[LTP] [PATCH v2] Refactor pidns30 test using new LTP API

[Cyril Hrubis]

Hi!
> +static void child_signal_handler(LTP_ATTRIBUTE_UNUSED int sig, siginfo_t *si, LTP_ATTRIBUTE_UNUSED void *unused)
>  {
> -	char buf[256];
> -	struct mq_attr attr;
> -
> -	if (si->si_signo != SIGUSR1) {
> -		printf("received signal = %d unexpectedly\n", si->si_signo);
> +	if (si->si_signo != SIGUSR1 || si->si_code != SI_MESGQ || si->si_pid != 0)
>  		return;
> -	}
>  
> -	if (si->si_code != SI_MESGQ) {
> -		printf("expected signal code SI_MESGQ; got %d instead\n",
> -		       si->si_code);
> -		return;
> -	}
> -
> -	if (si->si_pid) {
> -		printf("expected signal originator PID = 0; got %d instead\n",
> -		       si->si_pid);
> -		return;
> -	} else {
> -		printf("signal originator PID = 0\n");
> -		result = TPASS;
> -	}
> -
> -	/*
> -	 * Now read the message - Be silent on errors since this is not the
> -	 * test purpose.
> -	 */
> -	rc = mq_getattr(si->si_int, &attr);
> -	if (rc != -1)
> -		mq_receive(si->si_int, buf, attr.mq_msgsize, NULL);
> +	received++;

I do not like that much that we lost most of the information about the
failure here. Can we store at least the si_signo and si_pid so that they
can be printed in the case of the failure?

> -int main(void)
> +static void run(void)
>  {
> -	int status;
> -	char buf[5];
> -	pid_t cpid;
> -
> -	setup();
> -
> -	if (pipe(child_to_father) == -1 || pipe(father_to_child) == -1) {
> -		tst_brkm(TBROK | TERRNO, cleanup, "pipe failed");
> -	}
> +	int ret;
>  
> -	tst_syscall(__NR_mq_unlink, mqname);
> +	remove_mqueue(mqd);
>  
> -	/* container creation on PID namespace */
> -	cpid = ltp_clone_quick(CLONE_NEWPID | SIGCHLD, child_fn, NULL);
> -	if (cpid == -1)
> -		tst_brkm(TBROK | TERRNO, cleanup, "clone failed");
> +	ret = ltp_clone_quick(CLONE_NEWPID | SIGCHLD, child_func, NULL);
> +	if (ret < 0)
> +		tst_brk(TBROK | TERRNO, "clone failed");
>  
> -	mqd =
> -	    tst_syscall(__NR_mq_open, mqname, O_RDWR | O_CREAT | O_EXCL, 0777,
> -		    NULL);
> +	mqd = mq_open(MQNAME, O_RDWR | O_CREAT | O_EXCL, 0777, 0);
>  	if (mqd == -1)
> -		tst_brkm(TBROK | TERRNO, cleanup, "mq_open failed");
> -	else
> -		tst_resm(TINFO, "successfully created posix mqueue");
> +		tst_brk(TBROK | TERRNO, "mq_open failed");

We allready have SAFE_MQ_OPEN() I guess that we may add the rest of the
SAFE_MQ_* calls as well and use them here.

-- 
Cyril Hrubis
chrubis@suse.cz