Re: Need info on archive file formats

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1 total messages Started by Nick FitzGerald, CSC, Uni. of Ca... Thu, 23 Jul 1992 00:23

#93

Author: Nick FitzGerald, CSC, Uni. of Ca...
Date: Thu, 23 Jul 1992 00:23

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Someone asked about zip, arj, lzh, etc archive file formats (I can't do
a "fancy" reply coz he cross-posted to comp.sys.msdos.programmer - a
non-group, officially deleted/discontinued/whatever yonks ago - and my
news reader won't allow me to followup posts with invalid groups in the
"Newsgroups:" header line).

For .zip, snarf the Info-Zip Group's unzip source (available at any good
DOS ftp site).  It handles .zips, be they "straight" or self-x'ing.  I
think it has something to do with the "central directory" structure,
which either resides at the very end of any zip file or which is pointed
to by a pointer at the .zips end.

Good luck with the others.    8-)

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 Nick FitzGerald, PC Applications Consultant, CSC, Uni of Canterbury, N.Z.
 n.fitzgerald@csc.canterbury.ac.nz    (64)(3)  642-337 Voice,  642-332 FAX

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