Unzip zipfile from spanned zip

  • Thread starter Thread starter ICE
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ICE

Is there anyone who knows if it is possible (and how) to unzip a zip-file
from a spanned disk set, when the last disk is missing?
Or does anyone know the correct newsgroup to post this question?


Thanks
 
ICE said:
Is there anyone who knows if it is possible (and how) to
unzip a zip-file from a spanned disk set, when the last
disk is missing?
Click to expand...

The last disc will contain the offsets for the various blocks that
contain the files in the archive. Fortunately, though, each block has
its own header, so you could conceivably scan through the file parts
looking for 0x04034b50 -- the header signature.

Sadly, I do not know of an application that is designed to do this. If
you were to acquaint yourself with the format, and have a bit of
programming knowledge, you could join the file parts and reconstruct a
central directory. From there, it should open with your regular
unzipping program.
Or does anyone know the correct newsgroup to post this
question?
Click to expand...

It appears that alt.comp.software would have at least been a better pick
than alt.comp.hardware -- I don't know if that group is active, though.
 
ICE said:
Is there anyone who knows if it is possible (and how) to unzip a zip-file
from a spanned disk set, when the last disk is missing?
Or does anyone know the correct newsgroup to post this question?
Click to expand...

One more remark: PKZIPFIX is apparently used to fix broken zip files,
though it has never accomplished that for me. I suppose it is worth
trying though.

Another remark: You can unspan the set yourself, by copying the various
parts of the discs and "copying" them together. I don't remember how
pkzip named spanned file parts, so I'll just make that up for
illustrative purposes:

copy part1.zip+part2.zip+part3.zip whole-thing.zip
 
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