mirror of
https://github.com/topjohnwu/Magisk.git
synced 2024-11-24 02:25:28 +00:00
234 lines
7.3 KiB
Bash
234 lines
7.3 KiB
Bash
#!/system/bin/sh
|
|
##########################################################################################
|
|
#
|
|
# Magisk Boot Image Patcher
|
|
# by topjohnwu
|
|
#
|
|
# This script should be placed in a directory with 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 the ramdisk for Magisk support
|
|
# init.magisk.rc script A new line will be added to init.rc to import this script.
|
|
# All magisk entrypoints are defined here
|
|
# chromeos folder This folder should store all the utilities and keys to sign
|
|
# (optional) a chromeos device, used in the tablet Pixel C
|
|
#
|
|
# 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
|
|
#
|
|
##########################################################################################
|
|
##########################################################################################
|
|
# Functions
|
|
##########################################################################################
|
|
|
|
# Pure bash dirname implementation
|
|
dirname_wrap() {
|
|
case "$1" in
|
|
*/*)
|
|
dir=${1%/*}
|
|
[ -z $dir ] && echo "/" || echo $dir
|
|
;;
|
|
*)
|
|
echo "."
|
|
;;
|
|
esac
|
|
}
|
|
|
|
# Pure bash basename implementation
|
|
basename_wrap() {
|
|
echo ${1##*/}
|
|
}
|
|
|
|
# --cpio-add <incpio> <mode> <entry> <infile>
|
|
cpio_add() {
|
|
./magiskboot --cpio-add ramdisk.cpio $1 $2 $3
|
|
}
|
|
|
|
# --cpio-extract <incpio> <entry> <outfile>
|
|
cpio_extract() {
|
|
./magiskboot --cpio-extract ramdisk.cpio $1 $2
|
|
}
|
|
|
|
# --cpio-mkdir <incpio> <mode> <entry>
|
|
cpio_mkdir() {
|
|
./magiskboot --cpio-mkdir ramdisk.cpio $1 $2
|
|
}
|
|
|
|
##########################################################################################
|
|
# Initialization
|
|
##########################################################################################
|
|
|
|
BOOTIMAGE="$1"
|
|
|
|
[ -e "$BOOTIMAGE" ] || (echo "$BOOTIMAGE does not exist!" && exit 1)
|
|
|
|
# Presets
|
|
[ -z $KEEPVERITY ] && KEEPVERITY=false
|
|
[ -z $KEEPFORCEENCRYPT ] && KEEPFORCEENCRYPT=false
|
|
|
|
# Detect whether running as root
|
|
id | grep "uid=0" >/dev/null 2>&1 && ROOT=true || ROOT=false
|
|
|
|
if [ -z $SOURCEDMODE ]; then
|
|
# Switch to the location of the script file
|
|
cd "`dirname_wrap "${BASH_SOURCE:-$0}"`"
|
|
# Load utility functions
|
|
. ./util_functions.sh
|
|
# Detect current status
|
|
mount_partitions
|
|
fi
|
|
|
|
chmod -R 755 .
|
|
|
|
##########################################################################################
|
|
# Unpack
|
|
##########################################################################################
|
|
|
|
migrate_boot_backup
|
|
|
|
CHROMEOS=false
|
|
|
|
ui_print "- Unpacking boot image"
|
|
./magiskboot --unpack "$BOOTIMAGE"
|
|
|
|
case $? in
|
|
1 )
|
|
abort "! Unable to unpack boot image"
|
|
;;
|
|
2 )
|
|
CHROMEOS=true
|
|
;;
|
|
3 )
|
|
ui_print "! Sony ELF32 format detected"
|
|
abort "! Please use BootBridge from @AdrianDC to flash Magisk"
|
|
;;
|
|
4 )
|
|
ui_print "! Sony ELF64 format detected"
|
|
abort "! Stock kernel cannot be patched, please use a custom kernel"
|
|
esac
|
|
|
|
##########################################################################################
|
|
# Ramdisk restores
|
|
##########################################################################################
|
|
|
|
# Test patch status and do restore, after this section, ramdisk.cpio.orig is guaranteed to exist
|
|
ui_print "- Checking ramdisk status"
|
|
./magiskboot --cpio-test ramdisk.cpio
|
|
case $? in
|
|
0 ) # Stock boot
|
|
ui_print "- Stock boot image detected!"
|
|
ui_print "- Backing up stock boot image"
|
|
SHA1=`./magiskboot --sha1 "$BOOTIMAGE" 2>/dev/null`
|
|
STOCKDUMP=stock_boot_${SHA1}.img
|
|
dd if="$BOOTIMAGE" of=$STOCKDUMP
|
|
./magiskboot --compress $STOCKDUMP
|
|
cp -af ramdisk.cpio ramdisk.cpio.orig
|
|
;;
|
|
1 ) # Magisk patched
|
|
ui_print "- Magisk patched image detected!"
|
|
# Find SHA1 of stock boot image
|
|
[ -z $SHA1 ] && SHA1=`./magiskboot --cpio-stocksha1 ramdisk.cpio 2>/dev/null`
|
|
OK=false
|
|
./magiskboot --cpio-restore ramdisk.cpio
|
|
if [ $? -eq 0 ]; then
|
|
ui_print "- Ramdisk restored from internal backup"
|
|
OK=true
|
|
else
|
|
# Restore failed
|
|
ui_print "! 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 "- Stock boot image backup found"
|
|
./magiskboot --decompress ${STOCKDUMP}.gz stock_boot.img
|
|
./magiskboot --unpack stock_boot.img
|
|
rm -f stock_boot.img
|
|
OK=true
|
|
fi
|
|
fi
|
|
fi
|
|
if ! $OK; then
|
|
ui_print "! Ramdisk restoration incomplete"
|
|
ui_print "! Will still try to continue installation"
|
|
fi
|
|
cp -af ramdisk.cpio ramdisk.cpio.orig
|
|
;;
|
|
2 ) # Other patched
|
|
ui_print "! Boot image patched by other programs!"
|
|
abort "! Please restore stock boot image"
|
|
;;
|
|
esac
|
|
|
|
##########################################################################################
|
|
# Ramdisk patches
|
|
##########################################################################################
|
|
|
|
ui_print "- Patching ramdisk"
|
|
|
|
if [ ! -z $SHA1 ]; then
|
|
cp init.magisk.rc init.magisk.rc.bak
|
|
echo "# STOCKSHA1=$SHA1" >> init.magisk.rc
|
|
fi
|
|
|
|
if $SKIP_INITRAMFS; then
|
|
cpio_add 750 init magiskinit
|
|
cpio_mkdir 000 overlay
|
|
cpio_add 750 overlay/init.magisk.rc init.magisk.rc
|
|
cpio_mkdir 750 overlay/sbin
|
|
cpio_add 755 overlay/sbin/magisk magisk
|
|
else
|
|
./magiskboot --cpio-patch ramdisk.cpio $KEEPVERITY $KEEPFORCEENCRYPT
|
|
|
|
cpio_extract sepolicy sepolicy
|
|
./magisk magiskpolicy --load sepolicy --save sepolicy --minimal
|
|
cpio_add 644 sepolicy sepolicy
|
|
rm -f sepolicy
|
|
|
|
cpio_add 750 init.magisk.rc init.magisk.rc
|
|
cpio_add 755 sbin/magisk magisk
|
|
fi
|
|
|
|
mv init.magisk.rc.bak init.magisk.rc 2>/dev/null
|
|
|
|
# Create ramdisk backups
|
|
./magiskboot --cpio-backup ramdisk.cpio ramdisk.cpio.orig
|
|
|
|
if ! $KEEPVERITY && [ -f dtb ]; then
|
|
./magiskboot --dtb-patch dtb && ui_print "- Patching fstab in dtb to remove dm-verity"
|
|
fi
|
|
|
|
rm -f ramdisk.cpio.orig
|
|
|
|
##########################################################################################
|
|
# Repack and flash
|
|
##########################################################################################
|
|
|
|
# Hexpatches
|
|
|
|
# Remove Samsung RKP in stock kernel
|
|
./magiskboot --hexpatch kernel \
|
|
49010054011440B93FA00F71E9000054010840B93FA00F7189000054001840B91FA00F7188010054 \
|
|
A1020054011440B93FA00F7140020054010840B93FA00F71E0010054001840B91FA00F7181010054
|
|
|
|
# skip_initramfs -> want_initramfs
|
|
$SKIP_INITRAMFS && ./magiskboot --hexpatch kernel \
|
|
736B69705F696E697472616D6673 \
|
|
77616E745F696E697472616D6673
|
|
|
|
ui_print "- Repacking boot image"
|
|
./magiskboot --repack "$BOOTIMAGE" || abort "! Unable to repack boot image!"
|
|
|
|
# Sign chromeos boot
|
|
$CHROMEOS && sign_chromeos
|
|
|
|
./magiskboot --cleanup
|