HP-UX Reference (11i v2 04/09) - 3 Library Functions A-M (vol 6)

dlsym(3C) dlsym(3C)

/* invoke function, passing value of integer as a parameter */

i = (*fptr)(*iptr);

The next example shows how one can use

dlsym with RTLD_NEXT to add functionality to an existing

interface. Again, error checking has been omitted.

extern void record_malloc(void *, size_t);

void *

malloc(size_t sz)

{

void *ptr;

void *(*real_malloc)(size_t);

real_malloc = (void * (*) (size_t))

dlsym(RTLD_NEXT, "malloc");

ptr = (*real_malloc)(sz);

record_malloc(ptr, sz);

return ptr;

}