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Topic: Creating .unc extensions for unionfs?, Can't get all the pieces to fit.....

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firecat53

Group: Members
Posts: 22
Joined: July 2006

Posted: Aug. 07 2006,02:48

Could someone post a short guide on creating the new .unc extensions for the unionfs or point me where to find the info? I've searched the forums and the wiki, finding the bits on creating .dsl and .uci extensions, and a little on how to use the unionfs, but I can't quite make the leap to actually get the .unc to work.

Thanks!
Scott

clacker

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Posts: 570
Joined: June 2004

Posted: Aug. 07 2006,12:34

firecat53, try looking here where robert explains it.

The easiest way to make a *.unc is to make a working *.dsl first. Put the myapp.dsl in /home/dsl and do the following (copied from robert's post but I added the --same-owner switch to the tar command):

1. mkdir myapp
2. cd myapp
3. sudo tar -zxvf ../myapp.dsl --same-owner
4. find home tmp -type f | xargs tar -czvf user.tar.gz
5. rm -rf home/ tmp/
6. cd ..
7 mkisofs -R -hide-rr-moved -cache-inodes -pad myapp/ | create_compressed_fs - 65536 > myapp.unc

firecat53

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Posts: 22
Joined: July 2006

Posted: Aug. 09 2006,15:21

Thanks for the reply, clacker! I missed that post.

Scott

Winter Knight Offline

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Posts: 146
Joined: April 2006

Posted: Aug. 09 2006,19:56

That script might not work unless you make the following changes:

5. sudo rm -rf home/ tmp/

Because of your change to #3, keeping the same owner, it is possible that files in home and tmp have files belonging to root. If there are, these files won't be deleted, and neither will home and tmp. Then the offending file, home and tmp will be included in the final unc.

I was thinking that 4 might need a sudo as well, but it doesn't. The permissions will be default permissions, which give everyone the right to read, no matter who the owner is.

clacker

Group: Members
Posts: 570
Joined: June 2004

Posted: Aug. 09 2006,20:02

Good point, thanks. If there were files like that in /home or /tmp it could be a problem.

4 replies since Aug. 07 2006,02:48

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Damn Small Linux Board » Damn Small Linux » Other Help Topics » Creating .unc extensions for unionfs?