🚀 go-pugleaf

luckey@rtfm.mlb.fl.us (Jon Luckey) writes:

>Recall seeing all those questions like

>  "Why can't I unzip PGP 2.1, I keep gettin CRC failures"

>and the usual answer is 'Did you remember to set BIN mode
>before getting it with FTP'

>Well, I bet alot of people did.  I know I did.  But when I
>tried PKUNZIP, I got CRC errors on about 30% of the files.

>But I did find a way to unzip this very same file.  How?
>By using the unzip program on my unix machine (INFO zip?)

>and PGP wasn't the only offender.  I just got ZZAP off of
>garbo, and I'm having the same sort of problems.  It unzips
>fine on unix,  crc errors on the 386.

>I wonder if Timo and other moderators aren't unzipping and
>rezipping with unix style zip, to try and achive PKZIP 1.1
>compatability.  But instead it seems that it becomes less
>compatable rather than more.

>Has anyone found a better solution than unzipping under
>unix?

Well, I'm not sure about a solution at the unzipping stage,
but I do know that the  Zip  utility (version 1.0, dated
29 September 1991) has a -k option which tells it to
simulate PKZIP-created .zip files.  In addition, I 
tried the following:

(1) Take .ZIP file (created with PKZIP 1.1), and unzip it
    under UNIX with  unzip, 

(2) re-zip it under UNIX with  zip, (either with or without
                                     -k option),

(3) and then unzip it again, this time with PKUNZIP (running
    in a SoftPC  PC-emulator window).

No problems were encountered, either with or without the -k
option.  So whether omission of the -k option is to blame is
an undecided question (at least to me).  You might try
unzipping with  unzip  and then rezipping with  zip  using
the -k option and see if that helps any, before downloading
the final zipped file for decompression with PKUNZIP.

Just my thoughts on the situation.


David Douglas
douglas@usceast.cs.scarolina.edu