from __future__ import print_function
import os
import ctypes
import ctypes.util

libname = ctypes.util.find_library('c')
libc = ctypes.cdll.LoadLibrary(libname)

_getcwd = libc.getcwd
_getcwd.argtypes = (ctypes.c_char_p, ctypes.c_size_t)
_getcwd.restype = ctypes.c_char_p

_strlen = libc.strlen
_strlen.argtypes = (ctypes.c_char_p,)
_strlen.restype = ctypes.c_size_t

_buflen = 5000
_buffer = ctypes.create_string_buffer(_buflen)

start = os.getcwd()
subdirs = []
try:
    s = 'a' * 1
    while True:
        os.mkdir(s)
        subdirs.append(os.path.join(os.getcwd(), s))
        os.chdir(s)
#        ret = _getcwd(_buffer, _buflen)
#        if ret:
#            print("dirlen", _strlen(_buffer))
        cwd = os.getcwd()
        print("cwd:", len(cwd), "...%s" % cwd[-10:])

finally:
    os.chdir(start)
    for s in reversed(subdirs):
        os.chdir(os.path.dirname(s))
        os.rmdir(os.path.basename(s))