[LTP] [PATCH v1] Rewrite process_vm01 test using new LTP API

[Richard Palethorpe]

Hello,

Andrea Cervesato via ltp <ltp@lists.linux.it> writes:

> -static void cma_test_invalid_perm(void)
> +static void test_invalid_perm(void)
>  {
>  	char nobody_uid[] = "nobody";
>  	struct passwd *ltpuser;
> -	int status;
>  	struct process_vm_params *params;
>  	pid_t child_pid;
>  	pid_t parent_pid;
> -	int ret = 0;
> +	int status;
> +
> +	tst_res(TINFO, "Testing invalid permissions on given PID");
>  
> -	tst_resm(TINFO, "test_invalid_perm");
>  	parent_pid = getpid();
> -	child_pid = fork();
> -	switch (child_pid) {
> -	case -1:
> -		tst_brkm(TBROK | TERRNO, cleanup, "fork");
> -		break;
> -	case 0:
> -		ltpuser = getpwnam(nobody_uid);
> -		if (ltpuser == NULL)
> -			tst_brkm(TBROK | TERRNO, NULL, "getpwnam failed");
> -		SAFE_SETUID(NULL, ltpuser->pw_uid);
> -
> -		params = cma_alloc_sane_params();
> +	child_pid = SAFE_FORK();
> +	if (!child_pid) {
> +		ltpuser = SAFE_GETPWNAM(nobody_uid);
> +		SAFE_SETUID(ltpuser->pw_uid);
> +
> +		params = alloc_params();
>  		params->pid = parent_pid;
> -		cma_test_params(params);
> -		ret |= cma_check_ret(-1, TEST_RETURN);
> -		ret |= cma_check_errno(EPERM);
> -		cma_free_params(params);
> -		exit(ret);
> -	default:
> -		SAFE_WAITPID(cleanup, child_pid, &status, 0);
> -		if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
> -			tst_resm(TFAIL, "child returns %d", status);
> +		test_params(params);
> +		TST_EXP_EQ_LI(TST_RET, -1);
> +		check_errno(EPERM);
> +		free_params(params);
> +		return;
>  	}
> +
> +	SAFE_WAITPID(child_pid, &status, 0);

We want to use tst_reap_children() here which will check the exit
status.

In fact, if SAFE_WAITPID is removed altogether then the exit status will
be checked automatically at the end of the test when the lib calls
reap_children.

Otherwise LGTM!

-- 
Thank you,
Richard.