mirror of
https://github.com/topjohnwu/Magisk.git
synced 2025-02-26 01:47:24 +00:00
1e3586621b
1. It seems that many part of the system is upset about symlinks, revert to bind mounts 2. New system and vendor mirror implementation found, no need to copy anything 3. Thanks to the new mirror implementation, adding new items to /system and /vendor is now possible 4. Re-written some coding style
464 lines
13 KiB
Bash
464 lines
13 KiB
Bash
#!/system/bin/sh
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LOGFILE=/cache/magisk.log
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IMG=/data/magisk.img
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MOUNTPOINT=/magisk
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COREDIR=$MOUNTPOINT/.core
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TMPDIR=/dev/magisk
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DUMMDIR=$TMPDIR/dummy
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MIRRDIR=$TMPDIR/mirror
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MOUNTINFO=$TMPDIR/mnt
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# Use the included busybox for maximum compatibility and reliable results
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# e.g. we rely on the option "-c" for cp (reserve contexts), and -exec for find
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TOOLPATH=/data/busybox
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BINPATH=/data/magisk
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export OLDPATH=$PATH
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export PATH=$TOOLPATH:$OLDPATH
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# Default permissions
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umask 022
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log_print() {
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echo "$1"
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echo "$1" >> $LOGFILE
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log -p i -t Magisk "$1"
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}
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mktouch() {
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mkdir -p ${1%/*} 2>/dev/null
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if [ -z "$2" ]; then
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touch "$1" 2>/dev/null
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else
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echo "$2" > "$1" 2>/dev/null
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fi
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}
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unblock() {
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touch /dev/.magisk.unblock
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exit
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}
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run_scripts() {
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BASE=$MOUNTPOINT
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for MOD in $BASE/* ; do
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if [ ! -f $MOD/disable ]; then
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if [ -f $MOD/$1.sh ]; then
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chmod 755 $MOD/$1.sh
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chcon "u:object_r:system_file:s0" "$MOD/$1.sh"
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log_print "$1: $MOD/$1.sh"
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sh $MOD/$1.sh
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fi
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fi
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done
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}
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loopsetup() {
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LOOPDEVICE=
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for DEV in `ls /dev/block/loop*`; do
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if losetup $DEV $1; then
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LOOPDEVICE=$DEV
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break
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fi
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done
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}
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target_size_check() {
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e2fsck -p -f $1
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curBlocks=`e2fsck -n $1 2>/dev/null | cut -d, -f3 | cut -d\ -f2`;
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curUsedM=$((`echo "$curBlocks" | cut -d/ -f1` * 4 / 1024));
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curSizeM=$((`echo "$curBlocks" | cut -d/ -f2` * 4 / 1024));
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curFreeM=$((curSizeM - curUsedM));
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}
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travel() {
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cd $TRAVEL_ROOT/$1
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if [ -f .replace ]; then
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rm -rf $MOUNTINFO/$1
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mktouch $MOUNTINFO/$1 $TRAVEL_ROOT
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else
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for ITEM in * ; do
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if [ ! -e /$1/$ITEM ]; then
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# New item found
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# If we are in a higher level, delete the lower levels
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rm -rf $MOUNTINFO/dummy/$1
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# Mount the dummy parent
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mktouch $MOUNTINFO/dummy/$1
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if [ -d $ITEM ]; then
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# Create new dummy directory and mount it
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mkdir -p $DUMMDIR/$1/$ITEM
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mktouch $MOUNTINFO/$1/$ITEM $TRAVEL_ROOT
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elif [ -L $ITEM ]; then
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# Symlinks are small, copy them
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mkdir -p $DUMMDIR/$1 2>/dev/null
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cp -afc $ITEM $DUMMDIR/$1/$ITEM
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else
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# Create new dummy file and mount it
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mktouch $DUMMDIR/$1/$ITEM
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mktouch $MOUNTINFO/$1/$ITEM $TRAVEL_ROOT
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fi
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else
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if [ -d $ITEM ]; then
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# It's an directory, travel deeper
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(travel $1/$ITEM)
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elif [ ! -L $ITEM ]; then
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# Mount this file
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mktouch $MOUNTINFO/$1/$ITEM $TRAVEL_ROOT
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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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clone_dummy() {
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for ITEM in $MIRRDIR$1/* ; do
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REAL=${ITEM#$MIRRDIR}
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if [ ! -e $MOUNTINFO$REAL ]; then
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if [ -L $ITEM ]; then
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# Copy original symlink
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cp -afc $ITEM $DUMMDIR$REAL
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else
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if [ -d $ITEM ]; then
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mkdir -p $DUMMDIR$REAL
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else
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mktouch $DUMMDIR$REAL
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fi
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# Mount the mirror
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mktouch $MOUNTINFO/mirror$REAL
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fi
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elif [ -d $MOUNTINFO$REAL ]; then
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# Need to clone deeper
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mkdir -p $DUMMDIR$REAL
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(clone_dummy $REAL)
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fi
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done
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}
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bind_mount() {
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if [ -e $1 -a -e $2 ]; then
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mount -o bind $1 $2
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if [ $? -eq 0 ]; then
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log_print "Mount: $1"
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else
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log_print "Mount Fail: $1"
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fi
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fi
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}
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merge_image() {
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if [ -f $1 ]; then
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log_print "$1 found"
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if [ -f $IMG ]; then
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log_print "$IMG found, attempt to merge"
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# Handle large images
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target_size_check $1
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MERGEUSED=$curUsedM
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target_size_check $IMG
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if [ "$MERGEUSED" -gt "$curFreeM" ]; then
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NEWDATASIZE=$((((MERGEUSED + curUsedM) / 32 + 2) * 32))
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log_print "Expanding $IMG to ${NEWDATASIZE}M..."
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resize2fs $IMG ${NEWDATASIZE}M
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fi
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# Start merging
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mkdir /cache/data_img
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mkdir /cache/merge_img
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# setup loop devices
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loopsetup $IMG
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LOOPDATA=$LOOPDEVICE
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log_print "$LOOPDATA $IMG"
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loopsetup $1
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LOOPMERGE=$LOOPDEVICE
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log_print "$LOOPMERGE $1"
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if [ ! -z $LOOPDATA -a ! -z $LOOPMERGE ]; then
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# if loop devices have been setup, mount images
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OK=false
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mount -t ext4 -o rw,noatime $LOOPDATA /cache/data_img && \
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mount -t ext4 -o rw,noatime $LOOPMERGE /cache/merge_img && \
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OK=true
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if $OK; then
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# Merge (will reserve selinux contexts)
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cd /cache/merge_img
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for MOD in *; do
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if [ "$MOD" != "lost+found" ]; then
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log_print "Merging: $MOD"
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rm -rf /cache/data_img/$MOD
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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
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umount /cache/data_img
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umount /cache/merge_img
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fi
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losetup -d $LOOPDATA
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losetup -d $LOOPMERGE
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rmdir /cache/data_img
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rmdir /cache/merge_img
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else
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log_print "Moving $1 to $IMG "
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mv $1 $IMG
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fi
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rm -f $1
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fi
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}
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case $1 in
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post-fs )
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mv $LOGFILE /cache/last_magisk.log
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touch $LOGFILE
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chmod 644 $LOGFILE
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# No more cache mods!
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# Only for multirom!
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log_print "** Magisk post-fs mode running..."
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# Cleanup legacy 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
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log_print "* Mounting cache files"
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find /cache/magisk_mount -type f 2>/dev/null | while read ITEM ; do
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chmod 644 $ITEM
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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
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done
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fi
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unblock
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;;
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post-fs-data )
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# /data not mounted yet
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! mount | grep " /data " && unblock
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mount | grep " /data " | grep "tmpfs" && unblock
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# 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
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if [ -d "/cache/data_bin" ]; then
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rm -rf $BINPATH $TOOLPATH
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mkdir -p $TOOLPATH
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mv /cache/data_bin $BINPATH
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chmod -R 755 $BINPATH $TOOLPATH
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$BINPATH/busybox --install -s $TOOLPATH
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ln -s $BINPATH/busybox $TOOLPATH/busybox
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# Prevent issues
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rm -f $TOOLPATH/su $TOOLPATH/sh
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fi
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mv /cache/stock_boot.img /data 2>/dev/null
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find $BINPATH -exec chcon -h "u:object_r:system_file:s0" {} \;
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find $TOOLPATH -exec chcon -h "u:object_r:system_file:s0" {} \;
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chmod -R 755 $BINPATH $TOOLPATH
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# Live patch sepolicy
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$BINPATH/sepolicy-inject --live -s su
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# Multirom functions should go here, not available right now
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MULTIROM=false
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# Image merging
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chmod 644 $IMG /cache/magisk.img /data/magisk_merge.img 2>/dev/null
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merge_image /cache/magisk.img
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merge_image /data/magisk_merge.img
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# Mount magisk.img
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[ ! -d $MOUNTPOINT ] && mkdir -p $MOUNTPOINT
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if ! mount | grep $MOUNTPOINT; then
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loopsetup $IMG
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[ ! -z $LOOPDEVICE ] && mount -t ext4 -o rw,noatime $LOOPDEVICE $MOUNTPOINT
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if [ $? -ne 0 ]; then
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log_print "magisk.img mount failed, nothing to do :("
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unblock
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fi
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fi
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# Remove empty directories, legacy paths, symlinks, old temporary images
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find $MOUNTPOINT -type d -depth ! -path "*core*" -exec rmdir {} \; 2>/dev/null
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rm -rf $COREDIR/bin $COREDIR/dummy $COREDIR/mirror /data/magisk/*.img
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# Remove modules that is labeled to be removed
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for MOD in $MOUNTPOINT/* ; do
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if [ -f $MOD/remove ] || [ $MOD = zzsupersu ]; then
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log_print "Remove module: $MOD"
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rm -rf $MOD
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fi
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done
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# Unmount, shrink, remount
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if umount $MOUNTPOINT; then
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losetup -d $LOOPDEVICE
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target_size_check $IMG
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NEWDATASIZE=$(((curUsedM / 32 + 2) * 32))
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if [ "$curSizeM" -gt "$NEWDATASIZE" ]; then
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log_print "Shrinking $IMG to ${NEWDATASIZE}M..."
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resize2fs $IMG ${NEWDATASIZE}M
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fi
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loopsetup $IMG
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[ ! -z $LOOPDEVICE ] && mount -t ext4 -o rw,noatime $LOOPDEVICE $MOUNTPOINT
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if [ $? -ne 0 ]; then
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log_print "magisk.img mount failed, nothing to do :("
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unblock
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fi
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fi
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log_print "* Preparing modules"
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mkdir -p $DUMMDIR
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mkdir -p $MIRRDIR/system
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# Travel through all mods
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for MOD in $MOUNTPOINT/* ; do
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if [ -f $MOD/auto_mount -a -d $MOD/system -a ! -f $MOD/disable ]; then
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TRAVEL_ROOT=$MOD
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(travel system)
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fi
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done
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# Proper permissions for generated items
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find $TMPDIR -exec chcon -h "u:object_r:system_file:s0" {} \;
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# linker(64), t*box required for bin
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if [ -f $MOUNTINFO/dummy/system/bin ]; then
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cp -afc /system/bin/linker* /system/bin/t*box $DUMMDIR/system/bin/
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fi
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DISABLEHIDE=false
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for i in /system /system/lib /system/lib64 /system/vendor /system/vendor/lib /system/vendor/lib64; do
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[ -f $MOUNTINFO/dummy$1 ] && DISABLEHIDE=true && break
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done
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# Crash prevention!!
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$DISABLEHIDE && rm -f $COREDIR/magiskhide/enable 2>/dev/null
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# Remove crap folder
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rm -rf $MOUNTPOINT/lost+found
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# Start doing tasks
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# Stage 1
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log_print "* Stage 1: Mount system and vendor mirrors"
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SYSTEMBLOCK=`mount | grep " /system " | awk '{print $1}'`
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mkdir -p $MIRRDIR/system
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mount -o ro $SYSTEMBLOCK $MIRRDIR/system
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if [ `mount | grep -c " /vendor "` -ne 0 ]; then
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VENDORBLOCK=`mount | grep " /vendor " | awk '{print $1}'`
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mkdir -p $MIRRDIR/vendor
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mount -o ro $VENDORBLOCK $MIRRDIR/vendor
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else
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ln -s $MIRRDIR/system/vendor $MIRRDIR/vendor
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fi
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# Since mirrors always exist, we load libraries from mirrors
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LD_LIBRARY_PATH=$MIRRDIR/system/lib:$MIRRDIR/vendor/lib
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[ -d /system/lib64 ] LD_LIBRARY_PATH=$MIRRDIR/system/lib64:$MIRRDIR/vendor/lib64
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# Stage 2
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log_print "* Stage 2: Mount dummy skeletons"
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# Move dummy /system/vendor to /vendor for consistency
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mv -f $MOUNTINFO/dummy/system/vendor $MOUNTINFO/dummy/vendor 2>/dev/null
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mv -f $DUMMDIR/system/vendor $DUMMDIR/vendor 2>/dev/null
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find $MOUNTINFO/dummy -type f 2>/dev/null | while read ITEM ; do
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TARGET=${ITEM#$MOUNTINFO/dummy}
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ORIG=$DUMMDIR$TARGET
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(clone_dummy $TARGET)
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bind_mount $ORIG $TARGET
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done
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# Stage 3
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log_print "* Stage 3: Mount module items"
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find $MOUNTINFO/system -type f 2>/dev/null | while read ITEM ; do
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TARGET=${ITEM#$MOUNTINFO}
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ORIG=`cat $ITEM`$TARGET
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bind_mount $ORIG $TARGET
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done
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# Stage 4
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log_print "* Stage 4: Execute module scripts"
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run_scripts post-fs-data
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# Stage 5
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log_print "* Stage 5: Mount mirrored items back to dummy"
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find $MOUNTINFO/mirror -type f 2>/dev/null | while read ITEM ; do
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TARGET=${ITEM#$MOUNTINFO/mirror}
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ORIG=$MIRRDIR$TARGET
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bind_mount $ORIG $TARGET
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done
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# Bind hosts for Adblock apps
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if [ -f $COREDIR/hosts ]; then
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log_print "* Enabling systemless hosts file support"
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bind_mount $COREDIR/hosts /system/etc/hosts
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fi
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# Expose busybox
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if [ -f $COREDIR/busybox/enable ]; then
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log_print "* Enabling BusyBox"
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cp -afc /data/busybox/. $COREDIR/busybox
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cp -afc /system/xbin/. $COREDIR/busybox
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chmod -R 755 $COREDIR/busybox
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chcon -hR "u:object_r:system_file:s0" $COREDIR/busybox
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bind_mount $COREDIR/busybox /system/xbin
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fi
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# Restart post-fs-data if necessary (multirom)
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$MULTIROM && setprop magisk.restart_pfsd 1
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fi
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unblock
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;;
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service )
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# Version info
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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 $COREDIR/magiskhide/enable ]; then
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log_print "* Removing tampered read-only system props"
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VERIFYBOOT=`getprop ro.boot.verifiedbootstate`
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FLASHLOCKED=`getprop ro.boot.flash.locked`
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VERITYMODE=`getprop ro.boot.veritymode`
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[ ! -z "$VERIFYBOOT" -a "$VERIFYBOOT" != "green" ] && \
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log_print "`$BINPATH/resetprop -v -n ro.boot.verifiedbootstate green`"
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[ ! -z "$FLASHLOCKED" -a "$FLASHLOCKED" != "1" ] && \
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log_print "`$BINPATH/resetprop -v -n ro.boot.flash.locked 1`"
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[ ! -z "$VERITYMODE" -a "$VERITYMODE" != "enforcing" ] && \
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log_print "`$BINPATH/resetprop -v -n ro.boot.veritymode enforcing`"
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mktouch $COREDIR/magiskhide/hidelist
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chmod -R 755 $COREDIR/magiskhide
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# Add Safety Net preset
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$COREDIR/magiskhide/add com.google.android.gms.unstable
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log_print "* Starting Magisk Hide"
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/data/magisk/magiskhide
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fi
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;;
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esac
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