[LTP] [PATCH v2 3/3] lib: Prefer LTP_DEBUG over -D

[Li Wang]

On Thu, Mar 26, 2026 at 06:04:35PM +0100, Petr Vorel wrote:
> Environment variable has usually higher preference than getopt.
> Also document it.
> 
> Fixes: e434de62b4 ("lib: Extend LTP_ENABLE_DEBUG to support verbosity levels")
> Signed-off-by: Petr Vorel <pvorel@suse.cz>

Reviewed-by: Li Wang <liwang@redhat.com>

> @@ -825,13 +825,15 @@ static void parse_opts(int argc, char *argv[])
>  			tst_brk(TBROK, "Invalid option");
>  		break;
>  		case 'D':
> -			if (optarg)
> -				context->tdebug = SAFE_STRTOL(optarg, 1, 2);
> -			else
> -				context->tdebug = 1;
> -
> -			if (context->tdebug)
> -				tst_res(TINFO, "Enabling debug info (level %d)", context->tdebug);
> +			if (!getenv("LTP_DEBUG")) {

My preference is to shorten the code indentation:

  case 'D':
      if (getenv("LTP_DEBUG"))
          break;
  
      context->tdebug = optarg ? SAFE_STRTOL(optarg, 1, 2) : 1;

      if (context->tdebug)
          tst_res(TINFO, "Enabling debug info (level %d)", context->tdebug);
  break;

> +				if (optarg)
> +					context->tdebug = SAFE_STRTOL(optarg, 1, 2);
> +				else
> +					context->tdebug = 1;
> +
> +				if (context->tdebug)
> +					tst_res(TINFO, "Enabling debug info (level %d)", context->tdebug);
> +			}
>  		break;
>  		case 'h':
>  			print_help();
> -- 
> 2.53.0
> 

-- 
Regards,
Li Wang