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

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On Thu, Apr 14, 2016 at 09:09:38AM +1000, Stephen Rothwell wrote:
> Hi Richard,
> 
> On Wed, 13 Apr 2016 20:05:33 +0100 "Richard W.M. Jones" <rjones@redhat.com> wrote:
> >
> > It's not possible to read the process umask without also modifying it,
> > which is what umask(2) does.  A library cannot read umask safely,
> > especially if the main program might be multithreaded.
> 
> I was wondering if you really need to read the umask, or would just a
> "ignore umask" flag to open{,at} do what you want?

This would be very useful, although I think being able to read umask
is also useful.

---

FWIW I am currently developing a patch to add umask to
/proc/PID/status.  Will post it shortly once I've tested it properly.

Rich.

-- 
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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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