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From: Jamie Lokier <lk@tantalophile.demon.co.uk>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Linus Torvalds <torvalds@transmeta.com>,
	Paul Larson <plars@austin.ibm.com>,
	Hubertus Franke <frankeh@us.ibm.com>,
	Rik van Riel <riel@conectiva.com.br>,
	Andries Brouwer <aebr@win.tue.nl>,
	Andrew Morton <akpm@zip.com.au>,
	andrea@suse.de, Dave Jones <davej@suse.de>,
	lkml <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Linux-2.5 fix/improve get_pid()
Date: Sun, 11 Aug 2002 20:58:47 +0100	[thread overview]
Message-ID: <20020811205847.A3206@kushida.apsleyroad.org> (raw)
In-Reply-To: <1029098474.16236.58.camel@irongate.swansea.linux.org.uk>; from alan@lxorguk.ukuu.org.uk on Sun, Aug 11, 2002 at 09:41:14PM +0100

Alan Cox wrote:
> If they hold both handles open and stat them and find the same inode
> number then yes its a bug. We have lots of room for inode numbers to
> handle 2^30 processes and allow for 2^30 other files

So, in general, the way to detect hard links requires both objects to be
open at the same time?  I was sure it was enough to stat(), and check
(st1.st_ino == st2.st_ino && st1.st_dev == st2.st_dev).

Admittedly, one of the object could be renamed or deleted in that time
so it's not 100% reliable on changing filesystems.

Ah well.

-- Jamie

  reply	other threads:[~2002-08-11 19:57 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-08-08 21:43 Hubertus Franke
2002-08-08 22:02 ` Linus Torvalds
2002-08-08 22:26   ` Linus Torvalds
2002-08-08 23:09     ` Albert D. Cahalan
2002-08-09  3:26       ` Chris Adams
2002-08-09  7:04         ` Albert D. Cahalan
2002-08-09  8:48           ` Helge Hafting
2002-08-09 10:32             ` Alan Cox
2002-08-09  9:35               ` Andrew Morton
2002-08-09 10:37               ` Andries Brouwer
2002-08-09 13:00           ` Chris Adams
2002-08-09 14:39             ` Albert D. Cahalan
2002-08-09 13:59           ` Rik van Riel
2002-08-09 14:57             ` Albert D. Cahalan
2002-08-08 22:34   ` Paul Larson
2002-08-08 22:44     ` Rik van Riel
2002-08-08 22:37   ` Rik van Riel
2002-08-09  1:49     ` Andries Brouwer
2002-08-09 19:34   ` Paul Larson
2002-08-09 20:13     ` Paul Larson
2002-08-09 20:40     ` Andries Brouwer
2002-08-09 21:23     ` Linus Torvalds
2002-08-09 21:42       ` Linus Torvalds
2002-08-09 21:46         ` Paul Larson
2002-08-09 22:04           ` Linus Torvalds
2002-08-10 17:23             ` Jamie Lokier
2002-08-10 18:33               ` Linus Torvalds
2002-08-10 18:48                 ` Jamie Lokier
2002-08-11 20:41                   ` Alan Cox
2002-08-11 19:58                     ` Jamie Lokier [this message]
2002-08-11 21:23                       ` Alan Cox
2002-08-11 20:10                         ` Jamie Lokier
2002-08-12  8:56             ` Padraig Brady
2002-08-12 10:37               ` Alan Cox
2002-08-12  9:21                 ` Padraig Brady
2002-08-12 14:40             ` Paul Larson
  -- strict thread matches above, loose matches on Subject: below --
2002-08-12 16:15 Jim Houston
2002-08-09  0:53 Hubertus Franke
2002-08-08 21:50 Hubertus Franke
2002-08-08 18:56 Hubertus Franke
2002-08-08 19:15 ` Rik van Riel
2002-08-08 19:18 ` Paul Larson
2002-08-07 22:03 Paul Larson
2002-08-07 23:06 ` Andrew Morton
2002-08-08  0:24   ` Andries Brouwer
2002-08-08 19:42     ` William Lee Irwin III
2002-08-08 20:47       ` Andries Brouwer
2002-08-08 20:24   ` Linus Torvalds
2002-08-08 21:30     ` H. Peter Anvin
2002-08-08 21:45     ` William Lee Irwin III
2002-08-09  4:42     ` William Lee Irwin III

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