// For RTLD_NEXT
#define _GNU_SOURCE

#include <stdio.h>
#include <dlfcn.h>
#include <stdlib.h>


static FILE *(*real_fopen)(const char *, const char *) = NULL;

FILE * fopen ( const char * filename, const char * mode ) {
  printf("HUEBR, GIBE DATA PLOS, OR I REPORT U HUEHUE\n");
  printf("MI NO LIK U FIL, MI UPEN HUE.TXT\n");

  return real_fopen("hue.txt", "w");
}

void __attribute__((constructor)) initialize(void) {
  real_fopen = dlsym(RTLD_NEXT, "fopen");

  if (real_fopen == NULL) {
    printf("What? We couldn't find our fopen!!!!\n");
    exit(255); // This will crash the program since it isn't expecting to exit in the constructor
  }
}