Determining Whether a Directory is Writeable

Question

What would be the best way in Python to determine whether a directory is writeable for the user executing the script? Since this will likely involve using the os module I sh

Answer 1

Check the mode bits:

def isWritable(name):
  uid = os.geteuid()
  gid = os.getegid()
  s = os.stat(dirname)
  mode = s[stat.ST_MODE]
  return (
     ((s[stat.ST_UID] == uid) and (mode & stat.S_IWUSR)) or
     ((s[stat.ST_GID] == gid) and (mode & stat.S_IWGRP)) or
     (mode & stat.S_IWOTH)
     )