|
|
# osutil.py - pure Python version of osutil.c
|
|
|
#
|
|
|
# Copyright 2009 Matt Mackall <mpm@selenic.com> and others
|
|
|
#
|
|
|
# This software may be used and distributed according to the terms of the
|
|
|
# GNU General Public License version 2 or any later version.
|
|
|
|
|
|
import os
|
|
|
import stat as statmod
|
|
|
|
|
|
def _mode_to_kind(mode):
|
|
|
if statmod.S_ISREG(mode):
|
|
|
return statmod.S_IFREG
|
|
|
if statmod.S_ISDIR(mode):
|
|
|
return statmod.S_IFDIR
|
|
|
if statmod.S_ISLNK(mode):
|
|
|
return statmod.S_IFLNK
|
|
|
if statmod.S_ISBLK(mode):
|
|
|
return statmod.S_IFBLK
|
|
|
if statmod.S_ISCHR(mode):
|
|
|
return statmod.S_IFCHR
|
|
|
if statmod.S_ISFIFO(mode):
|
|
|
return statmod.S_IFIFO
|
|
|
if statmod.S_ISSOCK(mode):
|
|
|
return statmod.S_IFSOCK
|
|
|
return mode
|
|
|
|
|
|
def listdir(path, stat=False, skip=None):
|
|
|
'''listdir(path, stat=False) -> list_of_tuples
|
|
|
|
|
|
Return a sorted list containing information about the entries
|
|
|
in the directory.
|
|
|
|
|
|
If stat is True, each element is a 3-tuple:
|
|
|
|
|
|
(name, type, stat object)
|
|
|
|
|
|
Otherwise, each element is a 2-tuple:
|
|
|
|
|
|
(name, type)
|
|
|
'''
|
|
|
result = []
|
|
|
prefix = path
|
|
|
if not prefix.endswith(os.sep):
|
|
|
prefix += os.sep
|
|
|
names = os.listdir(path)
|
|
|
names.sort()
|
|
|
for fn in names:
|
|
|
st = os.lstat(prefix + fn)
|
|
|
if fn == skip and statmod.S_ISDIR(st.st_mode):
|
|
|
return []
|
|
|
if stat:
|
|
|
result.append((fn, _mode_to_kind(st.st_mode), st))
|
|
|
else:
|
|
|
result.append((fn, _mode_to_kind(st.st_mode)))
|
|
|
return result
|
|
|
|
|
|
if os.name != 'nt':
|
|
|
posixfile = open
|
|
|
else:
|
|
|
import ctypes, msvcrt
|
|
|
|
|
|
_kernel32 = ctypes.windll.kernel32
|
|
|
|
|
|
_DWORD = ctypes.c_ulong
|
|
|
_LPCSTR = _LPSTR = ctypes.c_char_p
|
|
|
_HANDLE = ctypes.c_void_p
|
|
|
|
|
|
_INVALID_HANDLE_VALUE = _HANDLE(-1).value
|
|
|
|
|
|
# CreateFile
|
|
|
_FILE_SHARE_READ = 0x00000001
|
|
|
_FILE_SHARE_WRITE = 0x00000002
|
|
|
_FILE_SHARE_DELETE = 0x00000004
|
|
|
|
|
|
_CREATE_ALWAYS = 2
|
|
|
_OPEN_EXISTING = 3
|
|
|
_OPEN_ALWAYS = 4
|
|
|
|
|
|
_GENERIC_READ = 0x80000000
|
|
|
_GENERIC_WRITE = 0x40000000
|
|
|
|
|
|
_FILE_ATTRIBUTE_NORMAL = 0x80
|
|
|
|
|
|
# open_osfhandle flags
|
|
|
_O_RDONLY = 0x0000
|
|
|
_O_RDWR = 0x0002
|
|
|
_O_APPEND = 0x0008
|
|
|
|
|
|
_O_TEXT = 0x4000
|
|
|
_O_BINARY = 0x8000
|
|
|
|
|
|
# types of parameters of C functions used (required by pypy)
|
|
|
|
|
|
_kernel32.CreateFileA.argtypes = [_LPCSTR, _DWORD, _DWORD, ctypes.c_void_p,
|
|
|
_DWORD, _DWORD, _HANDLE]
|
|
|
_kernel32.CreateFileA.restype = _HANDLE
|
|
|
|
|
|
def _raiseioerror(name):
|
|
|
err = ctypes.WinError()
|
|
|
raise IOError(err.errno, '%s: %s' % (name, err.strerror))
|
|
|
|
|
|
class posixfile(object):
|
|
|
'''a file object aiming for POSIX-like semantics
|
|
|
|
|
|
CPython's open() returns a file that was opened *without* setting the
|
|
|
_FILE_SHARE_DELETE flag, which causes rename and unlink to abort.
|
|
|
This even happens if any hardlinked copy of the file is in open state.
|
|
|
We set _FILE_SHARE_DELETE here, so files opened with posixfile can be
|
|
|
renamed and deleted while they are held open.
|
|
|
Note that if a file opened with posixfile is unlinked, the file
|
|
|
remains but cannot be opened again or be recreated under the same name,
|
|
|
until all reading processes have closed the file.'''
|
|
|
|
|
|
def __init__(self, name, mode='r', bufsize=-1):
|
|
|
if 'b' in mode:
|
|
|
flags = _O_BINARY
|
|
|
else:
|
|
|
flags = _O_TEXT
|
|
|
|
|
|
m0 = mode[0]
|
|
|
if m0 == 'r' and '+' not in mode:
|
|
|
flags |= _O_RDONLY
|
|
|
access = _GENERIC_READ
|
|
|
else:
|
|
|
# work around http://support.microsoft.com/kb/899149 and
|
|
|
# set _O_RDWR for 'w' and 'a', even if mode has no '+'
|
|
|
flags |= _O_RDWR
|
|
|
access = _GENERIC_READ | _GENERIC_WRITE
|
|
|
|
|
|
if m0 == 'r':
|
|
|
creation = _OPEN_EXISTING
|
|
|
elif m0 == 'w':
|
|
|
creation = _CREATE_ALWAYS
|
|
|
elif m0 == 'a':
|
|
|
creation = _OPEN_ALWAYS
|
|
|
flags |= _O_APPEND
|
|
|
else:
|
|
|
raise ValueError("invalid mode: %s" % mode)
|
|
|
|
|
|
fh = _kernel32.CreateFileA(name, access,
|
|
|
_FILE_SHARE_READ | _FILE_SHARE_WRITE | _FILE_SHARE_DELETE,
|
|
|
None, creation, _FILE_ATTRIBUTE_NORMAL, None)
|
|
|
if fh == _INVALID_HANDLE_VALUE:
|
|
|
_raiseioerror(name)
|
|
|
|
|
|
fd = msvcrt.open_osfhandle(fh, flags)
|
|
|
if fd == -1:
|
|
|
_kernel32.CloseHandle(fh)
|
|
|
_raiseioerror(name)
|
|
|
|
|
|
f = os.fdopen(fd, mode, bufsize)
|
|
|
# unfortunately, f.name is '<fdopen>' at this point -- so we store
|
|
|
# the name on this wrapper. We cannot just assign to f.name,
|
|
|
# because that attribute is read-only.
|
|
|
object.__setattr__(self, 'name', name)
|
|
|
object.__setattr__(self, '_file', f)
|
|
|
|
|
|
def __iter__(self):
|
|
|
return self._file
|
|
|
|
|
|
def __getattr__(self, name):
|
|
|
return getattr(self._file, name)
|
|
|
|
|
|
def __setattr__(self, name, value):
|
|
|
'''mimics the read-only attributes of Python file objects
|
|
|
by raising 'TypeError: readonly attribute' if someone tries:
|
|
|
f = posixfile('foo.txt')
|
|
|
f.name = 'bla' '''
|
|
|
return self._file.__setattr__(name, value)
|
|
|
|