1: #include <dlfcn.h>
    2: #include <error.h>
    3: #include <mcheck.h>
    4: #include <stdio.h>
    5: #include <stdlib.h>
    6: 
    7: int
    8: main (void)
    9: {
   10:   void *su[5];
   11:   void *h;
   12:   int n;
   13: 
   14:   mtrace ();
   15: 
   16:   if ((su[0] = dlopen ("testobj1.so", RTLD_GLOBAL | RTLD_NOW)) == NULL
   17:       || (su[1] = dlopen ("testobj2.so", RTLD_GLOBAL | RTLD_NOW)) == NULL
   18:       || (su[2] = dlopen ("testobj3.so", RTLD_GLOBAL | RTLD_NOW)) == NULL
   19:       || (su[3] = dlopen ("testobj4.so", RTLD_GLOBAL | RTLD_NOW)) == NULL
   20:       || (su[4] = dlopen ("testobj5.so", RTLD_GLOBAL | RTLD_NOW)) == NULL)
   21:     error (EXIT_FAILURE, 0, "failed to load shared object: %s", dlerror ());
   22: 
   23:   h = dlopen ("failobj.so", RTLD_GLOBAL | RTLD_NOW);
   24: 
   25:   printf ("h = %p, %s\n", h, h == NULL ? "ok" : "fail");
   26: 
   27:   for (n = 0; n < 5; ++n)
   28:     if (dlclose (su[n]) != 0)
   29:       {
   30:         printf ("failed to unload su[%d]: %s\n", n, dlerror ());
   31:         exit (EXIT_FAILURE);
   32:       }
   33: 
   34:   return h != NULL;
   35: }
   36: 
   37: extern int foo (int a);
   38: int
   39: foo (int a)
   40: {
   41:   return 10;
   42: }