fork()                                  = -1 EAGAIN (Resource temporarily unavailable)
rt_sigprocmask(SIG_BLOCK, [CHLD], [RT_0], 8) = 0
rt_sigaction(SIGCHLD, NULL, {SIG_DFL}, 8) = 0
rt_sigprocmask(SIG_SETMASK, [RT_0], NULL, 8) = 0
nanosleep({5, 0}, {5, 0})               = 0