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#!/usr/bin/python3
            
import sys
import os
import stat


def get_filename(path):
    return path.split(os.sep)[-1]


def display_file(path, level):
    st = os.stat(path)
    rights = ""
    if st.st_mode & stat.S_IFDIR:
        rights += "d"
    else:
        rights += "-"
    if st.st_mode & stat.S_IRUSR:
        rights += "r"
    else:
        rights += "-"
    if st.st_mode & stat.S_IWUSR:
        rights += "w"
    else:
        rights += "-"
    if st.st_mode & stat.S_IXUSR:
        rights += "x"
    else:
        rights += "-"

    size = st.st_size
    short_name = get_filename(path)

    print("%s %9d %s%s" % (rights, size, level, short_name))


def scan(path, level=""):
    display_file(path, level)
    try:
        files = os.listdir(path)
        for file in files:
            sub_path = path + os.sep + file
            if os.path.isdir(sub_path):
                scan(sub_path, level + "    ")
            else:
                display_file(sub_path, level + "    ")
    except OSError:
        print(level + "    Access is denied !!!")


if len(sys.argv) == 2:
    folder = sys.argv[1]
else:
    folder = os.getcwd()

folder = os.path.abspath(folder)
if not os.path.isdir(folder):
    print("Not a folder: " + folder)
    exit()

scan(folder)