#include<termios.h>        /*POSIX terminal control definitions*/
#include<stdio.h>          /*standard input/output definitions*/
#include<stdlib.h>         
#include<unistd.h>         /*UNIX standard functions definitions*/
#include<fcntl.h>          /*File control definitions*/
#include<errno.h>          /*error numbre definitions*/
#include<string.h>         /*string functions definitions*/
#include<sys/signal.h>     /*available signals definitions*/
#include<sys/types.h>


#define BAUDRATE B4800
#define MODEMDEVICE "/dev/termios1"
#define ENDMINITERM 2 /* ctrl-b to quit miniterm */

#define _POSIX_SOURCE 1 /* POSIX compliant source */

#define FALSE 0
#define TRUE 1

void *hilo_1(void *arg);


void main (void)
{

struct termios oldtio,newtio,oldstdtio,newstdtio;

pthread_t th1;
pthread_attr_t attr;

 int fd, c;

/* 
Open modem device for reading and writing and not as controlling tty
because we don't want to get killed if linenoise sends CTRL-C.
*/
fd = open (MODEMDEVICE, O_RDWR | O_NOCTTY);
if (fd <0) 

perror(MODEMDEVICE); exit(-1); 

tcgetattr(fd,&oldtio); /* save current modem settings */

/* 
Set bps rate and hardware flow control and 8n1 (8bit,no parity,1 stopbit).
Also don't hangup automatically and ignore modem status.
Finally enable receiving characters.
*/
newtio.c_cflag = BAUDRATE | CS8 | CLOCAL | CREAD;

/*
Ignore bytes with parity errors and make terminal raw and dumb.
*/
newtio.c_iflag = IGNPAR;

/*
Raw output.
*/
newtio.c_oflag = 0;

/*
Don't echo characters because if you connect to a host it or your
modem will echo characters for you. Don't generate signals.
*/
newtio.c_lflag = 0;

/* blocking read until 1 char arrives */
newtio.c_cc[VMIN]=1;
newtio.c_cc[VTIME]=0;

/* now clean the modem line and activate the settings for modem */
tcflush(fd, TCIFLUSH);
tcsetattr(fd,TCSANOW,&newtio);


tcsetattr(1,TCSANOW,&newtio); /* stdout settings like modem settings */

/* next stop echo and buffering for stdin */
tcgetattr(0,&oldstdtio);
tcgetattr(0,&newstdtio); /* get working stdtio */
newstdtio.c_lflag &= ~(ICANON | ECHO);
tcsetattr(0,TCSANOW,&newstdtio);

/* terminal settings done, now handle in ouput */

 if(pthread_attr_init (&attr) == -1)
   perror("");
 if (pthread_create(&th1, &attr, hilo_1, NULL) == -1)
   perror ("");

while(TRUE)
{
     read(fd,&c,1);
     printf("%d", c);

}

}

 
 void *hilo_1 (void *arg)
 {

  int dato,fd1;

fd1 = open (MODEMDEVICE, O_RDWR | O_NOCTTY);
if (fd1 <0) 

perror(MODEMDEVICE); exit(-1); 


 while(TRUE)

   {
  printf(" Enter byte:" );
  
  dato=getchar();
  
  write(fd1,&dato,1);

   }

 }