Hi.

I have a lha archive. Packaged on macOS with Lha v1.14i.
On AmigaOS 3 I can unpack the archive just fine with Lha 2.15.
On MorphOS, with Lha 2.7.12, it starts unpacking but some file sooner or later produces a CRC error.

What might be the problem there?
Are there any cmd line options I could try?


Manfred

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Have you tried using the 68k lha 2.15 on MorphOS?

No. What are you implying?


Manfred

lha 1.14i is available for MorphOS.
Try that Version.

I can try all that. But why the heck is the version shipped with MorphOS not able to unpack this?


Manfred

Because the MorphOS-Lha does not support all Header and Compression Methods of lha-1.14i.
Use "lha-1.14i ao6 archive files" to create a compatible archive.

[ Edited by Tom01 25.04.2017 - 21:32 ]

OK, but why does m68k Lha 2.15 unpack this but not 2.7.12?
Is 2.7.12 an older version than AmigaOS 3 m68k 2.15?

Because the m68k Lha 2.15 different to MorphOS 2.7.12.

Alright. Let me see...
I think this is quite a bit annoying. AROS (Icaros 2.1.3) with lha 1.00 can unpack the stuff, AmigaOS 3 with lha 2.15 can unpack the stuff. But MorphOS cannot unpack the stuff.
Why is MorphOS lha so much different than the other lha's?

> Are there any cmd line options I could try?

You may try using the XAD system that is part of MorphOS:

http://library.morph.zone/Shell_Commands/XADUnFile

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That works, thanks.

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That the version of lha that congress with MorphOS is incompatible with archives the Mac version creates. MorphOS itself is however compatible with many 68k binaries and you previously stated that the 68k version is compatible with the archives the Mac version creates.

From there it's not a great leap of logic to suggest trying the 68k binary is it?

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I don't want to use a 68k binary for unpacking an lha archive on MorphOS.
Nor would I want to go and download something that can do such a fundamentally important task as unpacking a LHA archive.
Even if is has been created on a different system.
Why not package up an LHA version into MorphOS that works.


Manfred

[ Edited by asrael22 26.04.2017 - 14:31 ]

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In gave you a solution that solves your problem, up to you if you'd rather just whine about it.

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Maybe because lha on different platforms was continued by different people. The programs have the same name but not always the same features or bugfixes. Also your version on OSX is verys old (lha 1.14). But it seems there is no newer one.
Maybe you can give your archive to the MOS team and they can have a look if our lha can be fixed or if your OSX lha needs a fix instead.

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Yes. 7 is smaller than 15, so 2.7.12 is older than 2.15.


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LHA of MOS works very well with tens of thousands of archives. I wouldn't say it does not work. You just use one at least 13 year old version on a never well supported platform that can create an incompatible archive.

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The solution is simple.
Just include a PPC build of 2.15 into MorphOS.

Manfred

EDIT: The actual issue here was the incompatibility between UNIX and Amiga LhA. See post here.


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MorphOS LhA doesn't currently support "lh7" compression method (which is the default of unix LhA).
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If you wish to use MorphOS LhA to decompress the archives, you can -o6 option with UNIX LhA to force the use of the supported compression method "lh6".

For example:
lha ao6 mystuff.lha mystuff


[ Edited by Piru 27.04.2017 - 22:45 ]

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I'm afraid it is not.
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For some reason Amiga LhA is not open source.

Anyway Amiga LhA has some issues. It doesn't handle large files and archive sizes for example. Just try using >4GB archive with LhA 2.15 and see it fail miserably.

[ Edited by Piru 26.04.2017 - 20:57 ]

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Uhm. That's unfortunate.
What about the LHA Unix version? Couldn't that be used instead? AROS seems to use it, too.

Alright, the lh7 compression it is which makes the incompatibility.
But I'm wondering why some files can be uncompressed. But at certain files there is this CRC error.


Manfred

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No, it lacks support for amiga attributes and comments, among other things.

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And thus AROS has a problem where their LhA doesn't support amiga attributes and comments.

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No lh7 compressed files can be decompressed. The MorphOS LhA doesn't even try.

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OK, that's a point.

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I don't understand.
I have created an archive on macOS with LHA 1.14i. If it compresses files with lh7 as default, then MorphOS shouldn't be able to uncompress any of the files?
But it does. Some files are uncompressed, like 20 or 30, don't know exactly.
Then it stops with error, always at the same file.


Manfred

> 2.7.12 is older than 2.15.

Code:
Code:
;-)

> one at least 13 year old version

"Latest commit [...] on Oct 15, 2016"
https://github.com/jca02266/lha

That's still version 1.14i as far as I can see.

> on a never well supported platform

LHa for UNIX not supporting macOS well? :-)

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Yes, you gave me a solution. Thanks for that.
If I whine, then not because I'm unable to uncompress this archive.
But for a negative user experience of MorphOS.
I whine because I'd like that fixed in future versions of MorphOS.


Manfred

[ Edited by asrael22 26.04.2017 - 22:22 ]

> I have created an archive on macOS with LHA 1.14i. If it compresses files with lh7 as
> default, then MorphOS shouldn't be able to uncompress any of the files? But it does.
> Some files are uncompressed [...]. Then it stops with error, always at the same file.

The 6th byte of the archive tells the compression method used.


Edit: That's not quite correct. The 6th byte of the archive tells the compression method used for the first object in the archive. Each object in the archive is preceded by such an indicator as different objects may have been processed using different methods.

[ Edited by Andreas_Wolf 27.04.2017 - 10:03 ]

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There is no code there to decompress lh7.

Maybe you're confused by for example directories and such being created (directories obviously are not compressed), or empty or very small files being there included without compression (lh0).