Magisk/scripts/magic_mask.sh

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#!/system/bin/sh
LOGFILE=/cache/magisk.log
IMG=/data/magisk.img
MOUNTPOINT=/magisk
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COREDIR=$MOUNTPOINT/.core
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TMPDIR=/dev/magisk
DUMMDIR=$TMPDIR/dummy
MIRRDIR=$TMPDIR/mirror
MOUNTINFO=$TMPDIR/mnt
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# Use the included busybox for maximum compatibility and reliable results
# e.g. we rely on the option "-c" for cp (reserve contexts), and -exec for find
TOOLPATH=/data/busybox
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BINPATH=/data/magisk
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export OLDPATH=$PATH
export PATH=$TOOLPATH:$OLDPATH
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# Default permissions
umask 022
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log_print() {
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echo "$1"
echo "$1" >> $LOGFILE
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log -p i -t Magisk "$1"
}
mktouch() {
mkdir -p ${1%/*} 2>/dev/null
if [ -z "$2" ]; then
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touch "$1" 2>/dev/null
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else
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echo "$2" > "$1" 2>/dev/null
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fi
}
unblock() {
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touch /dev/.magisk.unblock
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exit
}
run_scripts() {
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BASE=$MOUNTPOINT
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for MOD in $BASE/* ; do
if [ ! -f "$MOD/disable" ]; then
if [ -f "$MOD/$1.sh" ]; then
chmod 755 $MOD/$1.sh
chcon "u:object_r:system_file:s0" "$MOD/$1.sh"
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log_print "$1: $MOD/$1.sh"
sh $MOD/$1.sh
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fi
fi
done
}
loopsetup() {
LOOPDEVICE=
for DEV in $(ls /dev/block/loop*); do
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if [ `losetup $DEV $1 >/dev/null 2>&1; echo $?` -eq 0 ]; then
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LOOPDEVICE=$DEV
break
fi
done
}
target_size_check() {
e2fsck -p -f $1
curBlocks=`e2fsck -n $1 2>/dev/null | cut -d, -f3 | cut -d\ -f2`;
curUsedM=$((`echo "$curBlocks" | cut -d/ -f1` * 4 / 1024));
curSizeM=$((`echo "$curBlocks" | cut -d/ -f2` * 4 / 1024));
curFreeM=$((curSizeM - curUsedM));
}
travel() {
cd "$1/$2"
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if [ -f ".replace" ]; then
rm -rf "$MOUNTINFO/$2"
mktouch "$MOUNTINFO/$2" "$1"
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else
for ITEM in * ; do
if [ ! -e "/$2/$ITEM" ]; then
# New item found
if [ "$2" = "system" ]; then
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# We cannot add new items to /system root, delete it
rm -rf "$ITEM"
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else
# If we are in a higher level, delete the lower levels
rm -rf "$MOUNTINFO/dummy/$2"
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# Mount the dummy parent
mktouch "$MOUNTINFO/dummy/$2"
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if [ -d "$ITEM" ]; then
# Create new dummy directory and mount it
mkdir -p "$DUMMDIR/$2/$ITEM"
mktouch "$MOUNTINFO/$2/$ITEM" "$1"
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elif [ -L "$ITEM" ]; then
# Symlinks are small, copy them
mkdir -p "$DUMMDIR/$2" 2>/dev/null
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cp -afc "$ITEM" "$DUMMDIR/$2/$ITEM"
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else
# Create new dummy file and mount it
mktouch "$DUMMDIR/$2/$ITEM"
mktouch "$MOUNTINFO/$2/$ITEM" "$1"
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fi
fi
else
if [ -d "$ITEM" ]; then
# It's an directory, travel deeper
(travel "$1" "$2/$ITEM")
elif [ ! -L "$ITEM" ]; then
# Mount this file
mktouch "$MOUNTINFO/$2/$ITEM" "$1"
fi
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fi
done
fi
}
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clone_dummy() {
for ITEM in "$1/"* ; do
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if [ ! -e "$DUMMDIR$ITEM" ]; then
if [ ! -d "$MOUNTINFO$ITEM" ]; then
if [ -d "$ITEM" ]; then
# Create dummy directory
mkdir -p "$DUMMDIR$ITEM"
elif [ -L "$ITEM" ]; then
# Symlinks are small, copy them
cp -afc "$ITEM" "$DUMMDIR$ITEM"
else
# Create dummy file
mktouch "$DUMMDIR$ITEM"
fi
chcon -f "u:object_r:system_file:s0" "$DUMMDIR$ITEM"
else
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# Need to clone a skeleton
(clone_dummy "$ITEM")
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fi
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elif [ -d "$DUMMDIR$ITEM" ]; then
# Need to clone a skeleton
(clone_dummy "$ITEM")
fi
done
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}
bind_mount() {
if [ -e "$1" -a -e "$2" ]; then
mount -o bind $1 $2
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if [ "$?" -eq "0" ]; then
log_print "Mount: $1"
else
log_print "Mount Fail: $1"
fi
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fi
}
merge_image() {
if [ -f "$1" ]; then
log_print "$1 found"
if [ -f "$IMG" ]; then
log_print "$IMG found, attempt to merge"
# Handle large images
target_size_check $1
MERGEUSED=$curUsedM
target_size_check $IMG
if [ "$MERGEUSED" -gt "$curFreeM" ]; then
NEWDATASIZE=$((((MERGEUSED + curUsedM) / 32 + 2) * 32))
log_print "Expanding $IMG to ${NEWDATASIZE}M..."
resize2fs $IMG ${NEWDATASIZE}M
fi
# Start merging
mkdir /cache/data_img
mkdir /cache/merge_img
# setup loop devices
loopsetup $IMG
LOOPDATA=$LOOPDEVICE
log_print "$LOOPDATA $IMG"
loopsetup $1
LOOPMERGE=$LOOPDEVICE
log_print "$LOOPMERGE $1"
if [ ! -z "$LOOPDATA" ]; then
if [ ! -z "$LOOPMERGE" ]; then
# if loop devices have been setup, mount images
OK=true
if [ `mount -t ext4 -o rw,noatime $LOOPDATA /cache/data_img >/dev/null 2>&1; echo $?` -ne 0 ]; then
OK=false
fi
if [ `mount -t ext4 -o rw,noatime $LOOPMERGE /cache/merge_img >/dev/null 2>&1; echo $?` -ne 0 ]; then
OK=false
fi
if ($OK); then
# Merge (will reserve selinux contexts)
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cd /cache/merge_img
for MOD in *; do
if [ "$MOD" != "lost+found" ]; then
log_print "Merging: $MOD"
rm -rf /cache/data_img/$MOD
fi
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done
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cp -afc . /cache/data_img
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log_print "Merge complete"
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cd /
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fi
umount /cache/data_img
umount /cache/merge_img
fi
fi
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losetup -d $LOOPDATA
losetup -d $LOOPMERGE
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rmdir /cache/data_img
rmdir /cache/merge_img
else
log_print "Moving $1 to $IMG "
mv $1 $IMG
fi
rm -f $1
fi
}
case $1 in
post-fs )
mv $LOGFILE /cache/last_magisk.log
touch $LOGFILE
chmod 644 $LOGFILE
# No more cache mods!
# Only for multirom!
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log_print "** Magisk post-fs mode running..."
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# Cleanup previous version stuffs...
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rm -rf /cache/magisk /cache/magisk_merge /cache/magiskhide.log
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if [ -d "/cache/magisk_mount" ]; then
log_print "Mounting cache files"
find /cache/magisk_mount -type f 2>/dev/null | while read ITEM ; do
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chmod 644 "$ITEM"
chcon "u:object_r:system_file:s0" "$ITEM"
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TARGET="${ITEM#/cache/magisk_mount}"
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bind_mount "$ITEM" "$TARGET"
done
fi
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unblock
;;
post-fs-data )
if [ `mount | grep " /data " >/dev/null 2>&1; echo $?` -ne 0 ]; then
# /data not mounted yet, we will be called again later
unblock
fi
if [ `mount | grep " /data " | grep "tmpfs" >/dev/null 2>&1; echo $?` -eq 0 ]; then
# /data not mounted yet, we will be called again later
unblock
fi
# Don't run twice
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if [ "`getprop magisk.restart_pfsd`" != "1" ]; then
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log_print "** Magisk post-fs-data mode running..."
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# Cache support
if [ -d "/cache/data_bin" ]; then
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rm -rf $BINPATH $TOOLPATH
mkdir -p $TOOLPATH
mv /cache/data_bin $BINPATH
chmod -R 755 $BINPATH $TOOLPATH
$BINPATH/busybox --install -s $TOOLPATH
ln -s $BINPATH/busybox $TOOLPATH/busybox
# Prevent issues
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rm -f $TOOLPATH/su $TOOLPATH/sh
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fi
mv /cache/stock_boot.img /data 2>/dev/null
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find $BINPATH -exec chcon -h "u:object_r:system_file:s0" {} \;
find $TOOLPATH -exec chcon -h "u:object_r:system_file:s0" {} \;
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chmod -R 755 $BINPATH $TOOLPATH
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# Live patch sepolicy
$BINPATH/sepolicy-inject --live -s su
# Multirom functions should go here, not available right now
MULTIROM=false
# Image merging
chmod 644 $IMG /cache/magisk.img /data/magisk_merge.img 2>/dev/null
merge_image /cache/magisk.img
merge_image /data/magisk_merge.img
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# Mount magisk.img
[ ! -d "$MOUNTPOINT" ] && mkdir -p $MOUNTPOINT
if [ `cat /proc/mounts | grep $MOUNTPOINT >/dev/null 2>&1; echo $?` -ne 0 ]; then
loopsetup $IMG
if [ ! -z "$LOOPDEVICE" ]; then
mount -t ext4 -o rw,noatime,suid $LOOPDEVICE $MOUNTPOINT
fi
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fi
if [ `cat /proc/mounts | grep $MOUNTPOINT >/dev/null 2>&1; echo $?` -ne 0 ]; then
log_print "magisk.img mount failed, nothing to do :("
unblock
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fi
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# Remove empty directories, legacy paths and symlinks
rm -rf $COREDIR/bin $COREDIR/dummy $COREDIR/mirror
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find $MOUNTPOINT -type d -depth ! -path "*core*" -exec rmdir {} \; 2>/dev/null
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# Remove modules
for MOD in $MOUNTPOINT/* ; do
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if [ -f "$MOD/remove" ] || [ "$MOD" = "zzsupersu" ]; then
log_print "Remove module: $MOD"
rm -rf $MOD
fi
done
# Unmount, shrink, remount
if [ `umount $MOUNTPOINT >/dev/null 2>&1; echo $?` -eq 0 ]; then
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losetup -d $LOOPDEVICE
target_size_check $IMG
NEWDATASIZE=$(((curUsedM / 32 + 2) * 32))
if [ "$curSizeM" -gt "$NEWDATASIZE" ]; then
log_print "Shrinking $IMG to ${NEWDATASIZE}M..."
resize2fs $IMG ${NEWDATASIZE}M
fi
loopsetup $IMG
if [ ! -z "$LOOPDEVICE" ]; then
mount -t ext4 -o rw,noatime,suid $LOOPDEVICE $MOUNTPOINT
fi
if [ `cat /proc/mounts | grep $MOUNTPOINT >/dev/null 2>&1; echo $?` -ne 0 ]; then
log_print "magisk.img mount failed, nothing to do :("
unblock
fi
fi
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log_print "Preparing modules"
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mkdir -p $DUMMDIR
mkdir -p $MIRRDIR/system
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# Travel through all mods, all magic happens here
for MOD in $MOUNTPOINT/* ; do
if [ -f "$MOD/auto_mount" -a -d "$MOD/system" -a ! -f "$MOD/disable" ]; then
(travel $MOD system)
fi
done
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# Proper permissions for generated items
find $TMPDIR -exec chcon -h "u:object_r:system_file:s0" {} \;
# linker(64), t*box required
if [ -f "$MOUNTINFO/dummy/system/bin" ]; then
cd /system/bin
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cp -afc linker* t*box $DUMMDIR/system/bin/
fi
# Some libraries are required
LIBS="libc++.so libc.so libcutils.so libm.so libstdc++.so libcrypto.so liblog.so libpcre.so libselinux.so libpackagelistparser.so"
if [ -f "$MOUNTINFO/dummy/system/lib" ]; then
cd /system/lib
cp -afc $LIBS $DUMMDIR/system/lib
# Crash prevention!!
rm -f $COREDIR/magiskhide/enable 2>/dev/null
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fi
if [ -f "$MOUNTINFO/dummy/system/lib64" ]; then
cd /system/lib64
cp -afc $LIBS $DUMMDIR/system/lib64
# Crash prevention!!
rm -f $COREDIR/magiskhide/enable 2>/dev/null
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fi
# vendor libraries are device dependent, had no choice but copy them all if needed....
if [ -f "$MOUNTINFO/dummy/system/vendor" ]; then
cp -afc /system/vendor/lib/. $DUMMDIR/system/vendor/lib
[ -d "/system/vendor/lib64" ] && cp -afc /system/vendor/lib64/. $DUMMDIR/system/vendor/lib64
fi
if [ -f "$MOUNTINFO/dummy/system/vendor/lib" ]; then
cp -afc /system/vendor/lib/. $DUMMDIR/system/vendor/lib
fi
if [ -f "$MOUNTINFO/dummy/system/vendor/lib64" ]; then
cp -afc /system/vendor/lib64/. $DUMMDIR/system/vendor/lib64
fi
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# Remove crap folder
rm -rf $MOUNTPOINT/lost+found
# Start doing tasks
# Stage 1
log_print "Bind mount dummy system"
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find $MOUNTINFO/dummy -type f 2>/dev/null | while read ITEM ; do
TARGET=${ITEM#$MOUNTINFO/dummy}
ORIG="$DUMMDIR$TARGET"
clone_dummy "$TARGET"
bind_mount "$ORIG" "$TARGET"
done
# Stage 2
log_print "Bind mount module items"
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find $MOUNTINFO/system -type f 2>/dev/null | while read ITEM ; do
TARGET=${ITEM#$MOUNTINFO}
ORIG=`cat $ITEM`$TARGET
bind_mount $ORIG $TARGET
rm -f $DUMMDIR${TARGET%/*}/.dummy 2>/dev/null
done
# Run scripts
run_scripts post-fs-data
# Bind hosts for Adblock apps
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if [ -f "$COREDIR/hosts" ]; then
log_print "Enabling systemless hosts file support"
bind_mount $COREDIR/hosts /system/etc/hosts
fi
# Expose busybox
if [ -f "$COREDIR/busybox/enable" ]; then
log_print "Enabling BusyBox"
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cp -afc /data/busybox/. $COREDIR/busybox
cp -afc /system/xbin/. $COREDIR/busybox
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chmod -R 755 $COREDIR/busybox
chcon -hR "u:object_r:system_file:s0" $COREDIR/busybox
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bind_mount $COREDIR/busybox /system/xbin
fi
# Stage 3
log_print "Bind mount system mirror"
bind_mount /system $MIRRDIR/system
# Stage 4
log_print "Bind mount mirror items"
# Find all empty directores and dummy files, they should be mounted by original files in /system
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TOOLPATH=/data/busybox find $DUMMDIR -type d \
-exec sh -c '[ -z "`ls -A $1`" ] && echo $1' -- {} \; \
-o \( -type f -size 0 -print \) | \
while read ITEM ; do
ORIG=${ITEM/dummy/mirror}
TARGET=${ITEM#$DUMMDIR}
bind_mount $ORIG $TARGET
done
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# Restart post-fs-data if necessary (multirom)
($MULTIROM) && setprop magisk.restart_pfsd 1
fi
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unblock
;;
service )
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# Version info
MAGISK_VERSION_STUB
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log_print "** Magisk late_start service mode running..."
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run_scripts service
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# Magisk Hide
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if [ -f "$COREDIR/magiskhide/enable" ]; then
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log_print "** Removing tampered read-only system props"
VERIFYBOOT=`getprop ro.boot.verifiedbootstate`
FLASHLOCKED=`getprop ro.boot.flash.locked`
VERITYMODE=`getprop ro.boot.veritymode`
[ ! -z "$VERIFYBOOT" -a "$VERIFYBOOT" != "green" ] && log_print "`$BINPATH/resetprop -v -n ro.boot.verifiedbootstate green`"
[ ! -z "$FLASHLOCKED" -a "$FLASHLOCKED" != "1" ] && log_print "`$BINPATH/resetprop -v -n ro.boot.flash.locked 1`"
[ ! -z "$VERITYMODE" -a "$VERITYMODE" != "enforcing" ] && log_print "`$BINPATH/resetprop -v -n ro.boot.veritymode enforcing`"
mktouch $COREDIR/magiskhide/hidelist
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chmod -R 755 $COREDIR/magiskhide
# Add Safety Net preset
$COREDIR/magiskhide/add com.google.android.gms.unstable
log_print "** Starting Magisk Hide"
/data/magisk/magiskhide
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fi
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;;
esac