c/cshell/cshell.c

   1 #include <stdio.h>
   2 #include <dlfcn.h>
   3
   4 typedef int (*func)(int, int);
   5 func add, sub, mul, div;
   6
   7 int main()
   8 {
   9         int a = 5, b = 4;
  10         void *arithHandle = NULL;
  11
  12         arithHandle = dlopen("libarithmetic.so", RTLD_NOW);
  13         if ( NULL == arithHandle )
  14         {
  15                 printf("Arithmetic library cant be opened\n");
  16         }
  17
  18         add = (func) dlsym (arithHandle, "add");
  19         sub = (func) dlsym (arithHandle, "sub");
  20         mul = (func) dlsym (arithHandle, "mul");
  21         div = (func) dlsym (arithHandle, "div");
  22
  23         printf("Add :: %d\n", add(a, b));
  24         printf("Sub :: %d\n", sub(a, b));
  25         printf("Mul :: %d\n", mul(a, b));
  26         printf("Div :: %d\n", div(a, b));
  27
  28         dlclose(arithHandle); //Its important to call dlclose() when you are done
  29         return 0;
  30 }