[ale] Specify permissions, owner, and group of newly created files

[Rick Huebner]

Ok.  I think that this will work for me. Thanks


Rick Huebner

-----Original Message-----
From: ale-bounces at ale.org [mailto:ale-bounces at ale.org] On Behalf Of Mike
Murphy
Sent: Wednesday, September 01, 2004 3:16 PM
To: Atlanta Linux Enthusiasts
Subject: Re: [ale] Specify permissions, owner, and group of newly created
files

you can use set uid and set gid bits on directories to force files created
in them to be owned by a certain user and/or group. For instance, in places
where I have lots of users, and lots of files, but I want to make sure that
said files stay writable by a certain group, I:

mkdir directory
chgrp mygrp directory
chmod g+ws directory (the w makes it writable by group, the s set's the gid
bit)

that still doesn't ensure that the files in there get created group
writable, it just ensures that they get the group set to "mygrp". To make
them group writable, the umask of the creating process (be it an ftp server,
or a shell, or whatever) would have to change. Something like "umask 002"
would do it. That would make a new file created by that user get mode 664,
and a new directory get 775.

You can do similar tricks with the user by setting a directory to be owned
by some user, and then doing a 'chmod u+ws'. If its not group writable
though, the created files wouldn't ever be updatable by anyone but that
user, so some combination of user and group permissions are probably in
order.

You can usually set default permissions and user and group ownership on a
server you might be using, be it most ftp servers, or samba, which also
might solve your problem.

Mike


Rick Huebner wrote:
> I've always wondered how to make new files created in a directory be 
> created with a specific permission, owner, and group.  Right now, I 
> have a series of cron jobs that run to change the permissions in 
> several directories each hour.  Is there any way on a per directory basis
to do this?
>  
> Rick
> 
> 
> _______________________________________________
> Ale mailing list
> Ale at ale.org
> http://www.ale.org/mailman/listinfo/ale


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Mike Murphy
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Email: mike at tyderia.net
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