/**
 * @file   readnmea.c
 * @author Yanik Cawidrone
 * @date   1st July 2017
 * @version 0.1
 * @brief  A Linux user space program that communicates with the fakenmea LKM. 
 * @see http://derekmolloy.ie/writing-a-linux-kernel-module-part-2-a-character-device/
 * @see https://github.com/derekmolloy/exploringBB.git
*/
#include<stdio.h>
#include<stdlib.h>
#include<errno.h>
#include<fcntl.h>
#include<string.h>
#include<unistd.h>
#include <time.h>

#define BUFFER_LENGTH 256
static char receive[BUFFER_LENGTH];

int main(){
  int ret, fd;
  char stringToSend[BUFFER_LENGTH];
  fd = open("/dev/nmea", O_RDONLY);             // Open the device with read/write access
  if (fd < 0){
    perror("Failed to open the device...");
    return errno;
  }
  ret = read(fd, receive, BUFFER_LENGTH);        // Read the response from the LKM
  if (ret < 0){
    perror("Failed to read the message from the device.");
    return errno;
  }
  printf("%s", receive);
  close(fd);
  return 0;
}