restoring a tar archive && modification time of directories

From: Matthias Apitz <guru_at_unixarea.de>
Date: Thu, 01 May 2025 15:04:12 UTC
Hello,

I do backups with something like 'tar cfz home.tgz home' and today due
to an emergency I was lucky to have such backups and did a restore with
something like 'tar xzf home.tgz'. I was suprised that now all
diretories have the today modificatguru/Adaion time, like this:

$ ls -ld Ada
drwxr-xr-x  2 guru wheel 512  1 may.  11:31 Ada
$ ls -l  Ada
total 1008
-rwxr-xr-x  1 guru wheel 977936 27 feb.   2016 hello
-rw-r--r--  1 guru wheel    124 27 feb.   2016 hello.adb
-rw-r--r--  1 guru wheel   1630 27 feb.   2016 hello.ali
-rw-r--r--  1 guru wheel   1608 27 feb.   2016 hello.o
-rw-r--r--  1 guru wheel    120 27 feb.   2016 hello.txt

In the tar archive the directory 'Ada' looks like this:

$ grep guru/Ada guru-20250501.tar.gz.lst
drwxr-xr-x  0 guru   wheel          0  8 Dez.  2020 guru/Ada/
-rw-r--r--  0 guru   wheel        124 27 Feb.  2016 guru/Ada/hello.adb
-rw-r--r--  0 guru   wheel       1630 27 Feb.  2016 guru/Ada/hello.ali
-rw-r--r--  0 guru   wheel       1608 27 Feb.  2016 guru/Ada/hello.o
-rwxr-xr-x  0 guru   wheel     977936 27 Feb.  2016 guru/Ada/hello
-rw-r--r--  0 guru   wheel        120 27 Feb.  2016 guru/Ada/hello.txt

Why is the directory guru/Ada/ not set to 8 Dez.  2020 after restoring
the files into it? Is this a bug in our bsdtar?

Thx

	matthias


-- 
Matthias Apitz, ✉ guru@unixarea.de, http://www.unixarea.de/ +49-176-38902045
Public GnuPG key: http://www.unixarea.de/key.pub

An die deutsche Bundesregierung: Nein, meine Söhne geb' ich nicht für Ihren Krieg!
Al Gobierno alemán: ¡No, no doy mis hijos para su guerra!
To the German Government: No, I will not give my sons for your war!