mirror of
https://github.com/topjohnwu/Magisk.git
synced 2024-11-24 10:35:26 +00:00
341 lines
9.8 KiB
Bash
341 lines
9.8 KiB
Bash
#!/sbin/sh
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##########################################################################################
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#
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# Magisk Uninstaller
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# by topjohnwu
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#
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# This zip will remove all Magisk related files and revert boot image
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#
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##########################################################################################
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INSTALLER=/tmp/uninstall
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# Boot Image Variables
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CHROMEDIR=$INSTALLER/chromeos
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NEWBOOT=$TMPDIR/boottmp/new-boot.img
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UNPACKDIR=$TMPDIR/boottmp/bootunpack
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RAMDISK=$TMPDIR/boottmp/ramdisk
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# Default permissions
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umask 022
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##########################################################################################
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# Flashable update-binary preparation
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##########################################################################################
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OUTFD=$2
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ZIP=$3
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readlink /proc/$$/fd/$OUTFD 2>/dev/null | grep /tmp >/dev/null
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if [ "$?" -eq "0" ]; then
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OUTFD=0
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for FD in `ls /proc/$$/fd`; do
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readlink /proc/$$/fd/$FD 2>/dev/null | grep pipe >/dev/null
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if [ "$?" -eq "0" ]; then
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ps | grep " 3 $FD " | grep -v grep >/dev/null
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if [ "$?" -eq "0" ]; then
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OUTFD=$FD
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break
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fi
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fi
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done
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fi
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mkdir -p $INSTALLER
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cd $INSTALLER
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unzip -o "$ZIP"
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##########################################################################################
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# Functions
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##########################################################################################
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ui_print() {
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echo -n -e "ui_print $1\n" >> /proc/self/fd/$OUTFD
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echo -n -e "ui_print\n" >> /proc/self/fd/$OUTFD
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}
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getvar() {
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local VARNAME=$1
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local VALUE=$(eval echo \$"$VARNAME");
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for FILE in /data/.magisk /cache/.magisk /system/.magisk; do
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if [ -z "$VALUE" ]; then
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LINE=$(cat $FILE 2>/dev/null | grep "$VARNAME=")
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if [ ! -z "$LINE" ]; then
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VALUE=${LINE#*=}
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fi
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fi
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done
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eval $VARNAME=\$VALUE
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}
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find_boot_image() {
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if [ -z "$BOOTIMAGE" ]; then
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for PARTITION in kern-a KERN-A android_boot ANDROID_BOOT kernel KERNEL boot BOOT lnx LNX; do
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BOOTIMAGE=`readlink /dev/block/by-name/$PARTITION || readlink /dev/block/platform/*/by-name/$PARTITION || readlink /dev/block/platform/*/*/by-name/$PARTITION`
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if [ ! -z "$BOOTIMAGE" ]; then break; fi
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done
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fi
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if [ -z "$BOOTIMAGE" ]; then
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FSTAB="/etc/recovery.fstab"
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[ ! -f "$FSTAB" ] && FSTAB="/etc/recovery.fstab.bak"
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[ -f "$FSTAB" ] && BOOTIMAGE=`grep -E '\b/boot\b' "$FSTAB" | grep -oE '/dev/[a-zA-Z0-9_./-]*'`
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fi
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}
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is_mounted() {
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if [ ! -z "$2" ]; then
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cat /proc/mounts | grep $1 | grep $2, >/dev/null
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else
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cat /proc/mounts | grep $1 >/dev/null
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fi
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return $?
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}
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grep_prop() {
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REGEX="s/^$1=//p"
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shift
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FILES=$@
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if [ -z "$FILES" ]; then
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FILES='/system/build.prop'
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fi
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cat $FILES 2>/dev/null | sed -n $REGEX | head -n 1
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}
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mount_image() {
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if [ ! -d "$2" ]; then
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mount -o rw,remount rootfs /
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mkdir -p $2 2>/dev/null
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($BOOTMODE) && mount -o ro,remount rootfs /
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[ ! -d "$2" ] && return 1
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fi
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if (! is_mounted $2); then
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LOOPDEVICE=
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for LOOP in 0 1 2 3 4 5 6 7; do
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if (! is_mounted $2); then
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LOOPDEVICE=/dev/block/loop$LOOP
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if [ ! -f "$LOOPDEVICE" ]; then
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mknod $LOOPDEVICE b 7 $LOOP 2>/dev/null
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fi
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losetup $LOOPDEVICE $1
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if [ "$?" -eq "0" ]; then
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mount -t ext4 -o loop $LOOPDEVICE $2
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if (! is_mounted $2); then
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/system/bin/toolbox mount -t ext4 -o loop $LOOPDEVICE $2
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fi
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if (! is_mounted $2); then
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/system/bin/toybox mount -t ext4 -o loop $LOOPDEVICE $2
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fi
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fi
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if (is_mounted $2); then
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ui_print "- Mounting $1 to $2"
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break;
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fi
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fi
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done
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fi
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}
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unpack_boot() {
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rm -rf $UNPACKDIR $RAMDISK 2>/dev/null
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mkdir -p $UNPACKDIR
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mkdir -p $RAMDISK
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cd $UNPACKDIR
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LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/bootimgtools --extract $1
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cd $RAMDISK
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gunzip -c < $UNPACKDIR/ramdisk.gz | cpio -i
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}
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repack_boot() {
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cd $RAMDISK
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find . | cpio -o -H newc 2>/dev/null | gzip -9 > $UNPACKDIR/ramdisk.gz
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cd $UNPACKDIR
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LD_LIBRARY_PATH=$SYSTEMLIB $BINDIR/bootimgtools --repack $BOOTIMAGE
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if [ -f chromeos ]; then
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echo " " > config
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echo " " > bootloader
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LD_LIBRARY_PATH=$SYSTEMLIB $CHROMEDIR/futility vbutil_kernel --pack new-boot.img.signed --keyblock $CHROMEDIR/kernel.keyblock --signprivate $CHROMEDIR/kernel_data_key.vbprivk --version 1 --vmlinuz new-boot.img --config config --arch arm --bootloader bootloader --flags 0x1
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rm -f new-boot.img
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mv new-boot.img.signed new-boot.img
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fi
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if ($SAMSUNG); then
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SAMSUNG_CHECK=$(cat new-boot.img | grep SEANDROIDENFORCE)
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if [ $? -ne 0 ]; then
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echo -n "SEANDROIDENFORCE" >> new-boot.img
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fi
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fi
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if ($LGE_G); then
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# Prevent secure boot error on LG G2/G3.
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# Just for know, It's a pattern which bootloader verifies at boot. Thanks to LG hackers.
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echo -n -e "\x41\xa9\xe4\x67\x74\x4d\x1d\x1b\xa4\x29\xf2\xec\xea\x65\x52\x79" >> new-boot.img
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fi
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mv new-boot.img $NEWBOOT
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}
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revert_boot() {
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rm -rf $TMPDIR/boottmp 2>/dev/null
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mkdir -p $TMPDIR/boottmp
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ui_print "- Unpacking boot image"
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unpack_boot $BOOTIMAGE
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SUPERSU=false
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[ -f sbin/launch_daemonsu.sh ] && SUPERSU=true
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if ($SUPERSU); then
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ui_print "- SuperSU patched boot detected!"
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SUIMG=/data/su.img
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mount_image $SUIMG /su
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if (is_mounted /su); then
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SUPERSULOOP=$LOOPDEVICE
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gunzip -c < $UNPACKDIR/ramdisk.gz > $UNPACKDIR/ramdisk
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ui_print "- Using sukernel to restore ramdisk"
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# Restore ramdisk
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LD_LIBRARY_PATH=$SYSTEMLIB /su/bin/sukernel --cpio-restore $UNPACKDIR/ramdisk $UNPACKDIR/ramdisk
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if [ $? -ne 0 ]; then
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ui_print "! Unable to restore ramdisk"
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ui_print "! Will still remove Magisk additions"
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fi
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rm -rf $RAMDISK
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mkdir -p $RAMDISK
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cd $RAMDISK
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cpio -i < $UNPACKDIR/ramdisk
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rm -f $UNPACKDIR/ramdisk
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fi
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elif [ -d ".backup" ]; then
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ui_print "- Restoring ramdisk with backup"
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cp -af .backup/. .
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else
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ui_print "! No ramdisk backup found"
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ui_print "! Will still remove Magisk additions"
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fi
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# Remove possible boot modifications
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rm -rf magisk init.magisk.rc sbin/magic_mask.sh .backup 2>/dev/null
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ui_print "- Repacking boot image"
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repack_boot
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}
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##########################################################################################
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# Main
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##########################################################################################
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ui_print "*****************************"
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ui_print " Magisk Uninstaller "
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ui_print "*****************************"
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if [ ! -d "$INSTALLER/arm" ]; then
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ui_print "! Failed: Unable to extract zip file!"
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exit 1
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fi
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ui_print "- Mounting /system(ro), /cache, /data"
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mount -o ro /system 2>/dev/null
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mount /cache 2>/dev/null
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mount /data 2>/dev/null
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if [ ! -f '/system/build.prop' ]; then
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ui_print "! Failed: /system could not be mounted!"
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exit 1
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fi
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SAMSUNG=false
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SAMSUNG_CHECK=$(cat /system/build.prop | grep "ro.build.fingerprint=" | grep -i "samsung")
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if [ $? -eq 0 ]; then
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SAMSUNG=true
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fi
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LGE_G=false
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RBRAND=$(grep_prop ro.product.brand)
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RMODEL=$(grep_prop ro.product.device)
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if [ "$RBRAND" = "lge" ] || [ "$RBRAND" = "LGE" ]; then
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if [ "$RMODEL" = "*D80*" ] ||
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[ "$RMODEL" = "*S98*" ] ||
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[ "$RMODEL" = "*D85*" ] ||
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[ "$RMODEL" = "*F40*" ]; then
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LGE_G=true
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ui_print "! Bump device detected"
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fi
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fi
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API=$(grep_prop ro.build.version.sdk)
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ABI=$(grep_prop ro.product.cpu.abi | cut -c-3)
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ABI2=$(grep_prop ro.product.cpu.abi2 | cut -c-3)
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ABILONG=$(grep_prop ro.product.cpu.abi)
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ARCH=arm
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IS64BIT=false
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if [ "$ABI" = "x86" ]; then ARCH=x86; fi;
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if [ "$ABI2" = "x86" ]; then ARCH=x86; fi;
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if [ "$ABILONG" = "arm64-v8a" ]; then ARCH=arm64; IS64BIT=true; fi;
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if [ "$ABILONG" = "x86_64" ]; then ARCH=x64; IS64BIT=true; fi;
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ui_print "- Device platform: $ARCH"
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BINDIR=$INSTALLER/$ARCH
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chmod -R 755 $CHROMEDIR/futility $BINDIR
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SYSTEMLIB=/system/lib
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($IS64BIT) && SYSTEMLIB=/system/lib64
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find_boot_image
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if [ -z "$BOOTIMAGE" ]; then
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ui_print "! Unable to detect boot image"
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exit 1
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fi
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##########################################################################################
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# Detection all done, start installing
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##########################################################################################
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ui_print "- Found Boot Image: $BOOTIMAGE"
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if (is_mounted /data); then
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PATH=/data/busybox:$PATH
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cp -f /data/stock_boot_*.gz /data/stock_boot.img.gz 2>/dev/null
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gunzip -d < /data/stock_boot.img.gz > /data/stock_boot.img 2>/dev/null
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rm -f /data/stock_boot.img.gz 2>/dev/null
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if [ -f /data/stock_boot.img ]; then
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ui_print "- Boot image backup found!"
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NEWBOOT=/data/stock_boot.img
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else
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ui_print "! Boot image backup unavalible, try using ramdisk backup"
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revert_boot
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fi
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ui_print "- Removing Magisk files"
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rm -rf /cache/magisk.log /cache/last_magisk.log /cache/magiskhide.log \
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/cache/magisk /cache/magisk_merge /cache/magisk_mount /cache/unblock \
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/data/Magisk.apk /data/magisk.apk /data/magisk.img /data/magisk_merge.img \
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/data/busybox /data/magisk /data/custom_ramdisk_patch.sh 2>/dev/null
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else
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ui_print "! Data unavailable"
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ui_print "! Impossible to restore original boot image"
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ui_print "! Try using ramdisk backup"
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revert_boot
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ui_print "- Removing Magisk files"
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rm -rf /cache/magisk.log /cache/last_magisk.log /cache/magiskhide.log \
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/cache/magisk /cache/magisk_merge /cache/magisk_mount /cache/unblock 2>/dev/null
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ui_print "*****************************************"
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ui_print " Magisk is not fully removed yet "
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ui_print " Please manually remove /data/magisk.img "
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ui_print "*****************************************"
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fi
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chmod 644 $NEWBOOT
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ui_print "- Flashing reverted image"
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[ ! -L "$BOOTIMAGE" ] && dd if=/dev/zero of=$BOOTIMAGE bs=4096 2>/dev/null
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dd if=$NEWBOOT of=$BOOTIMAGE bs=4096
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umount /system
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if [ ! -z $SUPERSU ]; then
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umount /su
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losetup -d $SUPERSULOOP
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rmdir /su
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fi
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ui_print "- Done"
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exit 0
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