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comparison mercurial/win32.py @ 10218:750b7a4f01f6 stable

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Add support for relinking on Windows. Test and minor code change by Patrick M?zard <pmezard@gmail.com>
author Siddharth Agarwal <sid.bugzilla@gmail.com>
date Fri, 08 Jan 2010 18:48:39 +0530
parents 061eeb602354
children 3b94120864fc
comparison
equal deleted inserted replaced
10217:2bbb4c8eb27e 10218:750b7a4f01f6
35 except pywintypes.error, details: 35 except pywintypes.error, details:
36 raise OSError(errno.EINVAL, 'target implements hardlinks improperly') 36 raise OSError(errno.EINVAL, 'target implements hardlinks improperly')
37 except NotImplementedError: # Another fake error win Win98 37 except NotImplementedError: # Another fake error win Win98
38 raise OSError(errno.EINVAL, 'Hardlinking not supported') 38 raise OSError(errno.EINVAL, 'Hardlinking not supported')
39 39
40 def nlinks(pathname): 40 def _getfileinfo(pathname):
41 """Return number of hardlinks for the given file.""" 41 """Return number of hardlinks for the given file."""
42 try: 42 try:
43 fh = win32file.CreateFile(pathname, 43 fh = win32file.CreateFile(pathname,
44 win32file.GENERIC_READ, win32file.FILE_SHARE_READ, 44 win32file.GENERIC_READ, win32file.FILE_SHARE_READ,
45 None, win32file.OPEN_EXISTING, 0, None) 45 None, win32file.OPEN_EXISTING, 0, None)
46 res = win32file.GetFileInformationByHandle(fh) 46 res = win32file.GetFileInformationByHandle(fh)
47 fh.Close() 47 fh.Close()
48 return res
49 except pywintypes.error:
50 return None
51
52 def nlinks(pathname):
53 """Return number of hardlinks for the given file."""
54 res = _getfileinfo(pathname)
55 if res is not None:
48 return res[7] 56 return res[7]
49 except pywintypes.error: 57 else:
50 return os.lstat(pathname).st_nlink 58 return os.lstat(pathname).st_nlink
59
60 def samefile(fpath1, fpath2):
61 """Returns whether fpath1 and fpath2 refer to the same file. This is only
62 guaranteed to work for files, not directories."""
63 res1 = _getfileinfo(fpath1)
64 res2 = _getfileinfo(fpath2)
65 if res1 is not None and res2 is not None:
66 # Index 4 is the volume serial number, and 8 and 9 contain the file ID
67 return res1[4] == res2[4] and res1[8] == res2[8] and res1[9] == res2[9]
68 else:
69 return False
70
71 def samedevice(fpath1, fpath2):
72 """Returns whether fpath1 and fpath2 are on the same device. This is only
73 guaranteed to work for files, not directories."""
74 res1 = _getfileinfo(fpath1)
75 res2 = _getfileinfo(fpath2)
76 if res1 is not None and res2 is not None:
77 return res1[4] == res2[4]
78 else:
79 return False
51 80
52 def testpid(pid): 81 def testpid(pid):
53 '''return True if pid is still running or unable to 82 '''return True if pid is still running or unable to
54 determine, False otherwise''' 83 determine, False otherwise'''
55 try: 84 try: