MagiskOnWSALocal/scripts/init.lsp.cust.rc

on post-fs
    mkdir /mnt/cust 0775 system system
    mount erofs loop@${MAGISKTMP}/cust.img /mnt/cust noatime,ro cache_strategy=readaround
    wait /system_ext
    mount overlay system_ext_etc_permissions_overlay /system_ext/etc/permissions noatime lowerdir=/system_ext/etc/permissions:/mnt/cust/system_ext/etc/permissions,redirect_dir=on,xino=on
    mount overlay system_ext_priv-app_overlay /system_ext/priv-app noatime lowerdir=/system_ext/priv-app:/mnt/cust/system_ext/priv-app,redirect_dir=on,xino=on
    wait /product
    mount overlay product_overlay /product noatime lowerdir=/product:/mnt/cust/product,redirect_dir=on,xino=on
    wait /vendor
    mount overlay vendor_overlay /vendor noatime lowerdir=/vendor:/mnt/cust/vendor,redirect_dir=on,xino=on
    wait /system
    mount overlay system_priv-app_overlay /system/priv-app noatime lowerdir=/mnt/cust/system/priv-app:/system/priv-app,redirect_dir=on,xino=on