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

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Message-ID: <8249.1329194664@turing-police.cc.vt.edu>
Date:	Mon, 13 Feb 2012 23:44:24 -0500
From:	Valdis.Kletnieks@...edu
To:	Michael Opdenacker <michael.opdenacker@...e-electrons.com>
Cc:	ranjith kumar <ranjithproxy@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: how to know list of files accessed

On Mon, 13 Feb 2012 13:32:56 +0100, Michael Opdenacker said:

> An easy way is to run your command with 'strace' to trap all the calls
> to 'open':
>
> strace make 2>&1 | grep open

You really want 'strace -f make' - the -f flag makes it follow forks, which you
want to do because it's gcc that's doing most of the actual file I/O, not make.

Oh.  and you want to redirect that grep into a temporary file and be
prepared to post-process it with perl or something, there's going to be
*zillions* of open() syscalls.

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