linux-kernel - [PATCH 04/10] perf tools: Document the fact that parse

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Date:	Wed, 16 Dec 2015 21:47:57 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	linux-kernel@...r.kernel.org, Josh Poimboeuf <jpoimboe@...hat.com>,
	Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 04/10] perf tools: Document the fact that parse_options*() may exit

From: Josh Poimboeuf <jpoimboe@...hat.com>

Generally, calling exit() from a library is bad practice.  Eventually
these functions might be redesigned so that they don't exit.  For now,
just document the fact that they do.

Signed-off-by: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Link: http://lkml.kernel.org/r/97b1af06cc3b18dd0f49e655d6d659eaa64ecde5.1450193761.git.jpoimboe@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/parse-options.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/util/parse-options.h b/tools/perf/util/parse-options.h
index 1231960d6148..d1544069c7c0 100644
--- a/tools/perf/util/parse-options.h
+++ b/tools/perf/util/parse-options.h
@@ -152,6 +152,9 @@ struct option {
 /* parse_options() will filter out the processed options and leave the
  * non-option argments in argv[].
  * Returns the number of arguments left in argv[].
+ *
+ * NOTE: parse_options() and parse_options_subcommand() may call exit() in the
+ * case of an error (or for 'special' options like --list-cmds or --list-opts).
  */
 extern int parse_options(int argc, const char **argv,
                          const struct option *options,
-- 
2.1.0

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