void ClientEcho(FILE * filein, int socket) { char sendbuff[MAXLINE+1], recvbuff[MAXLINE+1]; int nread, nwrite; int maxfd; fd_set fset; /* initialize file descriptor set */ FD_ZERO(&fset); maxfd = max(fileno(filein), socket) + 1; while (1) { FD_SET(socket, &fset); /* set for the socket */ FD_SET(fileno(filein), &fset); /* set for the standard input */ select(maxfd, &fset, NULL, NULL, NULL); /* wait for read ready */ if (FD_ISSET(fileno(filein), &fset)) { /* if ready on stdin */ if (fgets(sendbuff, MAXLINE, filein) == NULL) { /* if no input */ return; /* we stopped client */ } else { /* else we have to write to socket */ nwrite = FullWrite(socket, sendbuff, strlen(sendbuff)); if (nwrite < 0) { /* on error stop */ printf("Errore in scrittura: %s", strerror(errno)); return; } } } if (FD_ISSET(socket, &fset)) { /* if ready on socket */ nread = read(socket, recvbuff, strlen(sendbuff)); /* do read */ if (nread < 0) { /* error condition, stop client */ printf("Errore in lettura: %s\n", strerror(errno)); return; } if (nread == 0) { /* server closed connection, stop */ printf("EOF sul socket\n"); return; } recvbuff[nread] = 0; /* else read is ok, write on stdout */ if (fputs(recvbuff, stdout) == EOF) { perror("Errore in scrittura su terminale"); return; } } } }