#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>

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


  char *line = NULL;
  size_t len;
  FILE *fp;
  
  if (argc != 2) {
    fprintf (stderr, "Exactly one argument required, namely the filename \n");
    exit (1);
  }
        
  fp = fopen (argv[1], "r");
  if (fp == NULL) {
    fprintf (stderr, "%s: Couldn't open file %s!\n", argv[0], argv[1]);
    exit (1);
  }

  while (getline (&line, &len, fp) != -1) {
    printf ("The next line is %s", line);
    free (line);
    line = NULL;
  }

  exit (0);
}