From: "H. Peter Anvin" <hpa@zytor.com>
To: linux-kernel@vger.kernel.org
Subject: Re: Question about /proc/kmsg semantics..
Date: 30 Apr 2001 22:33:09 -0700 [thread overview]
Message-ID: <9clhql$lep$1@cesium.transmeta.com> (raw)
In-Reply-To: <20010501005237.A2776@sync.nyct.net>
Followup to: <20010501005237.A2776@sync.nyct.net>
By author: Michael Bacarella <mbac@nyct.net>
In newsgroup: linux.dev.kernel
>
> I've seen a couple of patches in the archives to make open()/close()
> on /proc/kmsg do more than NOP. As of 2.4.4, klogd still needs to
> run as root since access is checked on read() rather than once at
> open(). I can't find the rationale as to why they're rejected.
>
> Also, why is reading /proc/kmsg a privileged operation, yet dmesg
> can happily print out the entire ring via (do_)syslog() ?
>
Probably because reading /proc/kmsg may cause syslogd to miss
messages.
-hpa
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt
prev parent reply other threads:[~2001-05-01 5:33 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-05-01 4:52 Question about /proc/kmsg semantics Michael Bacarella
2001-05-01 5:33 ` H. Peter Anvin [this message]
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