#include "unp.h" main() { int tcpsock, udpsock; printf("stdin: %d\n", Isfdtype(STDIN_FILENO, S_IFSOCK)); printf("stdout: %d\n", Isfdtype(STDOUT_FILENO, S_IFSOCK)); printf("stderr: %d\n", Isfdtype(STDERR_FILENO, S_IFSOCK)); tcpsock = Socket(AF_INET, SOCK_STREAM, 0); printf("TCP socket: %d\n", Isfdtype(tcpsock, S_IFSOCK)); udpsock = Socket(AF_INET, SOCK_DGRAM, 0); printf("UDP socket: %d\n", Isfdtype(udpsock, S_IFSOCK)); exit(0); }