How do I retrieve the path to my dylib at runtime?

Question

On OS X, how can code in a dylib find the path it was loaded from, at runtime?

Coming from a Windows background, I'm used being able to call GetModuleFileName(dllHandle,...).

There exists NSGetExecutablePath() which will give me the path of the executable for the current process. Is there an equivalent to give me the current dylib path?

+1 for mentioning NSGetExecutablePath, the solution to the problem that brought me to this page. — Cory Trese, May 23 '14 at 00:22

score 17 · Accepted Answer · answered Sep 29 '11 at 16:10

Use dladdr(3). Given a memory address, dladdr() outputs a structure that has, amongst other data, the path of the library containing the address. For example, inside your library:

#include <stdio.h>
#include <dlfcn.h>

void test(void) {
    Dl_info info;
    if (dladdr(test, &info)) {
        printf("Loaded from path = %s\n", info.dli_fname);
    }
}

How do I retrieve the path to my dylib at runtime?

1 Answers1