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comparison mercurial/win32.py @ 11992:ccd8e592c3c5 stable

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win32: remove useless lstat() fallback in nlinks() The fallback was introduced by 3b4f05ff3130 at the same time than nlinks(). Apparently it only handles the case where target path does not exist. Just raise IOError directly.
author Patrick Mezard <pmezard@gmail.com>
date Thu, 19 Aug 2010 22:51:09 +0200
parents 50523b4407f6
children 4f8067c94729
comparison
equal deleted inserted replaced
11991:50523b4407f6 11992:ccd8e592c3c5
32 """Return number of hardlinks for the given file.""" 32 """Return number of hardlinks for the given file."""
33 try: 33 try:
34 fh = win32file.CreateFile(pathname, 34 fh = win32file.CreateFile(pathname,
35 win32file.GENERIC_READ, win32file.FILE_SHARE_READ, 35 win32file.GENERIC_READ, win32file.FILE_SHARE_READ,
36 None, win32file.OPEN_EXISTING, 0, None) 36 None, win32file.OPEN_EXISTING, 0, None)
37 try:
38 return win32file.GetFileInformationByHandle(fh)
39 finally:
40 fh.Close()
41 except pywintypes.error: 37 except pywintypes.error:
42 return None 38 raise OSError(errno.ENOENT, 'The system cannot find the file specified')
39 try:
40 return win32file.GetFileInformationByHandle(fh)
41 finally:
42 fh.Close()
43 43
44 def nlinks(pathname): 44 def nlinks(pathname):
45 """Return number of hardlinks for the given file.""" 45 """Return number of hardlinks for the given file."""
46 res = _getfileinfo(pathname) 46 links = _getfileinfo(pathname)[7]
47 if res is not None:
48 links = res[7]
49 else:
50 links = os.lstat(pathname).st_nlink
51 if links < 2: 47 if links < 2:
52 # Known to be wrong for most network drives 48 # Known to be wrong for most network drives
53 dirname = os.path.dirname(pathname) 49 dirname = os.path.dirname(pathname)
54 if not dirname: 50 if not dirname:
55 dirname = '.' 51 dirname = '.'
62 def samefile(fpath1, fpath2): 58 def samefile(fpath1, fpath2):
63 """Returns whether fpath1 and fpath2 refer to the same file. This is only 59 """Returns whether fpath1 and fpath2 refer to the same file. This is only
64 guaranteed to work for files, not directories.""" 60 guaranteed to work for files, not directories."""
65 res1 = _getfileinfo(fpath1) 61 res1 = _getfileinfo(fpath1)
66 res2 = _getfileinfo(fpath2) 62 res2 = _getfileinfo(fpath2)
67 if res1 is not None and res2 is not None: 63 # Index 4 is the volume serial number, and 8 and 9 contain the file ID
68 # Index 4 is the volume serial number, and 8 and 9 contain the file ID 64 return res1[4] == res2[4] and res1[8] == res2[8] and res1[9] == res2[9]
69 return res1[4] == res2[4] and res1[8] == res2[8] and res1[9] == res2[9]
70 else:
71 return False
72 65
73 def samedevice(fpath1, fpath2): 66 def samedevice(fpath1, fpath2):
74 """Returns whether fpath1 and fpath2 are on the same device. This is only 67 """Returns whether fpath1 and fpath2 are on the same device. This is only
75 guaranteed to work for files, not directories.""" 68 guaranteed to work for files, not directories."""
76 res1 = _getfileinfo(fpath1) 69 res1 = _getfileinfo(fpath1)
77 res2 = _getfileinfo(fpath2) 70 res2 = _getfileinfo(fpath2)
78 if res1 is not None and res2 is not None: 71 return res1[4] == res2[4]
79 return res1[4] == res2[4]
80 else:
81 return False
82 72
83 def testpid(pid): 73 def testpid(pid):
84 '''return True if pid is still running or unable to 74 '''return True if pid is still running or unable to
85 determine, False otherwise''' 75 determine, False otherwise'''
86 try: 76 try: