linux-kernel - [RFC] perf script: Completing error handling?

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Message-ID: <6ede4925-8461-466e-ae09-7016ed92d314@web.de>
Date: Wed, 17 Jul 2024 15:55:50 +0200
From: Markus Elfring <Markus.Elfring@....de>
To: linux-perf-users@...r.kernel.org, kernel-janitors@...r.kernel.org,
 Adrian Hunter <adrian.hunter@...el.com>,
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
 Arnaldo Carvalho de Melo <acme@...nel.org>, Ian Rogers <irogers@...gle.com>,
 Ingo Molnar <mingo@...hat.com>, Jiri Olsa <jolsa@...nel.org>,
 Kan Liang <kan.liang@...ux.intel.com>, Mark Rutland <mark.rutland@....com>,
 Namhyung Kim <namhyung@...nel.org>, Peter Zijlstra <peterz@...radead.org>
Cc: LKML <linux-kernel@...r.kernel.org>
Subject: [RFC] perf script: Completing error handling?

Hello,

I noticed that source code like “printed += fprintf(fp, …)” is used
in some function implementations.
https://elixir.bootlin.com/linux/v6.10/source/tools/perf/builtin-script.c#L697

I find that return values should be checked somehow at 63 places.

See also:
* https://cwe.mitre.org/data/definitions/252.html

* https://wiki.sei.cmu.edu/confluence/display/c/POS54-C.+Detect+and+handle+POSIX+library+errors

Regards,
Markus