@ -140,6 +142,10 @@ service tf_daemon /system/bin/tf_daemon -storageDir /data/tf
     group shell
     oneshot
 
+service hwprops /sbin/hwprops
+    disabled
+    oneshot
+
 #Create data directory and start service
 on property:tf.enable=y
     mkdir /data/tf