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Magisk
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Magisk/scripts/flash_script.sh

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#!/sbin/sh
##########################################################################################
#
# Magisk Boot Image Patcher
# by topjohnwu
#
# This zip will patch your boot image with Magisk support
#
##########################################################################################
MAGISK=true
# Detect whether in boot mode
ps | grep zygote | grep -v grep >/dev/null && BOOTMODE=true || BOOTMODE=false
# This path should work in any cases
TMPDIR=/dev/tmp
INSTALLER=$TMPDIR/magisk
COMMONDIR=$INSTALLER/common
BOOTTMP=$TMPDIR/boottmp
COREDIR=/magisk/.core
CHROMEDIR=$INSTALLER/chromeos
# Default permissions
umask 022
##########################################################################################
# Flashable update-binary preparation
##########################################################################################
OUTFD=$2
ZIP=$3
readlink /proc/$$/fd/$OUTFD 2>/dev/null | grep /tmp >/dev/null
if [ "$?" -eq "0" ]; then
OUTFD=0
for FD in `ls /proc/$$/fd`; do
readlink /proc/$$/fd/$FD 2>/dev/null | grep pipe >/dev/null
if [ "$?" -eq "0" ]; then
ps | grep " 3 $FD " | grep -v grep >/dev/null
if [ "$?" -eq "0" ]; then
OUTFD=$FD
break
fi
fi
done
fi
mkdir -p $INSTALLER
cd $INSTALLER
unzip -o "$ZIP"
##########################################################################################
# Functions
##########################################################################################
ui_print() {
if $BOOTMODE; then
echo "$1"
else
echo -n -e "ui_print $1\n" >> /proc/self/fd/$OUTFD
echo -n -e "ui_print\n" >> /proc/self/fd/$OUTFD
fi
}
getvar() {
local VARNAME=$1
local VALUE=$(eval echo \$"$VARNAME");
for FILE in /dev/.magisk /data/.magisk /cache/.magisk /system/.magisk; do
if [ -z "$VALUE" ]; then
LINE=$(cat $FILE 2>/dev/null | grep "$VARNAME=")
if [ ! -z "$LINE" ]; then
VALUE=${LINE#*=}
fi
fi
done
eval $VARNAME=\$VALUE
}
find_boot_image() {
if [ -z "$BOOTIMAGE" ]; then
for PARTITION in kern-a KERN-A android_boot ANDROID_BOOT kernel KERNEL boot BOOT lnx LNX; do
BOOTIMAGE=`readlink /dev/block/by-name/$PARTITION || readlink /dev/block/platform/*/by-name/$PARTITION || readlink /dev/block/platform/*/*/by-name/$PARTITION`
if [ ! -z "$BOOTIMAGE" ]; then break; fi
done
fi
if [ -z "$BOOTIMAGE" ]; then
FSTAB="/etc/recovery.fstab"
[ ! -f "$FSTAB" ] && FSTAB="/etc/recovery.fstab.bak"
[ -f "$FSTAB" ] && BOOTIMAGE=`grep -E '\b/boot\b' "$FSTAB" | grep -oE '/dev/[a-zA-Z0-9_./-]*'`
fi
}
is_mounted() {
if [ ! -z "$2" ]; then
cat /proc/mounts | grep $1 | grep $2, >/dev/null
else
cat /proc/mounts | grep $1 >/dev/null
fi
return $?
}
mount_image() {
if [ ! -d "$2" ]; then
mount -o rw,remount rootfs /
mkdir -p $2 2>/dev/null
($BOOTMODE) && mount -o ro,remount rootfs /
[ ! -d "$2" ] && return 1
fi
if (! is_mounted $2); then
LOOPDEVICE=
for LOOP in 0 1 2 3 4 5 6 7; do
if (! is_mounted $2); then
LOOPDEVICE=/dev/block/loop$LOOP
if [ ! -f "$LOOPDEVICE" ]; then
mknod $LOOPDEVICE b 7 $LOOP 2>/dev/null
fi
losetup $LOOPDEVICE $1
if [ "$?" -eq "0" ]; then
mount -t ext4 -o loop $LOOPDEVICE $2
if (! is_mounted $2); then
/system/bin/toolbox mount -t ext4 -o loop $LOOPDEVICE $2
fi
if (! is_mounted $2); then
/system/bin/toybox mount -t ext4 -o loop $LOOPDEVICE $2
fi
fi
if (is_mounted $2); then
ui_print "- Mounting $1 to $2"
break;
fi
fi
done
fi
}
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
}
remove_system_su() {
if [ -f /system/bin/su -o -f /system/xbin/su ] && [ ! -f /su/bin/su ]; then
ui_print "! System installed root detected, mount rw :("
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
else
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 2>/dev/null
fi
}
# --cpio-add <incpio> <mode> <entry> <infile>
cpio_add() {
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/magiskboot --cpio-add ramdisk.cpio $1 $2 $3
}
# --cpio-extract <incpio> <entry> <outfile>
cpio_extract() {
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/magiskboot --cpio-extract ramdisk.cpio $1 $2
}
# --cpio-mkdir <incpio> <mode> <entry>
cpio_mkdir() {
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/magiskboot --cpio-mkdir ramdisk.cpio $1 $2
}
##########################################################################################
# Detection
##########################################################################################
ui_print "************************"
ui_print "* MAGISK_VERSION_STUB"
ui_print "************************"
if [ ! -d "$COMMONDIR" ]; then
ui_print "! Failed: Unable to extract zip file!"
exit 1
fi
ui_print "- Mounting /system(ro), /cache, /data"
mount -o ro /system 2>/dev/null
mount /cache 2>/dev/null
mount /data 2>/dev/null
if [ ! -f '/system/build.prop' ]; then
ui_print "! Failed: /system could not be mounted!"
exit 1
fi
# read override variables
getvar KEEPVERITY
getvar KEEPFORCEENCRYPT
getvar BOOTIMAGE
[ -z $KEEPVERITY ] && KEEPVERITY=false
[ -z $KEEPFORCEENCRYPT ] && KEEPFORCEENCRYPT=false
# Check if system root is installed and remove
remove_system_su
API=`grep_prop ro.build.version.sdk`
ABI=`grep_prop ro.product.cpu.abi | cut -c-3`
ABI2=`grep_prop ro.product.cpu.abi2 | cut -c-3`
ABILONG=`grep_prop ro.product.cpu.abi`
ARCH=arm
IS64BIT=false
if [ "$ABI" = "x86" ]; then ARCH=x86; fi;
if [ "$ABI2" = "x86" ]; then ARCH=x86; fi;
if [ "$ABILONG" = "arm64-v8a" ]; then ARCH=arm64; IS64BIT=true; fi;
if [ "$ABILONG" = "x86_64" ]; then ARCH=x64; IS64BIT=true; fi;
if [ "$API" -lt "21" ]; then
ui_print "! Magisk is only for Lollipop 5.0+ (SDK 21+)"
exit 1
fi
ui_print "- Device platform: $ARCH"
BINDIR=$INSTALLER/$ARCH
chmod -R 755 $CHROMEDIR $BINDIR
SYSTEMLIB=/system/lib
$IS64BIT && SYSTEMLIB=/system/lib64
find_boot_image
if [ -z $BOOTIMAGE ]; then
ui_print "! Unable to detect boot image"
exit 1
fi
##########################################################################################
# Environment
##########################################################################################
ui_print "- Constructing environment"
is_mounted /data && MAGISKBIN=/data/magisk || MAGISKBIN=/cache/data_bin
# Copy required files
rm -rf $MAGISKBIN 2>/dev/null
mkdir -p $MAGISKBIN
cp -af $BINDIR/. $COMMONDIR/magisk.apk $COMMONDIR/init.magisk.rc $COMMONDIR/custom_ramdisk_patch.sh $MAGISKBIN
chmod -R 755 $MAGISKBIN
chcon -h u:object_r:system_file:s0 $MAGISKBIN $MAGISKBIN/*
##########################################################################################
# Magisk Image
##########################################################################################
# Fix SuperSU.....
$BOOTMODE && $BINDIR/magiskpolicy --live "allow fsck * * *"
if (is_mounted /data); then
IMG=/data/magisk.img
else
IMG=/cache/magisk.img
ui_print "- Data unavailable, use cache workaround"
fi
if [ -f $IMG ]; then
ui_print "- $IMG detected!"
else
ui_print "- Creating $IMG"
make_ext4fs -l 64M -a /magisk -S $COMMONDIR/file_contexts_image $IMG
fi
mount_image $IMG /magisk
if (! is_mounted /magisk); then
ui_print "! Magisk image mount failed..."
exit 1
fi
MAGISKLOOP=$LOOPDEVICE
# Core folders and scripts
mkdir -p $COREDIR/props $COREDIR/magiskhide $COREDIR/post-fs-data.d $COREDIR/service.d 2>/dev/null
cp -af $COMMONDIR/magiskhide/. $COREDIR/magiskhide
chmod -R 755 $COREDIR/bin $COREDIR/magiskhide $COREDIR/post-fs-data.d $COREDIR/service.d
chown -R 0.0 $COREDIR/bin $COREDIR/magiskhide $COREDIR/post-fs-data.d $COREDIR/service.d
##########################################################################################
# Unpack boot
##########################################################################################
ui_print "- Found Boot Image: $BOOTIMAGE"
rm -rf $BOOTTMP 2>/dev/null
mkdir -p $BOOTTMP
cd $BOOTTMP
ui_print "- Unpacking boot image"
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/magiskboot --unpack $BOOTIMAGE
if [ $? -ne 0 ]; then
ui_print "! Unable to unpack boot image"
exit 1
fi
##########################################################################################
# Ramdisk restores
##########################################################################################
# Update our previous backup to new format if exists
if [ -f /data/stock_boot.img ]; then
SHA1=`LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/magiskboot --sha1 /data/stock_boot.img | tail -n 1`
STOCKDUMP=/data/stock_boot_${SHA1}.img
mv /data/stock_boot.img $STOCKDUMP
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/magiskboot --compress $STOCKDUMP
fi
# Test patch status and do restore, after this section, ramdisk.cpio.orig is guaranteed to exist
SUPERSU=false
ui_print "- Checking patch status"
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/magiskboot --cpio-test ramdisk.cpio
case $? in
0 ) # Stock boot
ui_print "- Backing up stock boot image"
rm -f /data/stock_boot*
SHA1=`LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/magiskboot --sha1 $BOOTIMAGE | tail -n 1`
is_mounted /data && STOCKDUMP=/data/stock_boot_${SHA1}.img || STOCKDUMP=/cache/stock_boot_${SHA1}.img
dd if=$BOOTIMAGE of=$STOCKDUMP
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/magiskboot --compress $STOCKDUMP
cp -af ramdisk.cpio ramdisk.cpio.orig
;;
1 ) # Magisk patched
# Find SHA1 of stock boot image
if [ -z $SHA1 ]; then
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/magiskboot --cpio-extract ramdisk.cpio init.magisk.rc init.magisk.rc
SHA1=`grep_prop "# STOCKSHA1" init.magisk.rc`
[ ! -z $SHA1 ] && STOCKDUMP=/data/stock_boot_${SHA1}.img
rm -f init.magisk.rc
fi
ui_print "- Restoring ramdisk backup"
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/magiskboot --cpio-restore ramdisk.cpio
if [ $? -ne 0 ]; then
# Restore failed, try to find original
ui_print "! Cannot restore from ramdisk backup"
ui_print "- Finding stock boot image backup"
if [ -f ${STOCKDUMP}.gz ]; then
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/magiskboot --decompress ${STOCKDUMP}.gz stock_boot.img
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/magiskboot --unpack stock_boot.img
rm -f stock_boot.img
else
ui_print "! Cannot find stock boot image backup"
ui_print "! Will still try to complete installation"
fi
fi
cp -af ramdisk.cpio ramdisk.cpio.orig
;;
2 ) # SuperSU patched
SUPERSU=true
ui_print "- SuperSU patched boot detected!"
ui_print "- Adding ramdisk patch script for SuperSU"
cp -af $COMMONDIR/custom_ramdisk_patch.sh /data/custom_ramdisk_patch.sh
ui_print "- We are using SuperSU's own tools, mounting su.img"
is_mounted /data && SUIMG=/data/su.img || SUIMG=/cache/su.img
mount_image $SUIMG /su
SUPERSULOOP=$LOOPDEVICE
if (is_mounted /su); then
ui_print "- Restoring ramdisk backup with sukernel"
LD_LIBRARY_PATH=$SYSTEMLIB /su/bin/sukernel --cpio-restore ramdisk.cpio ramdisk.cpio.orig
if [ $? -ne 0 ]; then
ui_print "! Cannot restore from ramdisk"
ui_print "- Finding stock boot image backup with sukernel"
LD_LIBRARY_PATH=$SYSTEMLIB /su/bin/sukernel --restore ramdisk.cpio stock_boot.img
if [ $? -eq 0 ]; then
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/magiskboot --unpack stock_boot.img
cp -af ramdisk.cpio ramdisk.cpio.orig
rm stock_boot.img
else
ui_print "! Cannot find stock boot image backup"
exit 1
fi
fi
else
ui_print "! SuperSU image mount failed..."
ui_print "! Magisk scripts are placed correctly"
ui_print "! Flash SuperSU immediately to finish installation"
exit 1
fi
;;
esac
##########################################################################################
# Boot image patches
##########################################################################################
# All ramdisk patch commands are stored in a separate script
ui_print "- Patching ramdisk"
if $SUPERSU; then
# Use sukernel to patch ramdisk, so we can use its own tools to backup
sh $COMMONDIR/custom_ramdisk_patch.sh $BOOTTMP/ramdisk.cpio
# Create ramdisk backups
LD_LIBRARY_PATH=$SYSTEMLIB /su/bin/sukernel --cpio-backup ramdisk.cpio.orig ramdisk.cpio ramdisk.cpio
else
# The common patches
$KEEPVERITY || LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/magiskboot --cpio-patch-dmverity ramdisk.cpio
$KEEPFORCEENCRYPT || LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/magiskboot --cpio-patch-forceencrypt ramdisk.cpio
# Add magisk entrypoint
cpio_extract init.rc init.rc
grep "import /init.magisk.rc" init.rc >/dev/null || sed -i '1,/.*import.*/s/.*import.*/import \/init.magisk.rc\n&/' init.rc
sed -i "/selinux.reload_policy/d" init.rc
cpio_add 750 init.rc init.rc
# sepolicy patches
cpio_extract sepolicy sepolicy
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/magisk magiskpolicy --load sepolicy --save sepolicy --minimal
cpio_add 644 sepolicy sepolicy
# Add new items
[ ! -z $SHA1 ] && echo "# STOCKSHA1=$SHA1" >> $COMMONDIR/init.magisk.rc
cpio_add 750 init.magisk.rc $COMMONDIR/init.magisk.rc
cpio_add 755 sbin/magisk $BINDIR/magisk
# Create ramdisk backups
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/magiskboot --cpio-backup ramdisk.cpio ramdisk.cpio.orig
fi
rm -f ramdisk.cpio.orig
##########################################################################################
# Repack and flash
##########################################################################################
# Hexpatches
# Remove Samsung RKP in stock kernel
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/magiskboot --hexpatch kernel \
49010054011440B93FA00F71E9000054010840B93FA00F7189000054001840B91FA00F7188010054 \
A1020054011440B93FA00F7140020054010840B93FA00F71E0010054001840B91FA00F7181010054
ui_print "- Repacking boot image"
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/magiskboot --repack $BOOTIMAGE
case $? in
1 )
ui_print "! Unable to repack boot image!"
exit 1
;;
2 )
ui_print "! Boot partition space insufficient"
ui_print "! Remove ramdisk backups and try again"
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/magiskboot --cpio-rm ramdisk.cpio -r .backup
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/magiskboot --repack $BOOTIMAGE
if [ $? -eq 2 ]; then
ui_print "! Boot partition size still too small..."
ui_print "! Unable to install Magisk"
exit 1
fi
;;
esac
# Sign chromeos boot
if [ -f chromeos ]; then
cp -af $CHROMEDIR/. $MAGISKBIN/chromeos
echo > config
echo > bootloader
LD_LIBRARY_PATH=$SYSTEMLIB $CHROMEDIR/futility vbutil_kernel --pack new-boot.img.signed --keyblock $CHROMEDIR/kernel.keyblock --signprivate $CHROMEDIR/kernel_data_key.vbprivk --version 1 --vmlinuz new-boot.img --config config --arch arm --bootloader bootloader --flags 0x1
rm -f new-boot.img
mv new-boot.img.signed new-boot.img
fi
ui_print "- Flashing new boot image"
[ ! -L $BOOTIMAGE ] && dd if=/dev/zero of=$BOOTIMAGE bs=4096 2>/dev/null
dd if=new-boot.img of=$BOOTIMAGE bs=4096
cd /
if ! $BOOTMODE; then
ui_print "- Unmounting partitions"
umount /magisk
losetup -d $MAGISKLOOP
rmdir /magisk
if $SUPERSU; then
umount /su
losetup -d $SUPERSULOOP
rmdir /su
fi
umount /system
fi
ui_print "- Done"
exit 0
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