linux-kernel - Re: [PATCH 4/5] perf tools: Add support for exclusive option

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Message-ID: <87bnp2e1wa.fsf@sejong.aot.lge.com>
Date:	Fri, 24 Oct 2014 09:40:05 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Jiri Olsa <jolsa@...hat.com>, David Ahern <dsahern@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Hemant Kumar <hemant@...ux.vnet.ibm.com>
Subject: Re: [PATCH 4/5] perf tools: Add support for exclusive option

Hi Arnaldo,

On Thu, 23 Oct 2014 17:29:48 -0300, Arnaldo Carvalho de Melo wrote:
> Em Thu, Oct 23, 2014 at 02:05:08PM +0900, Masami Hiramatsu escreveu:
>> (2014/10/23 0:15), Namhyung Kim wrote:
>> > Some options cannot be used at the same time.  To handle such options
>> > add a new PARSE_OPT_EXCLUSIVE flag and show error message if more than
>> > one of them is used.
>> 
>> Looks useful for me :)
>> 
>> Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
>> 
>> I just have a comment below;
>> 
>> > @@ -360,19 +378,21 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
>> >  		}
>> >  
>> >  		if (arg[1] != '-') {
>> > -			ctx->opt = arg + 1;
>> > +			ctx->opt = ++arg;
>> >  			if (internal_help && *ctx->opt == 'h')
>> >  				return usage_with_options_internal(usagestr, options, 0);
>> >  			switch (parse_short_opt(ctx, options)) {
>> >  			case -1:
>> > -				return parse_options_usage(usagestr, options, arg + 1, 1);
>> > +				return parse_options_usage(usagestr, options, arg, 1);
>> >  			case -2:
>> >  				goto unknown;
>> > +			case -3:
>> > +				goto exclusive;
>> 
>> BTW, it may be a time to define return error codes.
>
> Yeah, this thing looks unnecessarily complicated :-\

OK, will do it as a separate patch later.

Thanks,
Namhyung
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