readdir_inodes.py

#!/usr/bin/env python3

from ctypes import *
libc = CDLL("libc.so.6")

class dirent(Structure):
    _fields_ = [
            ('d_ino', c_long),
            ('d_off', c_long),
            ('d_reclen', c_ushort),
            ('d_type', c_ubyte),
            ('d_name', c_char * 256)]


libc.opendir.restype = c_void_p
libc.opendir.argtypes = [c_char_p]

libc.readdir.restype = c_void_p
libc.readdir.argtypes = [c_void_p]

libc.closedir.restype = c_int
libc.closedir.argtypes = [c_void_p]

DIR = libc.opendir(b"/")
ent = libc.readdir(DIR)

content = {}
while(ent):
    u = cast(ent, POINTER(dirent))[0]
    content[u.d_name.decode('ascii')] = u.d_ino
    ent = libc.readdir(DIR)
libc.closedir(DIR)

print(content["."])
print(content[".."])