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

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Date:	Thu, 23 Oct 2014 14:05:08 +0900
From:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	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

(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.

Thank you,


-- 
Masami HIRAMATSU
Software Platform Research Dept. Linux Technology Research Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu.pt@...achi.com


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