NPIPE
case NPIPE:
case NPIPE:
if (n2->type == NCMD || n2->type == NPIPE)
pipenode->type = NPIPE;
case NPIPE:
for (i = 0; i < NPIPE; i++) {
int fds[NPIPE][2];
i = random() % NPIPE;
for (i = 0; i < NPIPE; i++) {