I started out writing a simple bash shell script to find duplicate files within a given directory using SHA1 to detect matches. Everything worked until I encountered file names with spaces. The detection still works, but in the output the spaces are converted to linefeeds.
The script...
#!/bin/bash
export TARGET=$1
find $TARGET -type f -exec openssl sha1 \{\} \; > ./dupes.txt
COUNT=-1
for EVALUATION in `cat ./dupes.txt | sed 's/SHA1(\(.*\))\= \(.*\)$/\2 \1/' | awk '{print $1}' | sort | uniq -c | sort -nr`
do
if [[ $COUNT == -1 ]]
then
COUNT=$EVALUATION
else
HASH=$EVALUATION
if [[ $COUNT == 1 ]]
then
break
fi
echo "--- duplicate set ---"
for FILE in `grep $HASH ./dupes.txt | awk -F"[()]+" '{print $2}'`
do
echo "$FILE"
done
echo "---------------------"
COUNT=-1
fi
done
Run the script like...
./dupes.sh /home/dacracot/testDupes
It will create a file dupes.txt that looks something like...
SHA1(/home/dacracot/testDupes/lP3wj.jpg)= 324d91f412745481ed38aa184e5a56bfc3bf43b5
SHA1(/home/dacracot/testDupes/1673.gif)= 9c4029ec2e310f202b413d685209373d234e5465
SHA1(/home/dacracot/testDupes/.DS_Store)= b0ae6631a1412863f958da64091f4050005bf8d6
SHA1(/home/dacracot/testDupes/tae 2.svg)= 3ddc4fd6ae505bd01f370d0a018ef1f84b4d8011
SHA1(/home/dacracot/testDupes/tae.graffle)= 77f1ad6d695d944abacfe3a7f196be77125b6ef6
SHA1(/home/dacracot/testDupes/tae.svg)= 3ddc4fd6ae505bd01f370d0a018ef1f84b4d8011
SHA1(/home/dacracot/testDupes/22402_graph.jpg)= 24e5a25c8abf322d424dd5ce2e5b77381cd001c4
SHA1(/home/dacracot/testDupes/forwardcont.jpg)= 981e75060ae8e3aad2fe741b944d97219c8ccbe5
SHA1(/home/dacracot/testDupes/tae.svg.gz)= 922af5a5adbf7a4e7fd234aac7bcee2986133c4d
SHA1(/home/dacracot/testDupes/Alt2012.pdf)= 97d1fd997df9eb310b30a371c53883f5227cf10a
SHA1(/home/dacracot/testDupes/vcBZ8.jpg)= 7553c19fcb6aa159aada2e38066b5ba84465ee57
SHA1(/home/dacracot/testDupes/derm.graffle)= 0e1c4032f5f1fadc3a1643b2b77f816011c2d67f
SHA1(/home/dacracot/testDupes/WA.png)= 0e2e77624c3a76da4816f116665a041f6bdced2d
SHA1(/home/dacracot/testDupes/DRAW.GIF)= 6a8e4a2bf413e84140a0edeb40b475a5d3e4c255
SHA1(/home/dacracot/testDupes/crazyTalk.gif)= 1d938bbcb8cf09f30492df4504a50348cef7ea9d
And finally output that looks like...
--- duplicate set ---
/home/dacracot/testDupes/tae
2.svg
/home/dacracot/testDupes/tae.svg
---------------------
But as you can see from the first file, the output should be...
--- duplicate set ---
/home/dacracot/testDupes/tae 2.svg
/home/dacracot/testDupes/tae.svg
---------------------
What is changing the space to a linefeed?