AK3+Backend: add preliminary KernelSU support

META-INF/com/google/android/update-binary

@@ -393,8 +393,8 @@ do_modules() {
   local block modcon moddir modtarget module slot umask;
   if [ "$(file_getprop anykernel.sh do.systemless)" == 1 ]; then
     cd $AKHOME/modules;
-    ui_print " " "Creating kernel helper Magisk module...";
-    if [ -d /data/adb/magisk -a -f $AKHOME/magisk_patched ]; then
+    ui_print " " "Creating kernel helper systemless module...";
+    if [ -d /data/adb/magisk -a -f $AKHOME/magisk_patched ] || [ -d /data/adb/ksu -a -f $AKHOME/kernelsu_patched ]; then
       umask=$(umask);
       umask 022;
       moddir=/data/adb/modules/ak3-helper;
@@ -408,7 +408,7 @@ do_modules() {
       cp -f $AKHOME/vertmp $moddir/version;
       umask $umask;
     else
-      ui_print "Magisk installation not found. Skipped!";
+      ui_print "Magisk/KernelSU installation not found. Skipped!";
     fi;
   else
     cd $AKHOME/modules;

META-INF/com/google/android/updater-script

@@ -3,4 +3,4 @@
 # Dummy file; update-binary is a shell script (DO NOT CHANGE)
 #
 #
-# AK_BASE_VERSION=20230605
+# AK_BASE_VERSION=20230704

tools/ak3-core.sh

@@ -345,6 +345,28 @@ flash_boot() {
           for fdt in dtb extra kernel_dtb recovery_dtbo; do
             [ -f $fdt ] && $bin/magiskboot dtb $fdt patch; # remove dtb verity/avb
           done;
+        elif [ -d /data/adb/ksu -a -f /data/adb/ksu/modules.img ] && [ "$(file_getprop $home/anykernel.sh do.systemless)" == 1 ]; then
+          ui_print " " "KernelSU detected! Setting up for kernel helper module...";
+          comp=$($bin/magiskboot decompress kernel 2>&1 | grep -vE 'raw|zimage' | sed -n 's;.*\[\(.*\)\];\1;p');
+          ($bin/magiskboot split $kernel || $bin/magiskboot decompress $kernel kernel) 2>/dev/null;
+          if [ $? != 0 -a "$comp" ] && $comp --help 2>/dev/null; then
+            echo "Attempting kernel unpack with busybox $comp..." >&2;
+            $comp -dc $kernel > kernel;
+          fi;
+          if strings kernel 2>/dev/null | grep -q -E '^/data/adb/ksud$'; then
+            touch $home/kernelsu_patched;
+            strings kernel 2>/dev/null | grep -E -m1 'Linux version.*#' > $home/vertmp;
+          else
+            ui_print " " "Warning: No KernelSU support detected in kernel!";
+          fi;
+          if [ "$comp" ]; then
+            $bin/magiskboot compress=$comp kernel kernel.$comp;
+            if [ $? != 0 ] && $comp --help 2>/dev/null; then
+              echo "Attempting kernel repack with busybox $comp..." >&2;
+              $comp -9c kernel > kernel.$comp;
+            fi;
+            mv -f kernel.$comp kernel;
+          fi;
         else
           case $kernel in
             *-dtb) rm -f kernel_dtb;;