#!/system/bin/sh ########################################################################################## # # Magisk Boot Image Patcher # by topjohnwu # # This script should be placed in a directory with at least the following files: # # File name type Description # # boot_patch.sh script A script to patch boot. Expect path to boot image as parameter. # (this file) The script will use binaries and files in its same directory # to complete the patching process # magisk binary The main binary for all Magisk operations. # It is also used to patch the sepolicy in the ramdisk. # magiskboot binary A tool to unpack boot image, decompress ramdisk, extract ramdisk # and patch common patches such as forceencrypt, remove dm-verity. # init.magisk.rc script A new line will be added to init.rc to import this script. # All magisk entrypoints are defined here # # If the script is not running as root, then the input boot image should be a stock image # or have a backup included in ramdisk internally, since we cannot access the stock boot # image placed under /data we've created when previously installing # ########################################################################################## CWD=`pwd` cd `dirname $1` BOOTIMAGE="`pwd`/`basename $1`" cd "$CWD" if [ -z $BOOTIMAGE ]; then ui_print_wrap "This script requires a boot image as a parameter" exit 1 fi # Presets [ -z $KEEPVERITY ] && KEEPVERITY=false [ -z $KEEPFORCEENCRYPT ] && KEEPFORCEENCRYPT=false # Detect whether running as root [ `id -u` -eq 0 ] && ROOT=true || ROOT=false # Call ui_print_wrap if exists, or else simply use echo # Useful when wrapped in flashable zip ui_print_wrap() { type ui_print >/dev/null 2>&1 && ui_print "$1" || echo "$1" } grep_prop() { REGEX="s/^$1=//p" shift FILES=$@ if [ -z "$FILES" ]; then FILES='/system/build.prop' fi cat $FILES 2>/dev/null | sed -n "$REGEX" | head -n 1 } # --cpio-add cpio_add() { LD_LIBRARY_PATH=$SYSTEMLIB ./magiskboot --cpio-add ramdisk.cpio $1 $2 $3 } # --cpio-extract cpio_extract() { LD_LIBRARY_PATH=$SYSTEMLIB ./magiskboot --cpio-extract ramdisk.cpio $1 $2 } # --cpio-mkdir cpio_mkdir() { LD_LIBRARY_PATH=$SYSTEMLIB ./magiskboot --cpio-mkdir ramdisk.cpio $1 $2 } ########################################################################################## # Prework ########################################################################################## # Switch to the location of the script file [ -z $SOURCEDMODE ] && cd "`dirname "${BASH_SOURCE:-$0}"`" chmod +x ./* # Detect ARCH [ -d /system/lib64 ] && SYSTEMLIB=/system/lib64 || SYSTEMLIB=/system/lib ui_print_wrap "- Unpacking boot image" LD_LIBRARY_PATH=$SYSTEMLIB ./magiskboot --unpack $BOOTIMAGE case $? in 1 ) ui_print_wrap "! Unable to unpack boot image" exit 1 ;; 2 ) ui_print_wrap "! Sony ELF32 format detected" ui_print_wrap "! Please use BootBridge from @AdrianDC to flash Magisk" exit 1 ;; 3 ) ui_print_wrap "! Sony ELF64 format detected" ui_print_wrap "! Stock kernel cannot be patched, please use a custom kernel" exit 1 esac ########################################################################################## # Ramdisk restores ########################################################################################## # Test patch status and do restore, after this section, ramdisk.cpio.orig is guaranteed to exist ui_print_wrap "- Checking ramdisk status" LD_LIBRARY_PATH=$SYSTEMLIB ./magiskboot --cpio-test ramdisk.cpio case $? in 0 ) # Stock boot ui_print_wrap "- Stock boot image detected!" ui_print_wrap "- Backing up stock boot image" SHA1=`LD_LIBRARY_PATH=$SYSTEMLIB ./magiskboot --sha1 $BOOTIMAGE | tail -n 1` STOCKDUMP=stock_boot_${SHA1}.img dd if=$BOOTIMAGE of=$STOCKDUMP LD_LIBRARY_PATH=$SYSTEMLIB ./magiskboot --compress $STOCKDUMP cp -af ramdisk.cpio ramdisk.cpio.orig ;; 1 ) # Magisk patched ui_print_wrap "- Magisk patched image detected!" # Find SHA1 of stock boot image if [ -z $SHA1 ]; then LD_LIBRARY_PATH=$SYSTEMLIB ./magiskboot --cpio-extract ramdisk.cpio init.magisk.rc init.magisk.rc.old SHA1=`grep_prop "# STOCKSHA1" init.magisk.rc.old` rm -f init.magisk.rc.old fi OK=false LD_LIBRARY_PATH=$SYSTEMLIB ./magiskboot --cpio-restore ramdisk.cpio if [ $? -eq 0 ]; then ui_print_wrap "- Ramdisk restored from internal backup" OK=true else # Restore failed ui_print_wrap "! Cannot restore from internal backup" # If we are root and SHA1 known, we try to find the stock backup if $ROOT && [ ! -z $SHA1 ]; then STOCKDUMP=/data/stock_boot_${SHA1}.img if [ -f ${STOCKDUMP}.gz ]; then ui_print_wrap "- Stock boot image backup found" LD_LIBRARY_PATH=$SYSTEMLIB ./magiskboot --decompress ${STOCKDUMP}.gz stock_boot.img LD_LIBRARY_PATH=$SYSTEMLIB ./magiskboot --unpack stock_boot.img rm -f stock_boot.img OK=true fi fi fi if ! $OK; then ui_print_wrap "! Ramdisk restoration incomplete" ui_print_wrap "! Will still try to continue installation" fi cp -af ramdisk.cpio ramdisk.cpio.orig ;; 2 ) # Other patched ui_print_wrap "! Other patched boot detected!" ui_print_wrap "! Please restore stock boot image" exit 1 ;; esac ########################################################################################## # Ramdisk patches ########################################################################################## ui_print_wrap "- Patching ramdisk" # The common patches $KEEPVERITY || LD_LIBRARY_PATH=$SYSTEMLIB ./magiskboot --cpio-patch-dmverity ramdisk.cpio $KEEPFORCEENCRYPT || LD_LIBRARY_PATH=$SYSTEMLIB ./magiskboot --cpio-patch-forceencrypt ramdisk.cpio # Add magisk entrypoint cpio_extract init.rc init.rc grep "import /init.magisk.rc" init.rc >/dev/null || sed -i '1,/.*import.*/s/.*import.*/import \/init.magisk.rc\n&/' init.rc sed -i "/selinux.reload_policy/d" init.rc cpio_add 750 init.rc init.rc rm -f init.rc # sepolicy patches cpio_extract sepolicy sepolicy LD_LIBRARY_PATH=$SYSTEMLIB ./magisk magiskpolicy --load sepolicy --save sepolicy --minimal cpio_add 644 sepolicy sepolicy rm -f sepolicy # Add new items if [ ! -z $SHA1 ]; then cp init.magisk.rc init.magisk.rc.bak echo "# STOCKSHA1=$SHA1" >> init.magisk.rc fi cpio_add 750 init.magisk.rc init.magisk.rc [ -f init.magisk.rc.bak ] && mv init.magisk.rc.bak init.magisk.rc cpio_add 755 sbin/magisk magisk # Create ramdisk backups LD_LIBRARY_PATH=$SYSTEMLIB ./magiskboot --cpio-backup ramdisk.cpio ramdisk.cpio.orig rm -f ramdisk.cpio.orig ########################################################################################## # Repack and flash ########################################################################################## # Hexpatches # Remove Samsung RKP in stock kernel LD_LIBRARY_PATH=$SYSTEMLIB ./magiskboot --hexpatch kernel \ 49010054011440B93FA00F71E9000054010840B93FA00F7189000054001840B91FA00F7188010054 \ A1020054011440B93FA00F7140020054010840B93FA00F71E0010054001840B91FA00F7181010054 ui_print_wrap "- Repacking boot image" LD_LIBRARY_PATH=$SYSTEMLIB ./magiskboot --repack $BOOTIMAGE if [ $? -ne 0 ]; then ui_print_wrap "! Unable to repack boot image!" exit 1 fi LD_LIBRARY_PATH=$SYSTEMLIB ./magiskboot --cleanup