Comments on: A solution to the umask problem: inotify to force permissions

By: vskubriev

vskubriev — Mon, 24 Mar 2014 12:48:40 +0000

I encountered the same problem with ATTRIB event’s

By: vskubriev

vskubriev — Mon, 24 Mar 2014 12:47:40 +0000

dear Alecz!
Nautilus is working on his own cunning scenario – I am agree with this. But sleep 1 – this is not a good solution, because we get timeout for each file/dir for a 1 second (as is in you example).
This is a very significant reduction in performance.

By: Alecz

Alecz — Mon, 06 Jan 2014 16:04:33 +0000

I had trouble getting this to work when Using Nautilus to transfer files over to an NFS share.
It would only work when creating new Folders, but not when copying/moving.

So I did some digging and here is the command that works (note that I have not used the one for trailing spaces or backstlashes:

****************************************
inotifywait -mrq -e CREATE -e CLOSE -e MOVED_TO –format %w%f /home/alex/autochown/ | while read FILE; do `sleep 1` && chmod g=u “$FILE”; done
****************************************
Explanations of modifications:
-e CLOSE and -e MOVED_TO are the last events that Nautilus does when creating new files or copying/moving files around. This way, permissions are set after Nautilus finished the copy.

the “sleep 1″ is because when Nautilus creates a file, it changes the permissions right away. The issue is that the NFS server machine will get into a “race condition” and will change the permissions a few milliseconds before Nautilus will (all this happens in less than 0.5 seconds).

To work around this, we add a 1 second delay to the chmod command. This might only be a problem is the rate at which files are created in the folder is more than 1 per second for a very long time.

By: Boubou

Boubou — Wed, 05 Jun 2013 17:00:22 +0000

@Rchard and myself
If using -e attrib, it loops.
chmod = modification of attrib => chmod...

By: Boubou

Boubou — Wed, 05 Jun 2013 14:38:19 +0000

@Richard
You can use -e move -e attrib to avoid this problem
-e move : check the files moved or renamed
-e attrib : check the files which permissions where changed

By: Richard

Richard — Thu, 29 Nov 2012 15:14:55 +0000

Nice script, but most clients will first transfer the file and then try to set the correct permisions so only watching for create will not do the trick.

By: hatul

hatul — Tue, 22 May 2012 08:59:56 +0000

Thanks for the post

For Centos you need to add after first line:
###
# chkconfig: 2345 98 55
# description: Manages the services you are controlling with the
chkconfig command
###

and then:
chkconfig --add inotifywait.sh

By: Ölbaum

Ölbaum — Wed, 25 Apr 2012 14:16:42 +0000

Nah, incron won’t be any use because it doesn’t watch subdirectories. inotifywait is the way to go, thanks.

It’s kinda pathetic that it’s needed, though. I tried the umask and acl routes, but they both fail one way or the other with samba, netatalk and/or sftp.

By: Marc

Marc — Wed, 09 Mar 2011 22:10:07 +0000

Merci ! j'ai corrigé la coquille.

By: Yannick Duchêne (Hibou57)

Yannick Duchêne (Hibou57) — Wed, 09 Mar 2011 20:45:16 +0000

« le bit setuid au groupe pour tous les dossiers.
find /path/to/dir -type d -exec chmod g+s {} \; » :

La commande indiquée fixe le bit SGID, et non pas le bit SUID ;)