linux-kernel - Re: how to know list of files accessed

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Message-ID: <4F3902F8.3090905@free-electrons.com>
Date:	Mon, 13 Feb 2012 13:32:56 +0100
From:	Michael Opdenacker <michael.opdenacker@...e-electrons.com>
To:	ranjith kumar <ranjithproxy@...il.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: how to know list of files accessed

Hi Ranjith,

On 02/13/2012 12:30 PM, ranjith kumar wrote:
> Hi,
> Suppose I downloaded linux kernel.
> When I run "make", many of the .c files will be compiled.
> I want to know which .c files are compiles and which .c files are not compiled.
> Is there any way to know in linux?
An easy way is to run your command with 'strace' to trap all the calls
to 'open':

strace make 2>&1 | grep open
>
> Access time of the files which are compiled is not getting modified
> when I run "make" . why?
That's correct. As long as you don't read these files, there's no reason
to update their latest access time. Comparing access time with modified
time is a useful way to know which files haven't been read after being
modified.

Cheers

Michael.
-- 
Michael Opdenacker, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
+33 484 253 396

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