Re: restoring a tar archive && modification time of directories

El día jueves, mayo 01, 2025 a las 11:58:42a. m. -0700, Jin Guojun[VFF] escribió:

> On 5/1/25 11:33, Matthias Apitz wrote:
> > I can reproduce the problem with:
> > 
> > $ rm -r d
> > $ mkdir d
> > $ touch -t 202504300101 d/file d
> > $ ls -ld d d/file
> > drwxr-xr-x  2 guru wheel 512 30 abr.  01:01 d
> > -rw-r--r--  1 guru wheel   0 30 abr.  01:01 d/file
> > $ tar cf d.tar d
> > 
> > (without deleting the directory 'd')
> > 
> > $ tar xf d.tar
> > $ ls -ld d d/file
> > drwxr-xr-x  2 guru wheel 512  1 may.  20:25 d
> > -rw-r--r--  1 guru wheel   0 30 abr.  01:01 d/file
> > 
> > i.e. if the directories are existing (as it was in my original case
> > restoring into my HOME a backup), the modification time of the directory
> > will not be adjusted to the value in the tar archive. One could call
> > this a bug or a feature. Don't know.
> > 
> > 	matthias
> 
> This is the original "tar" behavior, which does not restore the existing
> directory timestamp.
> 
> The "mv" command actually gradually changed behavior on restoring timestamp
> since 12-R, if my memory services correct.
> 
> ...

I will repair this problem im my HOME partition. From the tar-listing I
grep'ed out all directory lines (having a '/' at the end):

drwxr-xr-x  0 guru   wheel       0  1 Mai 08:15 guru/
drwx------  0 guru   wheel       0 10 Apr. 21:48 guru/.ssh/
drwxr-xr-x  0 guru   wheel       0  1 Mai 07:40 guru/.config/
drwxr-xr-x  0 guru   wheel       0  1 Mai 08:35 guru/.cache/
drwx------  0 guru   wheel       0  5 Dez.  2020 guru/.dbus/
drwxr-xr-x  0 guru   wheel       0  5 Dez.  2020 guru/.kde/
... 22300 lines...

removed unnecessary data with vim, so the lines look like:

1 Mai 08:15 guru/
10 Apr. 21:48 guru/.ssh/
1 Mai 07:40 guru/.config/
1 Mai 08:35 guru/.cache/
5 Dez. 2020 guru/.dbus/
5 Dez. 2020 guru/.kde/
...

and wrote a shell script (attached) to generate touch-commands from the
data:

touch -t 202505010101 'guru/'
touch -t 202504100101 'guru/.ssh/'
touch -t 202505010101 'guru/.config/'
touch -t 202505010101 'guru/.cache/'
touch -t 202012050101 'guru/.dbus/'
touch -t 202012050101 'guru/.kde/'
...

	matthias

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

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