1  #include <dlfcn.h>
       2  #include <stdio.h>
       3  
       4  static const char obj[] = "testobj1.so";
       5  
       6  int
       7  main (void)
       8  {
       9    void *d = dlopen (obj, RTLD_LAZY);
      10    int n;
      11  
      12    if (d == NULL)
      13      {
      14        printf ("cannot load %s: %s\n", obj, dlerror ());
      15        return 1;
      16      }
      17  
      18    for (n = 0; n < 10000; ++n)
      19      if (dlsym (d, "does not exist") != NULL)
      20        {
      21  	puts ("dlsym() did not fail");
      22  	return 1;
      23        }
      24      else if (dlerror () == NULL)
      25        {
      26  	puts ("dlerror() didn't return a string");
      27  	return 1;
      28        }
      29  
      30    return 0;
      31  }