Re: [Freedos-user] Zip vs Pkzip
Hi again,
On Wed, Jun 3, 2015 at 4:56 AM, Don Flowers wrote:
>
> Thanks Mateusz, I will report this to Info-Zip
I don't know why you would contact them. It's probably not their bug.
In fact, I don't think it's a bug at all! Also, keep in mind that we
have no idea whether they still "maintain" (esp. for DOS) any of their
tools anymore. They haven't had a release since 2009!
You still didn't tell us which version you're using. There are both
16-bit and 32-bit DOS builds (unzip.exe and unzip32.exe). Try "unzip
-v" to show you which is which. Most people are using 5.52 or 6.00 by
now. I know I am.
> On Wed, Jun 3, 2015 at 5:55 AM, Don Flowers wrote:
>>
>> I am currently running kubuntu 14.04 , 14.10 and Zorin OS 9 (14.04) but
>> this started as early as 12.04. It is not the mirror per se - I can go back
>> to what I thought was a bad download and (pk)unzip it and it turns out to be
>> complete.
The Simtel mirror I've been using lately (lots, without any errors) is
"ftp.sunet.se/pub/simtelnet/msdos".
You can find Unzip 5.52 and 6.00 binaries for DOS ("x3") at various places:
1a). ftp://ftp.info-zip.org/pub/infozip/msdos/unz552x3.exe
1b). ftp://ftp.info-zip.org/pub/infozip/msdos/unz600x3.exe
2a).
http://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/util/file/info-zip/unzip/old/unz552x3.exe
2b).
http://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/util/file/info-zip/unzip/unz600x3.exe
3). ftp://ftp.sac.sk/pub/sac/pack/unz552x3.exe
Generally speaking, if you download a file, it may or may not have
been modified by whomever you're grabbing it from. Sometimes that
means an innocuous .ZIP comment, but otherwise it could also mean
something like an unpopular compression method (Shrink? Reduce? Bzip2?
LZMA?) or even accidental (official) errors or various other quirks
(filename case or extra fields or whatnot). So, while it's not 100%
foolproof, you should check the checksum (often crc32 or md5sum) of
the actual archive file itself. The internal CRC32 for a single file
is better than nothing but still very weak.
http://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/util/file/md5sum/md5sumx.zip
What I'm trying to say is that I want you to point me to a few of
these "corrupted" files. Specifically, what URL (not just mirror or
individual filename)? And then I want you to run "md5sum file.zip",
and tell me what it says. And don't forget to tell me what "unzip -v"
(under DOS) says as well.
--
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Re: [Freedos-user] Zip vs Pkzip
Thanks Mateusz, I will report this to Info-Zip On Wed, Jun 3, 2015 at 5:55 AM, Don Flowers wrote: > I am currently running kubuntu 14.04 , 14.10 and Zorin OS 9 (14.04) but > this started as early as 12.04. It is not the mirror per se - I can go back > to what I thought was a bad download and (pk)unzip it and it turns out to > be complete. > > On Wed, Jun 3, 2015 at 3:38 AM, Louis Santillan > wrote: > >> Also, Info-Zip has a zipinfo binary. The verbose output (-v) might >> tell you something. >> >> On Wed, Jun 3, 2015 at 12:29 AM, Mateusz Viste wrote: >> > This is something you might want to report to the Info-Zip team instead >> > of here. Don't forget to provide them with an example of a file that is >> > correctly decompressed by pkunzip, but not by unzip. >> > >> > http://www.info-zip.org/ >> > >> > Mateusz >> > >> > >> > >> > On 03/06/2015 03:52, Don Flowers wrote: >> >> I've recently become aware of some incompatibility between our FreeDOS >> >> unzip, Linux unzip and the legacy Pkunzip versions 2.04 and 2.50. I >> >> download hundreds of SIMTEL/BBS and other vintage files a month and I >> >> know that statistically a percentage of those will be incomplete or >> have >> >> CRC errors. But files that I know are complete are not being >> >> uncompressed properly. This almost always shows up in a blank README >> >> file. I typically download and unzip with linux but when I noticed this >> >> anomaly I switched to FreeDOS unzip and noticed some improvement, but >> >> when I switched to pkunzip the number of blank files has dropped >> >> dramatically. Has anyone else noticed this? >> >> >> > >> > >> > >> -- >> > ___ >> > Freedos-user mailing list >> > Freedos-user@lists.sourceforge.net >> > https://lists.sourceforge.net/lists/listinfo/freedos-user >> >> >> -- >> ___ >> Freedos-user mailing list >> Freedos-user@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/freedos-user >> > > -- ___ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
Re: [Freedos-user] Zip vs Pkzip
I am currently running kubuntu 14.04 , 14.10 and Zorin OS 9 (14.04) but this started as early as 12.04. It is not the mirror per se - I can go back to what I thought was a bad download and (pk)unzip it and it turns out to be complete. On Wed, Jun 3, 2015 at 3:38 AM, Louis Santillan wrote: > Also, Info-Zip has a zipinfo binary. The verbose output (-v) might > tell you something. > > On Wed, Jun 3, 2015 at 12:29 AM, Mateusz Viste wrote: > > This is something you might want to report to the Info-Zip team instead > > of here. Don't forget to provide them with an example of a file that is > > correctly decompressed by pkunzip, but not by unzip. > > > > http://www.info-zip.org/ > > > > Mateusz > > > > > > > > On 03/06/2015 03:52, Don Flowers wrote: > >> I've recently become aware of some incompatibility between our FreeDOS > >> unzip, Linux unzip and the legacy Pkunzip versions 2.04 and 2.50. I > >> download hundreds of SIMTEL/BBS and other vintage files a month and I > >> know that statistically a percentage of those will be incomplete or have > >> CRC errors. But files that I know are complete are not being > >> uncompressed properly. This almost always shows up in a blank README > >> file. I typically download and unzip with linux but when I noticed this > >> anomaly I switched to FreeDOS unzip and noticed some improvement, but > >> when I switched to pkunzip the number of blank files has dropped > >> dramatically. Has anyone else noticed this? > >> > > > > > > > -- > > ___ > > Freedos-user mailing list > > Freedos-user@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/freedos-user > > > -- > ___ > Freedos-user mailing list > Freedos-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freedos-user > -- ___ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
Re: [Freedos-user] Zip vs Pkzip
Also, Info-Zip has a zipinfo binary. The verbose output (-v) might tell you something. On Wed, Jun 3, 2015 at 12:29 AM, Mateusz Viste wrote: > This is something you might want to report to the Info-Zip team instead > of here. Don't forget to provide them with an example of a file that is > correctly decompressed by pkunzip, but not by unzip. > > http://www.info-zip.org/ > > Mateusz > > > > On 03/06/2015 03:52, Don Flowers wrote: >> I've recently become aware of some incompatibility between our FreeDOS >> unzip, Linux unzip and the legacy Pkunzip versions 2.04 and 2.50. I >> download hundreds of SIMTEL/BBS and other vintage files a month and I >> know that statistically a percentage of those will be incomplete or have >> CRC errors. But files that I know are complete are not being >> uncompressed properly. This almost always shows up in a blank README >> file. I typically download and unzip with linux but when I noticed this >> anomaly I switched to FreeDOS unzip and noticed some improvement, but >> when I switched to pkunzip the number of blank files has dropped >> dramatically. Has anyone else noticed this? >> > > > -- > ___ > Freedos-user mailing list > Freedos-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freedos-user -- ___ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
Re: [Freedos-user] Zip vs Pkzip
This is something you might want to report to the Info-Zip team instead of here. Don't forget to provide them with an example of a file that is correctly decompressed by pkunzip, but not by unzip. http://www.info-zip.org/ Mateusz On 03/06/2015 03:52, Don Flowers wrote: > I've recently become aware of some incompatibility between our FreeDOS > unzip, Linux unzip and the legacy Pkunzip versions 2.04 and 2.50. I > download hundreds of SIMTEL/BBS and other vintage files a month and I > know that statistically a percentage of those will be incomplete or have > CRC errors. But files that I know are complete are not being > uncompressed properly. This almost always shows up in a blank README > file. I typically download and unzip with linux but when I noticed this > anomaly I switched to FreeDOS unzip and noticed some improvement, but > when I switched to pkunzip the number of blank files has dropped > dramatically. Has anyone else noticed this? > -- ___ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
Re: [Freedos-user] Zip vs Pkzip
Hi, On Jun 2, 2015 8:53 PM, "Don Flowers" wrote: > > I've recently become aware of some incompatibility between > our FreeDOS unzip, Linux unzip and the legacy Pkunzip > versions 2.04 and 2.50. I download hundreds of SIMTEL/BBS > and other vintage files a month and I know that statistically > a percentage of those will be incomplete or have CRC errors. What Simtel mirror are you using? Have you tried a different site? > But files that I know are complete are not being uncompressed > properly. This almost always shows up in a blank README file. This could also be a connection error on your end, whether faulty hardware or software. > I typically download and unzip with linux but when I noticed > this anomaly I switched to FreeDOS unzip and noticed some > improvement, but when I switched to pkunzip the number > of blank files has dropped dramatically. Has anyone else > noticed this? Which Info-Zip? 5.52 or 6.00? DJGPP (32-bit) or 16-bit? LFNs or SFNs? Keep in mind that there are various other unzipping tools (e.g. DJTAR or Doszip or p7zip). I've personally not seen any errors in recent memory, and (as Louis already suggested) I often run "unzip -t". -- ___ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
Re: [Freedos-user] Zip vs Pkzip
With Info-Zip (FreeDOS, djgpp, Linux) and pkzip, you can always the test the file with "-t" (or "-test") command. Which specific version of Info-Zip have you been using? A specific Info-Zip version and a specific zip file to test against would go a long way to helping you. On Tue, Jun 2, 2015 at 6:52 PM, Don Flowers wrote: > I've recently become aware of some incompatibility between our FreeDOS > unzip, Linux unzip and the legacy Pkunzip versions 2.04 and 2.50. I download > hundreds of SIMTEL/BBS and other vintage files a month and I know that > statistically a percentage of those will be incomplete or have CRC errors. > But files that I know are complete are not being uncompressed properly. This > almost always shows up in a blank README file. I typically download and > unzip with linux but when I noticed this anomaly I switched to FreeDOS unzip > and noticed some improvement, but when I switched to pkunzip the number of > blank files has dropped dramatically. Has anyone else noticed this? > > -- > > ___ > Freedos-user mailing list > Freedos-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freedos-user > -- ___ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
[Freedos-user] Zip vs Pkzip
I've recently become aware of some incompatibility between our FreeDOS unzip, Linux unzip and the legacy Pkunzip versions 2.04 and 2.50. I download hundreds of SIMTEL/BBS and other vintage files a month and I know that statistically a percentage of those will be incomplete or have CRC errors. But files that I know are complete are not being uncompressed properly. This almost always shows up in a blank README file. I typically download and unzip with linux but when I noticed this anomaly I switched to FreeDOS unzip and noticed some improvement, but when I switched to pkunzip the number of blank files has dropped dramatically. Has anyone else noticed this? -- ___ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
