19 # Extract bits from the mode
21 def S_IMODE(mode):  argument
22     """Return the portion of the file's mode that can be set by
25     return mode & 0o7777
27 def S_IFMT(mode):  argument
28     """Return the portion of the file's mode that describes the
31     return mode & 0o170000
50 def S_ISDIR(mode):  argument
51     """Return True if mode is from a directory."""
52     return S_IFMT(mode) == S_IFDIR
54 def S_ISCHR(mode):  argument
55     """Return True if mode is from a character special device file."""
56     return S_IFMT(mode) == S_IFCHR
58 def S_ISBLK(mode):  argument
59     """Return True if mode is from a block special device file."""
60     return S_IFMT(mode) == S_IFBLK
62 def S_ISREG(mode):  argument
63     """Return True if mode is from a regular file."""
64     return S_IFMT(mode) == S_IFREG
66 def S_ISFIFO(mode):  argument
67     """Return True if mode is from a FIFO (named pipe)."""
68     return S_IFMT(mode) == S_IFIFO
70 def S_ISLNK(mode):  argument
71     """Return True if mode is from a symbolic link."""
72     return S_IFMT(mode) == S_IFLNK
74 def S_ISSOCK(mode):  argument
75     """Return True if mode is from a socket."""
76     return S_IFMT(mode) == S_IFSOCK
78 def S_ISDOOR(mode):  argument
79     """Return True if mode is from a door."""
82 def S_ISPORT(mode):  argument
83     """Return True if mode is from an event port."""
86 def S_ISWHT(mode):  argument
87     """Return True if mode is from a whiteout."""
156 def filemode(mode):  argument
157     """Convert a file's mode to a string of the form '-rwxrwxrwx'."""
161             if mode & bit == bit: