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From: prj@po.cwru.edu (Paul Jarc)
Newsgroups: gmane.comp.sysutils.supervision.general,gmane.linux.kernel,gmane.text.xml.cocoon.user,gmane.comp.misc.pape.general
Subject: Re: a problem with linux 2.6.11 and sa
Date: Wed, 09 Mar 2005 18:28:35 -0500
Organization: What did you have in mind?  A short, blunt, human pyramid?
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"George Georgalis" <george@galis.org> wrote:
> It (Gerrit Pape's technique) very defiantly stopped working a few revs
> back (2.6.7?). I'm seeing a similar failed read from /dev/rtc and
> mplayer with 2.6.10, now too.

The /proc/kmsg problem happens because the kernel now checks for
permission at read() instead of open().  The /dev/rtc problem seems to
be a different beast.

> while read file; do mplayer $file ; done <mediafiles.txt
>
> Failed to open /dev/rtc: Permission denied
>
> for file in `cat mediafiles.txt`; do mplayer $file ; done
>
> works.

To simplify, what about these two:
mplayer foo.mpg
mplayer foo.mpg < mediafiles.txt

You might try strace'ing both cases and see how they compare.


paul