Get filepath of library

Question

I am building a library for the Libretro framework, and I want to get the path of my library so that I can open a file in the same directory as my library.so file.

I followed the instructions at How to implement readlink to find the path, but that just gives me the path of the executable that is calling my library.

Peter · Answer 1 · 2019-01-30T17:32:10.620

2

On Linux, use the Glibc extension dladdr().

#include <dlfcn.h>

std::string get_library_path() {
    Dl_info dl_info;
    if(0 != dladdr((void*)get_library_path, &dl_info))
        return std::string(dl_info.dli_fname);
    else
        return std::string();
}

On Windows, the equivalent is GetModuleFileName()

edited Jan 30 '19 at 17:32

answered Jan 30 '19 at 15:39

Peter

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This gives me an empty string. – Morgoth Jan 30 '19 at 16:32
Sorry. `dladdr()` returns 0 on error, and nonzero on success. Grr. Editing the code sample to reverse the error check. – Peter Jan 30 '19 at 17:31

Get filepath of library

1 Answers1