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To: Alfred Perlstein <alfred@freebsd.org>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Fri, 02 Apr 2004 11:12:54 -0800."
             <20040402191254.GK26131@elvis.mu.org> 
Date: Fri, 02 Apr 2004 21:14:34 +0200
Message-ID: <35917.1080933274@critter.freebsd.dk>
cc: alc@freebsd.org
cc: current@freebsd.org
Subject: Re: mmap breakage? 
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In message <20040402191254.GK26131@elvis.mu.org>, Alfred Perlstein writes:
>* Poul-Henning Kamp <phk@phk.freebsd.dk> [040402 10:40] wrote:
>> In message <20040402160959.GJ26131@elvis.mu.org>, Alfred Perlstein writes:
>> >I noticed that mplayer seems to want to open /dev/zero with RDONLY
>> >but then tries to mmap it PROT_READ+PROT_WRITE and gets rejected.
>> 
>> Sounds like missing MAP_PRIVATE ?
>
>Nope, private is set.  It's just that the file is opened RDONLY,
>but PROT has PROT_WRITE in it.

That should be OK with MAP_PRIVATE as far as I interpret POLA.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.