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Date: Tue, 22 Jul 2014 21:09:01 +0200
From: Jiri Olsa <jolsa@redhat.com>
To: Adrian Hunter <adrian.hunter@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>, linux-kernel@vger.kernel.org,
        David Ahern <dsahern@gmail.com>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        Namhyung Kim <namhyung@gmail.com>, Paul Mackerras <paulus@samba.org>,
        Stephane Eranian <eranian@google.com>
Subject: Re: [PATCH 13/52] perf tools: Add perf_pmu__scan_file()
Message-ID: <20140722190901.GC29750@krava.redhat.com>
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 <1406035081-14301-14-git-send-email-adrian.hunter@intel.com>
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On Tue, Jul 22, 2014 at 04:17:22PM +0300, Adrian Hunter wrote:

SNIP

> +
> +static FILE *perf_pmu__open_file(struct perf_pmu *pmu, const char *name)
> +{
> +	struct stat st;
> +	char path[PATH_MAX];
> +	const char *sysfs;
> +
> +	sysfs = sysfs__mountpoint();
> +	if (!sysfs)
> +		return NULL;
> +
> +	snprintf(path, PATH_MAX,
> +		 "%s" EVENT_SOURCE_DEVICE_PATH "%s/%s", sysfs, pmu->name, name);
> +
> +	if (stat(path, &st) < 0)
> +		return NULL;
> +
> +	return fopen(path, "r");
> +}

looks like this function could be used in pmu_cpumask and pmu_type
and maybe others

jirka