Magisk/scripts/flash_script.sh
2017-06-19 00:15:44 +08:00

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#!/sbin/sh
##########################################################################################
#
# Magisk Flash Script
# by topjohnwu
#
# This script will detect, construct the environment for Magisk
# It will then call boot_patch.sh to patch the boot image
#
##########################################################################################
# Detect whether in boot mode
ps | grep zygote | grep -v grep >/dev/null && BOOTMODE=true || BOOTMODE=false
$BOOTMODE || ps -A 2>/dev/null | grep zygote | grep -v grep >/dev/null && BOOTMODE=true
# This path should work in any cases
TMPDIR=/dev/tmp
INSTALLER=$TMPDIR/magisk
BUSYBOX=$TMPDIR/busybox
COMMONDIR=$INSTALLER/common
CHROMEDIR=$INSTALLER/chromeos
COREDIR=/magisk/.core
# 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
rm -rf $TMPDIR 2>/dev/null
mkdir -p $INSTALLER $BUSYBOX
unzip -o "$ZIP" -d $INSTALLER
##########################################################################################
# Detection
##########################################################################################
# Load all fuctions
. $COMMONDIR/util_functions.sh
ui_print "************************"
ui_print "* MAGISK_VERSION_STUB"
ui_print "************************"
[ -d "$COMMONDIR" ] || abort "! Unable to extract zip file!"
ui_print "- Mounting /system(ro), /cache, /data"
mount -o ro /system 2>/dev/null
mount /cache 2>/dev/null
mount /data 2>/dev/null
[ -f /system/build.prop ] || abort "! /system could not be mounted!"
# read override variables
getvar KEEPVERITY
getvar KEEPFORCEENCRYPT
getvar BOOTIMAGE
# 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
BBPATH=armeabi-v7a
if [ "$ABI" = "x86" ]; then ARCH=x86; BBPATH=x86; fi;
if [ "$ABI2" = "x86" ]; then ARCH=x86; BBPATH=x86; fi;
if [ "$ABILONG" = "arm64-v8a" ]; then ARCH=arm64; fi;
if [ "$ABILONG" = "x86_64" ]; then ARCH=x64; BBPATH=x86; fi;
[ $API -lt 21 ] && abort "! Magisk is only for Lollipop 5.0+ (SDK 21+)"
ui_print "- Device platform: $ARCH"
BINDIR=$INSTALLER/$ARCH
chmod -R 755 $CHROMEDIR $BINDIR
find_boot_image
[ -z $BOOTIMAGE ] && abort "! Unable to detect boot image"
##########################################################################################
# Environment
##########################################################################################
ui_print "- Constructing environment"
if ! $BOOTMODE; then
# We are in custom recovery, don't trust anything in recovery, use those in /system
# Extract busybox from Magisk Manager, it's pure static binary so there will be no issues
unzip -o $COMMONDIR/magisk.apk lib/$BBPATH/libbusybox.so -d $BUSYBOX
mv $BUSYBOX/lib/*/libbusybox.so $BUSYBOX/busybox
rm -rf $BUSYBOX/lib
chmod +x $BUSYBOX/busybox
$BUSYBOX/busybox --install -s $BUSYBOX
# Prefer bin in /system, fallback to bundled busybox if a tool doesn't exist
export PATH=/system/bin:/system/xbin:$BUSYBOX
# Clear out possible lib paths, let the binary find them itself
export LD_LIBRARY_PATH=
# Temporarily block out all custom recovery binaries/libs
mv /sbin /sbin_tmp
fi
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/. $MAGISKBIN
chmod -R 755 $MAGISKBIN
chcon -hR u:object_r:system_file:s0 $MAGISKBIN
# addon.d
if [ -d /system/addon.d ]; then
ui_print "- Adding addon.d survival script"
mount -o rw,remount /system
cp $INSTALLER/addon.d/99-magisk.sh /system/addon.d/99-magisk.sh
chmod 755 /system/addon.d/99-magisk.sh
fi
##########################################################################################
# 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"
$BINDIR/magisk --createimg $IMG 64M
fi
mount_image $IMG /magisk
is_mounted /magisk || abort "! Magisk image mount failed..."
MAGISKLOOP=$LOOPDEVICE
# Core folders
mkdir -p $COREDIR/props $COREDIR/post-fs-data.d $COREDIR/service.d 2>/dev/null
chmod 755 $COREDIR/post-fs-data.d $COREDIR/service.d
chown 0.0 $COREDIR/post-fs-data.d $COREDIR/service.d
# Legacy cleanup
mv $COREDIR/magiskhide/hidelist $COREDIR/hidelist 2>/dev/null
rm -rf $COREDIR/magiskhide $COREDIR/bin
##########################################################################################
# Unpack boot
##########################################################################################
ui_print "- Found Boot Image: $BOOTIMAGE"
# Update our previous backup to new format if exists
if [ -f /data/stock_boot.img ]; then
SHA1=`$BINDIR/magiskboot --sha1 /data/stock_boot.img | tail -n 1`
STOCKDUMP=/data/stock_boot_${SHA1}.img
mv /data/stock_boot.img $STOCKDUMP
$BINDIR/magiskboot --compress $STOCKDUMP
fi
SOURCEDMODE=true
cd $MAGISKBIN
# Source the boot patcher
. $COMMONDIR/boot_patch.sh "$BOOTIMAGE"
# Sign chromeos boot
if [ -f chromeos ]; then
echo > empty
$CHROMEDIR/futility vbutil_kernel --pack new-boot.img.signed \
--keyblock $CHROMEDIR/kernel.keyblock --signprivate $CHROMEDIR/kernel_data_key.vbprivk \
--version 1 --vmlinuz new-boot.img --config empty --arch arm --bootloader empty --flags 0x1
rm -f empty new-boot.img
mv new-boot.img.signed new-boot.img
fi
[ -f stock_boot* ] && rm -f /data/stock_boot* 2>/dev/null
ui_print "- Flashing new boot image"
if [ -L "$BOOTIMAGE" ]; then
dd if=new-boot.img of="$BOOTIMAGE" bs=4096
else
cat new-boot.img /dev/zero | dd of="$BOOTIMAGE" bs=4096
fi
rm -f new-boot.img
cd /
if ! $BOOTMODE; then
mv /sbin_tmp /sbin
ui_print "- Unmounting partitions"
umount /magisk
losetup -d $MAGISKLOOP 2>/dev/null
rmdir /magisk
umount -l /system
fi
ui_print "- Done"
exit 0