Magisk/scripts/flash_script.sh
2017-06-16 15:27:28 +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
##########################################################################################
# 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 android_boot kernel boot lnx; do
BOOTIMAGE=`find /dev/block -iname "$PARTITION" | head -n 1`
[ ! -z $BOOTIMAGE ] && break
done
fi
# Recovery fallback
if [ -z "$BOOTIMAGE" ]; then
for FSTAB in /etc/*fstab*; do
BOOTIMAGE=`grep -E '\b/boot\b' $FSTAB | grep -oE '/dev/[a-zA-Z0-9_./-]*'`
[ ! -z $BOOTIMAGE ] && break
done
fi
[ -L "$BOOTIMAGE" ] && BOOTIMAGE=`readlink $BOOTIMAGE`
}
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
[ -e $LOOPDEVICE ] || mknod $LOOPDEVICE b 7 $LOOP 2>/dev/null
losetup $LOOPDEVICE "$1" && mount -t ext4 -o loop $LOOPDEVICE "$2"
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
}
abort() {
ui_print "$1"
mv /sbin_tmp /sbin 2>/dev/null
exit 1
}
##########################################################################################
# Detection
##########################################################################################
ui_print "************************"
ui_print "* MAGISK_VERSION_STUB"
ui_print "************************"
[ -d "$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
##########################################################################################
# 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 $CHROMEDIR/kernel_data_key.vbprivk \
--version 1 --vmlinuz new-boot.img --config empty --arch arm --bootloader empty --flags 0x1
rm -f empty new-boot.img
mv new-boot.img.signed new-boot.img
fi
if is_mounted /data; then
rm -f /data/stock_boot* 2>/dev/null
mv stock_boot* /data 2>/dev/null
fi
ui_print "- Flashing new boot image"
if [ -L "$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