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GNU GENERAL PUBLIC LICENSE
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#!/system/bin/sh
#######################################################################################
# Magisk Boot Image Patcher
#######################################################################################
#
# Usage: boot_patch.sh <bootimage>
#
# The following flags can be set in environment variables:
# KEEPVERITY, KEEPFORCEENCRYPT, RECOVERYMODE
#
# 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 image for Magisk.
# (this file) The script will use files in its same
# directory to complete the patching process
# util_functions.sh script A script which hosts all functions required
# for this script to work properly
# magiskinit binary The binary to replace /init
# magisk(32/64) binary The magisk binaries
# magiskboot binary A tool to manipulate boot images
# chromeos folder This folder includes the utility and keys to sign
# (optional) chromeos boot images. Only used for Pixel C.
#
#######################################################################################
############
# Functions
############
# Pure bash dirname implementation
getdir() {
case "$1" in
*/*)
dir=${1%/*}
if [ -z $dir ]; then
echo "/"
else
echo $dir
fi
;;
*) echo "." ;;
esac
}
#################
# Initialization
#################
if [ -z $SOURCEDMODE ]; then
# Switch to the location of the script file
cd "$(getdir "${BASH_SOURCE:-$0}")"
# Load utility functions
. ./util_functions.sh
# Check if 64-bit
api_level_arch_detect
fi
BOOTIMAGE="$1"
[ -e "$BOOTIMAGE" ] || abort "$BOOTIMAGE does not exist!"
# Dump image for MTD/NAND character device boot partitions
if [ -c "$BOOTIMAGE" ]; then
nanddump -f boot.img "$BOOTIMAGE"
BOOTNAND="$BOOTIMAGE"
BOOTIMAGE=boot.img
fi
# Flags
[ -z $KEEPVERITY ] && KEEPVERITY=false
[ -z $KEEPFORCEENCRYPT ] && KEEPFORCEENCRYPT=false
[ -z $RECOVERYMODE ] && RECOVERYMODE=false
export KEEPVERITY
export KEEPFORCEENCRYPT
chmod -R 755 .
#########
# Unpack
#########
CHROMEOS=false
ui_print "- Unpacking boot image"
./magiskboot unpack "$BOOTIMAGE"
case $? in
0 ) ;;
1 )
abort "! Unsupported/Unknown image format"
;;
2 )
ui_print "- ChromeOS boot image detected"
CHROMEOS=true
;;
* )
abort "! Unable to unpack boot image"
;;
esac
[ -f recovery_dtbo ] && RECOVERYMODE=true
###################
# Ramdisk Restores
###################
# Test patch status and do restore
ui_print "- Checking ramdisk status"
if [ -e ramdisk.cpio ]; then
./magiskboot cpio ramdisk.cpio test
STATUS=$?
else
# Stock A only system-as-root
STATUS=0
fi
case $((STATUS & 3)) in
0 ) # Stock boot
ui_print "- Stock boot image detected"
SHA1=$(./magiskboot sha1 "$BOOTIMAGE" 2>/dev/null)
cat $BOOTIMAGE > stock_boot.img
cp -af ramdisk.cpio ramdisk.cpio.orig 2>/dev/null
;;
1 ) # Magisk patched
ui_print "- Magisk patched boot image detected"
# Find SHA1 of stock boot image
[ -z $SHA1 ] && SHA1=$(./magiskboot cpio ramdisk.cpio sha1 2>/dev/null)
./magiskboot cpio ramdisk.cpio restore
cp -af ramdisk.cpio ramdisk.cpio.orig
rm -f stock_boot.img
;;
2 ) # Unsupported
ui_print "! Boot image patched by unsupported programs"
abort "! Please restore back to stock boot image"
;;
esac
##################
# Ramdisk Patches
##################
ui_print "- Patching ramdisk"
echo "KEEPVERITY=$KEEPVERITY" > config
echo "KEEPFORCEENCRYPT=$KEEPFORCEENCRYPT" >> config
echo "RECOVERYMODE=$RECOVERYMODE" >> config
[ ! -z $SHA1 ] && echo "SHA1=$SHA1" >> config
# Compress to save precious ramdisk space
./magiskboot compress=xz magisk32 magisk32.xz
./magiskboot compress=xz magisk64 magisk64.xz
$IS64BIT && SKIP64="" || SKIP64="#"
./magiskboot cpio ramdisk.cpio \
"add 0750 init magiskinit" \
"mkdir 0750 overlay.d" \
"mkdir 0750 overlay.d/sbin" \
"add 0644 overlay.d/sbin/magisk32.xz magisk32.xz" \
"$SKIP64 add 0644 overlay.d/sbin/magisk64.xz magisk64.xz" \
"patch" \
"backup ramdisk.cpio.orig" \
"mkdir 000 .backup" \
"add 000 .backup/.magisk config"
rm -f ramdisk.cpio.orig config magisk*.xz
#################
# Binary Patches
#################
for dt in dtb kernel_dtb extra; do
[ -f $dt ] && ./magiskboot dtb $dt patch && ui_print "- Patch fstab in $dt"
done
if [ -f kernel ]; then
# Remove Samsung RKP
./magiskboot hexpatch kernel \
49010054011440B93FA00F71E9000054010840B93FA00F7189000054001840B91FA00F7188010054 \
A1020054011440B93FA00F7140020054010840B93FA00F71E0010054001840B91FA00F7181010054
# Remove Samsung defex
# Before: [mov w2, #-221] (-__NR_execve)
# After: [mov w2, #-32768]
./magiskboot hexpatch kernel 821B8012 E2FF8F12
# Force kernel to load rootfs
# skip_initramfs -> want_initramfs
./magiskboot hexpatch kernel \
736B69705F696E697472616D667300 \
77616E745F696E697472616D667300
fi
#################
# Repack & Flash
#################
ui_print "- Repacking boot image"
./magiskboot repack "$BOOTIMAGE" || abort "! Unable to repack boot image"
# Sign chromeos boot
$CHROMEOS && sign_chromeos
# Restore the original boot partition path
[ -e "$BOOTNAND" ] && BOOTIMAGE="$BOOTNAND"
# Reset any error code
true

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############################################
# Magisk General Utility Functions
############################################
MAGISK_VER='23.0'
MAGISK_VER_CODE=23000
###################
# Helper Functions
###################
ui_print() {
echo "$1"
}
toupper() {
echo "$@" | tr '[:lower:]' '[:upper:]'
}
grep_cmdline() {
local REGEX="s/^$1=//p"
cat /proc/cmdline | tr '[:space:]' '\n' | sed -n "$REGEX" 2>/dev/null
}
grep_prop() {
local REGEX="s/^$1=//p"
shift
local FILES=$@
[ -z "$FILES" ] && FILES='/system/build.prop'
cat $FILES 2>/dev/null | dos2unix | sed -n "$REGEX" | head -n 1
}
grep_get_prop() {
local result=$(grep_prop $@)
if [ -z "$result" ]; then
# Fallback to getprop
adb shell getprop "$1"
else
echo $result
fi
}
getvar() {
local VARNAME=$1
local VALUE
local PROPPATH='/data/.magisk /cache/.magisk'
[ ! -z $MAGISKTMP ] && PROPPATH="$MAGISKTMP/config $PROPPATH"
VALUE=$(grep_prop $VARNAME $PROPPATH)
[ ! -z $VALUE ] && eval $VARNAME=\$VALUE
}
is_mounted() {
grep -q " $(readlink -f $1) " /proc/mounts 2>/dev/null
return $?
}
abort() {
ui_print "$1"
$BOOTMODE || recovery_cleanup
[ ! -z $MODPATH ] && rm -rf $MODPATH
rm -rf $TMPDIR
exit 1
}
resolve_vars() {
MAGISKBIN=$NVBASE/magisk
POSTFSDATAD=$NVBASE/post-fs-data.d
SERVICED=$NVBASE/service.d
}
print_title() {
local len line1len line2len pounds
line1len=$(echo -n $1 | wc -c)
line2len=$(echo -n $2 | wc -c)
len=$line2len
[ $line1len -gt $line2len ] && len=$line1len
len=$((len + 2))
pounds=$(printf "%${len}s" | tr ' ' '*')
ui_print "$pounds"
ui_print " $1 "
[ "$2" ] && ui_print " $2 "
ui_print "$pounds"
}
######################
# Environment Related
######################
setup_flashable() {
ensure_bb
$BOOTMODE && return
if [ -z $OUTFD ] || readlink /proc/$$/fd/$OUTFD | grep -q /tmp; then
# We will have to manually find out OUTFD
for FD in `ls /proc/$$/fd`; do
if readlink /proc/$$/fd/$FD | grep -q pipe; then
if ps | grep -v grep | grep -qE " 3 $FD |status_fd=$FD"; then
OUTFD=$FD
break
fi
fi
done
fi
recovery_actions
}
ensure_bb() {
if set -o | grep -q standalone; then
# We are definitely in busybox ash
set -o standalone
return
fi
# Find our busybox binary
local bb
if [ -f $TMPDIR/busybox ]; then
bb=$TMPDIR/busybox
elif [ -f $MAGISKBIN/busybox ]; then
bb=$MAGISKBIN/busybox
else
abort "! Cannot find BusyBox"
fi
chmod 755 $bb
# Busybox could be a script, make sure /system/bin/sh exists
if [ ! -f /system/bin/sh ]; then
umount -l /system 2>/dev/null
mkdir -p /system/bin
ln -s $(command -v sh) /system/bin/sh
fi
export ASH_STANDALONE=1
# Find our current arguments
# Run in busybox environment to ensure consistent results
# /proc/<pid>/cmdline shall be <interpreter> <script> <arguments...>
local cmds="$($bb sh -c "
for arg in \$(tr '\0' '\n' < /proc/$$/cmdline); do
if [ -z \"\$cmds\" ]; then
# Skip the first argument as we want to change the interpreter
cmds=\"sh\"
else
cmds=\"\$cmds '\$arg'\"
fi
done
echo \$cmds")"
# Re-exec our script
echo $cmds | $bb xargs $bb
exit
}
recovery_actions() {
# Make sure random won't get blocked
mount -o bind /dev/urandom /dev/random
# Unset library paths
OLD_LD_LIB=$LD_LIBRARY_PATH
OLD_LD_PRE=$LD_PRELOAD
OLD_LD_CFG=$LD_CONFIG_FILE
unset LD_LIBRARY_PATH
unset LD_PRELOAD
unset LD_CONFIG_FILE
}
recovery_cleanup() {
local DIR
ui_print "- Unmounting partitions"
(umount_apex
if [ ! -d /postinstall/tmp ]; then
umount -l /system
umount -l /system_root
fi
umount -l /vendor
umount -l /persist
umount -l /metadata
for DIR in /apex /system /system_root; do
if [ -L "${DIR}_link" ]; then
rmdir $DIR
mv -f ${DIR}_link $DIR
fi
done
umount -l /dev/random) 2>/dev/null
[ -z $OLD_LD_LIB ] || export LD_LIBRARY_PATH=$OLD_LD_LIB
[ -z $OLD_LD_PRE ] || export LD_PRELOAD=$OLD_LD_PRE
[ -z $OLD_LD_CFG ] || export LD_CONFIG_FILE=$OLD_LD_CFG
}
#######################
# Installation Related
#######################
# find_block [partname...]
find_block() {
local BLOCK DEV DEVICE DEVNAME PARTNAME UEVENT
for BLOCK in "$@"; do
DEVICE=`find /dev/block \( -type b -o -type c -o -type l \) -iname $BLOCK | head -n 1` 2>/dev/null
if [ ! -z $DEVICE ]; then
readlink -f $DEVICE
return 0
fi
done
# Fallback by parsing sysfs uevents
for UEVENT in /sys/dev/block/*/uevent; do
DEVNAME=`grep_prop DEVNAME $UEVENT`
PARTNAME=`grep_prop PARTNAME $UEVENT`
for BLOCK in "$@"; do
if [ "$(toupper $BLOCK)" = "$(toupper $PARTNAME)" ]; then
echo /dev/block/$DEVNAME
return 0
fi
done
done
# Look just in /dev in case we're dealing with MTD/NAND without /dev/block devices/links
for DEV in "$@"; do
DEVICE=`find /dev \( -type b -o -type c -o -type l \) -maxdepth 1 -iname $DEV | head -n 1` 2>/dev/null
if [ ! -z $DEVICE ]; then
readlink -f $DEVICE
return 0
fi
done
return 1
}
# setup_mntpoint <mountpoint>
setup_mntpoint() {
local POINT=$1
[ -L $POINT ] && mv -f $POINT ${POINT}_link
if [ ! -d $POINT ]; then
rm -f $POINT
mkdir -p $POINT
fi
}
# mount_name <partname(s)> <mountpoint> <flag>
mount_name() {
local PART=$1
local POINT=$2
local FLAG=$3
setup_mntpoint $POINT
is_mounted $POINT && return
# First try mounting with fstab
mount $FLAG $POINT 2>/dev/null
if ! is_mounted $POINT; then
local BLOCK=$(find_block $PART)
mount $FLAG $BLOCK $POINT || return
fi
ui_print "- Mounting $POINT"
}
# mount_ro_ensure <partname(s)> <mountpoint>
mount_ro_ensure() {
# We handle ro partitions only in recovery
$BOOTMODE && return
local PART=$1
local POINT=$2
mount_name "$PART" $POINT '-o ro'
is_mounted $POINT || abort "! Cannot mount $POINT"
}
mount_partitions() {
# Check A/B slot
SLOT=`grep_cmdline androidboot.slot_suffix`
if [ -z $SLOT ]; then
SLOT=`grep_cmdline androidboot.slot`
[ -z $SLOT ] || SLOT=_${SLOT}
fi
[ -z $SLOT ] || ui_print "- Current boot slot: $SLOT"
# Mount ro partitions
if is_mounted /system_root; then
umount /system 2&>/dev/null
umount /system_root 2&>/dev/null
fi
mount_ro_ensure "system$SLOT app$SLOT" /system
if [ -f /system/init -o -L /system/init ]; then
SYSTEM_ROOT=true
setup_mntpoint /system_root
if ! mount --move /system /system_root; then
umount /system
umount -l /system 2>/dev/null
mount_ro_ensure "system$SLOT app$SLOT" /system_root
fi
mount -o bind /system_root/system /system
else
SYSTEM_ROOT=false
grep ' / ' /proc/mounts | grep -qv 'rootfs' || grep -q ' /system_root ' /proc/mounts && SYSTEM_ROOT=true
fi
# /vendor is used only on some older devices for recovery AVBv1 signing so is not critical if fails
[ -L /system/vendor ] && mount_name vendor$SLOT /vendor '-o ro'
$SYSTEM_ROOT && ui_print "- Device is system-as-root"
# Allow /system/bin commands (dalvikvm) on Android 10+ in recovery
$BOOTMODE || mount_apex
}
# loop_setup <ext4_img>, sets LOOPDEV
loop_setup() {
unset LOOPDEV
local LOOP
local MINORX=1
[ -e /dev/block/loop1 ] && MINORX=$(stat -Lc '%T' /dev/block/loop1)
local NUM=0
while [ $NUM -lt 64 ]; do
LOOP=/dev/block/loop$NUM
[ -e $LOOP ] || mknod $LOOP b 7 $((NUM * MINORX))
if losetup $LOOP "$1" 2>/dev/null; then
LOOPDEV=$LOOP
break
fi
NUM=$((NUM + 1))
done
}
mount_apex() {
$BOOTMODE || [ ! -d /system/apex ] && return
local APEX DEST
setup_mntpoint /apex
mount -t tmpfs tmpfs /apex -o mode=755
local PATTERN='s/.*"name":[^"]*"\([^"]*\).*/\1/p'
for APEX in /system/apex/*; do
if [ -f $APEX ]; then
# APEX APKs, extract and loop mount
unzip -qo $APEX apex_payload.img -d /apex
DEST=$(unzip -qp $APEX apex_manifest.pb | strings | head -n 1)
[ -z $DEST ] && DEST=$(unzip -qp $APEX apex_manifest.json | sed -n $PATTERN)
[ -z $DEST ] && continue
DEST=/apex/$DEST
mkdir -p $DEST
loop_setup /apex/apex_payload.img
if [ ! -z $LOOPDEV ]; then
ui_print "- Mounting $DEST"
mount -t ext4 -o ro,noatime $LOOPDEV $DEST
fi
rm -f /apex/apex_payload.img
elif [ -d $APEX ]; then
# APEX folders, bind mount directory
if [ -f $APEX/apex_manifest.json ]; then
DEST=/apex/$(sed -n $PATTERN $APEX/apex_manifest.json)
elif [ -f $APEX/apex_manifest.pb ]; then
DEST=/apex/$(strings $APEX/apex_manifest.pb | head -n 1)
else
continue
fi
mkdir -p $DEST
ui_print "- Mounting $DEST"
mount -o bind $APEX $DEST
fi
done
export ANDROID_RUNTIME_ROOT=/apex/com.android.runtime
export ANDROID_TZDATA_ROOT=/apex/com.android.tzdata
export ANDROID_ART_ROOT=/apex/com.android.art
export ANDROID_I18N_ROOT=/apex/com.android.i18n
local APEXJARS=$(find /apex -name '*.jar' | sort | tr '\n' ':')
local FWK=/system/framework
export BOOTCLASSPATH=${APEXJARS}\
$FWK/framework.jar:$FWK/ext.jar:$FWK/telephony-common.jar:\
$FWK/voip-common.jar:$FWK/ims-common.jar:$FWK/telephony-ext.jar
}
umount_apex() {
[ -d /apex ] || return
umount -l /apex
for loop in /dev/block/loop*; do
losetup -d $loop 2>/dev/null
done
unset ANDROID_RUNTIME_ROOT
unset ANDROID_TZDATA_ROOT
unset ANDROID_ART_ROOT
unset ANDROID_I18N_ROOT
unset BOOTCLASSPATH
}
get_flags() {
# override variables
getvar KEEPVERITY
getvar KEEPFORCEENCRYPT
getvar RECOVERYMODE
if [ -z $KEEPVERITY ]; then
if $SYSTEM_ROOT; then
KEEPVERITY=true
ui_print "- System-as-root, keep dm/avb-verity"
else
KEEPVERITY=false
fi
fi
ISENCRYPTED=false
grep ' /data ' /proc/mounts | grep -q 'dm-' && ISENCRYPTED=true
[ "$(adb shell getprop ro.crypto.state)" = "encrypted" ] && ISENCRYPTED=true
if [ -z $KEEPFORCEENCRYPT ]; then
# No data access means unable to decrypt in recovery
if $ISENCRYPTED || ! $DATA; then
KEEPFORCEENCRYPT=true
ui_print "- Encrypted data, keep forceencrypt"
else
KEEPFORCEENCRYPT=false
fi
fi
[ -z $RECOVERYMODE ] && RECOVERYMODE=false
}
find_boot_image() {
BOOTIMAGE=
if $RECOVERYMODE; then
BOOTIMAGE=`find_block recovery_ramdisk$SLOT recovery$SLOT sos`
elif [ ! -z $SLOT ]; then
BOOTIMAGE=`find_block ramdisk$SLOT recovery_ramdisk$SLOT boot$SLOT`
else
BOOTIMAGE=`find_block ramdisk recovery_ramdisk kern-a android_boot kernel bootimg boot lnx boot_a`
fi
if [ -z $BOOTIMAGE ]; then
# Lets see what fstabs tells me
BOOTIMAGE=`grep -v '#' /etc/*fstab* | grep -E '/boot(img)?[^a-zA-Z]' | grep -oE '/dev/[a-zA-Z0-9_./-]*' | head -n 1`
fi
}
flash_image() {
case "$1" in
*.gz) CMD1="gzip -d < '$1' 2>/dev/null";;
*) CMD1="cat '$1'";;
esac
if $BOOTSIGNED; then
CMD2="$BOOTSIGNER -sign"
ui_print "- Sign image with verity keys"
else
CMD2="cat -"
fi
if [ -b "$2" ]; then
local img_sz=$(stat -c '%s' "$1")
local blk_sz=$(blockdev --getsize64 "$2")
[ "$img_sz" -gt "$blk_sz" ] && return 1
blockdev --setrw "$2"
local blk_ro=$(blockdev --getro "$2")
[ "$blk_ro" -eq 1 ] && return 2
eval "$CMD1" | eval "$CMD2" | cat - /dev/zero > "$2" 2>/dev/null
elif [ -c "$2" ]; then
flash_eraseall "$2" >&2
eval "$CMD1" | eval "$CMD2" | nandwrite -p "$2" - >&2
else
ui_print "- Not block or char device, storing image"
eval "$CMD1" | eval "$CMD2" > "$2" 2>/dev/null
fi
return 0
}
# Common installation script for flash_script.sh and addon.d.sh
install_magisk() {
cd $MAGISKBIN
if [ ! -c $BOOTIMAGE ]; then
eval $BOOTSIGNER -verify < $BOOTIMAGE && BOOTSIGNED=true
$BOOTSIGNED && ui_print "- Boot image is signed with AVB 1.0"
fi
# Source the boot patcher
SOURCEDMODE=true
. ./boot_patch.sh "$BOOTIMAGE"
ui_print "- Flashing new boot image"
flash_image new-boot.img "$BOOTIMAGE"
case $? in
1)
abort "! Insufficient partition size"
;;
2)
abort "! $BOOTIMAGE is read only"
;;
esac
./magiskboot cleanup
rm -f new-boot.img
run_migrations
}
sign_chromeos() {
ui_print "- Signing ChromeOS boot image"
echo > empty
./chromeos/futility vbutil_kernel --pack new-boot.img.signed \
--keyblock ./chromeos/kernel.keyblock --signprivate ./chromeos/kernel_data_key.vbprivk \
--version 1 --vmlinuz new-boot.img --config empty --arch arm --bootloader empty --flags 0x1
rm -f empty new-boot.img
mv new-boot.img.signed new-boot.img
}
remove_system_su() {
if [ -f /system/bin/su -o -f /system/xbin/su ] && [ ! -f /su/bin/su ]; then
ui_print "- Removing system installed root"
blockdev --setrw /dev/block/mapper/system$SLOT 2>/dev/null
mount -o rw,remount /system
# SuperSU
if [ -e /system/bin/.ext/.su ]; then
mv -f /system/bin/app_process32_original /system/bin/app_process32 2>/dev/null
mv -f /system/bin/app_process64_original /system/bin/app_process64 2>/dev/null
mv -f /system/bin/install-recovery_original.sh /system/bin/install-recovery.sh 2>/dev/null
cd /system/bin
if [ -e app_process64 ]; then
ln -sf app_process64 app_process
elif [ -e app_process32 ]; then
ln -sf app_process32 app_process
fi
fi
rm -rf /system/.pin /system/bin/.ext /system/etc/.installed_su_daemon /system/etc/.has_su_daemon \
/system/xbin/daemonsu /system/xbin/su /system/xbin/sugote /system/xbin/sugote-mksh /system/xbin/supolicy \
/system/bin/app_process_init /system/bin/su /cache/su /system/lib/libsupol.so /system/lib64/libsupol.so \
/system/su.d /system/etc/install-recovery.sh /system/etc/init.d/99SuperSUDaemon /cache/install-recovery.sh \
/system/.supersu /cache/.supersu /data/.supersu \
/system/app/Superuser.apk /system/app/SuperSU /cache/Superuser.apk
elif [ -f /cache/su.img -o -f /data/su.img -o -d /data/adb/su -o -d /data/su ]; then
ui_print "- Removing systemless installed root"
umount -l /su 2>/dev/null
rm -rf /cache/su.img /data/su.img /data/adb/su /data/adb/suhide /data/su /cache/.supersu /data/.supersu \
/cache/supersu_install /data/supersu_install
fi
}
api_level_arch_detect() {
API=$(grep_get_prop ro.build.version.sdk)
ABI=$(grep_get_prop ro.product.cpu.abi | cut -c-3)
ABI2=$(grep_get_prop ro.product.cpu.abi2 | cut -c-3)
ABILONG=$(grep_get_prop ro.product.cpu.abi)
ARCH=arm
ARCH32=arm
IS64BIT=false
if [ "$ABI" = "x86" ]; then ARCH=x86; ARCH32=x86; fi;
if [ "$ABI2" = "x86" ]; then ARCH=x86; ARCH32=x86; fi;
if [ "$ABILONG" = "arm64-v8a" ]; then ARCH=arm64; ARCH32=arm; IS64BIT=true; fi;
if [ "$ABILONG" = "x86_64" ]; then ARCH=x64; ARCH32=x86; IS64BIT=true; fi;
}
check_data() {
DATA=false
DATA_DE=false
if grep ' /data ' /proc/mounts | grep -vq 'tmpfs'; then
# Test if data is writable
touch /data/.rw && rm /data/.rw && DATA=true
# Test if data is decrypted
$DATA && [ -d /data/adb ] && touch /data/adb/.rw && rm /data/adb/.rw && DATA_DE=true
$DATA_DE && [ -d /data/adb/magisk ] || mkdir /data/adb/magisk || DATA_DE=false
fi
NVBASE=/data
$DATA || NVBASE=/cache/data_adb
$DATA_DE && NVBASE=/data/adb
resolve_vars
}
find_magisk_apk() {
local DBAPK
[ -z $APK ] && APK=/data/adb/magisk.apk
[ -f $APK ] || APK=/data/magisk/magisk.apk
[ -f $APK ] || APK=/data/app/com.topjohnwu.magisk*/*.apk
[ -f $APK ] || APK=/data/app/*/com.topjohnwu.magisk*/*.apk
if [ ! -f $APK ]; then
DBAPK=$(magisk --sqlite "SELECT value FROM strings WHERE key='requester'" 2>/dev/null | cut -d= -f2)
[ -z $DBAPK ] && DBAPK=$(strings /data/adb/magisk.db | grep -oE 'requester..*' | cut -c10-)
[ -z $DBAPK ] || APK=/data/user_de/*/$DBAPK/dyn/*.apk
[ -f $APK ] || [ -z $DBAPK ] || APK=/data/app/$DBAPK*/*.apk
[ -f $APK ] || [ -z $DBAPK ] || APK=/data/app/*/$DBAPK*/*.apk
fi
[ -f $APK ] || ui_print "! Unable to detect Magisk app APK for BootSigner"
}
run_migrations() {
local LOCSHA1
local TARGET
# Legacy app installation
local BACKUP=/data/adb/magisk/stock_boot*.gz
if [ -f $BACKUP ]; then
cp $BACKUP /data
rm -f $BACKUP
fi
# Legacy backup
for gz in /data/stock_boot*.gz; do
[ -f $gz ] || break
LOCSHA1=`basename $gz | sed -e 's/stock_boot_//' -e 's/.img.gz//'`
[ -z $LOCSHA1 ] && break
mkdir /data/magisk_backup_${LOCSHA1} 2>/dev/null
mv $gz /data/magisk_backup_${LOCSHA1}/boot.img.gz
done
# Stock backups
LOCSHA1=$SHA1
for name in boot dtb dtbo dtbs; do
BACKUP=/data/adb/magisk/stock_${name}.img
[ -f $BACKUP ] || continue
if [ $name = 'boot' ]; then
LOCSHA1=`$MAGISKBIN/magiskboot sha1 $BACKUP`
mkdir /data/magisk_backup_${LOCSHA1} 2>/dev/null
fi
TARGET=/data/magisk_backup_${LOCSHA1}/${name}.img
cp $BACKUP $TARGET
rm -f $BACKUP
gzip -9f $TARGET
done
}
copy_sepolicy_rules() {
# Remove all existing rule folders
rm -rf /data/unencrypted/magisk /cache/magisk /metadata/magisk /persist/magisk /mnt/vendor/persist/magisk
# Find current active RULESDIR
local RULESDIR
local active_dir=$(magisk --path)/.magisk/mirror/sepolicy.rules
if [ -L $active_dir ]; then
RULESDIR=$(readlink $active_dir)
[ "${RULESDIR:0:1}" != "/" ] && RULESDIR="$(magisk --path)/.magisk/mirror/$RULESDIR"
elif [ -d /data/unencrypted ] && ! grep ' /data ' /proc/mounts | grep -qE 'dm-|f2fs'; then
RULESDIR=/data/unencrypted/magisk
elif grep -q ' /cache ' /proc/mounts; then
RULESDIR=/cache/magisk
elif grep -q ' /metadata ' /proc/mounts; then
RULESDIR=/metadata/magisk
elif grep -q ' /persist ' /proc/mounts; then
RULESDIR=/persist/magisk
elif grep -q ' /mnt/vendor/persist ' /proc/mounts; then
RULESDIR=/mnt/vendor/persist/magisk
else
return
fi
# Copy all enabled sepolicy.rule
for r in /data/adb/modules*/*/sepolicy.rule; do
[ -f "$r" ] || continue
local MODDIR=${r%/*}
[ -f $MODDIR/disable ] && continue
[ -f $MODDIR/remove ] && continue
local MODNAME=${MODDIR##*/}
mkdir -p $RULESDIR/$MODNAME
cp -f $r $RULESDIR/$MODNAME/sepolicy.rule
done
}
#################
# Module Related
#################
set_perm() {
chown $2:$3 $1 || return 1
chmod $4 $1 || return 1
CON=$5
[ -z $CON ] && CON=u:object_r:system_file:s0
chcon $CON $1 || return 1
}
set_perm_recursive() {
find $1 -type d 2>/dev/null | while read dir; do
set_perm $dir $2 $3 $4 $6
done
find $1 -type f -o -type l 2>/dev/null | while read file; do
set_perm $file $2 $3 $5 $6
done
}
mktouch() {
mkdir -p ${1%/*} 2>/dev/null
[ -z $2 ] && touch $1 || echo $2 > $1
chmod 644 $1
}
request_size_check() {
reqSizeM=`du -ms "$1" | cut -f1`
}
request_zip_size_check() {
reqSizeM=`unzip -l "$1" | tail -n 1 | awk '{ print int(($1 - 1) / 1048576 + 1) }'`
}
boot_actions() { return; }
# Require ZIPFILE to be set
is_legacy_script() {
unzip -l "$ZIPFILE" install.sh | grep -q install.sh
return $?
}
# Require OUTFD, ZIPFILE to be set
install_module() {
rm -rf $TMPDIR
mkdir -p $TMPDIR
cd $TMPDIR
setup_flashable
mount_partitions
api_level_arch_detect
# Setup busybox and binaries
if $BOOTMODE; then
boot_actions
else
recovery_actions
fi
# Extract prop file
unzip -o "$ZIPFILE" module.prop -d $TMPDIR >&2
[ ! -f $TMPDIR/module.prop ] && abort "! Unable to extract zip file!"
local MODDIRNAME=modules
$BOOTMODE && MODDIRNAME=modules_update
local MODULEROOT=$NVBASE/$MODDIRNAME
MODID=`grep_prop id $TMPDIR/module.prop`
MODNAME=`grep_prop name $TMPDIR/module.prop`
MODAUTH=`grep_prop author $TMPDIR/module.prop`
MODPATH=$MODULEROOT/$MODID
# Create mod paths
rm -rf $MODPATH
mkdir -p $MODPATH
if is_legacy_script; then
unzip -oj "$ZIPFILE" module.prop install.sh uninstall.sh 'common/*' -d $TMPDIR >&2
# Load install script
. $TMPDIR/install.sh
# Callbacks
print_modname
on_install
[ -f $TMPDIR/uninstall.sh ] && cp -af $TMPDIR/uninstall.sh $MODPATH/uninstall.sh
$SKIPMOUNT && touch $MODPATH/skip_mount
$PROPFILE && cp -af $TMPDIR/system.prop $MODPATH/system.prop
cp -af $TMPDIR/module.prop $MODPATH/module.prop
$POSTFSDATA && cp -af $TMPDIR/post-fs-data.sh $MODPATH/post-fs-data.sh
$LATESTARTSERVICE && cp -af $TMPDIR/service.sh $MODPATH/service.sh
ui_print "- Setting permissions"
set_permissions
else
print_title "$MODNAME" "by $MODAUTH"
print_title "Powered by Magisk"
unzip -o "$ZIPFILE" customize.sh -d $MODPATH >&2
if ! grep -q '^SKIPUNZIP=1$' $MODPATH/customize.sh 2>/dev/null; then
ui_print "- Extracting module files"
unzip -o "$ZIPFILE" -x 'META-INF/*' -d $MODPATH >&2
# Default permissions
set_perm_recursive $MODPATH 0 0 0755 0644
fi
# Load customization script
[ -f $MODPATH/customize.sh ] && . $MODPATH/customize.sh
fi
# Handle replace folders
for TARGET in $REPLACE; do
ui_print "- Replace target: $TARGET"
mktouch $MODPATH$TARGET/.replace
done
if $BOOTMODE; then
# Update info for Magisk app
mktouch $NVBASE/modules/$MODID/update
cp -af $MODPATH/module.prop $NVBASE/modules/$MODID/module.prop
fi
# Copy over custom sepolicy rules
if [ -f $MODPATH/sepolicy.rule ]; then
ui_print "- Installing custom sepolicy rules"
copy_sepolicy_rules
fi
# Remove stuff that doesn't belong to modules and clean up any empty directories
rm -rf \
$MODPATH/system/placeholder $MODPATH/customize.sh \
$MODPATH/README.md $MODPATH/.git*
rmdir -p $MODPATH
cd /
$BOOTMODE || recovery_cleanup
rm -rf $TMPDIR
ui_print "- Done"
}
##########
# Presets
##########
# Detect whether in boot mode
[ -z $BOOTMODE ] && ps | grep zygote | grep -qv grep && BOOTMODE=true
[ -z $BOOTMODE ] && ps -A 2>/dev/null | grep zygote | grep -qv grep && BOOTMODE=true
[ -z $BOOTMODE ] && BOOTMODE=false
NVBASE=/data/adb
TMPDIR=/dev/tmp
# Bootsigner related stuff
BOOTSIGNERCLASS=com.topjohnwu.signing.SignBoot
BOOTSIGNER='/system/bin/dalvikvm -Xnoimage-dex2oat -cp $APK $BOOTSIGNERCLASS'
BOOTSIGNED=false
resolve_vars

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# Overview
This scripts aims in simplifing patching and installing Magisk after a LineageOS **for microG** update.
It has been made to run on Linux x86 or x64 and patch a boot image for an ARM device.
It detects LineageOS **for microG** version via adb, download the ROM, extracts `payload.bin` and dumps `boot.img`, patches it with Magisk, and flashes it.
:warning: **This has only been tested on a FP3 device, at the time of writing with LineageOS for microG 18.1 (November 18, 2021 build) Magisk v23.0** :warning:
## Run on other device
Before to run this script for an other device, please make sure you understand what you run and every step of the script.
**I won't be responsible if anything goes wrong.**
The script is designed to:
* run the script `boot_patch.sh boot.img` with KEEPVERITY and KEEPFORCEENCRYPT to true
* install Magisk by patching the **boot image** and **not the recovery image**.
* run to flash the boot image in **boot_a** or **boot_b** partition (the FP3 way) and **not boot partition**
If you fit the conditions above, you have to make sure the patch `KEEPVERITY=true KEEPFORCEENCRYPT=true sh boot_patch.sh` outputs the same boot image than the Magisk Manager app:
* patch boot via Magisk Manager app
* run `boot_patch.sh boot.img` manually
* compare both files `magisk_patched-*.img` and `new-boot.img` with diff or by comparing hashes.
If **and only if** both output files are the same and you meet all the conditions, you can try the python script.
# Prerequisites
## In PATH
You need to have on your system (in your PATH):
* adb
* fastboot
* payload-dumper-go
* python (3)
* dos2unix
## USB debugging
You need to have USB debugging Enabled and configured.
Check your devices appears when running `adb devices` with device connected via USB.
## Using
Replace the `device` variable by your device code, as [listed here](https://download.lineage.microg.org/).
Run `python magisk_boot_flasher.py`
# Run patch boot locally
That's how we can run Magisk's `boot_patch.sh` on Linux x86 or x64 and patch a boot image for an ARM device
> Tested with Magisk v23.0 with FP3
* Get Magisk `.apk`
* Extract it
Keep in the same folder:
* `assets/boot_patch.sh` -> `boot_patch.sh`
* `assets/util_functions.sh` -> `util_functions.sh`
* `lib/armeabi-v7a/libmagisk32.so` -> `magisk32`
* `lib/armeabi-v7a/libmagisk64.so` -> `magisk64`
* `lib/armeabi-v7a/libmagiskinit.so` -> `magiskinit`
* `lib/x86/libmagiskboot.so` -> `magiskboot`
* `lib/armeabi-v7a/libmagiskinit.so` -> `magiskinit`
You can delete all the rest.
In util_functions.sh:
* Change function `ui_print()` to contain only `echo "$1"`
* Change every `getprop` command, to `adb shell getprop`, to go run it on device rather than locally.
You can now run:
`sh boot_patch.sh boot.img`
The outpout file `new-boot.img` has the exact same sha256 hash as the `magisk_patched-*.img`, so we can consider it works :)

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import requests
import hashlib
import sys
import zipfile
from tqdm import tqdm
import subprocess
import time
device = 'FP3'
magiskdir = 'Magisk-v23.0'
def yes_or_no(question, default=None):
"""Ask a yes/no question via raw_input() and return their answer.
"question" is a string that is presented to the user.
"default" is the presumed answer if the user just hits <Enter>.
It must be "yes" (the default), "no" or None (meaning
an answer is required of the user).
The "answer" return value is True for "yes" or False for "no".
"""
valid = {"yes": True, "y": True, "ye": True, "no": False, "n": False}
if default is None:
prompt = " [y/n] "
elif default == "yes":
prompt = " [Y/n] "
elif default == "no":
prompt = " [y/N] "
else:
raise ValueError("Invalid default answer: '%s'" % default)
while True:
choice = input(question + prompt).lower()
if default is not None and choice == "":
return valid[default]
elif choice in valid:
return valid[choice]
else:
print("Please respond with 'yes' or 'no' " "(or 'y' or 'n').\n")
def isMagiskInstalled():
cmdlist = ['adb', 'shell', 'command', '-v', 'su']
sp = subprocess.run(cmdlist, stdout=subprocess.DEVNULL,
stderr=subprocess.STDOUT)
if sp.returncode != 0:
return False
else:
return True
def checkInstalledVersion():
cmdlist = ['adb', 'shell', 'getprop', 'ro.lineage.version']
sp = subprocess.run(cmdlist, stdout=subprocess.PIPE)
currentversion = sp.stdout.decode('UTF-8').rstrip()
return currentversion
def downloadUpdate(device, version):
filename = f"lineage-{version}.zip"
url = f'https://download.lineage.microg.org/{device}/{filename}'
r = requests.get(url, stream=True)
with tqdm.wrapattr(open(filename, "wb"), "write",
miniters=1, desc=filename,
total=int(r.headers.get('Content-Length'))) as fout:
for chunk in r.iter_content(chunk_size=4096):
fout.write(chunk)
print('Comparing hashes...', end='', flush=True)
checkHash(filename)
print(' [OK]')
return filename
def checkHash(filename):
filehash = sha256sum(filename)
hurl = f'https://download.lineage.microg.org/{device}/{filename}.sha256sum'
r = requests.get(hurl)
correcthash = r.text.split(' ')[0]
if filehash != correcthash:
sys.exit("Error: File hash doesn't match ! Aborting.")
def sha256sum(filename, block_size=65536):
sha256 = hashlib.sha256()
with open(filename, 'rb') as f:
for block in iter(lambda: f.read(block_size), b''):
sha256.update(block)
return sha256.hexdigest()
def patchBootimg():
cmd = ['sh', f'{magiskdir}/boot_patch.sh', '../boot.img']
env = {"KEEPVERITY": "true", "KEEPFORCEENCRYPT": "true"}
sp = subprocess.run(cmd, env=env, stdout=subprocess.DEVNULL,
stderr=subprocess.STDOUT)
if sp.returncode != 0:
sys.exit('\nERROR: boot_patch.sh exited with errors!')
def rebootToBootloader():
cmd = ['adb', 'reboot', 'bootloader']
subprocess.run(cmd, stdout=subprocess.DEVNULL)
cmd = ['fastboot', 'devices']
while "Waiting for device in fastboot":
time.sleep(2)
sp = subprocess.run(cmd, stdout=subprocess.PIPE)
if sp.stdout != b'':
break
def flashBoot():
currentSlot = getCurrentSlot()
cmd = ['fastboot', 'flash', f'boot_{currentSlot}',
f'{magiskdir}/new-boot.img']
subprocess.run(cmd, stdout=subprocess.DEVNULL, stderr=subprocess.STDOUT)
def getCurrentSlot():
cmd = ['fastboot', 'getvar', 'current-slot']
ps = subprocess.run(cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
currentSlot = ps.stdout.decode('UTF-8').rstrip()
currentSlot = currentSlot.split('slot: ')[1].split('\n')[0]
return currentSlot
def cleanUp():
cmd = ['rm', 'payload.bin', 'boot.img']
subprocess.run(cmd, stdout=subprocess.DEVNULL)
cmd = ['rm', 'lineage-*.zip']
subprocess.run(cmd, shell=True, stdout=subprocess.DEVNULL)
magiskFilelist = ['kernel', 'kernel_dtb', 'ramdisk.cpio', 'new-boot.img',
'stock_boot.img']
for f in magiskFilelist:
cmd = ['rm', f'{magiskdir}/{f}']
subprocess.run(cmd, stdout=subprocess.DEVNULL)
if __name__ == "__main__":
print("Checking if Magisk already installed...", end='', flush=True)
if isMagiskInstalled():
print("\nIt seems Magisk is already installed (su in PATH).")
print("Aborting.")
sys.exit()
print(' [OK]')
print("Getting installed verion (via adb)...", end='', flush=True)
installedversion = checkInstalledVersion()
print(' [OK]')
print("Seems you have haven't flashed yet Magisk on the new firmaware.")
if not yes_or_no("Would you like do download the new firmware?"):
sys.exit()
print(f"Downloading version: {installedversion}")
filename = downloadUpdate(device, installedversion)
print("Download finished, extracting payload.bin from release...", end='',
flush=True)
with zipfile.ZipFile(filename, 'r') as zip_ref:
zip_ref.extract('payload.bin')
print(' [OK]')
print("Extracting boot.img...", end='', flush=True)
cmd = ['payload-dumper-go', '-p', 'boot', '-o', '.', 'payload.bin']
subprocess.run(cmd, stdout=subprocess.DEVNULL)
print(' [OK]')
print("Patching boot.img with Magisk scripts...", end='', flush=True)
patchBootimg()
print(' [OK]')
if not yes_or_no("Would you like to flash the new boot image?"):
sys.exit()
print("Make sure your device is connected via USB.")
input("Press Enter to continue...")
print('Rebooting device to bootloader...', end='', flush=True)
rebootToBootloader()
print(' [OK]')
print('Flashing new boot image...', end='', flush=True)
flashBoot()
print(' [OK]')
print('Cleaning up files...', end='', flush=True)
cleanUp()
print(' [OK]')
print('Rebooting device, enjoy Magisk! ;)')
cmd = ['fastboot', 'reboot']
subprocess.run(cmd, stdout=subprocess.DEVNULL, stderr=subprocess.STDOUT)