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- Newsgroups: comp.archives.msdos.d
- Path: sparky!uunet!gatech!hubcap!opusc!usceast!douglas
- From: douglas@cs.scarolina.edu (G. David Douglas Jr.)
- Subject: Re: Why is Zip not compatable is PKUNZIP
- Message-ID: <douglas.727918463@fig.cs.scarolina.edu>
- Sender: usenet@usceast.cs.scarolina.edu (USENET News System)
- Organization: USC Department of Computer Science
- References: <1993Jan15.055613.19343@rtfm.mlb.fl.us>
- Date: 24 Jan 93 23:34:23 GMT
- Lines: 55
-
- 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
-
-