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The Something Awful Forums > Discussion > Serious Hardware/Software Crap > Haus of Tech Support > Accidentally concatenated multiple zip files to one. Is there a way back?
 
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Mark Larson
Dec 27, 2003

Interesting...
I had multiple small zip files scattered across several folders, and I used this command to find them all and put them into one folder:

code:
find . -name "sa_forums_dataset*" -exec mv -v {} ./sa_forums_dataset \;
However, you might have noticed that I didn't have a trailing backslash after the folder name, and a file or folder with that name didn't already exist. Therefore Linux* created a new file instead of a new folder, and concatenated all the smaller files into it just gave me one 16MB file, which is smaller than it should be.

How do I get my files back now?

* By Linux I mean Windows 10 WSL (Debian) however the files are on the Windows file system

* # ? Feb 23, 2019 19:34
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# ? Apr 20, 2024 01:04
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Hed
Mar 31, 2004

Fun Shoe
It looks like you just clobbered them. If you in fact concatenated you should be able to take advantage of the fact that every PKZIP file starts with a known header.

For example some python I completely haven't tested that could do this is to split on that magic and write the individual files out:
Python code:
INPUT_FILE = 'sa_forums_dataset'
PKZIP_HEADER = b'\x50\x4b\x03\x04'
with open(INPUT_FILE, 'rb') as f:
    data = f.read()

subfiles = data.split(PKZIP_HEADER)

for i, subfile in enumerate(subfiles):
    with open('zip-%d.zip' % i, 'wb') as f:
        f.write(PKZIP_HEADER)
        f.write(subfile)

Hed fucked around with this message at 02:05 on Feb 24, 2019

* # ? Feb 23, 2019 21:41
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Mark Larson
Dec 27, 2003

Interesting...
The files are all gone. Luckily I was able to restore from an online backup.

* # ? Feb 24, 2019 19:18
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The Something Awful Forums > Discussion > Serious Hardware/Software Crap > Haus of Tech Support > Accidentally concatenated multiple zip files to one. Is there a way back?