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Re: [PATCH v4 0/3] vfs: Define new syscall umask2 [formerly getumask]

From "Richard W.M. Jones" <rjones@redhat.com>
Newsgroups linux.kernel
Subject Re: [PATCH v4 0/3] vfs: Define new syscall umask2 [formerly getumask]
Date 2016-04-13 23:00 +0200
Message-ID <rnA3f-7bV-1@gated-at.bofh.it> (permalink)
References <rnykN-65O-5@gated-at.bofh.it> <rnyXw-6oK-17@gated-at.bofh.it> <rnzTA-78a-21@gated-at.bofh.it>
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On Wed, Apr 13, 2016 at 10:45:05PM +0200, Florian Weimer wrote:
> * H. Peter Anvin:
> 
> > I have to say I'm skeptic to the need for umask2() as opposed to
> > getumask().
> 
> I find the extension with a set-the-thread umask somewhat unlikely.
> How would a potential per-thread umask interact with CLONE_FS?
> Have a per-thread umask that, when active, overrides the global
> one, similar to what uselocale provides?  That seems rather messy,
> and I'm not aware of any precedent.

The flags parameter is for extensions we can't envisage now ...

... although since umask has been around since Unix V6 in 1978, we
might be waiting a long time.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
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[PATCH v4 0/3] vfs: Define new syscall umask2 [formerly getumask] "Richard W.M. Jones" <rjones@redhat.com> - 2016-04-13 21:10 +0200
  [PATCH v4 2/3] x86: Wire up new umask2 system call on x86. "Richard W.M. Jones" <rjones@redhat.com> - 2016-04-13 21:10 +0200
  umask2 man page (was: Re: [PATCH v4 0/3] vfs: Define new syscall  umask2 [formerly getumask]) "Richard W.M. Jones" <rjones@redhat.com> - 2016-04-13 21:40 +0200
  Re: [PATCH v4 0/3] vfs: Define new syscall umask2 [formerly getumask] "H. Peter Anvin" <hpa@zytor.com> - 2016-04-13 21:50 +0200
    Re: [PATCH v4 0/3] vfs: Define new syscall umask2 [formerly getumask] Florian Weimer <fw@deneb.enyo.de> - 2016-04-13 22:50 +0200
      Re: [PATCH v4 0/3] vfs: Define new syscall umask2 [formerly getumask] "Richard W.M. Jones" <rjones@redhat.com> - 2016-04-13 23:00 +0200
  Re: [PATCH v4 0/3] vfs: Define new syscall umask2 [formerly  getumask] Stephen Rothwell <sfr@canb.auug.org.au> - 2016-04-14 01:10 +0200
    Re: [PATCH v4 0/3] vfs: Define new syscall umask2 [formerly getumask] "Richard W.M. Jones" <rjones@redhat.com> - 2016-04-14 11:20 +0200

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