#define _POSIX_SOURCE
#include <termios.h>
main()
{     int terminal, n;
     long speed;
     char buf[512];

     do {
              printf("\nEnter speed:  ");
              scanf("%ld", &speed);
              terminal = openport("/dev/atc1",speed);
              printf("Enter text (type <CR> to end input):\n");
              while ((n = read(0, buf, 512)) > 1)
                    write(terminal, buf, n);
              close(terminal);
      } while ( speed != 0 );
      terminal = openport("/dev/atc1", 19200);
      close(terminal);
}