Add fchmodat2() - or add a more general syscall?

Christian Brauner brauner at
Thu Jul 27 20:27:42 AEST 2023

On Wed, Jul 26, 2023 at 08:57:10PM -0700, Eric Biggers wrote:
> On Tue, Jul 25, 2023 at 04:58:34PM +0100, David Howells wrote:
> > Rather than adding a fchmodat2() syscall, should we add a "set_file_attrs()"
> > syscall that takes a mask and allows you to set a bunch of stuff all in one
> > go?  Basically, an interface to notify_change() in the kernel that would allow
> > several stats to be set atomically.  This might be of particular interest to
> > network filesystems.
> > 
> > David
> > 
> fchmodat2() is a simple addition that fits well with the existing syscalls.
> It fixes an oversight in fchmodat().
> IMO we should just add fchmodat2(), and not get sidetracked by trying to add
> some super-generalized syscall instead.  That can always be done later.


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