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#!/bin/bash
#
# To call this script, make sure mke2fs is somewhere in PATH
function usage() {
cat<<EOT
Usage:
mkuserimg.sh [-s] SRC_DIR OUTPUT_FILE EXT_VARIANT MOUNT_POINT SIZE [-j <journal_size>]
[-T TIMESTAMP] [-C FS_CONFIG] [-D PRODUCT_OUT] [-B BLOCK_LIST_FILE]
[-d BASE_ALLOC_FILE_IN ] [-A BASE_ALLOC_FILE_OUT ] [-L LABEL]
[-i INODES ] [-e ERASE_BLOCK_SIZE] [-o FLASH_BLOCK_SIZE]
[-U MKE2FS_UUID] [-S MKE2FS_HASH_SEED] [FILE_CONTEXTS]
EOT
}
BLOCKSIZE=4096
MKE2FS_OPTS=""
MKE2FS_EXTENDED_OPTS=""
E2FSDROID_OPTS=""
E2FSPROGS_FAKE_TIME=""
if [ "$1" = "-s" ]; then
MKE2FS_EXTENDED_OPTS+="android_sparse"
shift
else
E2FSDROID_OPTS+="-e"
fi
if [ $# -lt 5 ]; then
usage
exit 1
fi
SRC_DIR=$1
if [ ! -d $SRC_DIR ]; then
echo "Can not find directory $SRC_DIR!"
exit 2
fi
OUTPUT_FILE=$2
EXT_VARIANT=$3
MOUNT_POINT=$4
SIZE=$5
shift; shift; shift; shift; shift
if [ "$1" = "-j" ]; then
if [ "$2" = "0" ]; then
MKE2FS_OPTS+="-O ^has_journal"
else
MKE2FS_OPTS+="-J size=$2"
fi
shift; shift
fi
if [[ "$1" == "-T" ]]; then
E2FSDROID_OPTS+=" -T $2"
E2FSPROGS_FAKE_TIME=$2
shift; shift
fi
if [[ "$1" == "-C" ]]; then
E2FSDROID_OPTS+=" -C $2"
shift; shift
fi
if [[ "$1" == "-D" ]]; then
E2FSDROID_OPTS+=" -p $2"
shift; shift
fi
if [[ "$1" == "-B" ]]; then
E2FSDROID_OPTS+=" -B $2"
shift; shift
fi
if [[ "$1" == "-d" ]]; then
E2FSDROID_OPTS+=" -d $2"
shift; shift
fi
if [[ "$1" == "-A" ]]; then
E2FSDROID_OPTS+=" -D $2"
shift; shift
fi
if [[ "$1" == "-L" ]]; then
MKE2FS_OPTS+=" -L $2"
shift; shift
fi
if [[ "$1" == "-i" ]]; then
MKE2FS_OPTS+=" -N $2"
shift; shift
fi
if [[ "$1" == "-e" ]]; then
if [[ $MKE2FS_EXTENDED_OPTS ]]; then
MKE2FS_EXTENDED_OPTS+=","
fi
MKE2FS_EXTENDED_OPTS+="stripe_width=$(($2/BLOCKSIZE))"
shift; shift
fi
if [[ "$1" == "-o" ]]; then
if [[ $MKE2FS_EXTENDED_OPTS ]]; then
MKE2FS_EXTENDED_OPTS+=","
fi
# stride should be the max of 8kb and the logical block size
MKE2FS_EXTENDED_OPTS+="stride=$((($2 > 8192 ? $2 : 8192) / BLOCKSIZE))"
shift; shift
fi
if [[ "$1" == "-U" ]]; then
MKE2FS_OPTS+=" -U $2"
shift; shift
fi
if [[ "$1" == "-S" ]]; then
if [[ $MKE2FS_EXTENDED_OPTS ]]; then
MKE2FS_EXTENDED_OPTS+=","
fi
MKE2FS_EXTENDED_OPTS+="hash_seed=$2"
shift; shift
fi
if [[ $MKE2FS_EXTENDED_OPTS ]]; then
MKE2FS_OPTS+=" -E $MKE2FS_EXTENDED_OPTS"
fi
if [[ $1 ]]; then
E2FSDROID_OPTS+=" -S $1"
fi
case $EXT_VARIANT in
ext4) ;;
*) echo "Only ext4 is supported!"; exit 3 ;;
esac
if [ -z $MOUNT_POINT ]; then
echo "Mount point is required"
exit 2
fi
if [[ ${MOUNT_POINT:0:1} != "/" ]]; then
MOUNT_POINT="/"$MOUNT_POINT
fi
if [ -z $SIZE ]; then
echo "Need size of filesystem"
exit 2
fi
# Round down the filesystem length to be a multiple of the block size
SIZE=$((SIZE / BLOCKSIZE))
# truncate output file since mke2fs will keep verity section in existing file
cat /dev/null >$OUTPUT_FILE
MAKE_EXT4FS_ENV="MKE2FS_CONFIG=./system/extras/ext4_utils/mke2fs.conf"
if [[ $E2FSPROGS_FAKE_TIME ]]; then
MAKE_EXT4FS_ENV+=" E2FSPROGS_FAKE_TIME=$E2FSPROGS_FAKE_TIME"
fi
MAKE_EXT4FS_CMD="mke2fs $MKE2FS_OPTS -t $EXT_VARIANT -b $BLOCKSIZE $OUTPUT_FILE $SIZE"
echo $MAKE_EXT4FS_ENV $MAKE_EXT4FS_CMD
env $MAKE_EXT4FS_ENV $MAKE_EXT4FS_CMD
if [ $? -ne 0 ]; then
exit 4
fi
if [[ $E2FSPROGS_FAKE_TIME ]]; then
E2FSDROID_ENV="E2FSPROGS_FAKE_TIME=$E2FSPROGS_FAKE_TIME"
fi
E2FSDROID_CMD="e2fsdroid $E2FSDROID_OPTS -f $SRC_DIR -a $MOUNT_POINT $OUTPUT_FILE"
echo $E2FSDROID_ENV $E2FSDROID_CMD
env $E2FSDROID_ENV $E2FSDROID_CMD
if [ $? -ne 0 ]; then
rm -f $OUTPUT_FILE
exit 4
fi
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