LHA archives on Linux

[AlfredOne]

Hello,
I'm trying to build adtools to cross-compile for AmigaOS4.1 on Linux Mint.
I have a problem extracting the "base.lha" archive contained in SDK 53.34.
The base.lha contains the following empty directories:
- Include/include_h/exec
- Include/include_h/expansion
- Include/include_h/utility
On AmigaOS4 empty directories are extracted correctly as empty directories.
On Linux Mint the lha command fails to extract the exec directory and all subsequent ones.
I tried to use 7z and it goes a little better: it manages to extract everything correctly except the empty directories which it interprets as a file of size 0 instead.

Anyone know a way to more reliably extract archives on Linux?

[Raziel]

Which lha command/program does linux mint use?

Have you tried lhasa?

sudo apt install lhasa

It's just for unpacking, but maybe works for you

[AlfredOne]

lhasa was the first tool I used and opened a bug on the github site:
https://github.com/fragglet/lhasa/issues/37

This is the answer from the author of lhasa:

"The problem is that the item that should have been a directory (type "lhd") is erroneously stored as a regular file (type "lh0"), due to a bug in whatever program created the LHA file. The item does not have a filename; it only has a directory name. Lhasa treats a file without a filename as a fatal error."

So it seems that the program used to create the AmigaOS SDK lha archive has a bug.
Note: despite the bug, on AmigaOS4 I am able to extract empty directories correctly.

[walkero]

@AlfredOne

Try to compile a proper version of lha

Code: Select all

    git clone https://github.com/jca02266/lha.git;
    mkdir build;
    cd lha;
    autoreconf -vfi;
    cd ../build;
    ../lha/configure --prefix=/usr;
    make;
    make install;

That's what I am doing in my docker images for the cross-compiling environments I use.
https://github.com/walkero-gr/docker4AmigaVBCC
https://github.com/walkero-gr/AmigaGCConDocker

[rjd324]

Linking this to https://github.com/sba1/adtools/issues/112. I came across the same issue.

Just for completeness.

[Hypex]

So it seems that the program used to create the AmigaOS SDK lha archive has a bug.
Note: despite the bug, on AmigaOS4 I am able to extract empty directories correctly.

This would explain a lot. I have found extracting LhA files on Linux doesn't work on newer archives or archives I pack from OS4. I tend to use DOpus but they always tend to break. It looks like a crash. I open an archive and it just quits when reading it.

Doesn't matter what I try. Rarely do any LhA files fork for me in Linux. Could be -lha5- or -lha6- but Linux doesn't like them.

It's really annoying as I always want to read an LhA archive on Linux a lot.

[Hypex]

Try to compile a proper version of lha

Thanks. I'll give this a shot.