"""Constants/functions for interpreting results of os.stat() and os.lstat().

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Suggested usage: from stat import *

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"""

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# Indices for stat struct members in the tuple returned by os.stat()

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ST_MODE = 0

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ST_INO = 1

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ST_DEV = 2

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ST_NLINK = 3

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ST_UID = 4

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ST_GID = 5

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ST_SIZE = 6

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ST_ATIME = 7

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ST_MTIME = 8

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ST_CTIME = 9

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# Extract bits from the mode

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def S_IMODE(mode):

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"""Return the portion of the file's mode that can be set by

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os.chmod().

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"""

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return mode & 0o7777

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def S_IFMT(mode):

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"""Return the portion of the file's mode that describes the

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file type.

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"""

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return mode & 0o170000

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# Constants used as S_IFMT() for various file types

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# (not all are implemented on all systems)

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S_IFDIR = 0o040000 # directory

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S_IFCHR = 0o020000 # character device

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S_IFBLK = 0o060000 # block device

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S_IFREG = 0o100000 # regular file

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S_IFIFO = 0o010000 # fifo (named pipe)

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S_IFLNK = 0o120000 # symbolic link

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S_IFSOCK = 0o140000 # socket file

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# Functions to test for each file type

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def S_ISDIR(mode):

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"""Return True if mode is from a directory."""

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return S_IFMT(mode) == S_IFDIR

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def S_ISCHR(mode):

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"""Return True if mode is from a character special device file."""

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return S_IFMT(mode) == S_IFCHR

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def S_ISBLK(mode):

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"""Return True if mode is from a block special device file."""

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return S_IFMT(mode) == S_IFBLK

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def S_ISREG(mode):

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"""Return True if mode is from a regular file."""

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return S_IFMT(mode) == S_IFREG

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def S_ISFIFO(mode):

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"""Return True if mode is from a FIFO (named pipe)."""

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return S_IFMT(mode) == S_IFIFO

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def S_ISLNK(mode):

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"""Return True if mode is from a symbolic link."""

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return S_IFMT(mode) == S_IFLNK

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def S_ISSOCK(mode):

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"""Return True if mode is from a socket."""

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return S_IFMT(mode) == S_IFSOCK

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# Names for permission bits

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S_ISUID = 0o4000 # set UID bit

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S_ISGID = 0o2000 # set GID bit

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S_ENFMT = S_ISGID # file locking enforcement

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S_ISVTX = 0o1000 # sticky bit

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S_IREAD = 0o0400 # Unix V7 synonym for S_IRUSR

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S_IWRITE = 0o0200 # Unix V7 synonym for S_IWUSR

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S_IEXEC = 0o0100 # Unix V7 synonym for S_IXUSR

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S_IRWXU = 0o0700 # mask for owner permissions

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S_IRUSR = 0o0400 # read by owner

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S_IWUSR = 0o0200 # write by owner

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S_IXUSR = 0o0100 # execute by owner

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S_IRWXG = 0o0070 # mask for group permissions

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S_IRGRP = 0o0040 # read by group

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S_IWGRP = 0o0020 # write by group

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S_IXGRP = 0o0010 # execute by group

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S_IRWXO = 0o0007 # mask for others (not in group) permissions

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S_IROTH = 0o0004 # read by others

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S_IWOTH = 0o0002 # write by others

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S_IXOTH = 0o0001 # execute by others

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# Names for file flags

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UF_NODUMP = 0x00000001 # do not dump file

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UF_IMMUTABLE = 0x00000002 # file may not be changed

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UF_APPEND = 0x00000004 # file may only be appended to

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UF_OPAQUE = 0x00000008 # directory is opaque when viewed through a union stack

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UF_NOUNLINK = 0x00000010 # file may not be renamed or deleted

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UF_COMPRESSED = 0x00000020 # OS X: file is hfs-compressed

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UF_HIDDEN = 0x00008000 # OS X: file should not be displayed

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SF_ARCHIVED = 0x00010000 # file may be archived

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SF_IMMUTABLE = 0x00020000 # file may not be changed

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SF_APPEND = 0x00040000 # file may only be appended to

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SF_NOUNLINK = 0x00100000 # file may not be renamed or deleted

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SF_SNAPSHOT = 0x00200000 # file is a snapshot file

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_filemode_table = (

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((S_IFLNK, "l"),

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(S_IFREG, "-"),

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(S_IFBLK, "b"),

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(S_IFDIR, "d"),

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(S_IFCHR, "c"),

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(S_IFIFO, "p")),

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((S_IRUSR, "r"),),

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((S_IWUSR, "w"),),

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((S_IXUSR|S_ISUID, "s"),

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(S_ISUID, "S"),

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(S_IXUSR, "x")),

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((S_IRGRP, "r"),),

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((S_IWGRP, "w"),),

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((S_IXGRP|S_ISGID, "s"),

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(S_ISGID, "S"),

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(S_IXGRP, "x")),

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((S_IROTH, "r"),),

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((S_IWOTH, "w"),),

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((S_IXOTH|S_ISVTX, "t"),

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(S_ISVTX, "T"),

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(S_IXOTH, "x"))

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)

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def filemode(mode):

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"""Convert a file's mode to a string of the form '-rwxrwxrwx'."""

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perm = []

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for table in _filemode_table:

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for bit, char in table:

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if mode & bit == bit:

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perm.append(char)

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break

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else:

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perm.append("-")

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return "".join(perm)

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# Windows FILE_ATTRIBUTE constants for interpreting os.stat()'s

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# "st_file_attributes" member

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FILE_ATTRIBUTE_ARCHIVE = 32

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FILE_ATTRIBUTE_COMPRESSED = 2048

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FILE_ATTRIBUTE_DEVICE = 64

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FILE_ATTRIBUTE_DIRECTORY = 16

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FILE_ATTRIBUTE_ENCRYPTED = 16384

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FILE_ATTRIBUTE_HIDDEN = 2

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FILE_ATTRIBUTE_INTEGRITY_STREAM = 32768

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FILE_ATTRIBUTE_NORMAL = 128

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FILE_ATTRIBUTE_NOT_CONTENT_INDEXED = 8192

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FILE_ATTRIBUTE_NO_SCRUB_DATA = 131072

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FILE_ATTRIBUTE_OFFLINE = 4096

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FILE_ATTRIBUTE_READONLY = 1

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FILE_ATTRIBUTE_REPARSE_POINT = 1024

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FILE_ATTRIBUTE_SPARSE_FILE = 512

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FILE_ATTRIBUTE_SYSTEM = 4

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FILE_ATTRIBUTE_TEMPORARY = 256

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FILE_ATTRIBUTE_VIRTUAL = 65536

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# If available, use C implementation

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try:

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from _stat import *

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except ImportError:

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pass

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