Make Android-like ext4 File System for gammaray testing

make_ext4_example_android_fs.sh

#!/usr/bin/bash

truncate -s 0 ext4-match-android.raw
truncate -s 14540582912 ext4-match-android.raw

echo ''
echo 'Create a Single Primary Partition w/ Defaults'
read

sfdisk ext4-match-android.raw << EOF 
# partition table of ext4-match-android.raw
unit: sectors

ext4-match-android.raw1 : start=     2048, size= 28397528, Id=83
ext4-match-android.raw2 : start=        0, size=        0, Id= 0
ext4-match-android.raw3 : start=        0, size=        0, Id= 0
ext4-match-android.raw4 : start=        0, size=        0, Id= 0
EOF

sudo kpartx -av ext4-match-android.raw

sudo mkfs.ext4 \
	-m 0 \
	-M '/data' \
	-O none,has_journal,ext_attr,resize_inode,filetype,sparse_super,large_file,uninit_bg,extent \
	-U '57f8f4bc-abf4-655f-bf67-946fc0f9f25b' \
	/dev/mapper/loop0p1

sudo tune2fs \
	-E hash_alg=tea \
	-e remount-ro \
	-o \^user_xattr,\^acl \
	-C 108 \
	/dev/mapper/loop0p1

sudo mkdir -p /data
sudo mount /dev/mapper/loop0p1 /data

# create some number of files to more closely match Android case
for i in {1..36164}
do
	sudo touch /data/$i
done

# try to closely match used blocks
sudo dd if=/dev/zero of=/data/1 bs=4096 count=396647

#sudo umount /data

echo ''
echo 'Finished Creating Fake Android File System in: ext4-match-android.raw'
echo 'Press ENTER for Sanity Check'
read

sudo tune2fs -l /dev/mapper/loop0p1

echo ''
echo 'Press ENTER to run gammaray'
read

/home/bamos/repos/gammaray-gpt/bin/gray-crawler ext4-match-android.raw ext4-match-android.bson

echo ''
echo 'Press ENTER to examine gammaray BSON'
read

/home/bamos/repos/gammaray-gpt/bin/tools/bson-printer ext4-match-android.bson | less -R

sudo umount /data
sudo kpartx -dv ext4-match-android.raw