You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
95 lines
2.7 KiB
95 lines
2.7 KiB
#!/system/bin/sh |
|
|
|
# |
|
# Copyright (C) 2017 The Android Open Source Project |
|
# |
|
# Licensed under the Apache License, Version 2.0 (the "License"); |
|
# you may not use this file except in compliance with the License. |
|
# You may obtain a copy of the License at |
|
# |
|
# http://www.apache.org/licenses/LICENSE-2.0 |
|
# |
|
# Unless required by applicable law or agreed to in writing, software |
|
# distributed under the License is distributed on an "AS IS" BASIS, |
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
|
# See the License for the specific language governing permissions and |
|
# limitations under the License. |
|
# |
|
|
|
# This script will extract ASAN libraries from /system/asan.tar.gz to /data and then reboot. |
|
|
|
# TODO: |
|
# * Timestamp or something to know when to run this again. Right now take the existence of |
|
# /data/lib as we're already done. |
|
# * Need to distinguish pre- from post-decryption for FDE. |
|
|
|
SRC=/system/asan.tar.bz2 |
|
MD5_FILE=/data/asan.md5sum |
|
ASAN_DIR=/data/asan |
|
# Minimum /data size in blocks. Arbitrarily 512M. |
|
MIN_DATA_SIZE=131072 |
|
|
|
# Checks for FDE pre-decrypt state. |
|
|
|
VOLD_STATUS=$(getprop vold.decrypt) |
|
if [ "$VOLD_STATUS" = "trigger_restart_min_framework" ] ; then |
|
log -p i -t asan_install "Pre-decrypt FDE detected (by vold property)!" |
|
exit 1 |
|
fi |
|
|
|
STATFS_BLOCKS=$(stat -f -c '%b' /data) |
|
if [ "$STATFS_BLOCKS" -le "$MIN_DATA_SIZE" ] ; then |
|
log -p i -t asan_install "Pre-decrypt FDE detected (by /data size)!" |
|
exit 1 |
|
fi |
|
|
|
# Check for ASAN source. |
|
|
|
if ! test -f $SRC ; then |
|
log -p i -t asan_install "Did not find $SRC!" |
|
exit 1 |
|
fi |
|
|
|
log -p i -t asan_install "Found $SRC, checking whether we need to apply it." |
|
|
|
# Checksum check. |
|
|
|
ASAN_TAR_MD5=$(md5sum $SRC) |
|
if test -f $MD5_FILE ; then |
|
INSTALLED_MD5=$(cat $MD5_FILE) |
|
if [ "x$ASAN_TAR_MD5" = "x$INSTALLED_MD5" ] ; then |
|
log -p i -t asan_install "Checksums match, nothing to be done here." |
|
exit 0 |
|
fi |
|
fi |
|
|
|
# Actually apply the source. |
|
|
|
# Just clean up, helps with restorecon. |
|
rm -rf $ASAN_DIR |
|
|
|
log -p i -t asan_install "Untarring $SRC..." |
|
|
|
# Unzip from /system/asan.tar.gz into data. Need to pipe as gunzip is not on device. |
|
bzip2 -c -d $SRC | tar -x -f - --no-same-owner -C / || exit 1 |
|
|
|
# Cannot log here, log would run with system_data_file. |
|
|
|
# Set correct permission bits. |
|
chmod -R 744 $ASAN_DIR |
|
cd $ASAN_DIR ; find . -type d -exec chmod 755 {} \; |
|
|
|
restorecon -R -F $ASAN_DIR/*/lib* |
|
|
|
log -p i -t asan_install "Fixed selinux labels..." |
|
|
|
|
|
# Now write down our checksum to mark the extraction complete. |
|
echo "$ASAN_TAR_MD5" > $MD5_FILE |
|
|
|
# We want to reboot now. It seems it is not possible to run "reboot" here, the device will |
|
# just be stuck. |
|
|
|
log -p i -t asan_install "Signaling init to reboot..." |
|
|
|
setprop sys.powerctl reboot
|
|
|