linux-kernel - Re: [PATCH v2] perf tools: avoid possible race condition in copyfile

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Date:	Mon, 8 Jun 2015 11:53:03 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Milos Vyletel <milos@...hat.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...hat.com>, Jiri Olsa <jolsa@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Don Zickus <dzickus@...hat.com>,
	"Steven Rostedt (Red Hat)" <rostedt@...dmis.org>,
	"open list:PERFORMANCE EVENT..." <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] perf tools: avoid possible race condition in copyfile

Em Mon, Jun 08, 2015 at 04:50:16PM +0200, Milos Vyletel escreveu:
> Use unique temporary files when copying to buildid dir to prevent races
> in case multiple instances are trying to copy same file. This is done by
> 
> - creating template in form <path>/.<filename>.XXXXXX where the suffix is
>   used by mkstemp() to create unique file
> - change file mode
> - copy content
> - if successful link temp file to target file
> - unlink temp file

Thanks, applied, will be in my next pull request to Ingo,

- Arnaldo
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