elf/reldepmod4.c

   1 #include <dlfcn.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4
   5 extern int call_me (void);
   6
   7 int
   8 call_me (void)
   9 {
  10   void *h;
  11   int (*fp) (void);
  12   int res;
  13
  14   h = dlopen ("reldepmod1.so", RTLD_LAZY);
  15   if (h == NULL)
  16     {
  17       printf ("cannot open reldepmod1.so in %s: %s\n", __FILE__, dlerror ());
  18       exit (1);
  19     }
  20
  21   fp = dlsym (h, "foo");
  22   if (fp == NULL)
  23     {
  24       printf ("cannot get address of foo in global scope: %s\n", dlerror ());
  25       exit (1);
  26     }
  27
  28   res = fp () - 42;
  29
  30   if (dlclose (h) != 0)
  31     {
  32       printf ("failure when closing h in %s: %s\n", __FILE__, dlerror ());
  33       exit (1);
  34     }
  35
  36   return res;
  37 }