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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
#
##########################################################################################
if [ -z "$BOOTMODE" ]; then
BOOTMODE=false
fi
TMPDIR=/tmp
($BOOTMODE) && TMPDIR=/dev/tmp
INSTALLER=$TMPDIR/magisk
COREDIR=/magisk/.core
# Boot Image Variables
CHROMEDIR=$INSTALLER/chromeos
NEWBOOT=$TMPDIR/boottmp/new-boot.img
UNPACKDIR=$TMPDIR/boottmp/bootunpack
RAMDISK=$TMPDIR/boottmp/ramdisk
# 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
}
file_contain() {
grep "$1" "$2" >/dev/null 2>&1
return $?
}
unpack_boot() {
rm -rf $UNPACKDIR $RAMDISK 2>/dev/null
mkdir -p $UNPACKDIR
mkdir -p $RAMDISK
cd $UNPACKDIR
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/bootimgtools --extract $1
[ ! -f $UNPACKDIR/ramdisk.gz ] && return 1
cd $RAMDISK
gunzip -c < $UNPACKDIR/ramdisk.gz | cpio -i
}
repack_boot() {
if (! $SUPERSU); then
cd $RAMDISK
find . | cpio -o -H newc 2>/dev/null | gzip -9 > $UNPACKDIR/ramdisk.gz
fi
cd $UNPACKDIR
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/bootimgtools --repack $BOOTIMAGE
if [ -f chromeos ]; then
echo " " > config
echo " " > bootloader
LD_LIBRARY_PATH=$SYSTEMLIB $CHROMEDIR/futility vbutil_kernel --pack new-boot.img.signed --keyblock $CHROMEDIR/kernel.keyblock --signprivate $CHROMEDIR/kernel_data_key.vbprivk --version 1 --vmlinuz new-boot.img --config config --arch arm --bootloader bootloader --flags 0x1
rm -f new-boot.img
mv new-boot.img.signed new-boot.img
fi
if ($SAMSUNG); then
SAMSUNG_CHECK=$(cat new-boot.img | grep SEANDROIDENFORCE)
if [ $? -ne 0 ]; then
echo -n "SEANDROIDENFORCE" >> new-boot.img
fi
fi
if ($LGE_G); then
# Prevent secure boot error on LG G2/G3.
# Just for know, It's a pattern which bootloader verifies at boot. Thanks to LG hackers.
echo -n -e "\x41\xa9\xe4\x67\x74\x4d\x1d\x1b\xa4\x29\xf2\xec\xea\x65\x52\x79" >> new-boot.img
fi
mv new-boot.img $NEWBOOT
}
remove_system_su() {
if [ -f /system/bin/su -o -f /system/xbin/su ] && [ ! -f /su/bin/su ]; then
ui_print "! System installed root detected, mount rw :("
mount -o rw,remount /system
# SuperSU
if [ -e /system/bin/.ext/.su ]; then
mv -f /system/bin/app_process32_original /system/bin/app_process32 2>/dev/null
mv -f /system/bin/app_process64_original /system/bin/app_process64 2>/dev/null
mv -f /system/bin/install-recovery_original.sh /system/bin/install-recovery.sh 2>/dev/null
cd /system/bin
if [ -e app_process64 ]; then
ln -sf app_process64 app_process
else
ln -sf app_process32 app_process
fi
fi
rm -rf /system/.pin /system/bin/.ext /system/etc/.installed_su_daemon /system/etc/.has_su_daemon \
/system/xbin/daemonsu /system/xbin/su /system/xbin/sugote /system/xbin/sugote-mksh /system/xbin/supolicy \
/system/bin/app_process_init /system/bin/su /cache/su /system/lib/libsupol.so /system/lib64/libsupol.so \
/system/su.d /system/etc/install-recovery.sh /system/etc/init.d/99SuperSUDaemon /cache/install-recovery.sh \
/system/.supersu /cache/.supersu /data/.supersu \
/system/app/Superuser.apk /system/app/SuperSU /cache/Superuser.apk 2>/dev/null
fi
}
##########################################################################################
# Detection
##########################################################################################
ui_print "*****************************"
ui_print "MAGISK_VERSION_STUB"
ui_print "*****************************"
if [ ! -d "$INSTALLER/common" ]; 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
if [ -z "$NOOVERRIDE" ]; then
# read override variables
getvar KEEPVERITY
getvar KEEPFORCEENCRYPT
getvar BOOTIMAGE
fi
if [ -z "$KEEPVERITY" ]; then
# we don't keep dm-verity by default
KEEPVERITY=false
fi
if [ -z "$KEEPFORCEENCRYPT" ]; then
# we don't keep forceencrypt by default
KEEPFORCEENCRYPT=false
fi
# Check if system root is installed and remove
remove_system_su
SAMSUNG=false
SAMSUNG_CHECK=$(cat /system/build.prop | grep "ro.build.fingerprint=" | grep -i "samsung")
if [ $? -eq 0 ]; then
SAMSUNG=true
fi
LGE_G=false
RBRAND=$(grep_prop ro.product.brand)
RMODEL=$(grep_prop ro.product.device)
if [ "$RBRAND" = "lge" ] || [ "$RBRAND" = "LGE" ]; then
if [ "$RMODEL" = "*D80*" ] ||
[ "$RMODEL" = "*S98*" ] ||
[ "$RMODEL" = "*D85*" ] ||
[ "$RMODEL" = "*F40*" ]; then
LGE_G=true
ui_print "! Bump device detected"
fi
fi
API=$(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/futility $BINDIR
SYSTEMLIB=/system/lib
($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"
if (is_mounted /data); then
rm -rf /data/busybox /data/magisk 2>/dev/null
mkdir -p /data/busybox /data/magisk
cp -af $BINDIR/busybox $BINDIR/sepolicy-inject $BINDIR/resetprop \
$INSTALLER/common/init.magisk.rc $INSTALLER/common/magic_mask.sh /data/magisk
cp -af $INSTALLER/common/magisk.apk /data/magisk.apk
/data/magisk/busybox --install -s /data/busybox
ln -s /data/magisk/busybox /data/busybox/busybox
# Prevent issues
rm -f /data/busybox/su /data/busybox/sh /data/busybox/reboot
chcon -hR u:object_r:system_file:s0 /data/magisk /data/busybox
chmod -R 755 /data/magisk /data/busybox
# PATH=/data/busybox:$PATH
else
rm -rf /cache/data_bin 2>/dev/null
mkdir -p /cache/data_bin
cp -af $BINDIR/busybox $BINDIR/sepolicy-inject $BINDIR/resetprop \
$INSTALLER/common/custom_ramdisk_patch.sh $INSTALLER/common/init.magisk.rc \
$INSTALLER/common/magic_mask.sh /cache/data_bin
cp -af $INSTALLER/common/magisk.apk /cache/magisk.apk
chmod -R 755 /cache/data_bin
fi
##########################################################################################
# Image
##########################################################################################
# Fix SuperSU.....
($BOOTMODE) && $BINDIR/sepolicy-inject -s fsck --live
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 $INSTALLER/common/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/magiskhide $COREDIR/postfsdata.d $COREDIR/service.d 2>/dev/null
cp -af $INSTALLER/common/magiskhide/. $BINDIR/magiskhide $COREDIR/magiskhide
chmod -R 755 $COREDIR/magiskhide $COREDIR/postfsdata.d $COREDIR/service.d
chown -R 0.0 $COREDIR/magiskhide $COREDIR/postfsdata.d $COREDIR/service.d
##########################################################################################
# Boot image patch
##########################################################################################
ui_print "- Found Boot Image: $BOOTIMAGE"
rm -rf $TMPDIR/boottmp 2>/dev/null
mkdir -p $TMPDIR/boottmp
ui_print "- Unpacking boot image"
unpack_boot $BOOTIMAGE
if [ $? -ne 0 ]; then
ui_print "! Unable to unpack boot image"
exit 1;
fi
ORIGBOOT=
SUPERSU=false
[ -f sbin/launch_daemonsu.sh ] && SUPERSU=true
if ($SUPERSU); then
##############################
# SuperSU installation process
##############################
ui_print "- SuperSU patched boot detected!"
ui_print "- Adding auto patch script for SuperSU"
cp -af $INSTALLER/common/custom_ramdisk_patch.sh /data/custom_ramdisk_patch.sh
if (is_mounted /data); then
SUIMG=/data/su.img
else
SUIMG=/cache/su.img
fi
mount_image $SUIMG /su
if (! is_mounted /su); then
ui_print "! SU image mount failed..."
ui_print "! Please immediately flash SuperSU now"
ui_print "! Installation will complete after flashing SuperSU"
exit 1
fi
SUPERSULOOP=$LOOPDEVICE
gunzip -c < $UNPACKDIR/ramdisk.gz > $UNPACKDIR/ramdisk
ui_print "- Using sukernel to restore ramdisk"
# Restore ramdisk
LD_LIBRARY_PATH=$SYSTEMLIB /su/bin/sukernel --cpio-restore $UNPACKDIR/ramdisk $UNPACKDIR/ramdisk.orig
if [ $? -ne 0 ]; then
LD_LIBRARY_PATH=$SYSTEMLIB /su/bin/sukernel --restore $UNPACKDIR/ramdisk $TMPDIR/boottmp/stock_boot.img
if [ $? -ne 0 ]; then
ui_print "! Unable to restore ramdisk"
exit 1
fi
LD_LIBRARY_PATH=$SYSTEMLIB /su/bin/sukernel --bootimg-extract-ramdisk $TMPDIR/boottmp/stock_boot.img $UNPACKDIR/ramdisk.orig.gz
LD_LIBRARY_PATH=$SYSTEMLIB /su/bin/sukernel --ungzip $UNPACKDIR/ramdisk.orig.gz $UNPACKDIR/ramdisk.orig
fi
if [ ! -f $UNPACKDIR/ramdisk.orig ]; then
ui_print "! Unable to restore ramdisk"
exit 1
fi
rm -f $TMPDIR/boottmp/stock_boot.img $UNPACKDIR/ramdisk.orig.gz $UNPACKDIR/ramdisk.gz 2>/dev/null
ui_print "- Patching ramdisk with sukernel"
sh /data/custom_ramdisk_patch.sh $UNPACKDIR/ramdisk
LD_LIBRARY_PATH=$SYSTEMLIB /su/bin/sukernel --cpio-backup $UNPACKDIR/ramdisk.orig $UNPACKDIR/ramdisk $UNPACKDIR/ramdisk
gzip -9 < $UNPACKDIR/ramdisk > $UNPACKDIR/ramdisk.gz
rm -f $UNPACKDIR/ramdisk $UNPACKDIR/ramdisk.orig
else
##############################
# Magisk installation process
##############################
# Ramdisk restore
if [ -d ".backup" ]; then
# This implies Magisk is already installed, and ramdisk backup exists
ui_print "- Restoring ramdisk with ramdisk backup"
cp -af .backup/. .
rm -rf magisk init.magisk.rc sbin/magic_mask.sh 2>/dev/null
ORIGBOOT=false
elif [ -d "magisk" ]; then
mv -f /data/stock_boot_*.gz /data/stock_boot.img.gz 2>/dev/null
gzip -d /data/stock_boot.img.gz 2>/dev/null
rm -f /data/stock_boot.img.gz 2>/dev/null
[ -f /data/stock_boot.img ] && ORIGBOOT=/data/stock_boot.img
# If Magisk is installed and no SuperSU and no ramdisk backups,
# we restore previous stock boot image backups
if [ ! -z $ORIGBOOT ]; then
ui_print "- Restoring boot image with backup"
unpack_boot $ORIGBOOT
fi
# Removing possible modifications
rm -rf magisk init.magisk.rc sbin/magic_mask.sh sbin/su init.xposed.rc sbin/mount_xposed.sh 2>/dev/null
ORIGBOOT=false
fi
# Backups
ui_print "- Creating ramdisk backup"
mkdir .backup 2>/dev/null
cp -af *fstab* verity_key sepolicy .backup 2>/dev/null
if [ -z $ORIGBOOT ]; then
ui_print "- Creating boot image backup"
if (is_mounted /data); then
dd if=$BOOTIMAGE of=/data/stock_boot.img
else
dd if=$BOOTIMAGE of=/cache/stock_boot.img
fi
fi
# MagiskSU
ui_print "- Installing MagiskSU"
rm -rf $COREDIR/su 2>/dev/null
mkdir -p $COREDIR/su
cp -af $BINDIR/su $INSTALLER/common/magisksu.sh $COREDIR/su
chmod -R 755 $COREDIR/su
chown -R 0.0 $COREDIR/su
# Patch ramdisk
ui_print "- Patching ramdisk"
# Add magisk entrypoints
for RC in init*.rc; do
if file_contain "import /init.environ.rc" $RC && ! file_contain "import /init.magisk.rc" $RC; then
[ ! -f .backup/$RC ] && cp -af $RC .backup
sed -i "/import \/init\.environ\.rc/iimport /init.magisk.rc" $RC
fi
if file_contain "trigger load_persist_props_action" $RC && ! file_contain "trigger load_magisk_props_action" $RC; then
[ ! -f .backup/$RC ] && cp -af $RC .backup
sed -i "/trigger load_persist_props_action/a\ \ \ \ trigger load_magisk_props_action" $RC
fi
if file_contain "selinux.reload_policy"; then
[ ! -f .backup/$RC ] && cp -af $RC .backup
sed -i "/selinux.reload_policy/d" $RC
fi
done
for FSTAB in *fstab*; do
[ -L $FSTAB ] && continue
if (! $KEEPVERITY); then
sed -i "s/,support_scfs//g" $FSTAB
sed -i 's;,\{0,1\}verify\(=[^,]*\)\{0,1\};;g' $FSTAB
fi
if (! $KEEPFORCEENCRYPT); then
sed -i "s/forceencrypt/encryptable/g" $FSTAB
sed -i "s/forcefdeorfbe/encryptable/g" $FSTAB
fi
done
if (! $KEEPVERITY); then
rm verity_key 2>/dev/null
fi
# minimal sepolicy patches
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/sepolicy-inject --minimal -P sepolicy
# Add new items
mkdir -p magisk 2>/dev/null
cp -af $INSTALLER/common/init.magisk.rc init.magisk.rc
cp -af $INSTALLER/common/magic_mask.sh sbin/magic_mask.sh
chmod 0755 magisk
chmod 0750 init.magisk.rc sbin/magic_mask.sh
chown 0.0 magisk init.magisk.rc sbin/magic_mask.sh
fi
ui_print "- Repacking boot image"
repack_boot
BOOTSIZE=`blockdev --getsize64 $BOOTIMAGE 2>/dev/null`
NEWSIZE=`ls -l $NEWBOOT | awk '{print $5}'`
if [ "$NEWSIZE" -gt "$BOOTSIZE" ]; then
ui_print "! Boot partition space insufficient"
ui_print "! Remove ramdisk backups and try again"
rm -rf $RAMDISK/.backup $NEWBOOT 2>/dev/null
repack_boot
NEWSIZE=`ls -l $NEWBOOT | awk '{print $5}'`
if [ "$NEWSIZE" -gt "$BOOTSIZE" ]; then
ui_print "! Boot partition size still too small..."
ui_print "! Unable to install Magisk"
exit 1
fi
fi
chmod 644 $NEWBOOT
ui_print "- Flashing new boot image"
[ ! -L $BOOTIMAGE ] && dd if=/dev/zero of=$BOOTIMAGE bs=4096 2>/dev/null
dd if=$NEWBOOT of=$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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