On 17:34 25 Jun 2004, Robert P. J. Day <rpjday@xxxxxxxxxxxxxx> wrote:
| say i have a directory structure a/b/c/{f1,f2,f3,...}. for access
| reasons, i decide to change the permissions on the "c" directory,
| perhaps changing the owner/group, and definitely changing the perms to
| include "setgid".
| later, i get a tarball with contents a/b/c/{something}. i found out
| that if i extract that tarball while root, and the effect is to add or
| delete files under the "c" directory, the permissions on "c" revert
| back to default values. how annoying.
I think you'll find the tarball also has "a/b/c" in it too.
| apparently, as long as what i'm extracting is already in that
| directory (so that the directory entries themselves don't change), i'm
| safe. but if the extraction changes the directory contents
| themselves, i get the owner/group/perms resetting on "c", which i'd
| *really* like to avoid.
|
| i've perused the tar options, and i don't see anything that says,
| "don't mess with existing options on existing directories." is there
| a standard approach to handle this?
1: Don't extract as root?
2: Note perms, extract, fix perms.
3: Extract only the files - avoid the directories.
A tar file has entries for the dirs, which is of course where the perms are.
Don't as for them:
tar xvf tarfile a/b/c/f1 a/b/c/f2 ...
You could do this algorithmicly by doing a table of contents,
sucking out the filenames, then doing the extract.
Cheers,
--
Cameron Simpson <cs@xxxxxxxxxx> DoD#743
http://www.cskk.ezoshosting.com/cs/
Gauls! We have nothing to fear; except perhaps that the sky may fall
on our heads tomorrow. But as we all know, tomorrow never comes!!
- Adventures of Asterix
