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Re: Automatically maintaining permissions on specific directories

On Sunday 18 September 2005 02.37, Clive Menzies wrote:
> On (18/09/05 01:39), Olle Eriksson wrote:
> > Is there any way to enforce the permissions on a specific directory
> > so that everything that is in it will always have the correct
> > permissions?
> >
> > I know a simple cron job can do the job but I have fucked up more
> > file and directory permissions than wanted on more than one occasion
> > this way. And also, it would be nice to know that any files moved to
> > a certain directory (like public_html) will get the correct
> > permissions instantly without having to issue a chmod command or wait
> > for the cron job to finish.
> >
> > I used to have a partition with the FAT32 filesystems, which allows
> > you to set global values for user id, group id and permissions (with
> > uid, gid, umask, dmask and fmask). Then, all files moved to this
> > filesystem would get the specified permissions automatically. A while
> > ago I switched to XFS because I needed to be able to have files
> > larger than 2 Gb, and XFS doesn't have these features.
> When I asked this question, someone posted something like this:
> Prepare a directory hierarchy for group use, do the following as
> root:
> # chgrp -R $group $dir
> # find $dir -type d -print0 | xargs -0 chmod 2770
> (You can use mode 2775, depending on needs for further information see
> 'man chmod' and google on Linux permissions)
> # sudo find $dir -type f -print0 | xargs -0 chmod 660
> (likewise, you may also use mode 664...)
> An alternative to the above is:
> # sudo find $dir -type f -print0 | xargs -0 chmod g=u,o=-rwx
> This will clear permissions for others and set group permissions to the
> user permissions. This will preserve executable permissions.  Give
> yourself membership of the various groups to test permissions,
> ownership, etc.

Well all of these solutions require you to set the permissions either 
manually or via a cron script or something similar. I'm looking for 
something that will automatically do this so that the files will have the 
correct permissions as soon as they have been copied into the directory. 
Maybe pam can observe a directory and apply the permissions when it 
senses any changes to the directory's files or something. Is there 
nothing like this out there?

Olle Eriksson
mail@olle-eriksson.com | http://www.olle-eriksson.com

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