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find the file by sector in filesystem
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#!/bin/bash | |
# sector_list sample as below: | |
# 0 | |
# 512 | |
# 4087578 | |
# 4087579 | |
# 6324224 | |
# | |
# You should build a sector_list firstly, and then execute this script to catch the files | |
# At the end of the task, it will tell you where the result is written to... | |
if [ $# -lt 2 ];then | |
echo "usage:$0 dev sector_list" | |
exit 1 | |
fi | |
dev="$1" | |
sectorlist="$2" | |
outputfile="`date +%Y%m%d%H%M%S`.result" | |
# check the device | |
if [ ! -b "$dev" ]; then | |
echo "invalid device" | |
exit 1 | |
fi | |
# check the file | |
if [ ! -f "$sectorlist" ];then | |
echo "$sectorlist is not existed" | |
exit 1 | |
fi | |
# got the size of block | |
blksize=`debugfs -R 'stats' $dev | grep "Block size:" | awk '{print $3}'` | |
echo "blksize: $blksize" | |
sector_per_blk=`echo "$blksize / 512" | bc` | |
echo "sectors per block:$sector_per_blk" | |
tmp="$$.tmplog" | |
echo > $tmp | |
# scan the sectors in the list | |
while read line | |
do | |
sector=$(echo $line | awk '{print $1}') | |
# calc block | |
blk=`echo "$sector / $sector_per_blk" | bc` | |
#echo "$sector => $blk" | |
# find inode by block | |
inode=`debugfs -R "icheck $blk" $dev | grep -v debugfs | grep -v Inode | grep -v "not found" | awk '{print $2}'` | |
if [ "$inode" == "" ];then | |
#echo "blk $blk miss inode" | |
continue | |
fi | |
# find the file by inode | |
file=`debugfs -R "ncheck $inode" $dev | grep -v debugfs | grep -v Inode | awk '{print $2}'` | |
echo $file >> $tmp | |
done < "$sectorlist" | |
echo "result write into $outputfile" | |
cat $tmp | sort -u > $outputfile | |
rm -f $tmp |
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