Re: 2.0.3x Kernel feature - immutable and append only files
On Thu, Dec 17, 1998 at 02:11:25PM +0000, Oliver Elphick wrote:
> Joerg Friedrich wrote:
> >And this is Alan Cox' note:
> >Linux 2.0.36 fixed various security holes as does any stable OS update.
> > mmap on append only files has to be restricted to read maps.
> What utilities (if any) support append only and immutable files? It doesn't
> seem to be a feature of chmod and apropos produces nothing for immutable,
> append or acl. There doesn't seem to be a chacl program anywhere.
> Does the fileutils package need to be upgraded to support this feature?
chattr - change file attributes on a Linux second extended
chattr [ -RV ] [ -v version ] [ mode ] files...
chattr changes the files attributes on an second extended
The format of a symbolic mode is +-=[ASacdisu].
The operator `+' causes the selected attributes to be
added to the existing attributes of the files; `-' causes
them to be removed; and `=' causes them to be the only
attributes that the files have.
The letters `ASacdisu' select the new attributes for the
files: don't update atime (A), synchronous updates (S),
append only (a), compressed (c), immutable (i), no dump
(d), secure deletion (s), and undeletable (u).
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