Date: Mon, 11 Oct 2004 11:56:18 +0200 (CEST)
From: Jirka Kosina <jikos@jikos.cz>
To: Aboo Valappil <aboo@ABOOSPLANET.com>
cc: Luke Kenneth Casson Leighton <lkcl@lkcl.net>,
       Fabiano Ramos <ramos_fabiano@yahoo.com.br>,
       linux-kernel@vger.kernel.org
Subject: RE: how do you call userspace syscalls (e.g. sys_rename) from inside
 kernel
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Message-ID: <Pine.LNX.4.58.0410111152020.9978@twin.jikos.cz>
References: <3D6FC8DFDDD0CE44A3BE652A27AD42A54569@naya.aboosplanet.com>
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On Mon, 11 Oct 2004, Aboo Valappil wrote:

> In the past I looked in to open, read and write a file from a kernel
> module.  But problem I faced using the kernel function was that it
> checks for the permissions of the file and path against the "current"
> process. For eg: open_namei() function ... My requirement was to open
> the file regardless of the permissions on the file and also not by
> modifying task_struct of the current process to change the permissions
> first ! I also wanted not associate the file with the current/any
> processes.  Any ideas on this ?

1) This is offtopic on LKML, kernelnewbies might be more apropriate list
2) look at set_fs() and filp_open() calls, they might be useful for you
3) Think twice if opening files from kernel is the thing you are willing 
to do

-- 
JiKos.

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