Magisk/scripts/magisk_uninstaller.sh
2017-03-12 18:21:50 +08:00

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# 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
BOOTTMP=$TMPDIR/boottmp
MAGISKBIN=/data/magisk
CHROMEDIR=$MAGISKBIN/chromeos
SYSTEMLIB=/system/lib
[ -d /system/lib64 ] && SYSTEMLIB=/system/lib64
# Default permissions
umask 022
ui_print_wrapper() {
type ui_print_wrapper >/dev/null && ui_print "$1" || echo "$1"
}
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
}
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
}
# Environments
# Set permissions
chmod -R 755 $CHROMEDIR/futility $MAGISKBIN 2>/dev/null
# Temporary busybox for installation
mkdir -p $TMPDIR/busybox
$MAGISKBIN/busybox --install -s $TMPDIR/busybox
rm -f $TMPDIR/busybox/su $TMPDIR/busybox/sh $TMPDIR/busybox/reboot
PATH=$TMPDIR/busybox:$PATH
# Find the boot image
find_boot_image
if [ -z "$BOOTIMAGE" ]; then
ui_print_wrapper "! Unable to detect boot image"
exit 1
fi
ui_print_wrapper "- Found Boot Image: $BOOTIMAGE"
rm -rf $BOOTTMP 2>/dev/null
mkdir -p $BOOTTMP
cd $BOOTTMP
ui_print_wrapper "- Unpacking boot image"
LD_LIBRARY_PATH=$SYSTEMLIB $MAGISKBIN/magiskboot --unpack $BOOTIMAGE
if [ $? -ne 0 ]; then
ui_print_wrapper "! Unable to unpack boot image"
exit 1
fi
# Update our previous backup to new format if exists
if [ -f /data/stock_boot.img ]; then
SHA1=`LD_LIBRARY_PATH=$SYSTEMLIB $MAGISKBIN/magiskboot --sha1 /data/stock_boot.img | tail -n 1`
STOCKDUMP=/data/stock_boot_${SHA1}.img
mv /data/stock_boot.img $STOCKDUMP
LD_LIBRARY_PATH=$SYSTEMLIB $MAGISKBIN/magiskboot --compress $STOCKDUMP
fi
# Detect boot image state
LD_LIBRARY_PATH=$SYSTEMLIB $MAGISKBIN/magiskboot --cpio-test ramdisk.cpio
case $? in
0 )
ui_print_wrapper "! Magisk is not installed!"
ui_print_wrapper "! Nothing to uninstall"
exit
;;
1 )
# Find SHA1 of stock boot image
if [ -z $SHA1 ]; then
LD_LIBRARY_PATH=$SYSTEMLIB $MAGISKBIN/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
if [ -f ${STOCKDUMP}.gz ]; then
ui_print_wrapper "- Boot image backup found!"
LD_LIBRARY_PATH=$SYSTEMLIB $MAGISKBIN/magiskboot --decompress ${STOCKDUMP}.gz stock_boot.img
else
ui_print_wrapper "! Boot image backup unavailable"
ui_print_wrapper "- Restoring ramdisk with backup"
LD_LIBRARY_PATH=$SYSTEMLIB $MAGISKBIN/magiskboot --cpio-restore ramdisk.cpio
LD_LIBRARY_PATH=$SYSTEMLIB $MAGISKBIN/magiskboot --repack $BOOTIMAGE stock_boot.img
fi
;;
2 )
ui_print_wrapper "- SuperSU patched image detected"
LD_LIBRARY_PATH=$SYSTEMLIB $MAGISKBIN/magiskboot --cpio-restore ramdisk.cpio
LD_LIBRARY_PATH=$SYSTEMLIB $MAGISKBIN/magiskboot --repack $BOOTIMAGE stock_boot.img
;;
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 $CHROMEDIR/kernel_data_key.vbprivk --version 1 --vmlinuz new-boot.img --config config --arch arm --bootloader bootloader --flags 0x1
rm -f new-boot.img
mv new-boot.img.signed new-boot.img
fi
ui_print_wrapper "- Flashing stock/reverted image"
[ ! -L "$BOOTIMAGE" ] && dd if=/dev/zero of=$BOOTIMAGE bs=4096 2>/dev/null
dd if=stock_boot.img of=$BOOTIMAGE bs=4096
ui_print_wrapper "- Removing Magisk files"
rm -rf /cache/magisk.log /cache/last_magisk.log /cache/magiskhide.log /cache/.disable_magisk \
/cache/magisk /cache/magisk_merge /cache/magisk_mount /cache/unblock /cache/magisk_uninstaller.sh \
/data/Magisk.apk /data/magisk.apk /data/magisk.img /data/magisk_merge.img \
/data/busybox /data/magisk /data/custom_ramdisk_patch.sh 2>/dev/null
$BOOTMODE && reboot