如何获得C ++自己的目录？

Question

I have a c++ .so file, so I called this from python. I wanna get .so file own location from c++ code. I used getcwd and readlink. They returned python code running directory. Is there someone knows the issue? Please help me, thanks.

Ps my .so file location is: /home/user/cpp/test.so
my python code location is: /home/user/python/test.py
getcwd, readlink's output is : /home/user/python (i wanna get "/home/user/cpp")

Answer 1

In general, the easiest/most efficient way to find an executable's shared library dependencies - and their paths - is with the "ldd" command.

If you want to get this information programmatically, one possibility is dl_iterate_phdr

Another is to check /proc/--pid--/maps:

http://www.unix.com/programming/34498-how-view-loaded-shared-libraries-running-processes-linux.html