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#!/system/bin/sh
#
# Setup /data/data based on whether the phone is encrypted or not
# and migrate the data to the correct location on en/decryption
# Encrypted => leave on /data/data (/datadata cannot be encrypted)
# Unencrypted => symlink to /datadata for performance
PATH=/system/bin/:/system/xbin/
function migrate_datadata {
# Migrate data from /datadata to /data/data
if test -h /data/data ; then
rm /data/data
mkdir /data/data
chown system.system /data/data
chmod 0771 /data/data
cp -a /datadata/* /data/data/
touch /data/data/.nodatadata
rm -r /data/data/lost+found
busybox umount /datadata
erase_image datadata
busybox mount /datadata
fi
}
function migrate_cache {
if test -e /data/data/$1 ; then
if ! test -h /data/data/$1/cache ; then
OWNER="`ls -ld /data/data/$1/ | awk '{print $3}'`"
rm -r /data/data2/$1 # In case it exists
mkdir -p /data/data2/$1
chmod 751 /data/data2/$1
busybox mv -f /data/data/$1/cache /data/data2/$1/
ln -s /data/data2/$1/cache /data/data/$1/cache
chown $OWNER.$OWNER /data/data2/$1 /data/data2/$1/cache
busybox chown -h $OWNER.$OWNER /data/data/$1/cache
fi
else
# App was removed?
rm -r /data/data2/$1
fi
}
# There are 4 states which this script can be called from.
# They can be detected using vold.decrypt and ro.crypto.state props
CRYPTO_STATE="`getprop ro.crypto.state`"
VOLD_DECRYPT="`getprop vold.decrypt`"
if test "$CRYPTO_STATE" = "unencrypted" ; then
if test "$VOLD_DECRYPT" = "" ; then
# Normal unencrypted boot
if test -e /data/data/.nodatadata ; then
migrate_datadata
else
rmdir /data/data
ln -s /datadata /data/data
# Migrate download provider's cache out of /data/data because that's where market stores its downloads
migrate_cache com.android.providers.downloads
# GMail stores attachments in here
migrate_cache com.google.android.gm
fi
fi
# else: Encrypting, do nothing
else
if test "$VOLD_DECRYPT" = "trigger_post_fs_data" ; then
# Encrypted boot (after decryption)
migrate_datadata
fi
# else: Encrypted boot (before decryption), do nothing
fi
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