forked from MarcoBuster/Magisk
154 lines
4.9 KiB
Bash
154 lines
4.9 KiB
Bash
#!/system/bin/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 script can be placed in /cache/magisk_uninstaller.sh
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# The Magisk main binary will pick up the script, and uninstall itself, following a reboot
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# This script can also be used in flashable zip with the uninstaller_loader.sh
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#
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# This script will try to do restoration with the following:
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# 1-1. Find and restore the original stock boot image dump (OTA proof)
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# 1-2. If 1-1 fails, restore ramdisk from the internal backup
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# (ramdisk fully restored, not OTA friendly)
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# 1-3. If 1-2 fails, it will remove added files in ramdisk, however modified files
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# are remained modified, because we have no backups. By doing so, Magisk will
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# not be started at boot, but this isn't actually 100% cleaned up
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# 2. Remove all Magisk related files
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# (The list is LARGE, most likely due to bad decision in early versions
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# the latest versions has much less bloat to cleanup)
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#
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##########################################################################################
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# Call ui_print_wrap if exists, or else simply use echo
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# Useful when wrapped in flashable zip
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ui_print_wrap() {
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type ui_print >/dev/null 2>&1 && ui_print "$1" || echo "$1"
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}
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# Call abort if exists, or else show error message and exit
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# Essential when wrapped in flashable zip
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abort_wrap() {
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type abort >/dev/null 2>&1
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if [ $? -ne 0 ]; then
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ui_print_wrap "$1"
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exit 1
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else
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abort "$1"
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fi
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}
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if [ ! -d $MAGISKBIN -o ! -f $MAGISKBIN/magiskboot -o ! -f $MAGISKBIN/util_functions.sh ]; then
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ui_print_wrap "! Cannot find $MAGISKBIN"
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exit 1
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fi
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[ -z $BOOTMODE ] && BOOTMODE=false
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MAGISKBIN=/data/magisk
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CHROMEDIR=$MAGISKBIN/chromeos
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# Default permissions
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umask 022
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# Load utility functions
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. $MAGISKBIN/util_functions.sh
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# Find the boot image
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find_boot_image
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[ -z $BOOTIMAGE ] && abort "! Unable to detect boot image"
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ui_print_wrap "- Found Boot Image: $BOOTIMAGE"
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cd $MAGISKBIN
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ui_print_wrap "- Unpacking boot image"
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./magiskboot --unpack "$BOOTIMAGE"
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CHROMEOS=false
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case $? in
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1 )
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abort_wrap "! Unable to unpack boot image"
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;;
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2 )
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CHROMEOS=true
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;;
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3 )
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ui_print_wrap "! Sony ELF32 format detected"
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abort_wrap "! Please use BootBridge from @AdrianDC to flash Magisk"
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;;
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4 )
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ui_print_wrap "! Sony ELF64 format detected"
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abort_wrap "! Stock kernel cannot be patched, please use a custom kernel"
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esac
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# Update our previous backup to new format if exists
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if [ -f /data/stock_boot.img ]; then
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SHA1=`./magiskboot --sha1 /data/stock_boot.img 2>/dev/null`
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STOCKDUMP=/data/stock_boot_${SHA1}.img
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mv /data/stock_boot.img $STOCKDUMP
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./magiskboot --compress $STOCKDUMP
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fi
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# Detect boot image state
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./magiskboot --cpio-test ramdisk.cpio
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case $? in
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0 ) # Stock boot
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ui_print_wrap "- Stock boot image detected!"
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ui_print_wrap "! Magisk is not installed!"
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exit
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;;
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1 ) # Magisk patched
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ui_print_wrap "- Magisk patched image detected!"
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# Find SHA1 of stock boot image
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if [ -z $SHA1 ]; then
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./magiskboot --cpio-extract ramdisk.cpio init.magisk.rc init.magisk.rc.old
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SHA1=`grep_prop "# STOCKSHA1" init.magisk.rc.old`
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rm -f init.magisk.rc.old
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fi
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[ ! -z $SHA1 ] && STOCKDUMP=/data/stock_boot_${SHA1}.img
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if [ -f ${STOCKDUMP}.gz ]; then
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ui_print_wrap "- Boot image backup found!"
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./magiskboot --decompress ${STOCKDUMP}.gz stock_boot.img
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else
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ui_print_wrap "! Boot image backup unavailable"
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ui_print_wrap "- Restoring ramdisk with backup"
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./magiskboot --cpio-restore ramdisk.cpio
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./magiskboot --repack $BOOTIMAGE stock_boot.img
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fi
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;;
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2 ) # Other patched
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ui_print_wrap "! Boot image patched by other programs!"
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abort_wrap "! Cannot uninstall with this uninstaller"
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;;
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esac
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# Sign chromeos boot
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if $CHROMEOS; then
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echo > empty
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./chromeos/futility vbutil_kernel --pack stock_boot.img.signed \
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--keyblock ./chromeos/kernel.keyblock --signprivate ./chromeos/kernel_data_key.vbprivk \
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--version 1 --vmlinuz stock_boot.img --config empty --arch arm --bootloader empty --flags 0x1
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rm -f empty stock_boot.img
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mv stock_boot.img.signed stock_boot.img
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fi
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ui_print_wrap "- Flashing stock/reverted image"
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if [ -L "$BOOTIMAGE" ]; then
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dd if=stock_boot.img of="$BOOTIMAGE" bs=4096
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else
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cat stock_boot.img /dev/zero | dd of="$BOOTIMAGE" bs=4096 >/dev/null 2>&1
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fi
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rm -f stock_boot.img
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ui_print_wrap "- Removing Magisk files"
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rm -rf /cache/magisk.log /cache/last_magisk.log /cache/magiskhide.log /cache/.disable_magisk \
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/cache/magisk /cache/magisk_merge /cache/magisk_mount /cache/unblock /cache/magisk_uninstaller.sh \
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/data/Magisk.apk /data/magisk.apk /data/magisk.img /data/magisk_merge.img /data/magisk_debug.log \
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/data/busybox /data/magisk /data/custom_ramdisk_patch.sh /data/property/*magisk* \
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/data/app/com.topjohnwu.magisk* /data/user/*/com.topjohnwu.magisk 2>/dev/null
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$BOOTMODE && reboot
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