mirror of
https://github.com/topjohnwu/Magisk.git
synced 2024-11-27 20:15:29 +00:00
371 lines
11 KiB
Bash
371 lines
11 KiB
Bash
##########################################################################################
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#
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# Magisk General Utility Functions
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# by topjohnwu
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#
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# Used everywhere in Magisk
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#
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##########################################################################################
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#MAGISK_VERSION_STUB
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SCRIPT_VERSION=$MAGISK_VER_CODE
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# Default location, will override if needed
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MAGISKBIN=/data/adb/magisk
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[ -z $MAGISKBIN ] && MOUNTPATH=/sbin/.core/img
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[ -z $IMG ] && IMG=/data/adb/magisk.img
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BOOTSIGNER="/system/bin/dalvikvm -Xnodex2oat -Xnoimage-dex2oat -cp \$APK com.topjohnwu.magisk.utils.BootSigner"
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BOOTSIGNED=false
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get_outfd() {
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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=$FD
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break
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fi
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fi
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done
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fi
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}
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ui_print() {
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$BOOTMODE && echo "$1" || echo -e "ui_print $1\nui_print" >> /proc/self/fd/$OUTFD
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}
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mount_partitions() {
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# Check A/B slot
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SLOT=`getprop ro.boot.slot_suffix`
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if [ -z $SLOT ]; then
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SLOT=_`getprop ro.boot.slot`
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[ $SLOT = "_" ] && SLOT=
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fi
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[ -z $SLOT ] || ui_print "- A/B partition detected, current slot: $SLOT"
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ui_print "- Mounting /system, /vendor"
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is_mounted /system || [ -f /system/build.prop ] || mount -o ro /system 2>/dev/null
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if ! is_mounted /system && ! [ -f /system/build.prop ]; then
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SYSTEMBLOCK=`find /dev/block -iname system$SLOT | head -n 1`
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mount -t ext4 -o ro $SYSTEMBLOCK /system
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fi
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is_mounted /system || [ -f /system/build.prop ] || abort "! Cannot mount /system"
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cat /proc/mounts | grep -E '/dev/root|/system_root' >/dev/null && SKIP_INITRAMFS=true || SKIP_INITRAMFS=false
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if [ -f /system/init.rc ]; then
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SKIP_INITRAMFS=true
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mkdir /system_root 2>/dev/null
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mount --move /system /system_root
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mount -o bind /system_root/system /system
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fi
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$SKIP_INITRAMFS && ui_print "- Device skip_initramfs detected"
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if [ -L /system/vendor ]; then
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# Seperate /vendor partition
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is_mounted /vendor || mount -o ro /vendor 2>/dev/null
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if ! is_mounted /vendor; then
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VENDORBLOCK=`find /dev/block -iname vendor$SLOT | head -n 1`
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mount -t ext4 -o ro $VENDORBLOCK /vendor
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fi
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is_mounted /vendor || abort "! Cannot mount /vendor"
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fi
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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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[ -z "$FILES" ] && FILES='/system/build.prop'
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sed -n "$REGEX" $FILES 2>/dev/null | head -n 1
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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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[ ! -z $VALUE ] && return
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for DIR in /.backup /data /cache /system; do
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VALUE=`grep_prop $VARNAME $DIR/.magisk`
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[ ! -z $VALUE ] && break;
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done
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eval $VARNAME=\$VALUE
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}
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resolve_link() {
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RESOLVED="$1"
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while RESOLVE=`readlink $RESOLVED`; do
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RESOLVED=$RESOLVE
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done
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echo $RESOLVED
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}
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find_boot_image() {
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BOOTIMAGE=
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if [ ! -z $SLOT ]; then
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BOOTIMAGE=`find /dev/block -iname boot$SLOT | head -n 1` 2>/dev/null
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else
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for BLOCK in boot_a kern-a android_boot kernel boot lnx bootimg; do
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BOOTIMAGE=`find /dev/block -iname $BLOCK | head -n 1` 2>/dev/null
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[ ! -z $BOOTIMAGE ] && break
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done
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fi
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# Recovery fallback
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if [ -z "$BOOTIMAGE" ]; then
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for FSTAB in /etc/*fstab*; do
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BOOTIMAGE=`grep -v '#' $FSTAB | grep -E '/boot[^a-zA-Z]' | grep -oE '/dev/[a-zA-Z0-9_./-]*'`
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[ ! -z $BOOTIMAGE ] && break
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done
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fi
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BOOTIMAGE=`resolve_link $BOOTIMAGE`
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}
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migrate_boot_backup() {
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# Update the broken boot backup
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if [ -f /data/stock_boot_.img.gz ]; then
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$MAGISKBIN/magiskboot --decompress /data/stock_boot_.img.gz /data/stock_boot.img
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fi
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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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ui_print "- Migrating boot image backup"
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SHA1=`$MAGISKBIN/magiskboot --sha1 /data/stock_boot.img 2>/dev/null`
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STOCKDUMP=/data/stock_boot_${SHA1}.img
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mv /data/stock_boot.img $STOCKDUMP
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$MAGISKBIN/magiskboot --compress $STOCKDUMP
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fi
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mv /data/magisk/stock_boot* /data 2>/dev/null
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mv /data/magisk/adb/stock_boot* /data 2>/dev/null
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}
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flash_boot_image() {
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# Make sure all blocks are writable
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$MAGISKBIN/magisk --unlock-blocks 2>/dev/null
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case "$1" in
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*.gz) COMMAND="gzip -d < '$1'";;
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*) COMMAND="cat '$1'";;
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esac
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$BOOTSIGNED && SIGNCOM="$BOOTSIGNER -sign" || SIGNCOM="cat -"
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case "$2" in
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/dev/block/*)
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ui_print "- Flashing new boot image"
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eval $COMMAND | eval $SIGNCOM | cat - /dev/zero 2>/dev/null | dd of="$2" bs=4096 2>/dev/null
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;;
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*)
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ui_print "- Storing new boot image"
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eval $COMMAND | eval $SIGNCOM | dd of="$2" bs=4096 2>/dev/null
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;;
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esac
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}
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find_dtbo_image() {
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DTBOIMAGE=`find /dev/block -iname dtbo$SLOT | head -n 1` 2>/dev/null
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[ ! -z $DTBOIMAGE ] && DTBOIMAGE=`resolve_link $DTBOIMAGE`
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}
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patch_dtbo_image() {
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if [ ! -z $DTBOIMAGE ]; then
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if $MAGISKBIN/magiskboot --dtb-test $DTBOIMAGE; then
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ui_print "- Backing up stock dtbo image"
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$MAGISKBIN/magiskboot --compress $DTBOIMAGE $MAGISKBIN/stock_dtbo.img.gz
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ui_print "- Patching fstab in dtbo to remove avb-verity"
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$MAGISKBIN/magiskboot --dtb-patch $DTBOIMAGE
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return 0
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fi
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fi
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return 1
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}
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restore_imgs() {
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STOCKBOOT=/data/stock_boot_${1}.img.gz
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STOCKDTBO=/data/stock_dtbo.img.gz
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# Make sure all blocks are writable
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$MAGISKBIN/magisk --unlock-blocks 2>/dev/null
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find_dtbo_image
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if [ ! -z "$DTBOIMAGE" -a -f "$STOCKDTBO" ]; then
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ui_print "- Restoring stock dtbo image"
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gzip -d < $STOCKDTBO | dd of=$DTBOIMAGE
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fi
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BOOTSIGNED=false
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find_boot_image
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if [ ! -z "$BOOTIMAGE" -a -f "$STOCKBOOT" ]; then
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ui_print "- Restoring stock boot image"
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gzip -d < $STOCKBOOT | cat - /dev/zero 2>/dev/null | dd of="$BOOTIMAGE" bs=4096 2>/dev/null
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return 0
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fi
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return 1
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}
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sign_chromeos() {
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ui_print "- Signing ChromeOS boot image"
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echo > empty
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./chromeos/futility vbutil_kernel --pack new-boot.img.signed \
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--keyblock ./chromeos/kernel.keyblock --signprivate ./chromeos/kernel_data_key.vbprivk \
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--version 1 --vmlinuz new-boot.img --config empty --arch arm --bootloader empty --flags 0x1
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rm -f empty new-boot.img
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mv new-boot.img.signed new-boot.img
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}
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is_mounted() {
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TARGET="`resolve_link $1`"
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cat /proc/mounts | grep " $TARGET " >/dev/null
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return $?
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}
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remove_system_su() {
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if [ -f /system/bin/su -o -f /system/xbin/su ] && [ ! -f /su/bin/su ]; then
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ui_print "! System installed root detected, mount rw :("
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mount -o rw,remount /system
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# SuperSU
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if [ -e /system/bin/.ext/.su ]; then
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mv -f /system/bin/app_process32_original /system/bin/app_process32 2>/dev/null
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mv -f /system/bin/app_process64_original /system/bin/app_process64 2>/dev/null
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mv -f /system/bin/install-recovery_original.sh /system/bin/install-recovery.sh 2>/dev/null
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cd /system/bin
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if [ -e app_process64 ]; then
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ln -sf app_process64 app_process
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else
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ln -sf app_process32 app_process
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fi
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fi
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rm -rf /system/.pin /system/bin/.ext /system/etc/.installed_su_daemon /system/etc/.has_su_daemon \
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/system/xbin/daemonsu /system/xbin/su /system/xbin/sugote /system/xbin/sugote-mksh /system/xbin/supolicy \
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/system/bin/app_process_init /system/bin/su /cache/su /system/lib/libsupol.so /system/lib64/libsupol.so \
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/system/su.d /system/etc/install-recovery.sh /system/etc/init.d/99SuperSUDaemon /cache/install-recovery.sh \
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/system/.supersu /cache/.supersu /data/.supersu \
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/system/app/Superuser.apk /system/app/SuperSU /cache/Superuser.apk 2>/dev/null
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fi
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}
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api_level_arch_detect() {
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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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}
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boot_actions() {
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if [ ! -d /sbin/.core/mirror/bin ]; then
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mkdir -p /sbin/.core/mirror/bin
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mount -o bind $MAGISKBIN /sbin/.core/mirror/bin
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fi
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MAGISKBIN=/sbin/.core/mirror/bin
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}
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recovery_actions() {
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# TWRP bug fix
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mount -o bind /dev/urandom /dev/random
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# Preserve environment varibles
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OLD_PATH=$PATH
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OLD_LD_PATH=$LD_LIBRARY_PATH
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if [ ! -d $TMPDIR/bin ]; then
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# Add busybox to PATH
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mkdir -p $TMPDIR/bin
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ln -s $MAGISKBIN/busybox $TMPDIR/bin/busybox
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$MAGISKBIN/busybox --install -s $TMPDIR/bin
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export PATH=$TMPDIR/bin:$PATH
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fi
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# Temporarily block out all custom recovery binaries/libs
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mv /sbin /sbin_tmp
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# Add all possible library paths
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$IS64BIT && export LD_LIBRARY_PATH=/system/lib64:/system/vendor/lib64 || export LD_LIBRARY_PATH=/system/lib:/system/vendor/lib
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}
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recovery_cleanup() {
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mv /sbin_tmp /sbin 2>/dev/null
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export LD_LIBRARY_PATH=$OLD_LD_PATH
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[ -z $OLD_PATH ] || export PATH=$OLD_PATH
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ui_print "- Unmounting partitions"
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umount -l /system_root 2>/dev/null
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umount -l /system 2>/dev/null
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umount -l /vendor 2>/dev/null
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umount -l /dev/random 2>/dev/null
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}
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abort() {
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ui_print "$1"
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$BOOTMODE || recovery_cleanup
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exit 1
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}
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set_perm() {
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chown $2:$3 $1 || exit 1
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chmod $4 $1 || exit 1
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[ -z $5 ] && chcon 'u:object_r:system_file:s0' $1 || chcon $5 $1
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}
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set_perm_recursive() {
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find $1 -type d 2>/dev/null | while read dir; do
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set_perm $dir $2 $3 $4 $6
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done
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find $1 -type f -o -type l 2>/dev/null | while read file; do
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set_perm $file $2 $3 $5 $6
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done
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}
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mktouch() {
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mkdir -p ${1%/*} 2>/dev/null
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[ -z $2 ] && touch $1 || echo $2 > $1
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chmod 644 $1
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}
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request_size_check() {
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reqSizeM=`du -s $1 | cut -f1`
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reqSizeM=$((reqSizeM / 1024 + 1))
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}
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request_zip_size_check() {
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reqSizeM=`unzip -l "$1" | tail -n 1 | awk '{ print int($1 / 1048567 + 1) }'`
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}
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image_size_check() {
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SIZE="`$MAGISKBIN/magisk --imgsize $IMG`"
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curUsedM=`echo "$SIZE" | cut -d" " -f1`
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curSizeM=`echo "$SIZE" | cut -d" " -f2`
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curFreeM=$((curSizeM - curUsedM))
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}
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mount_magisk_img() {
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[ -z reqSizeM ] && reqSizeM=0
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if [ -f "$IMG" ]; then
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ui_print "- Found $IMG"
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image_size_check $IMG
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if [ "$reqSizeM" -gt "$curFreeM" ]; then
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newSizeM=$(((reqSizeM + curUsedM) / 32 * 32 + 64))
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ui_print "- Resizing $IMG to ${newSizeM}M"
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$MAGISKBIN/magisk --resizeimg $IMG $newSizeM >&2
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fi
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else
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newSizeM=$((reqSizeM / 32 * 32 + 64));
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ui_print "- Creating $IMG with size ${newSizeM}M"
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$MAGISKBIN/magisk --createimg $IMG $newSizeM >&2
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fi
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ui_print "- Mounting $IMG to $MOUNTPATH"
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MAGISKLOOP=`$MAGISKBIN/magisk --mountimg $IMG $MOUNTPATH`
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is_mounted $MOUNTPATH || abort "! $IMG mount failed..."
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}
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unmount_magisk_img() {
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$MAGISKBIN/magisk --umountimg $MOUNTPATH $MAGISKLOOP
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# Shrink the image if possible
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image_size_check $IMG
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newSizeM=$((curUsedM / 32 * 32 + 64))
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if [ $curSizeM -gt $newSizeM ]; then
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ui_print "- Shrinking $IMG to ${newSizeM}M"
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$MAGISKBIN/magisk --resizeimg $IMG $newSizeM
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fi
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}
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