Magisk/scripts/avd_patch.sh

#####################################################################
#   AVD MagiskInit Setup
#####################################################################
#
# Support API level: 23 - 33
#
# With an emulator booted and accessible via ADB, usage:
# ./build.py avd_patch path/to/booted/avd-image/ramdisk.img
#
# The purpose of this script is to patch AVD ramdisk.img and do a
# full integration test of magiskinit under several circumstances.
# After patching ramdisk.img, close the emulator, then select
# "Cold Boot Now" in AVD Manager to force a full reboot.
#
#####################################################################
# AVD Init Configurations:
#
# rootfs w/o early mount: API 23 - 25
# rootfs with early mount: API 26 - 27
# Legacy system-as-root: API 28
# 2 stage init: API 29 - 33
#####################################################################

if [ ! -f /system/build.prop ]; then
  # Running on PC
  echo 'Please run `./build.py avd_patch` instead of directly executing the script!'
  exit 1
fi

cd /data/local/tmp
chmod 755 busybox

if [ -z "$FIRST_STAGE" ]; then
  export FIRST_STAGE=1
  export ASH_STANDALONE=1
  # Re-exec script with busybox
  exec ./busybox sh $0
fi

# Extract files from APK
unzip -oj magisk.apk 'assets/util_functions.sh' 'assets/stub.apk'
. ./util_functions.sh

api_level_arch_detect

unzip -oj magisk.apk "lib/$ABI/*" "lib/$ABI32/libmagisk32.so" -x "lib/$ABI/libbusybox.so"
for file in lib*.so; do
  chmod 755 $file
  mv "$file" "${file:3:${#file}-6}"
done

./magiskboot decompress ramdisk.cpio.tmp ramdisk.cpio
cp ramdisk.cpio ramdisk.cpio.orig

export KEEPVERITY=true
export KEEPFORCEENCRYPT=true

echo "KEEPVERITY=$KEEPVERITY" > config
echo "KEEPFORCEENCRYPT=$KEEPFORCEENCRYPT" >> config
if [ -e "/system/bin/linker64" ]; then
  echo "PREINITDEVICE=$(./magisk64 --preinit-device)" >> config
else
  echo "PREINITDEVICE=$(./magisk32 --preinit-device)" >> config
fi
# For API 28, we also patch advancedFeatures.ini to disable SAR
# Manually override skip_initramfs by setting RECOVERYMODE=true
[ $API = "28" ] && echo 'RECOVERYMODE=true' >> config
RANDOMSEED=$(tr -dc 'a-f0-9' < /dev/urandom | head -c 16)
echo "RANDOMSEED=0x$RANDOMSEED" >> config
cat config

./magiskboot compress=xz magisk32 magisk32.xz
./magiskboot compress=xz magisk64 magisk64.xz
./magiskboot compress=xz stub.apk stub.xz

./magiskboot cpio ramdisk.cpio \
"add 0750 init magiskinit" \
"mkdir 0750 overlay.d" \
"mkdir 0750 overlay.d/sbin" \
"add 0644 overlay.d/sbin/magisk32.xz magisk32.xz" \
"add 0644 overlay.d/sbin/magisk64.xz magisk64.xz" \
"add 0644 overlay.d/sbin/stub.xz stub.xz" \
"patch" \
"backup ramdisk.cpio.orig" \
"mkdir 000 .backup" \
"add 000 .backup/.magisk config"

rm -f ramdisk.cpio.orig config magisk*.xz stub.xz
./magiskboot compress=gzip ramdisk.cpio ramdisk.cpio.gz