From: Theodore Ts'o <tytso-3s7WtUTddSA@public.gmane.org>
To: Mathieu Desnoyers
<mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
Cc: "Richard W.M. Jones"
<rjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
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"H. Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>,
Andrew Morton
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zab <zab-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
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"Paul E. McKenney"
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Andrea Arcangeli
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Davidlohr Bueso <dave-h16yJtLeMjHk1uMJSBkQmQ@public.gmane.org>,
linux-api <linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
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fw-d32yF4oPJVt0XxTmqZlbVQ@public.gmane.org,
Linus Torvalds <torvalds@linux-found>
Subject: Re: [PATCH v2 0/2] vfs: Define new syscall getumask.
Date: Wed, 13 Apr 2016 22:13:48 -0400 [thread overview]
Message-ID: <20160414021348.GB16656@thunk.org> (raw)
In-Reply-To: <1736004700.56566.1460581285951.JavaMail.zimbra-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
On Wed, Apr 13, 2016 at 09:01:25PM +0000, Mathieu Desnoyers wrote:
> I'm actually discussing 3 separate things here: the umask, sigmask, and
> cpu affinity mask.
The last two are available in /proc/<pid>/status --- which brings up
the question why not just add umask to /proc/<pid>/status?
That way the shared library can read it via /proc/self/status, but
this way it would be possible to look at other process's umask values
this as well.
> >> Another approach to this has been attempted before, adding something
> >> to /proc, although it didn't go anywhere. See:
> >>
> >> http://comments.gmane.org/gmane.linux.kernel/1292109
... and indeed that's what I suggested. It looks like from the thread
that it petered out due to apathy instead of people not liking the
idea.
One other reason to suggest using a /proc file is that you're not at
the mercy of the glibc folks to wire up a new system call. (Glibc has
been refusing to wire up getrandom(2), for example. Grrrr.....)
- Ted
next prev parent reply other threads:[~2016-04-14 2:13 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-13 12:57 [PATCH v2 0/2] vfs: Define new syscall getumask Richard W.M. Jones
2016-04-13 12:57 ` [PATCH v2 1/2] " Richard W.M. Jones
[not found] ` <1460552272-15985-2-git-send-email-rjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-04-13 13:20 ` Cyrill Gorcunov
2016-04-13 13:57 ` Richard W.M. Jones
[not found] ` <20160413135708.GG11600-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-04-13 14:02 ` Christoph Hellwig
2016-04-13 15:27 ` Mathieu Desnoyers
[not found] ` <1460552272-15985-1-git-send-email-rjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-04-13 12:57 ` [PATCH v2 2/2] x86: Wire up new getumask system call on x86 Richard W.M. Jones
2016-04-13 13:59 ` [PATCH v2 0/2] vfs: Define new syscall getumask Greg KH
2016-04-14 3:47 ` Steven Rostedt
2016-04-14 19:26 ` Greg KH
2016-04-13 15:39 ` Mathieu Desnoyers
[not found] ` <2143735451.55767.1460561962122.JavaMail.zimbra-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
2016-04-13 21:01 ` Mathieu Desnoyers
[not found] ` <1736004700.56566.1460581285951.JavaMail.zimbra-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>
2016-04-14 2:13 ` Theodore Ts'o [this message]
[not found] ` <20160414021348.GB16656-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2016-04-18 0:38 ` H. Peter Anvin
[not found] ` <57142C80.6070005-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2016-04-18 1:09 ` Greg KH
[not found] ` <20160418010925.GA7800-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2016-04-18 2:02 ` H. Peter Anvin
2016-04-18 2:12 ` Josh Triplett
2016-04-18 2:15 ` H. Peter Anvin
2016-04-18 2:37 ` Josh Triplett
2016-04-18 3:00 ` H. Peter Anvin
[not found] ` <57144DE6.9050409-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2016-04-18 11:39 ` Theodore Ts'o
2016-04-14 17:56 ` Andy Lutomirski
2016-04-13 15:41 ` Colin Walters
[not found] ` <1460562105.353100.577697153.013DF466-2RFepEojUI2N1INw9kWLP6GC3tUn3ZHUQQ4Iyu8u01E@public.gmane.org>
2016-04-13 16:03 ` Richard W.M. Jones
2016-04-18 1:42 ` H. Peter Anvin
[not found] ` <57143B74.3070302-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2016-04-18 1:57 ` Josh Triplett
2016-04-18 9:14 ` Richard W.M. Jones
2016-04-18 10:04 ` H. Peter Anvin
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