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perf tools: Show single option when failed to parse

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Current option parser outputs whole option help string when it failed to
parse an option.  However this is not good for user if the command has
many option, she might feel hard which one is related easily.

Fix it by just showing the help message of the given option only.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Requested-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Enthusiastically-Supported-by: Ingo Molnar <mingo@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1383291195-24386-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim
2013-11-01 16:33:11 +09:00
committed by Arnaldo Carvalho de Melo
parent 42d88910c7
commit ac69762550
2 changed files with 132 additions and 89 deletions
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4
tools/perf/util/parse-options.h
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@@ -158,7 +158,9 @@ struct parse_opt_ctx_t {
};
extern int parse_options_usage(const char * const *usagestr,
const struct option *opts);
const struct option *opts,
const char *optstr,
bool short_opt);
extern void parse_options_start(struct parse_opt_ctx_t *ctx,
int argc, const char **argv, int flags);