#include <stdio.h>#include <stdlib.h> #include <unistd.h> #include <sys/types.h>  #include <sys/stat.h>   #include <fcntl.h>  #include <termios.h>#include <errno.h>void set_speed(int fd, int speed);int set_Parity(int fd,int databits,int stopbits,int parity);