#include <dlfcn.h>

#include <errno.h>

#include <mcheck.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

int

main (void)

{

  void *a;

  void *b;

  void *c;

  void *d;

  char *wd;

  char *base;

  char *buf;

  mtrace ();

  /* Change to the binary directory.  */

  if (chdir (OBJDIR) != 0)

    {

      printf ("cannot change to `%s': %m", OBJDIR);

      exit (EXIT_FAILURE);

    }

  wd = getcwd (NULL, 0);

  base = basename (wd);

  buf = alloca (strlen (wd) + strlen (base) + 5 + sizeof "testobj1.so");

  printf ("loading `%s'\n", "./testobj1.so");

  a = dlopen ("./testobj1.so", RTLD_NOW);

  if (a == NULL)

    {

      printf ("cannot load `./testobj1.so': %s\n", dlerror ());

      exit (EXIT_FAILURE);

    }

  stpcpy (stpcpy (stpcpy (buf, "../"), base), "/testobj1.so");

  printf ("loading `%s'\n", buf);

  b = dlopen (buf, RTLD_NOW);

  if (b == NULL)

    {

      printf ("cannot load `%s': %s\n", buf, dlerror ());

      exit (EXIT_FAILURE);

    }

  stpcpy (stpcpy (buf, wd), "/testobj1.so");

  printf ("loading `%s'\n", buf);

  c = dlopen (buf, RTLD_NOW);

  if (c == NULL)

    {

      printf ("cannot load `%s': %s\n", buf, dlerror ());

      exit (EXIT_FAILURE);

    }

  stpcpy (stpcpy (stpcpy (stpcpy (buf, wd), "/../"), base), "/testobj1.so");

  printf ("loading `%s'\n", buf);

  d = dlopen (buf, RTLD_NOW);

  if (d == NULL)

    {

      printf ("cannot load `%s': %s\n", buf, dlerror ());

      exit (EXIT_FAILURE);

    }

  if (a != b || b != c || c != d)

    {

      puts ("shared object loaded more than once");

      exit (EXIT_FAILURE);

    }

  if (dlclose (a) != 0)

    {

      puts ("closing `a' failed");

      exit (EXIT_FAILURE);

    }

  if (dlclose (b) != 0)

    {

      puts ("closing `a' failed");

      exit (EXIT_FAILURE);

    }

  if (dlclose (c) != 0)

    {

      puts ("closing `a' failed");

      exit (EXIT_FAILURE);

    }

  if (dlclose (d) != 0)

    {

      puts ("closing `a' failed");

      exit (EXIT_FAILURE);

    }

  free (wd);

  return 0;

}

extern int foo (int a);

int

foo (int a)

{

  return a;

}