sigalrm_handler
.sa_handler = sigalrm_handler,
TEST_ASSERT(signal(SIGALRM, sigalrm_handler) != SIG_ERR,
signal(SIGALRM, sigalrm_handler);
signal(SIGALRM, sigalrm_handler);
signal(SIGALRM, sigalrm_handler);
signal(SIGALRM, sigalrm_handler);
signal(SIGALRM, sigalrm_handler);