linux-kernel - Re: Intercepting system calls

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Message-ID: <CAOh0hwPeveaEaNv_mjNVLM36JSbObX4n5y1jC_Yp5MwdBA0Sxw@mail.gmail.com>
Date:	Fri, 23 Dec 2011 07:52:59 +0530
From:	Gaurav Saxena <grvsaxena419@...il.com>
To:	John Stoffel <john@...ffel.org>
Cc:	richard -rw- weinberger <richard.weinberger@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: Intercepting system calls

Hello John,

On Thu, Dec 22, 2011 at 11:22 PM, John Stoffel <john@...ffel.org> wrote:
>>>>>> "Gaurav" == Gaurav Saxena <grvsaxena419@...il.com> writes:
>
>>> Intercepting system calls is very bad, don't do it.
>
> Gaurav> Oh. I will not do it then, could you suggest me something so
> Gaurav> that I could prevent unlink on some file say using kernel
> Gaurav> support. I want to save file on unlink how could I do that
> Gaurav> without kernel support, or how could I do that using a kernel
> Gaurav> module.
>
> Write a FUSE module to mount the filesystem through, inside your FUSE
> module you can intercept the unlink/truncate/write calls and decide
> what you want to have happen.
>
> John
I would like to write it differently for each type of filesystem ?
Because what operations to call after my function depends on this.
Also Can I mount "/" in this way ?


-- 
Thanks and Regards ,
Gaurav
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