Another simple way to integrate Magisk into Android-x86 project (BlissOS, PrimeOS, ...)

1. In Android-x86 directory (which contain initrd.img, system.img, data, or data.img, ...), rename initrd.img to initrd_real.img and put initrd-magisk as initrd.img.
2. Download magisk apk and put it as magisk.apk in Android-88 directory.

Android x86 directory will be like this:

• ...
• data.img or data folder
• findme
• initrd.img (initrd-magisk)
• initrd_real.img (original initrd.img)
• install.img
• kernel
• magisk.apk
• ramdisk.img (if Android 9 and bellow)
• system.img
• ...

• System launched with initrd-magisk (initrd.img) unpacked into root directory in first stage, then unpack original initrd_real.img to root directory.
• Extract magisk.apk and put binaries into /magisk
• Put 99_magisk script into /scripts
• Launch init script from original initrd_real.img and continue to boot.

• Execute 99_magisk script to patch Android's root directory
  • On rootfs, directly add magisk binaries into /android/magisk and magisk services into init.rc
  • On system-as-root, mount tmpfs on /android/dev, mount overlayfs on /system/etc/init and add magisk binaries and magisk.rc.
  • Patch sepolicy file, dump it into /android/dev/.overlay/sepolicy and mount bind into /sepolicy or vendor precompiled sepolicy.
  • Unmount /android/dev
• init switch root to /android and execute /init to boot into Android.

• Android boot with Magisk

1. Prepare environment:

apt update; apt upgrade
pkg install git
pkg install cpio

2. Clone this repo by:

git clone http://github.com/huskydg/initrd-magisk

3. Change current directory to ~/initrd-magisk:

cd ~/initrd-magisk

4. Default is x86_64 (64bit)

cat <<EOF >bin/info.sh
IS64BIT=true
ABI=x86_64
ABI32=x86
EOF

If you want to build initrd-magisk for Android x86 (32bit):

cat <<EOF >bin/info.sh
IS64BIT=false
ABI=x86
ABI32=x86
EOF

5. Build with these command:

chmod -R 777 *; find * | cpio -o -H newc | gzip > ../initrd-magisk.img

• If you have rusty-magisk installed (BlissOS 14, PrimeOS 2.0 come with rusty-magisk installed), initrd-magisk will try to invalidate it. It's RECOMMENDED to remove it.
• If you update Android-x86 OTA, it might wipe out initrd.img so you will need to do again.