[LTP] [PATCH 3/3 v2] getrusage: Cleanup and bugfix for getrusage03

[Cyril Hrubis <chrubis@suse.cz>]

Hi!
>  static void sig_ign(void)
>  {
> -	tst_resm(TINFO, "Testcase #06: SIG_IGN");
> -
> -	SAFE_GETRUSAGE(cleanup, RUSAGE_CHILDREN, &ru);
> -	tst_resm(TINFO, "initial.children = %ld", ru.ru_maxrss);
> -	signal(SIGCHLD, SIG_IGN);
> +	SAFE_SIGNAL(SIGCHLD, SIG_IGN);
> +	SAFE_GETRUSAGE(RUSAGE_CHILDREN, &ru);
>  	maxrss_init = ru.ru_maxrss;
> 
> -	switch (pid = fork()) {
> -	case -1:
> -		tst_brkm(TBROK, cleanup, "fork #6");
> -	case 0:
> -		retval = system("getrusage03_child -n 500");
> -		if ((WIFEXITED(retval) && WEXITSTATUS(retval) != 0))
> -			tst_brkm(TBROK | TERRNO, cleanup, "system");
> -		exit(0);
> -	default:
> -		break;
> -	}
> +	pid_t pid = SAFE_FORK();
> +
> +	if (!pid)
> +		SAFE_EXECLP("getrusage03_child", "getrusage03_child",
> +			    "consume", "500", NULL);
> 
> -	sleep(1);		/* children become zombie */
> -	SAFE_GETRUSAGE(cleanup, RUSAGE_CHILDREN, &ru);
> -	tst_resm(TINFO, "after_zombie.children = %ld", ru.ru_maxrss);
> +	TST_PROCESS_EXIT_WAIT(pid, 0);
> +	SAFE_GETRUSAGE(RUSAGE_CHILDREN, &ru);
>  	if (is_in_delta(ru.ru_maxrss - maxrss_init))
> -		tst_resm(TPASS, "initial.children ~= after_zombie.children");
> +		tst_res(TPASS, "initial.children ~= after_zombie.children");
>  	else
> -		tst_resm(TFAIL, "initial.children !~= after_zombie.children");
> -	signal(SIGCHLD, SIG_DFL);
> -}
> +		tst_res(TFAIL, "after_zombie.children = %li, expected %li",
> +			ru.ru_maxrss, maxrss_init);

I guess that these messages could be better, techincally it's not a
zombie but rather ignored child, so I would change this to:

"initial.children ~= ignored_child.children"

Other than this the rest is good.

Reviewed-by: Cyril Hrubis <chrubis@suse.cz>


Also if you agree I can fix the two minor issues in the patchset before
merge, no need to send v3.

-- 
Cyril Hrubis
chrubis@suse.cz