check permissions of directories in python

hi i want a python program that given a directory, it will return all directories within that directory that have 775 (rwxrwxr-x) permissions

thanks!

From stackoverflow

• Does it have to be python?

  You can also use find to do that :

  "find . -perm 775"

• Take a look at the os module. In particular os.stat to look at the permission bits.

  import  os
  
  for filename in os.listdir(dirname):
     path=os.path.join(dirname, filename)
     if os.path.isdir(path):
         if (os.stat(path).st_mode & 0777) == 0775:
             print path
  

  nosklo : You could make it more compact and still readable using "if os.path.isdir(path) and (os.stat(path).st_mode & 0777) == 0775:" instead of two ifs.

• Neither answer recurses, though it's not entirely clear that that's what the OP wants. Here's a recursive approach (untested, but you get the idea):

  import os
  import stat
  import sys
  
  MODE = "775"
  
  def mode_matches(mode, file):
      """Return True if 'file' matches 'mode'.
  
      'mode' should be an integer representing an octal mode (eg
      int("755", 8) -> 493).
      """
      # Extract the permissions bits from the file's (or
      # directory's) stat info.
      filemode = stat.S_IMODE(os.stat(file).st_mode)
  
      return filemode == mode
  
  try:
      top = sys.argv[1]
  except IndexError:
      top = '.'
  
  try:
      mode = int(sys.argv[2], 8)
  except IndexError:
      mode = MODE
  
  # Convert mode to octal.
  mode = int(mode, 8)
  
  for dirpath, dirnames, filenames in os.walk(top):
      dirs = [os.path.join(dirpath, x) for x in dirnames]
      for dirname in dirs:
          if mode_matches(mode, dirname):
              print dirname
  

  Something similar is described in the stdlib documentation for stat.

  nosklo : good solution, you could use int(sys.argv[2], 8) to convert the user octal directly instead of doing it inside the function with the return from stat

  lt_kije : Ah -- indeed! I've updated my answer to convert the desired mode to octal instead of going the other way around for every discovered mode. Thanks!

• Compact generator based on Brian's answer:

  import os
  
  (fpath for fpath 
     in (os.path.join(dirname,fname) for fname in os.listdir(dirname)) 
     if (os.path.isdir(fpath) and (os.stat(fpath).st_mode & 0777) == 0775))