Magisk/scripts/flash_script.sh
2016-12-08 01:50:10 -08:00

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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
}
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
cd $RAMDISK
gunzip -c < $UNPACKDIR/ramdisk.gz | cpio -i
}
repack_boot() {
cd $RAMDISK
find . | cpio -o -H newc 2>/dev/null | gzip -9 > $UNPACKDIR/ramdisk.gz
cd $UNPACKDIR
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/bootimgtools --repack $ORIGBOOT
if [ -f chromeos ]; then
echo " " > config
echo " " > bootloader
LD_LIBRARY_PATH=$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
mv new-boot.img $NEWBOOT
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/bootimgtools --hexpatch $NEWBOOT \
49010054011440B93FA00F71E9000054010840B93FA00F7189000054001840B91FA00F7188010054 \
A1020054011440B93FA00F7140020054010840B93FA00F71E0010054001840B91FA00F7181010054
}
##########################################################################################
# Detection
##########################################################################################
ui_print "*****************************"
ui_print "MAGISK_VERSION_STUB"
ui_print "*****************************"
if [ ! -d "$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 "$NOOVERRIDE" ]; then
# read override variables
getvar KEEPVERITY
getvar KEEPFORCEENCRYPT
getvar NORESTORE
getvar BOOTIMAGE
fi
if [ -z "$KEEPVERITY" ]; then
# we don't keep dm-verity by default
KEEPVERITY=false
fi
if [ -z "$KEEPFORCEENCRYPT" ]; then
# we don't keep forceencrypt by default
KEEPFORCEENCRYPT=false
fi
if [ -z "$NORESTORE" ]; then
# we restore ramdisk by default
NORESTORE=false
fi
SAMSUNG=false
SAMSUNG_CHECK=$(cat /system/build.prop | grep "ro.build.fingerprint=" | grep -i "samsung")
if [ $? -eq 0 ]; then
SAMSUNG=true
fi
API=$(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
cp -af $BINDIR /data/magisk
cp -af $INSTALLER/common/init.magisk.rc $INSTALLER/common/magic_mask.sh /data/magisk
/data/magisk/busybox --install -s /data/busybox
ln -s /data/magisk/busybox /data/busybox/busybox
# Prevent issues
rm -f /data/busybox/su /data/busybox/sh
chcon -hR "u:object_r:system_file:s0" /data/magisk /data/busybox
chmod -R 755 /data/magisk /data/busybox
PATH=/data/busybox:$PATH
else
rm -rf /cache/data_bin 2>/dev/null
cp -af $BINDIR /cache/data_bin
cp -af $INSTALLER/common/init.magisk.rc $INSTALLER/common/magic_mask.sh /cache/data_bin
fi
##########################################################################################
# Image
##########################################################################################
# Fix SuperSU.....
($BOOTMODE) && $BINDIR/sepolicy-inject -s fsck --live
if (is_mounted /data); then
IMG=/data/magisk.img
else
IMG=/cache/magisk.img
ui_print "- Data unavalible, use cache workaround"
fi
if [ -f "$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 $IMG /magisk
if (! is_mounted /magisk); then
ui_print "! Image mount failed... abort"
exit 1
fi
MAGISKLOOP=$LOOPDEVICE
mkdir -p /magisk/.core/magiskhide 2>/dev/null
cp -af $INSTALLER/common/magiskhide/. /magisk/.core/magiskhide
##########################################################################################
# Boot image patch
##########################################################################################
ui_print "- Found Boot Image: $BOOTIMAGE"
rm -rf $TMPDIR/boottmp 2>/dev/null
mkdir -p $TMPDIR/boottmp
ORIGBOOT=$BOOTIMAGE
ui_print "- Unpacking boot image"
unpack_boot $ORIGBOOT
# Restore ramdisk
SUPERSU=false
if (! $NORESTORE); then
if [ -d ".backup" ]; then
# This implies Magisk is already installed, but no SuperSU
ui_print "- Restoring ramdisk with ramdisk backup"
cp -af .backup/. .
rm -rf magisk init.magisk.rc sbin/magic_mask.sh 2>/dev/null
else
[ -f "sbin/launch_daemonsu.sh" ] && SUPERSU=true
if ($SUPERSU); then
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
fi
if [ -d "magisk" ]; then
# If Magisk is installed and not SuperSU and no ramdisk backups,
# we restore previous stock boot image backups
if (! $SUPERSU); then
cp -af /data/stock_boot_*.gz /data/stock_boot.img.gz 2>/dev/null
gzip -d /data/stock_boot.img.gz 2>/dev/null
if [ -f "/data/stock_boot.img" ]; then
ui_print "- Restoring boot image with backup"
$ORIGBOOT=/data/stock_boot.img
unpack_boot $ORIGBOOT
fi
fi
# Removing possible modifications
rm -rf magisk init.magisk.rc sbin/magic_mask.sh 2>/dev/null
rm -rf init.xposed.rc sbin/mount_xposed.sh 2>/dev/null
fi
fi
fi
if (! $SUPERSU); then
# SuperSU already backup stock boot, no need to do again
ui_print "- Creating backups"
mkdir .backup 2>/dev/null
cp -af *fstab* verity_key sepolicy .backup 2>/dev/null
if (is_mounted /data); then
[ "$ORIGBOOT" != "/data/stock_boot.img" ] && dd if=$ORIGBOOT of=/data/stock_boot.img
else
dd if=$ORIGBOOT of=/cache/stock_boot.img
fi
# SuperSU already have root, no need to install root
if [ ! -d /magisk/phh ]; then
ui_print "- Installing phh's SuperUser"
mkdir -p /magisk/phh/bin
mkdir -p /magisk/phh/su.d
cp -af $INSTALLER/common/phh/. /magisk/phh
cp -af $BINDIR/su $BINDIR/sepolicy-inject /magisk/phh/bin
chmod -R 755 /magisk/phh
fi
fi
# Patch ramdisk
ui_print "- Patching ramdisk"
# Add magisk entrypoint
for INIT in init*.rc; do
if [ $(grep -c "import /init.environ.rc" $INIT) -ne "0" ] && [ `grep -c "import /init.magisk.rc" $INIT` -eq "0" ]; then
cp $INIT .backup
sed -i "/import \/init\.environ\.rc/iimport /init.magisk.rc" $INIT
break
fi
done
if (! $SUPERSU); then
sed -i "/selinux.reload_policy/d" init.rc
find . -type f -name "*fstab*" 2>/dev/null | while read FSTAB ; do
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 (! $KEEPVERITY); then
rm verity_key 2>/dev/null
fi
fi
# sepolicy patches
LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/sepolicy-inject --magisk -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
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
if (! $BOOTMODE); then
ui_print "- Unmounting partitions"
umount /magisk
losetup -d $MAGISKLOOP
umount /system
rmdir /magisk
fi
ui_print "- Done"
exit 0