- if (argc % 2 == 0 || argc < 2) {
- fprintf(stderr, "Usage: %s <peer_ip1> <peer_port1> "
- "<pper_ip2> <peer_port2> ...\n", argv[0]);
+ if (argc % 2 || argc < 3) {
+ fprintf(stderr, "Usage: %s <file> <peer_ip1> <peer_port1> "
+ "[<pper_ip2> <peer_port2> ...]\n", argv[0]);