elf/noload.c

   1 #include <dlfcn.h>
   2 #include <stdio.h>
   3
   4 int
   5 main (void)
   6 {
   7   int result = 0;
   8
   9   /* First try to load an object which is a dependency.  This should
  10      succeed.  */
  11   if (dlopen ("testobj1.so", RTLD_LAZY | RTLD_NOLOAD) == NULL)
  12     {
  13       printf ("cannot open \"testobj1.so\": %s\n", dlerror ());
  14       result = 1;
  15     }
  16   else
  17     puts ("loading \"testobj1.so\" succeeded, OK");
  18
  19   /* Now try loading an object which is not already loaded.  */
  20   if (dlopen ("testobj5.so", RTLD_LAZY | RTLD_NOLOAD) != NULL)
  21     {
  22       puts ("succeeded in loading \"testobj5.so\"");
  23       result = 1;
  24     }
  25   else
  26     {
  27       /* Load the object and run the same test again.  */
  28       void *p;
  29
  30       puts ("\"testobj5.so\" wasn't loaded and RTLD_NOLOAD prevented it, OK");
  31
  32       p = dlopen ("testobj5.so", RTLD_LAZY);
  33
  34       if (p == NULL)
  35         {
  36           printf ("cannot open \"testobj5.so\" without RTLD_NOLOAD: %s\n",
  37                   dlerror ());
  38           result = 1;
  39         }
  40       else
  41         {
  42           puts ("loading \"testobj5.so\" succeeded, OK");
  43
  44           if (dlopen ("testobj5.so", RTLD_LAZY | RTLD_NOLOAD) == NULL)
  45             {
  46               printf ("cannot open \"testobj5.so\": %s\n", dlerror ());
  47               result = 1;
  48             }
  49           else
  50             puts ("loading \"testobj5.so\" with RTLD_NOLOAD succeeded, OK");
  51
  52           if (dlclose (p) != 0)
  53             {
  54               printf ("cannot close \"testobj5.so\": %s\n", dlerror ());
  55               result = 1;
  56             }
  57           else
  58             puts ("closing \"testobj5.so\" succeeded, OK");
  59         }
  60     }
  61
  62   return result;
  63 }
  64
  65
  66 extern int foo (int a);
  67 int
  68 foo (int a)
  69 {
  70   return 42 + a;
  71 }