Re: Help! File permissions keep changing...

[Jose Alberto Guzman <jguzman@iteso.mx>]

From the manual page of umask  (  man umask  ):

    umask sets the umask to mask & 0777.

       The  umask  is  used  by  open(2)  to set initial file 
permissions on a newly-created file.  Specifically, permissions in the 
umask are  turned off  from  the  mode  argument  to open(2) (so, for 
example, the common umask default value of 022 results in new files 
being created with permissions  0666  &  ~022  = 0644 = rw-r--r-- in the 
usual case where the mode is specified as 0666).


 What this means, is that whatever umask you specify, it is ANDed with 
0777.

 So an umask of 000 would yield 777 permissions, 007 would yield 770 
and so on.


Hhayes wrote:
> What do I need to change the 022 setting to be for -rwxrwx---  ?
>
> "John Hardcastle" <johnhardcastle@ihug.co.nz> wrote in message
> news:1qmvW-6mW-21@gated-at.bofh.it...
>
> > So the default file permissions don't do what you want.
> > $  umask
> > Read the manual page for the umask command,
> > $ man umask
> > As root, change the umask in /etc/profile to reflect the permissions you
> > want.
> > # vi /etc/profile
> > Then have all users logout and login again.  Their $HOME/.bashrc will
> > read /etc/profile and their umask will reflect your changes.
> >
> > John
> >
> > On 02/18/04 10:12, Hhayes wrote:
> >
> >
> > > I have a Debian box running as a file server on a network with 50 users.
>
> So
>
> > > far it works great except for the user/file permissions. I can go into a
> > >
> > > directory and set the owner and group permissions to read/write on all
> > >
> > > files in the directory and that works fine. Then as soon as one of the
> > >
> > > users opens a file and saves it, the permissions on that file change to
>
> read
>
> > > only for the group permissions and changes the owner to the user that
>
> just
>
> > > saved the file, resulting in a file that no other users can write to. Has
> > >
> > > anyone ever seen this before?
> >
> >
> > --
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