12 Oct
2022
12 Oct
'22
2:41 a.m.
On Tue, Oct 11, 2022 at 4:14 PM Chris Zach via cctalk <cctalk(a)classiccmp.org>
wrote:
Trying to tar a directory and transfer it to my
AT&T 7300 (SVR2 unix).
Tar -tf works fine on the Mac OSX, but when I copy it over the Unix (not
gnu) tar gives me a:
Tar: blocksize = 20
directory checksum error
When I try to tar -tf the file. Which usually means the block size is off.
Any way I can check to see what the block size is on a modern system
(like a Mac)? tar -tvf doesn't seem to tell me.
All tar files are the same... except when they are different.
MacOS uses libarchive tar. This version of tar creates the most modern tar
files from the
mid 90s.
However, System V r2 pre-dates that. There's a lot of different tar
formats, that are almost
the same. I'm guessing that --format pax might work, but it might not.
--format ustar like is
the most interchangeable format, and will likely work. It's the
least-restrictive format that
will most likely work. --format v7 will almost certainly work, but has more
restrictions that
might run into, most likely its inability to use anything except numeric
IDs.
Warner