#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>




int main(int argc, char *argv[])
{



   int flag = ( O_RDWR | O_NOCTTY | O_NDELAY );
   int handle = -1;
   char*  port = "/dev/ttyS0";

   printf("Attempting to open port \"%s\"\n", port);

   if( (handle = open(port, flag)) == -1)
   {

      /*
        An error has occured in opening the port, log an error report
      */
      printf("ERROR: An error has occured during opening of comport.\n");
      printf(" Error number = [%d] => description: %s", errno, 
strerror(errno));

      exit(EXIT_FAILURE);
      return 0;

   }

   printf("Success occured during opening of comport.\n");
   close(handle);

   exit(EXIT_SUCCESS);
   return 1;
}