Mercurial > hg
annotate mercurial/win32.py @ 13884:773a833ddbc6
bugzilla: convert a verbatim block to a field list
author | Martin Geisler <mg@aragost.com> |
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date | Tue, 05 Apr 2011 10:22:58 +0200 |
parents | 43b5fe18ea6c |
children | 9ca1ff3d4f8c |
rev | line source |
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1 # win32.py - utility functions that use win32 API |
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2 # |
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3 # Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 import encoding |
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9 import ctypes, errno, os, struct, subprocess, random |
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10 |
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11 _kernel32 = ctypes.windll.kernel32 |
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12 |
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13 _BOOL = ctypes.c_long |
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14 _WORD = ctypes.c_ushort |
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15 _DWORD = ctypes.c_ulong |
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16 _LPCSTR = _LPSTR = ctypes.c_char_p |
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17 _HANDLE = ctypes.c_void_p |
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18 _HWND = _HANDLE |
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19 |
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20 _INVALID_HANDLE_VALUE = -1 |
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21 |
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22 # GetLastError |
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23 _ERROR_SUCCESS = 0 |
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24 _ERROR_INVALID_PARAMETER = 87 |
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25 _ERROR_INSUFFICIENT_BUFFER = 122 |
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26 |
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27 # WPARAM is defined as UINT_PTR (unsigned type) |
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28 # LPARAM is defined as LONG_PTR (signed type) |
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29 if ctypes.sizeof(ctypes.c_long) == ctypes.sizeof(ctypes.c_void_p): |
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30 _WPARAM = ctypes.c_ulong |
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31 _LPARAM = ctypes.c_long |
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32 elif ctypes.sizeof(ctypes.c_longlong) == ctypes.sizeof(ctypes.c_void_p): |
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33 _WPARAM = ctypes.c_ulonglong |
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34 _LPARAM = ctypes.c_longlong |
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35 |
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36 class _FILETIME(ctypes.Structure): |
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37 _fields_ = [('dwLowDateTime', _DWORD), |
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38 ('dwHighDateTime', _DWORD)] |
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39 |
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40 class _BY_HANDLE_FILE_INFORMATION(ctypes.Structure): |
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41 _fields_ = [('dwFileAttributes', _DWORD), |
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42 ('ftCreationTime', _FILETIME), |
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43 ('ftLastAccessTime', _FILETIME), |
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44 ('ftLastWriteTime', _FILETIME), |
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45 ('dwVolumeSerialNumber', _DWORD), |
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46 ('nFileSizeHigh', _DWORD), |
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47 ('nFileSizeLow', _DWORD), |
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48 ('nNumberOfLinks', _DWORD), |
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49 ('nFileIndexHigh', _DWORD), |
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50 ('nFileIndexLow', _DWORD)] |
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51 |
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52 # CreateFile |
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53 _FILE_SHARE_READ = 0x00000001 |
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54 _FILE_SHARE_WRITE = 0x00000002 |
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55 _FILE_SHARE_DELETE = 0x00000004 |
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56 |
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57 _OPEN_EXISTING = 3 |
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58 |
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59 # SetFileAttributes |
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60 _FILE_ATTRIBUTE_NORMAL = 0x80 |
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61 _FILE_ATTRIBUTE_NOT_CONTENT_INDEXED = 0x2000 |
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62 |
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63 # Process Security and Access Rights |
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64 _PROCESS_QUERY_INFORMATION = 0x0400 |
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65 |
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66 # GetExitCodeProcess |
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67 _STILL_ACTIVE = 259 |
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68 |
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69 # registry |
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70 _HKEY_CURRENT_USER = 0x80000001L |
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71 _HKEY_LOCAL_MACHINE = 0x80000002L |
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72 _KEY_READ = 0x20019 |
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73 _REG_SZ = 1 |
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74 _REG_DWORD = 4 |
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75 |
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76 class _STARTUPINFO(ctypes.Structure): |
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77 _fields_ = [('cb', _DWORD), |
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78 ('lpReserved', _LPSTR), |
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79 ('lpDesktop', _LPSTR), |
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80 ('lpTitle', _LPSTR), |
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81 ('dwX', _DWORD), |
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82 ('dwY', _DWORD), |
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83 ('dwXSize', _DWORD), |
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84 ('dwYSize', _DWORD), |
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85 ('dwXCountChars', _DWORD), |
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86 ('dwYCountChars', _DWORD), |
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87 ('dwFillAttribute', _DWORD), |
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88 ('dwFlags', _DWORD), |
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89 ('wShowWindow', _WORD), |
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90 ('cbReserved2', _WORD), |
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91 ('lpReserved2', ctypes.c_char_p), |
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92 ('hStdInput', _HANDLE), |
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93 ('hStdOutput', _HANDLE), |
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94 ('hStdError', _HANDLE)] |
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95 |
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96 class _PROCESS_INFORMATION(ctypes.Structure): |
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97 _fields_ = [('hProcess', _HANDLE), |
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98 ('hThread', _HANDLE), |
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99 ('dwProcessId', _DWORD), |
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100 ('dwThreadId', _DWORD)] |
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101 |
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102 _DETACHED_PROCESS = 0x00000008 |
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103 _STARTF_USESHOWWINDOW = 0x00000001 |
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104 _SW_HIDE = 0 |
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105 |
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106 class _COORD(ctypes.Structure): |
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107 _fields_ = [('X', ctypes.c_short), |
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108 ('Y', ctypes.c_short)] |
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109 |
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110 class _SMALL_RECT(ctypes.Structure): |
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111 _fields_ = [('Left', ctypes.c_short), |
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112 ('Top', ctypes.c_short), |
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113 ('Right', ctypes.c_short), |
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114 ('Bottom', ctypes.c_short)] |
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115 |
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116 class _CONSOLE_SCREEN_BUFFER_INFO(ctypes.Structure): |
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117 _fields_ = [('dwSize', _COORD), |
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118 ('dwCursorPosition', _COORD), |
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119 ('wAttributes', _WORD), |
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120 ('srWindow', _SMALL_RECT), |
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121 ('dwMaximumWindowSize', _COORD)] |
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122 |
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123 _STD_ERROR_HANDLE = 0xfffffff4L # (DWORD)-12 |
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124 |
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125 def _raiseoserror(name): |
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126 err = ctypes.WinError() |
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127 raise OSError(err.errno, '%s: %s' % (name, err.strerror)) |
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128 |
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129 def _getfileinfo(name): |
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130 fh = _kernel32.CreateFileA(name, 0, |
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131 _FILE_SHARE_READ | _FILE_SHARE_WRITE | _FILE_SHARE_DELETE, |
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132 None, _OPEN_EXISTING, 0, None) |
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133 if fh == _INVALID_HANDLE_VALUE: |
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134 _raiseoserror(name) |
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135 try: |
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136 fi = _BY_HANDLE_FILE_INFORMATION() |
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137 if not _kernel32.GetFileInformationByHandle(fh, ctypes.byref(fi)): |
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138 _raiseoserror(name) |
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139 return fi |
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140 finally: |
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141 _kernel32.CloseHandle(fh) |
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142 |
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143 def os_link(src, dst): |
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144 if not _kernel32.CreateHardLinkA(dst, src, None): |
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145 _raiseoserror(src) |
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146 |
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147 def nlinks(name): |
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148 '''return number of hardlinks for the given file''' |
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149 return _getfileinfo(name).nNumberOfLinks |
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150 |
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151 def samefile(fpath1, fpath2): |
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152 '''Returns whether fpath1 and fpath2 refer to the same file. This is only |
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153 guaranteed to work for files, not directories.''' |
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154 res1 = _getfileinfo(fpath1) |
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155 res2 = _getfileinfo(fpath2) |
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156 return (res1.dwVolumeSerialNumber == res2.dwVolumeSerialNumber |
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157 and res1.nFileIndexHigh == res2.nFileIndexHigh |
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158 and res1.nFileIndexLow == res2.nFileIndexLow) |
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159 |
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160 def samedevice(fpath1, fpath2): |
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161 '''Returns whether fpath1 and fpath2 are on the same device. This is only |
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162 guaranteed to work for files, not directories.''' |
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163 res1 = _getfileinfo(fpath1) |
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164 res2 = _getfileinfo(fpath2) |
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165 return res1.dwVolumeSerialNumber == res2.dwVolumeSerialNumber |
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166 |
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167 def testpid(pid): |
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168 '''return True if pid is still running or unable to |
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169 determine, False otherwise''' |
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170 h = _kernel32.OpenProcess(_PROCESS_QUERY_INFORMATION, False, pid) |
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171 if h: |
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172 try: |
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173 status = _DWORD() |
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174 if _kernel32.GetExitCodeProcess(h, ctypes.byref(status)): |
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175 return status.value == _STILL_ACTIVE |
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176 finally: |
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177 _kernel32.CloseHandle(h) |
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178 return _kernel32.GetLastError() != _ERROR_INVALID_PARAMETER |
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179 |
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180 def lookup_reg(key, valname=None, scope=None): |
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181 ''' Look up a key/value name in the Windows registry. |
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182 |
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183 valname: value name. If unspecified, the default value for the key |
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184 is used. |
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185 scope: optionally specify scope for registry lookup, this can be |
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186 a sequence of scopes to look up in order. Default (CURRENT_USER, |
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187 LOCAL_MACHINE). |
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188 ''' |
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189 adv = ctypes.windll.advapi32 |
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190 byref = ctypes.byref |
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191 if scope is None: |
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192 scope = (_HKEY_CURRENT_USER, _HKEY_LOCAL_MACHINE) |
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193 elif not isinstance(scope, (list, tuple)): |
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194 scope = (scope,) |
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195 for s in scope: |
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196 kh = _HANDLE() |
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197 res = adv.RegOpenKeyExA(s, key, 0, _KEY_READ, ctypes.byref(kh)) |
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198 if res != _ERROR_SUCCESS: |
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199 continue |
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200 try: |
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201 size = _DWORD(600) |
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202 type = _DWORD() |
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203 buf = ctypes.create_string_buffer(size.value + 1) |
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204 res = adv.RegQueryValueExA(kh.value, valname, None, |
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205 byref(type), buf, byref(size)) |
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206 if res != _ERROR_SUCCESS: |
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207 continue |
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208 if type.value == _REG_SZ: |
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209 # never let a Unicode string escape into the wild |
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210 return encoding.tolocal(buf.value.encode('UTF-8')) |
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211 elif type.value == _REG_DWORD: |
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212 fmt = '<L' |
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213 s = ctypes.string_at(byref(buf), struct.calcsize(fmt)) |
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214 return struct.unpack(fmt, s)[0] |
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215 finally: |
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216 adv.RegCloseKey(kh.value) |
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217 |
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218 def executable_path(): |
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219 '''return full path of hg.exe''' |
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220 size = 600 |
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221 buf = ctypes.create_string_buffer(size + 1) |
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222 len = _kernel32.GetModuleFileNameA(None, ctypes.byref(buf), size) |
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223 if len == 0: |
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224 raise ctypes.WinError() |
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225 elif len == size: |
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226 raise ctypes.WinError(_ERROR_INSUFFICIENT_BUFFER) |
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227 return buf.value |
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228 |
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229 def getuser(): |
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230 '''return name of current user''' |
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231 adv = ctypes.windll.advapi32 |
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232 size = _DWORD(300) |
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233 buf = ctypes.create_string_buffer(size.value + 1) |
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234 if not adv.GetUserNameA(ctypes.byref(buf), ctypes.byref(size)): |
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235 raise ctypes.WinError() |
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236 return buf.value |
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Handle CTRL+C in serve under Windows.
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237 |
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238 _SIGNAL_HANDLER = ctypes.WINFUNCTYPE(_BOOL, _DWORD) |
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239 _signal_handler = [] |
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240 |
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241 def set_signal_handler(): |
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242 '''Register a termination handler for console events including |
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243 CTRL+C. python signal handlers do not work well with socket |
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244 operations. |
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245 ''' |
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246 def handler(event): |
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247 _kernel32.ExitProcess(1) |
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248 |
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249 if _signal_handler: |
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250 return # already registered |
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251 h = _SIGNAL_HANDLER(handler) |
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252 _signal_handler.append(h) # needed to prevent garbage collection |
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253 if not _kernel32.SetConsoleCtrlHandler(h, True): |
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254 raise ctypes.WinError() |
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255 |
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256 _WNDENUMPROC = ctypes.WINFUNCTYPE(_BOOL, _HWND, _LPARAM) |
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257 |
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258 def hidewindow(): |
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259 user32 = ctypes.windll.user32 |
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260 |
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261 def callback(hwnd, pid): |
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262 wpid = _DWORD() |
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263 user32.GetWindowThreadProcessId(hwnd, ctypes.byref(wpid)) |
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264 if pid == wpid.value: |
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265 user32.ShowWindow(hwnd, _SW_HIDE) |
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266 return False # stop enumerating windows |
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267 return True |
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268 |
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269 pid = _kernel32.GetCurrentProcessId() |
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270 user32.EnumWindows(_WNDENUMPROC(callback), pid) |
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271 |
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termwidth: move to ui.ui from util
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272 def termwidth(): |
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273 # cmd.exe does not handle CR like a unix console, the CR is |
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274 # counted in the line length. On 80 columns consoles, if 80 |
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275 # characters are written, the following CR won't apply on the |
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276 # current line but on the new one. Keep room for it. |
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277 width = 79 |
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278 # Query stderr to avoid problems with redirections |
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279 screenbuf = _kernel32.GetStdHandle( |
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280 _STD_ERROR_HANDLE) # don't close the handle returned |
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281 if screenbuf is None or screenbuf == _INVALID_HANDLE_VALUE: |
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282 return width |
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283 csbi = _CONSOLE_SCREEN_BUFFER_INFO() |
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284 if not _kernel32.GetConsoleScreenBufferInfo( |
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285 screenbuf, ctypes.byref(csbi)): |
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286 return width |
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287 width = csbi.srWindow.Right - csbi.srWindow.Left |
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288 return width |
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289 |
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290 def spawndetached(args): |
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291 # No standard library function really spawns a fully detached |
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292 # process under win32 because they allocate pipes or other objects |
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293 # to handle standard streams communications. Passing these objects |
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294 # to the child process requires handle inheritance to be enabled |
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295 # which makes really detached processes impossible. |
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296 si = _STARTUPINFO() |
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297 si.cb = ctypes.sizeof(_STARTUPINFO) |
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298 si.dwFlags = _STARTF_USESHOWWINDOW |
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299 si.wShowWindow = _SW_HIDE |
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300 |
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301 pi = _PROCESS_INFORMATION() |
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302 |
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303 env = '' |
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304 for k in os.environ: |
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305 env += "%s=%s\0" % (k, os.environ[k]) |
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306 if not env: |
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307 env = '\0' |
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308 env += '\0' |
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309 |
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310 args = subprocess.list2cmdline(args) |
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311 # Not running the command in shell mode makes python26 hang when |
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312 # writing to hgweb output socket. |
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313 comspec = os.environ.get("COMSPEC", "cmd.exe") |
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314 args = comspec + " /c " + args |
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315 |
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316 res = _kernel32.CreateProcessA( |
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|
317 None, args, None, None, False, _DETACHED_PROCESS, |
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318 env, os.getcwd(), ctypes.byref(si), ctypes.byref(pi)) |
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319 if not res: |
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320 raise ctypes.WinError() |
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321 |
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322 return pi.dwProcessId |
13775
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windows: move unlink to win32.py
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323 |
930efdc6bfa4
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324 def unlink(f): |
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325 '''try to implement POSIX' unlink semantics on Windows''' |
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326 |
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327 # POSIX allows to unlink and rename open files. Windows has serious |
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328 # problems with doing that: |
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329 # - Calling os.unlink (or os.rename) on a file f fails if f or any |
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|
330 # hardlinked copy of f has been opened with Python's open(). There is no |
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changeset
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331 # way such a file can be deleted or renamed on Windows (other than |
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332 # scheduling the delete or rename for the next reboot). |
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333 # - Calling os.unlink on a file that has been opened with Mercurial's |
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334 # posixfile (or comparable methods) will delay the actual deletion of |
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335 # the file for as long as the file is held open. The filename is blocked |
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336 # during that time and cannot be used for recreating a new file under |
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337 # that same name ("zombie file"). Directories containing such zombie files |
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338 # cannot be removed or moved. |
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339 # A file that has been opened with posixfile can be renamed, so we rename |
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340 # f to a random temporary name before calling os.unlink on it. This allows |
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341 # callers to recreate f immediately while having other readers do their |
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342 # implicit zombie filename blocking on a temporary name. |
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343 |
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344 for tries in xrange(10): |
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345 temp = '%s-%08x' % (f, random.randint(0, 0xffffffff)) |
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346 try: |
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347 os.rename(f, temp) # raises OSError EEXIST if temp exists |
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348 break |
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349 except OSError, e: |
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350 if e.errno != errno.EEXIST: |
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351 raise |
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352 else: |
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353 raise IOError, (errno.EEXIST, "No usable temporary filename found") |
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354 |
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355 try: |
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356 os.unlink(temp) |
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357 except OSError: |
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358 # The unlink might have failed because the READONLY attribute may heave |
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359 # been set on the original file. Rename works fine with READONLY set, |
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360 # but not os.unlink. Reset all attributes and try again. |
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361 _kernel32.SetFileAttributesA(temp, _FILE_ATTRIBUTE_NORMAL) |
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362 try: |
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363 os.unlink(temp) |
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364 except OSError: |
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365 # The unlink might have failed due to some very rude AV-Scanners. |
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366 # Leaking a tempfile is the lesser evil than aborting here and |
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367 # leaving some potentially serious inconsistencies. |
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368 pass |
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369 |
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370 def makedir(path, notindexed): |
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371 os.mkdir(path) |
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372 if notindexed: |
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373 _kernel32.SetFileAttributesA(path, _FILE_ATTRIBUTE_NOT_CONTENT_INDEXED) |