[WIP] Edit android version/security patch based on boot.img

base.mk

@@ -44,7 +44,8 @@ PRODUCT_COPY_FILES += \
 	device/phh/treble/nfc/libnfc-nci.conf:system/etc/libnfc-nci.conf
 
 PRODUCT_COPY_FILES += \
-	device/phh/treble/resize-system.sh:system/bin/resize-system.sh
+	device/phh/treble/rw-system.sh:system/bin/rw-system.sh \
+	device/phh/treble/fixSPL/getSPL.arm:system/bin/getSPL
 
 PRODUCT_PACKAGES += \
 	treble-environ-rc

fixSPL/getSPL.c

@@ -0,0 +1,38 @@
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
+int main(int argc, char **argv) {
+	if(argc!=3) {
+		fprintf(stderr, "Usage: %s <bootimg> <android|spl>\n", argv[0]);
+		exit(-1);
+	}
+	int fd = open(argv[1], O_RDONLY);
+	lseek(fd, 11*4, SEEK_SET);
+	uint32_t val = 0;
+	read(fd, &val, sizeof(val));
+	int android = val >> 11;
+	int a = android >> 14;
+	int b = (android >> 7) & 0x7f;
+	int c = android & 0x7f;
+
+	int spl = val & 0x7ff;
+	int y = 2000 + (spl >> 4);
+	int m = spl & 0xf;
+
+	fprintf(stderr, "Android: %d.%d.%d\n", a, b, c);
+	fprintf(stderr, "SPL: %d-%d-01\n", y, m);
+
+	if(strcmp(argv[2], "android") == 0) {
+		printf("%d.%d.%d", a, b, c);
+	} else if(strcmp(argv[2], "spl") == 0) {
+		printf("%04d-%02d-%02d", y, m, 1);
+	}
+
+	return 0;
+}

resize-system.sh

@@ -1,11 +0,0 @@
-#!/system/bin/sh
-
-set -e
-
-if [ "grep ' /system ' /proc/mounts  |cut -d ' ' -f 1 |wc -l" -ne 1 ];then
-	exit 0
-fi
-
-mount -o remount,rw /system
-resize2fs $(grep ' /system ' /proc/mounts |cut -d ' ' -f 1)
-mount -o remount,ro /system

rw-system.sh

@@ -0,0 +1,35 @@
+#!/system/bin/sh
+
+set -e
+
+if [ "grep ' /system ' /proc/mounts  |cut -d ' ' -f 1 |wc -l" -ne 1 ];then
+	exit 0
+fi
+
+img="$(find /dev/block -type l |grep by-name |grep /kernel$(getprop ro.boot.slot_suffix) |head -n 1)"
+[ -z "$img" ] && img="$(find /dev/block -type l |grep by-name |grep /boot$(getprop ro.boot.slot_suffix) |head -n 1)"
+
+mount -o remount,rw /system
+resize2fs $(grep ' /system ' /proc/mounts |cut -d ' ' -f 1)
+if [ -n "$img" -a ! -f /system/rewrite-spl-done ];then
+	done=1
+	v="$(getSPL $img android)"
+	if [ "$(getprop ro.build.version.release)" != "$v" ];then\
+		sed -i -E "s/ro.build.version.release=.*/ro.build.version.release=$v/g" /system/build.prop
+		sed -i -E "s/ro.build.version.release=.*/ro.build.version.release=$v/g" /system/etc/prop.default
+		done=''
+	fi
+
+	v="$(getSPL $img spl)"
+	if [ "$(getprop ro.build.version.security_patch)" != "$v)" ];then
+		sed -i -E "s/ro.build.version.security_patch=.*/ro.build.version.security_patch=$v/g" /system/build.prop
+		sed -i -E "s/ro.build.version.security_patch=.*/ro.build.version.security_patch=$v/g" /system/etc/prop.default
+		done=''
+	fi
+	
+	if touch /system/rewrite-spl-done && [ ! "$done" ];then
+		mount -o remount,ro /system
+		reboot
+	fi
+fi
+mount -o remount,ro /system

sepolicy/file_contexts

@@ -1,4 +1,4 @@
 /system/bin/phh-su                   u:object_r:phhsu_exec:s0
 /system/bin/vndk-detect			u:object_r:vndk_detect_exec:s0
 /system/etc/usb_audio_policy_configuration.xml	u:object_r:vendor_configs_file:s0
-/system/bin/resize-system.sh u:object_r:update_engine_exec:s0
+/system/bin/rw-system.sh u:object_r:phhsu_exec:s0

sepolicy/resize.te

@@ -1,6 +0,0 @@
-allow update_engine { toolbox_exec system_file }:file rx_file_perms;
-allow update_engine labeledfs:filesystem remount;
-
-allow update_engine sysfs_fs_ext4_features:dir r_dir_perms;
-allow update_engine sysfs_fs_ext4_features:file r_file_perms;
-allow update_engine self:capability { sys_resource };

vndk.rc

@@ -1,5 +1,5 @@
 on post-fs
 	exec - root -- /system/bin/vndk-detect
-	exec - root -- /system/bin/resize-system.sh
+	exec - root -- /system/bin/rw-system.sh
 	mount none /system/etc/usb_audio_policy_configuration.xml /vendor/etc/usb_audio_policy_configuration.xml bind
 	export LD_CONFIG_FILE /system/etc/ld.config.${persist.sys.vndk}.txt