bsdtar: "Truncated tar archive: Unknown error" on extracting archive containing sparse file

[M-a-r-k]

I'm using version 3.7.3 of bsdtar on Windows 10 x64.

After creating a tar archive containing a single sparse file, there is an issue on extracting it. A (possibly bogus?) error message is shown, but it seems that the complete file is extracted correctly.

>bsdtar --version
bsdtar 3.7.3 - libarchive 3.7.3 zlib/1.3 liblzma/5.4.4 bz2lib/1.1.0 libzstd/1.5.5


>bsdtar.exe -vScf test3.tar NetBSD_10.0_4GB_HD.bin
a NetBSD_10.0_4GB_HD.binbsdtar.exe: (null)


>bsdtar.exe -vxf test3.tar
x NetBSD_10.0_4GB_HD.bin: Truncated tar archive: Unknown error
bsdtar.exe: Error exit delayed from previous errors.

The tar archive (compressed with Zip) is attached. ~3MB.
test3_tar.zip

[kientzle]

This is the same issue already reported in #2125

[M-a-r-k]

Oh, I assumed the issue was different, since in this case bsdtar does extract the file correctly (extracted size 4,000,000,000 bytes). Whereas in #2125 the file was corrupted on extraction with no error message.

[kientzle]

This is different, actually. This file is in GNU pax sparse format 1.0.

To double-check my understanding, this file was created by bsdtar on Windows 10? It does indeed appear to be subtly malformed. I'll have to dig into it a bit to try to figure out how this happened. Thanks for reporting it.

[M-a-r-k]

I used bsdtar 3.7.3 on Windows (10 and 11) to create and extract the archive. Hopefully you can reproduce the issue by just extracting it, then using the commands I pasted above.

[M-a-r-k]

Another point of information...

If when creating the archive you specify more than one file, the second and subsequent files are not actually added to the archive! For example:

> echo "Hi Tim!!!" >hello.txt
> echo "this is a sample" >sample.txt
> bsdtar -vScf oops.tar NetBSD_10.0_4GB_HD.bin hello.txt sample.txt
a NetBSD_10.0_4GB_HD.binbsdtar: (null)

The archive created is missing the two text files.