Mercurial > hg
annotate mercurial/win32.py @ 15078:193e7018dc8c
hg: extract copying the store out of clone
author | Simon Heimberg <simohe@besonet.ch> |
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date | Thu, 11 Aug 2011 00:03:16 +0200 |
parents | bf9a105aed0a |
children | ec222a29bdf0 |
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 _advapi32 = ctypes.windll.advapi32 |
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13 _user32 = ctypes.windll.user32 |
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14 |
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15 _BOOL = ctypes.c_long |
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16 _WORD = ctypes.c_ushort |
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17 _DWORD = ctypes.c_ulong |
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18 _UINT = ctypes.c_uint |
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19 _LONG = ctypes.c_long |
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20 _LPCSTR = _LPSTR = ctypes.c_char_p |
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21 _HANDLE = ctypes.c_void_p |
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22 _HWND = _HANDLE |
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23 |
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24 _INVALID_HANDLE_VALUE = _HANDLE(-1).value |
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25 |
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26 # GetLastError |
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27 _ERROR_SUCCESS = 0 |
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28 _ERROR_INVALID_PARAMETER = 87 |
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29 _ERROR_INSUFFICIENT_BUFFER = 122 |
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30 |
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31 # WPARAM is defined as UINT_PTR (unsigned type) |
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32 # LPARAM is defined as LONG_PTR (signed type) |
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33 if ctypes.sizeof(ctypes.c_long) == ctypes.sizeof(ctypes.c_void_p): |
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34 _WPARAM = ctypes.c_ulong |
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35 _LPARAM = ctypes.c_long |
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36 elif ctypes.sizeof(ctypes.c_longlong) == ctypes.sizeof(ctypes.c_void_p): |
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37 _WPARAM = ctypes.c_ulonglong |
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38 _LPARAM = ctypes.c_longlong |
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39 |
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40 class _FILETIME(ctypes.Structure): |
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41 _fields_ = [('dwLowDateTime', _DWORD), |
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42 ('dwHighDateTime', _DWORD)] |
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43 |
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44 class _BY_HANDLE_FILE_INFORMATION(ctypes.Structure): |
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45 _fields_ = [('dwFileAttributes', _DWORD), |
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46 ('ftCreationTime', _FILETIME), |
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47 ('ftLastAccessTime', _FILETIME), |
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48 ('ftLastWriteTime', _FILETIME), |
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49 ('dwVolumeSerialNumber', _DWORD), |
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50 ('nFileSizeHigh', _DWORD), |
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51 ('nFileSizeLow', _DWORD), |
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52 ('nNumberOfLinks', _DWORD), |
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53 ('nFileIndexHigh', _DWORD), |
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54 ('nFileIndexLow', _DWORD)] |
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55 |
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56 # CreateFile |
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57 _FILE_SHARE_READ = 0x00000001 |
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58 _FILE_SHARE_WRITE = 0x00000002 |
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59 _FILE_SHARE_DELETE = 0x00000004 |
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60 |
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61 _OPEN_EXISTING = 3 |
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62 |
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63 # SetFileAttributes |
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64 _FILE_ATTRIBUTE_NORMAL = 0x80 |
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65 _FILE_ATTRIBUTE_NOT_CONTENT_INDEXED = 0x2000 |
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66 |
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67 # Process Security and Access Rights |
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68 _PROCESS_QUERY_INFORMATION = 0x0400 |
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69 |
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70 # GetExitCodeProcess |
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71 _STILL_ACTIVE = 259 |
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72 |
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73 # registry |
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74 _HKEY_CURRENT_USER = 0x80000001L |
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75 _HKEY_LOCAL_MACHINE = 0x80000002L |
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76 _KEY_READ = 0x20019 |
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77 _REG_SZ = 1 |
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78 _REG_DWORD = 4 |
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79 |
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80 class _STARTUPINFO(ctypes.Structure): |
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81 _fields_ = [('cb', _DWORD), |
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82 ('lpReserved', _LPSTR), |
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83 ('lpDesktop', _LPSTR), |
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84 ('lpTitle', _LPSTR), |
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85 ('dwX', _DWORD), |
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86 ('dwY', _DWORD), |
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87 ('dwXSize', _DWORD), |
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88 ('dwYSize', _DWORD), |
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89 ('dwXCountChars', _DWORD), |
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90 ('dwYCountChars', _DWORD), |
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91 ('dwFillAttribute', _DWORD), |
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92 ('dwFlags', _DWORD), |
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93 ('wShowWindow', _WORD), |
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94 ('cbReserved2', _WORD), |
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95 ('lpReserved2', ctypes.c_char_p), |
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96 ('hStdInput', _HANDLE), |
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97 ('hStdOutput', _HANDLE), |
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98 ('hStdError', _HANDLE)] |
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99 |
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100 class _PROCESS_INFORMATION(ctypes.Structure): |
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101 _fields_ = [('hProcess', _HANDLE), |
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102 ('hThread', _HANDLE), |
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103 ('dwProcessId', _DWORD), |
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104 ('dwThreadId', _DWORD)] |
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105 |
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106 _DETACHED_PROCESS = 0x00000008 |
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107 _STARTF_USESHOWWINDOW = 0x00000001 |
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108 _SW_HIDE = 0 |
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109 |
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110 class _COORD(ctypes.Structure): |
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111 _fields_ = [('X', ctypes.c_short), |
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112 ('Y', ctypes.c_short)] |
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113 |
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114 class _SMALL_RECT(ctypes.Structure): |
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115 _fields_ = [('Left', ctypes.c_short), |
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116 ('Top', ctypes.c_short), |
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117 ('Right', ctypes.c_short), |
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118 ('Bottom', ctypes.c_short)] |
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119 |
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120 class _CONSOLE_SCREEN_BUFFER_INFO(ctypes.Structure): |
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121 _fields_ = [('dwSize', _COORD), |
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122 ('dwCursorPosition', _COORD), |
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123 ('wAttributes', _WORD), |
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124 ('srWindow', _SMALL_RECT), |
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125 ('dwMaximumWindowSize', _COORD)] |
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126 |
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127 _STD_ERROR_HANDLE = _DWORD(-12).value |
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128 |
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129 # types of parameters of C functions used (required by pypy) |
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130 |
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131 _kernel32.CreateFileA.argtypes = [_LPCSTR, _DWORD, _DWORD, ctypes.c_void_p, |
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132 _DWORD, _DWORD, _HANDLE] |
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133 _kernel32.CreateFileA.restype = _HANDLE |
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134 |
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135 _kernel32.GetFileInformationByHandle.argtypes = [_HANDLE, ctypes.c_void_p] |
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136 _kernel32.GetFileInformationByHandle.restype = _BOOL |
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137 |
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138 _kernel32.CloseHandle.argtypes = [_HANDLE] |
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139 _kernel32.CloseHandle.restype = _BOOL |
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140 |
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141 _kernel32.CreateHardLinkA.argtypes = [_LPCSTR, _LPCSTR, ctypes.c_void_p] |
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142 _kernel32.CreateHardLinkA.restype = _BOOL |
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143 |
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144 _kernel32.SetFileAttributesA.argtypes = [_LPCSTR, _DWORD] |
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145 _kernel32.SetFileAttributesA.restype = _BOOL |
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146 |
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147 _kernel32.OpenProcess.argtypes = [_DWORD, _BOOL, _DWORD] |
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148 _kernel32.OpenProcess.restype = _HANDLE |
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149 |
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150 _kernel32.GetExitCodeProcess.argtypes = [_HANDLE, ctypes.c_void_p] |
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151 _kernel32.GetExitCodeProcess.restype = _BOOL |
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152 |
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153 _kernel32.GetLastError.argtypes = [] |
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154 _kernel32.GetLastError.restype = _DWORD |
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155 |
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156 _kernel32.GetModuleFileNameA.argtypes = [_HANDLE, ctypes.c_void_p, _DWORD] |
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157 _kernel32.GetModuleFileNameA.restype = _DWORD |
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158 |
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159 _kernel32.CreateProcessA.argtypes = [_LPCSTR, _LPCSTR, ctypes.c_void_p, |
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160 ctypes.c_void_p, _BOOL, _DWORD, ctypes.c_void_p, _LPCSTR, ctypes.c_void_p, |
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161 ctypes.c_void_p] |
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162 _kernel32.CreateProcessA.restype = _BOOL |
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163 |
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164 _kernel32.ExitProcess.argtypes = [_UINT] |
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165 _kernel32.ExitProcess.restype = None |
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166 |
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167 _kernel32.GetCurrentProcessId.argtypes = [] |
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168 _kernel32.GetCurrentProcessId.restype = _DWORD |
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169 |
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170 _SIGNAL_HANDLER = ctypes.WINFUNCTYPE(_BOOL, _DWORD) |
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171 _kernel32.SetConsoleCtrlHandler.argtypes = [_SIGNAL_HANDLER, _BOOL] |
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172 _kernel32.SetConsoleCtrlHandler.restype = _BOOL |
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173 |
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174 _kernel32.GetStdHandle.argtypes = [_DWORD] |
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175 _kernel32.GetStdHandle.restype = _HANDLE |
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176 |
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177 _kernel32.GetConsoleScreenBufferInfo.argtypes = [_HANDLE, ctypes.c_void_p] |
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178 _kernel32.GetConsoleScreenBufferInfo.restype = _BOOL |
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179 |
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180 _advapi32.RegOpenKeyExA.argtypes = [_HANDLE, _LPCSTR, _DWORD, _DWORD, |
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181 ctypes.c_void_p] |
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182 _advapi32.RegOpenKeyExA.restype = _LONG |
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183 |
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184 _advapi32.RegQueryValueExA.argtypes = [_HANDLE, _LPCSTR, ctypes.c_void_p, |
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185 ctypes.c_void_p, ctypes.c_void_p, ctypes.c_void_p] |
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186 _advapi32.RegQueryValueExA.restype = _LONG |
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187 |
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188 _advapi32.RegCloseKey.argtypes = [_HANDLE] |
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189 _advapi32.RegCloseKey.restype = _LONG |
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190 |
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191 _advapi32.GetUserNameA.argtypes = [ctypes.c_void_p, ctypes.c_void_p] |
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192 _advapi32.GetUserNameA.restype = _BOOL |
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193 |
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194 _user32.GetWindowThreadProcessId.argtypes = [_HANDLE, ctypes.c_void_p] |
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195 _user32.GetWindowThreadProcessId.restype = _DWORD |
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196 |
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197 _user32.ShowWindow.argtypes = [_HANDLE, ctypes.c_int] |
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198 _user32.ShowWindow.restype = _BOOL |
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199 |
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200 _WNDENUMPROC = ctypes.WINFUNCTYPE(_BOOL, _HWND, _LPARAM) |
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201 _user32.EnumWindows.argtypes = [_WNDENUMPROC, _LPARAM] |
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202 _user32.EnumWindows.restype = _BOOL |
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203 |
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204 def _raiseoserror(name): |
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205 err = ctypes.WinError() |
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206 raise OSError(err.errno, '%s: %s' % (name, err.strerror)) |
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207 |
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208 def _getfileinfo(name): |
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209 fh = _kernel32.CreateFileA(name, 0, |
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210 _FILE_SHARE_READ | _FILE_SHARE_WRITE | _FILE_SHARE_DELETE, |
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211 None, _OPEN_EXISTING, 0, None) |
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212 if fh == _INVALID_HANDLE_VALUE: |
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213 _raiseoserror(name) |
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214 try: |
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215 fi = _BY_HANDLE_FILE_INFORMATION() |
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216 if not _kernel32.GetFileInformationByHandle(fh, ctypes.byref(fi)): |
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217 _raiseoserror(name) |
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218 return fi |
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219 finally: |
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220 _kernel32.CloseHandle(fh) |
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221 |
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222 def oslink(src, dst): |
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223 try: |
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224 if not _kernel32.CreateHardLinkA(dst, src, None): |
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225 _raiseoserror(src) |
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226 except AttributeError: # Wine doesn't support this function |
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227 _raiseoserror(src) |
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228 |
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229 def nlinks(name): |
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230 '''return number of hardlinks for the given file''' |
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231 return _getfileinfo(name).nNumberOfLinks |
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232 |
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233 def samefile(fpath1, fpath2): |
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234 '''Returns whether fpath1 and fpath2 refer to the same file. This is only |
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235 guaranteed to work for files, not directories.''' |
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236 res1 = _getfileinfo(fpath1) |
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237 res2 = _getfileinfo(fpath2) |
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238 return (res1.dwVolumeSerialNumber == res2.dwVolumeSerialNumber |
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239 and res1.nFileIndexHigh == res2.nFileIndexHigh |
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240 and res1.nFileIndexLow == res2.nFileIndexLow) |
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241 |
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242 def samedevice(fpath1, fpath2): |
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243 '''Returns whether fpath1 and fpath2 are on the same device. This is only |
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244 guaranteed to work for files, not directories.''' |
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245 res1 = _getfileinfo(fpath1) |
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246 res2 = _getfileinfo(fpath2) |
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247 return res1.dwVolumeSerialNumber == res2.dwVolumeSerialNumber |
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248 |
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249 def testpid(pid): |
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250 '''return True if pid is still running or unable to |
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251 determine, False otherwise''' |
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252 h = _kernel32.OpenProcess(_PROCESS_QUERY_INFORMATION, False, pid) |
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253 if h: |
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254 try: |
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255 status = _DWORD() |
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256 if _kernel32.GetExitCodeProcess(h, ctypes.byref(status)): |
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257 return status.value == _STILL_ACTIVE |
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258 finally: |
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259 _kernel32.CloseHandle(h) |
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260 return _kernel32.GetLastError() != _ERROR_INVALID_PARAMETER |
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261 |
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262 def lookupreg(key, valname=None, scope=None): |
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263 ''' Look up a key/value name in the Windows registry. |
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264 |
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265 valname: value name. If unspecified, the default value for the key |
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266 is used. |
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267 scope: optionally specify scope for registry lookup, this can be |
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268 a sequence of scopes to look up in order. Default (CURRENT_USER, |
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269 LOCAL_MACHINE). |
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270 ''' |
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271 byref = ctypes.byref |
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272 if scope is None: |
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273 scope = (_HKEY_CURRENT_USER, _HKEY_LOCAL_MACHINE) |
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274 elif not isinstance(scope, (list, tuple)): |
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275 scope = (scope,) |
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276 for s in scope: |
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277 kh = _HANDLE() |
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278 res = _advapi32.RegOpenKeyExA(s, key, 0, _KEY_READ, ctypes.byref(kh)) |
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279 if res != _ERROR_SUCCESS: |
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280 continue |
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281 try: |
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282 size = _DWORD(600) |
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283 type = _DWORD() |
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284 buf = ctypes.create_string_buffer(size.value + 1) |
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285 res = _advapi32.RegQueryValueExA(kh.value, valname, None, |
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286 byref(type), buf, byref(size)) |
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287 if res != _ERROR_SUCCESS: |
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288 continue |
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289 if type.value == _REG_SZ: |
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290 # never let a Unicode string escape into the wild |
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291 return encoding.tolocal(buf.value.encode('UTF-8')) |
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292 elif type.value == _REG_DWORD: |
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293 fmt = '<L' |
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294 s = ctypes.string_at(byref(buf), struct.calcsize(fmt)) |
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295 return struct.unpack(fmt, s)[0] |
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296 finally: |
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297 _advapi32.RegCloseKey(kh.value) |
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298 |
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299 def executablepath(): |
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300 '''return full path of hg.exe''' |
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301 size = 600 |
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302 buf = ctypes.create_string_buffer(size + 1) |
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303 len = _kernel32.GetModuleFileNameA(None, ctypes.byref(buf), size) |
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304 if len == 0: |
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305 raise ctypes.WinError() |
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306 elif len == size: |
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307 raise ctypes.WinError(_ERROR_INSUFFICIENT_BUFFER) |
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308 return buf.value |
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309 |
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310 def getuser(): |
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311 '''return name of current user''' |
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312 size = _DWORD(300) |
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313 buf = ctypes.create_string_buffer(size.value + 1) |
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314 if not _advapi32.GetUserNameA(ctypes.byref(buf), ctypes.byref(size)): |
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315 raise ctypes.WinError() |
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316 return buf.value |
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317 |
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318 _signalhandler = [] |
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319 |
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320 def setsignalhandler(): |
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321 '''Register a termination handler for console events including |
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322 CTRL+C. python signal handlers do not work well with socket |
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323 operations. |
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324 ''' |
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325 def handler(event): |
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326 _kernel32.ExitProcess(1) |
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327 |
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328 if _signalhandler: |
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329 return # already registered |
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330 h = _SIGNAL_HANDLER(handler) |
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331 _signalhandler.append(h) # needed to prevent garbage collection |
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332 if not _kernel32.SetConsoleCtrlHandler(h, True): |
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333 raise ctypes.WinError() |
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334 |
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335 def hidewindow(): |
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336 |
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337 def callback(hwnd, pid): |
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338 wpid = _DWORD() |
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339 _user32.GetWindowThreadProcessId(hwnd, ctypes.byref(wpid)) |
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340 if pid == wpid.value: |
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341 _user32.ShowWindow(hwnd, _SW_HIDE) |
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342 return False # stop enumerating windows |
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343 return True |
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344 |
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345 pid = _kernel32.GetCurrentProcessId() |
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346 _user32.EnumWindows(_WNDENUMPROC(callback), pid) |
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347 |
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348 def termwidth(): |
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349 # cmd.exe does not handle CR like a unix console, the CR is |
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350 # counted in the line length. On 80 columns consoles, if 80 |
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351 # characters are written, the following CR won't apply on the |
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352 # current line but on the new one. Keep room for it. |
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353 width = 79 |
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354 # Query stderr to avoid problems with redirections |
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355 screenbuf = _kernel32.GetStdHandle( |
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356 _STD_ERROR_HANDLE) # don't close the handle returned |
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357 if screenbuf is None or screenbuf == _INVALID_HANDLE_VALUE: |
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358 return width |
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359 csbi = _CONSOLE_SCREEN_BUFFER_INFO() |
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360 if not _kernel32.GetConsoleScreenBufferInfo( |
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361 screenbuf, ctypes.byref(csbi)): |
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362 return width |
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363 width = csbi.srWindow.Right - csbi.srWindow.Left |
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364 return width |
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365 |
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366 def spawndetached(args): |
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367 # No standard library function really spawns a fully detached |
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368 # process under win32 because they allocate pipes or other objects |
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369 # to handle standard streams communications. Passing these objects |
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370 # to the child process requires handle inheritance to be enabled |
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371 # which makes really detached processes impossible. |
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372 si = _STARTUPINFO() |
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373 si.cb = ctypes.sizeof(_STARTUPINFO) |
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374 si.dwFlags = _STARTF_USESHOWWINDOW |
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375 si.wShowWindow = _SW_HIDE |
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376 |
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377 pi = _PROCESS_INFORMATION() |
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378 |
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379 env = '' |
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380 for k in os.environ: |
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381 env += "%s=%s\0" % (k, os.environ[k]) |
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382 if not env: |
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383 env = '\0' |
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384 env += '\0' |
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385 |
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386 args = subprocess.list2cmdline(args) |
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387 # Not running the command in shell mode makes python26 hang when |
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388 # writing to hgweb output socket. |
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389 comspec = os.environ.get("COMSPEC", "cmd.exe") |
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390 args = comspec + " /c " + args |
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391 |
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392 res = _kernel32.CreateProcessA( |
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393 None, args, None, None, False, _DETACHED_PROCESS, |
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394 env, os.getcwd(), ctypes.byref(si), ctypes.byref(pi)) |
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395 if not res: |
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396 raise ctypes.WinError() |
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397 |
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398 return pi.dwProcessId |
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399 |
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400 def unlink(f): |
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401 '''try to implement POSIX' unlink semantics on Windows''' |
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402 |
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403 # POSIX allows to unlink and rename open files. Windows has serious |
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404 # problems with doing that: |
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405 # - Calling os.unlink (or os.rename) on a file f fails if f or any |
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406 # hardlinked copy of f has been opened with Python's open(). There is no |
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407 # way such a file can be deleted or renamed on Windows (other than |
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408 # scheduling the delete or rename for the next reboot). |
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409 # - Calling os.unlink on a file that has been opened with Mercurial's |
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410 # posixfile (or comparable methods) will delay the actual deletion of |
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411 # the file for as long as the file is held open. The filename is blocked |
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412 # during that time and cannot be used for recreating a new file under |
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413 # that same name ("zombie file"). Directories containing such zombie files |
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414 # cannot be removed or moved. |
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415 # A file that has been opened with posixfile can be renamed, so we rename |
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416 # f to a random temporary name before calling os.unlink on it. This allows |
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417 # callers to recreate f immediately while having other readers do their |
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418 # implicit zombie filename blocking on a temporary name. |
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419 |
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420 for tries in xrange(10): |
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421 temp = '%s-%08x' % (f, random.randint(0, 0xffffffff)) |
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422 try: |
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423 os.rename(f, temp) # raises OSError EEXIST if temp exists |
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424 break |
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425 except OSError, e: |
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426 if e.errno != errno.EEXIST: |
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427 raise |
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428 else: |
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429 raise IOError, (errno.EEXIST, "No usable temporary filename found") |
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430 |
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431 try: |
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432 os.unlink(temp) |
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433 except OSError: |
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434 # The unlink might have failed because the READONLY attribute may heave |
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435 # been set on the original file. Rename works fine with READONLY set, |
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436 # but not os.unlink. Reset all attributes and try again. |
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437 _kernel32.SetFileAttributesA(temp, _FILE_ATTRIBUTE_NORMAL) |
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438 try: |
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439 os.unlink(temp) |
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440 except OSError: |
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441 # The unlink might have failed due to some very rude AV-Scanners. |
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442 # Leaking a tempfile is the lesser evil than aborting here and |
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443 # leaving some potentially serious inconsistencies. |
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444 pass |
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set NOT_CONTENT_INDEXED on .hg dir (issue2694)
Adrian Buehlmann <adrian@cadifra.com>
parents:
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445 |
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parents:
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446 def makedir(path, notindexed): |
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parents:
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447 os.mkdir(path) |
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parents:
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448 if notindexed: |
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parents:
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449 _kernel32.SetFileAttributesA(path, _FILE_ATTRIBUTE_NOT_CONTENT_INDEXED) |