Mercurial > hg
annotate mercurial/win32.py @ 32129:f0ea0f642627
py3: make posix.getuser return a bytes
author | Pulkit Goyal <7895pulkit@gmail.com> |
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date | Fri, 21 Apr 2017 00:53:38 +0530 |
parents | 5861bdbeb9a3 |
children | 2d56e6d23be7 |
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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 from __future__ import absolute_import |
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9 |
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10 import ctypes |
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11 import errno |
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12 import msvcrt |
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13 import os |
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14 import random |
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15 import subprocess |
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16 |
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17 from . import ( |
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18 encoding, |
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19 pycompat, |
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20 ) |
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21 |
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22 _kernel32 = ctypes.windll.kernel32 |
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23 _advapi32 = ctypes.windll.advapi32 |
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24 _user32 = ctypes.windll.user32 |
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25 |
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26 _BOOL = ctypes.c_long |
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27 _WORD = ctypes.c_ushort |
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28 _DWORD = ctypes.c_ulong |
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29 _UINT = ctypes.c_uint |
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30 _LONG = ctypes.c_long |
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31 _LPCSTR = _LPSTR = ctypes.c_char_p |
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32 _HANDLE = ctypes.c_void_p |
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33 _HWND = _HANDLE |
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34 |
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35 _INVALID_HANDLE_VALUE = _HANDLE(-1).value |
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36 |
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37 # GetLastError |
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38 _ERROR_SUCCESS = 0 |
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39 _ERROR_NO_MORE_FILES = 18 |
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40 _ERROR_INVALID_PARAMETER = 87 |
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41 _ERROR_BROKEN_PIPE = 109 |
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42 _ERROR_INSUFFICIENT_BUFFER = 122 |
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43 |
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44 # WPARAM is defined as UINT_PTR (unsigned type) |
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45 # LPARAM is defined as LONG_PTR (signed type) |
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46 if ctypes.sizeof(ctypes.c_long) == ctypes.sizeof(ctypes.c_void_p): |
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47 _WPARAM = ctypes.c_ulong |
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48 _LPARAM = ctypes.c_long |
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49 elif ctypes.sizeof(ctypes.c_longlong) == ctypes.sizeof(ctypes.c_void_p): |
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50 _WPARAM = ctypes.c_ulonglong |
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51 _LPARAM = ctypes.c_longlong |
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52 |
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53 class _FILETIME(ctypes.Structure): |
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54 _fields_ = [('dwLowDateTime', _DWORD), |
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55 ('dwHighDateTime', _DWORD)] |
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56 |
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57 class _BY_HANDLE_FILE_INFORMATION(ctypes.Structure): |
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58 _fields_ = [('dwFileAttributes', _DWORD), |
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59 ('ftCreationTime', _FILETIME), |
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60 ('ftLastAccessTime', _FILETIME), |
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61 ('ftLastWriteTime', _FILETIME), |
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62 ('dwVolumeSerialNumber', _DWORD), |
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63 ('nFileSizeHigh', _DWORD), |
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64 ('nFileSizeLow', _DWORD), |
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65 ('nNumberOfLinks', _DWORD), |
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66 ('nFileIndexHigh', _DWORD), |
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67 ('nFileIndexLow', _DWORD)] |
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68 |
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69 # CreateFile |
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70 _FILE_SHARE_READ = 0x00000001 |
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71 _FILE_SHARE_WRITE = 0x00000002 |
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72 _FILE_SHARE_DELETE = 0x00000004 |
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73 |
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74 _OPEN_EXISTING = 3 |
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75 |
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76 _FILE_FLAG_BACKUP_SEMANTICS = 0x02000000 |
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77 |
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78 # SetFileAttributes |
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79 _FILE_ATTRIBUTE_NORMAL = 0x80 |
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80 _FILE_ATTRIBUTE_NOT_CONTENT_INDEXED = 0x2000 |
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81 |
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82 # Process Security and Access Rights |
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83 _PROCESS_QUERY_INFORMATION = 0x0400 |
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84 |
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85 # GetExitCodeProcess |
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86 _STILL_ACTIVE = 259 |
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87 |
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88 class _STARTUPINFO(ctypes.Structure): |
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89 _fields_ = [('cb', _DWORD), |
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90 ('lpReserved', _LPSTR), |
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91 ('lpDesktop', _LPSTR), |
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92 ('lpTitle', _LPSTR), |
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93 ('dwX', _DWORD), |
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94 ('dwY', _DWORD), |
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95 ('dwXSize', _DWORD), |
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96 ('dwYSize', _DWORD), |
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97 ('dwXCountChars', _DWORD), |
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98 ('dwYCountChars', _DWORD), |
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99 ('dwFillAttribute', _DWORD), |
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100 ('dwFlags', _DWORD), |
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101 ('wShowWindow', _WORD), |
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102 ('cbReserved2', _WORD), |
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103 ('lpReserved2', ctypes.c_char_p), |
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104 ('hStdInput', _HANDLE), |
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105 ('hStdOutput', _HANDLE), |
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106 ('hStdError', _HANDLE)] |
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107 |
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108 class _PROCESS_INFORMATION(ctypes.Structure): |
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109 _fields_ = [('hProcess', _HANDLE), |
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110 ('hThread', _HANDLE), |
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111 ('dwProcessId', _DWORD), |
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112 ('dwThreadId', _DWORD)] |
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113 |
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114 _CREATE_NO_WINDOW = 0x08000000 |
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115 _SW_HIDE = 0 |
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116 |
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117 class _COORD(ctypes.Structure): |
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118 _fields_ = [('X', ctypes.c_short), |
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119 ('Y', ctypes.c_short)] |
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120 |
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121 class _SMALL_RECT(ctypes.Structure): |
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122 _fields_ = [('Left', ctypes.c_short), |
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123 ('Top', ctypes.c_short), |
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124 ('Right', ctypes.c_short), |
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125 ('Bottom', ctypes.c_short)] |
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126 |
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127 class _CONSOLE_SCREEN_BUFFER_INFO(ctypes.Structure): |
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128 _fields_ = [('dwSize', _COORD), |
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129 ('dwCursorPosition', _COORD), |
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130 ('wAttributes', _WORD), |
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131 ('srWindow', _SMALL_RECT), |
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132 ('dwMaximumWindowSize', _COORD)] |
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133 |
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134 _STD_ERROR_HANDLE = _DWORD(-12).value |
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135 |
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136 # CreateToolhelp32Snapshot, Process32First, Process32Next |
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137 _TH32CS_SNAPPROCESS = 0x00000002 |
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138 _MAX_PATH = 260 |
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139 |
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140 class _tagPROCESSENTRY32(ctypes.Structure): |
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141 _fields_ = [('dwsize', _DWORD), |
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142 ('cntUsage', _DWORD), |
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143 ('th32ProcessID', _DWORD), |
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144 ('th32DefaultHeapID', ctypes.c_void_p), |
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145 ('th32ModuleID', _DWORD), |
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146 ('cntThreads', _DWORD), |
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147 ('th32ParentProcessID', _DWORD), |
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148 ('pcPriClassBase', _LONG), |
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149 ('dwFlags', _DWORD), |
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150 ('szExeFile', ctypes.c_char * _MAX_PATH)] |
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151 |
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152 def __init__(self): |
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153 super(_tagPROCESSENTRY32, self).__init__() |
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154 self.dwsize = ctypes.sizeof(self) |
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155 |
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156 |
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157 # types of parameters of C functions used (required by pypy) |
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158 |
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159 _kernel32.CreateFileA.argtypes = [_LPCSTR, _DWORD, _DWORD, ctypes.c_void_p, |
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160 _DWORD, _DWORD, _HANDLE] |
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161 _kernel32.CreateFileA.restype = _HANDLE |
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162 |
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163 _kernel32.GetFileInformationByHandle.argtypes = [_HANDLE, ctypes.c_void_p] |
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164 _kernel32.GetFileInformationByHandle.restype = _BOOL |
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165 |
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166 _kernel32.CloseHandle.argtypes = [_HANDLE] |
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167 _kernel32.CloseHandle.restype = _BOOL |
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168 |
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169 try: |
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170 _kernel32.CreateHardLinkA.argtypes = [_LPCSTR, _LPCSTR, ctypes.c_void_p] |
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171 _kernel32.CreateHardLinkA.restype = _BOOL |
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172 except AttributeError: |
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173 pass |
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174 |
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175 _kernel32.SetFileAttributesA.argtypes = [_LPCSTR, _DWORD] |
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176 _kernel32.SetFileAttributesA.restype = _BOOL |
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177 |
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178 _kernel32.OpenProcess.argtypes = [_DWORD, _BOOL, _DWORD] |
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179 _kernel32.OpenProcess.restype = _HANDLE |
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180 |
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181 _kernel32.GetExitCodeProcess.argtypes = [_HANDLE, ctypes.c_void_p] |
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182 _kernel32.GetExitCodeProcess.restype = _BOOL |
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183 |
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184 _kernel32.GetLastError.argtypes = [] |
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185 _kernel32.GetLastError.restype = _DWORD |
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186 |
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187 _kernel32.GetModuleFileNameA.argtypes = [_HANDLE, ctypes.c_void_p, _DWORD] |
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188 _kernel32.GetModuleFileNameA.restype = _DWORD |
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189 |
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190 _kernel32.CreateProcessA.argtypes = [_LPCSTR, _LPCSTR, ctypes.c_void_p, |
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191 ctypes.c_void_p, _BOOL, _DWORD, ctypes.c_void_p, _LPCSTR, ctypes.c_void_p, |
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192 ctypes.c_void_p] |
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193 _kernel32.CreateProcessA.restype = _BOOL |
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194 |
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195 _kernel32.ExitProcess.argtypes = [_UINT] |
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196 _kernel32.ExitProcess.restype = None |
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197 |
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198 _kernel32.GetCurrentProcessId.argtypes = [] |
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199 _kernel32.GetCurrentProcessId.restype = _DWORD |
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200 |
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201 _SIGNAL_HANDLER = ctypes.WINFUNCTYPE(_BOOL, _DWORD) |
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202 _kernel32.SetConsoleCtrlHandler.argtypes = [_SIGNAL_HANDLER, _BOOL] |
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203 _kernel32.SetConsoleCtrlHandler.restype = _BOOL |
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204 |
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205 _kernel32.GetStdHandle.argtypes = [_DWORD] |
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206 _kernel32.GetStdHandle.restype = _HANDLE |
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207 |
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208 _kernel32.GetConsoleScreenBufferInfo.argtypes = [_HANDLE, ctypes.c_void_p] |
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209 _kernel32.GetConsoleScreenBufferInfo.restype = _BOOL |
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210 |
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211 _advapi32.GetUserNameA.argtypes = [ctypes.c_void_p, ctypes.c_void_p] |
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212 _advapi32.GetUserNameA.restype = _BOOL |
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213 |
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214 _user32.GetWindowThreadProcessId.argtypes = [_HANDLE, ctypes.c_void_p] |
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215 _user32.GetWindowThreadProcessId.restype = _DWORD |
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216 |
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217 _user32.ShowWindow.argtypes = [_HANDLE, ctypes.c_int] |
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218 _user32.ShowWindow.restype = _BOOL |
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219 |
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220 _WNDENUMPROC = ctypes.WINFUNCTYPE(_BOOL, _HWND, _LPARAM) |
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221 _user32.EnumWindows.argtypes = [_WNDENUMPROC, _LPARAM] |
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222 _user32.EnumWindows.restype = _BOOL |
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223 |
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224 _kernel32.CreateToolhelp32Snapshot.argtypes = [_DWORD, _DWORD] |
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225 _kernel32.CreateToolhelp32Snapshot.restype = _BOOL |
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226 |
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227 _kernel32.PeekNamedPipe.argtypes = [_HANDLE, ctypes.c_void_p, _DWORD, |
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228 ctypes.c_void_p, ctypes.c_void_p, ctypes.c_void_p] |
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229 _kernel32.PeekNamedPipe.restype = _BOOL |
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230 |
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231 _kernel32.Process32First.argtypes = [_HANDLE, ctypes.c_void_p] |
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232 _kernel32.Process32First.restype = _BOOL |
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233 |
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234 _kernel32.Process32Next.argtypes = [_HANDLE, ctypes.c_void_p] |
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235 _kernel32.Process32Next.restype = _BOOL |
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236 |
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237 def _raiseoserror(name): |
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238 err = ctypes.WinError() |
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239 raise OSError(err.errno, '%s: %s' % (name, err.strerror)) |
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240 |
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241 def _getfileinfo(name): |
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242 fh = _kernel32.CreateFileA(name, 0, |
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243 _FILE_SHARE_READ | _FILE_SHARE_WRITE | _FILE_SHARE_DELETE, |
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244 None, _OPEN_EXISTING, _FILE_FLAG_BACKUP_SEMANTICS, None) |
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245 if fh == _INVALID_HANDLE_VALUE: |
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246 _raiseoserror(name) |
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247 try: |
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248 fi = _BY_HANDLE_FILE_INFORMATION() |
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249 if not _kernel32.GetFileInformationByHandle(fh, ctypes.byref(fi)): |
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250 _raiseoserror(name) |
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251 return fi |
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252 finally: |
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253 _kernel32.CloseHandle(fh) |
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254 |
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255 def oslink(src, dst): |
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256 try: |
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257 if not _kernel32.CreateHardLinkA(dst, src, None): |
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258 _raiseoserror(src) |
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259 except AttributeError: # Wine doesn't support this function |
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260 _raiseoserror(src) |
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261 |
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262 def nlinks(name): |
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263 '''return number of hardlinks for the given file''' |
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264 return _getfileinfo(name).nNumberOfLinks |
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265 |
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266 def samefile(path1, path2): |
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267 '''Returns whether path1 and path2 refer to the same file or directory.''' |
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268 res1 = _getfileinfo(path1) |
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269 res2 = _getfileinfo(path2) |
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270 return (res1.dwVolumeSerialNumber == res2.dwVolumeSerialNumber |
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271 and res1.nFileIndexHigh == res2.nFileIndexHigh |
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272 and res1.nFileIndexLow == res2.nFileIndexLow) |
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273 |
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274 def samedevice(path1, path2): |
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275 '''Returns whether path1 and path2 are on the same device.''' |
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276 res1 = _getfileinfo(path1) |
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277 res2 = _getfileinfo(path2) |
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278 return res1.dwVolumeSerialNumber == res2.dwVolumeSerialNumber |
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279 |
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280 def peekpipe(pipe): |
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281 handle = msvcrt.get_osfhandle(pipe.fileno()) |
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282 avail = _DWORD() |
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283 |
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284 if not _kernel32.PeekNamedPipe(handle, None, 0, None, ctypes.byref(avail), |
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285 None): |
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286 err = _kernel32.GetLastError() |
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287 if err == _ERROR_BROKEN_PIPE: |
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288 return 0 |
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289 raise ctypes.WinError(err) |
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290 |
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291 return avail.value |
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292 |
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293 def testpid(pid): |
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294 '''return True if pid is still running or unable to |
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295 determine, False otherwise''' |
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296 h = _kernel32.OpenProcess(_PROCESS_QUERY_INFORMATION, False, pid) |
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297 if h: |
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298 try: |
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299 status = _DWORD() |
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300 if _kernel32.GetExitCodeProcess(h, ctypes.byref(status)): |
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301 return status.value == _STILL_ACTIVE |
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302 finally: |
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303 _kernel32.CloseHandle(h) |
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304 return _kernel32.GetLastError() != _ERROR_INVALID_PARAMETER |
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305 |
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306 def executablepath(): |
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307 '''return full path of hg.exe''' |
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308 size = 600 |
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309 buf = ctypes.create_string_buffer(size + 1) |
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310 len = _kernel32.GetModuleFileNameA(None, ctypes.byref(buf), size) |
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311 if len == 0: |
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312 raise ctypes.WinError() # Note: WinError is a function |
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313 elif len == size: |
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314 raise ctypes.WinError(_ERROR_INSUFFICIENT_BUFFER) |
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315 return buf.value |
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316 |
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317 def getuser(): |
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318 '''return name of current user''' |
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319 size = _DWORD(300) |
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320 buf = ctypes.create_string_buffer(size.value + 1) |
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321 if not _advapi32.GetUserNameA(ctypes.byref(buf), ctypes.byref(size)): |
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322 raise ctypes.WinError() |
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323 return buf.value |
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324 |
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325 _signalhandler = [] |
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326 |
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327 def setsignalhandler(): |
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328 '''Register a termination handler for console events including |
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329 CTRL+C. python signal handlers do not work well with socket |
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330 operations. |
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331 ''' |
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332 def handler(event): |
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333 _kernel32.ExitProcess(1) |
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334 |
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335 if _signalhandler: |
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336 return # already registered |
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337 h = _SIGNAL_HANDLER(handler) |
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338 _signalhandler.append(h) # needed to prevent garbage collection |
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339 if not _kernel32.SetConsoleCtrlHandler(h, True): |
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340 raise ctypes.WinError() |
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341 |
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342 def hidewindow(): |
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343 |
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344 def callback(hwnd, pid): |
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345 wpid = _DWORD() |
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346 _user32.GetWindowThreadProcessId(hwnd, ctypes.byref(wpid)) |
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347 if pid == wpid.value: |
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348 _user32.ShowWindow(hwnd, _SW_HIDE) |
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349 return False # stop enumerating windows |
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350 return True |
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351 |
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352 pid = _kernel32.GetCurrentProcessId() |
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353 _user32.EnumWindows(_WNDENUMPROC(callback), pid) |
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354 |
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355 def termsize(): |
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356 # cmd.exe does not handle CR like a unix console, the CR is |
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357 # counted in the line length. On 80 columns consoles, if 80 |
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358 # characters are written, the following CR won't apply on the |
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359 # current line but on the new one. Keep room for it. |
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360 width = 80 - 1 |
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361 height = 25 |
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362 # Query stderr to avoid problems with redirections |
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363 screenbuf = _kernel32.GetStdHandle( |
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364 _STD_ERROR_HANDLE) # don't close the handle returned |
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365 if screenbuf is None or screenbuf == _INVALID_HANDLE_VALUE: |
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366 return width, height |
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367 csbi = _CONSOLE_SCREEN_BUFFER_INFO() |
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368 if not _kernel32.GetConsoleScreenBufferInfo( |
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369 screenbuf, ctypes.byref(csbi)): |
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370 return width, height |
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371 width = csbi.srWindow.Right - csbi.srWindow.Left # don't '+ 1' |
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372 height = csbi.srWindow.Bottom - csbi.srWindow.Top + 1 |
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373 return width, height |
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374 |
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375 def _1stchild(pid): |
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376 '''return the 1st found child of the given pid |
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377 |
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378 None is returned when no child is found''' |
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379 pe = _tagPROCESSENTRY32() |
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380 |
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381 # create handle to list all processes |
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382 ph = _kernel32.CreateToolhelp32Snapshot(_TH32CS_SNAPPROCESS, 0) |
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383 if ph == _INVALID_HANDLE_VALUE: |
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384 raise ctypes.WinError() |
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385 try: |
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386 r = _kernel32.Process32First(ph, ctypes.byref(pe)) |
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387 # loop over all processes |
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388 while r: |
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389 if pe.th32ParentProcessID == pid: |
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390 # return first child found |
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391 return pe.th32ProcessID |
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392 r = _kernel32.Process32Next(ph, ctypes.byref(pe)) |
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393 finally: |
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394 _kernel32.CloseHandle(ph) |
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395 if _kernel32.GetLastError() != _ERROR_NO_MORE_FILES: |
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396 raise ctypes.WinError() |
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397 return None # no child found |
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398 |
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399 class _tochildpid(int): # pid is _DWORD, which always matches in an int |
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400 '''helper for spawndetached, returns the child pid on conversion to string |
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401 |
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402 Does not resolve the child pid immediately because the child may not yet be |
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403 started. |
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404 ''' |
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405 def childpid(self): |
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406 '''returns the child pid of the first found child of the process |
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407 with this pid''' |
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408 return _1stchild(self) |
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409 def __str__(self): |
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410 # run when the pid is written to the file |
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411 ppid = self.childpid() |
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412 if ppid is None: |
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413 # race, child has exited since check |
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414 # fall back to this pid. Its process will also have disappeared, |
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415 # raising the same error type later as when the child pid would |
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416 # be returned. |
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417 return " %d" % self |
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418 return str(ppid) |
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419 |
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420 def spawndetached(args): |
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421 # No standard library function really spawns a fully detached |
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422 # process under win32 because they allocate pipes or other objects |
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423 # to handle standard streams communications. Passing these objects |
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424 # to the child process requires handle inheritance to be enabled |
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425 # which makes really detached processes impossible. |
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426 si = _STARTUPINFO() |
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427 si.cb = ctypes.sizeof(_STARTUPINFO) |
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428 |
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429 pi = _PROCESS_INFORMATION() |
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430 |
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431 env = '' |
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432 for k in encoding.environ: |
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433 env += "%s=%s\0" % (k, encoding.environ[k]) |
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434 if not env: |
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435 env = '\0' |
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436 env += '\0' |
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437 |
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438 args = subprocess.list2cmdline(args) |
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439 # Not running the command in shell mode makes Python 2.6 hang when |
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440 # writing to hgweb output socket. |
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441 comspec = encoding.environ.get("COMSPEC", "cmd.exe") |
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442 args = comspec + " /c " + args |
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443 |
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444 res = _kernel32.CreateProcessA( |
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445 None, args, None, None, False, _CREATE_NO_WINDOW, |
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446 env, pycompat.getcwd(), ctypes.byref(si), ctypes.byref(pi)) |
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447 if not res: |
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448 raise ctypes.WinError() |
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449 |
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450 # _tochildpid because the process is the child of COMSPEC |
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451 return _tochildpid(pi.dwProcessId) |
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452 |
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453 def unlink(f): |
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454 '''try to implement POSIX' unlink semantics on Windows''' |
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455 |
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456 if os.path.isdir(f): |
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457 # use EPERM because it is POSIX prescribed value, even though |
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458 # unlink(2) on directories returns EISDIR on Linux |
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459 raise IOError(errno.EPERM, |
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460 "Unlinking directory not permitted: '%s'" % f) |
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461 |
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462 # POSIX allows to unlink and rename open files. Windows has serious |
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463 # problems with doing that: |
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464 # - Calling os.unlink (or os.rename) on a file f fails if f or any |
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465 # hardlinked copy of f has been opened with Python's open(). There is no |
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466 # way such a file can be deleted or renamed on Windows (other than |
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467 # scheduling the delete or rename for the next reboot). |
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468 # - Calling os.unlink on a file that has been opened with Mercurial's |
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469 # posixfile (or comparable methods) will delay the actual deletion of |
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470 # the file for as long as the file is held open. The filename is blocked |
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471 # during that time and cannot be used for recreating a new file under |
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472 # that same name ("zombie file"). Directories containing such zombie files |
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473 # cannot be removed or moved. |
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474 # A file that has been opened with posixfile can be renamed, so we rename |
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475 # f to a random temporary name before calling os.unlink on it. This allows |
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476 # callers to recreate f immediately while having other readers do their |
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477 # implicit zombie filename blocking on a temporary name. |
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478 |
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479 for tries in xrange(10): |
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480 temp = '%s-%08x' % (f, random.randint(0, 0xffffffff)) |
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481 try: |
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482 os.rename(f, temp) # raises OSError EEXIST if temp exists |
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483 break |
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484 except OSError as e: |
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485 if e.errno != errno.EEXIST: |
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486 raise |
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487 else: |
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488 raise IOError(errno.EEXIST, "No usable temporary filename found") |
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489 |
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490 try: |
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491 os.unlink(temp) |
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492 except OSError: |
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493 # The unlink might have failed because the READONLY attribute may heave |
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494 # been set on the original file. Rename works fine with READONLY set, |
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495 # but not os.unlink. Reset all attributes and try again. |
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496 _kernel32.SetFileAttributesA(temp, _FILE_ATTRIBUTE_NORMAL) |
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497 try: |
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498 os.unlink(temp) |
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499 except OSError: |
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500 # The unlink might have failed due to some very rude AV-Scanners. |
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501 # Leaking a tempfile is the lesser evil than aborting here and |
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502 # leaving some potentially serious inconsistencies. |
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503 pass |
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504 |
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505 def makedir(path, notindexed): |
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506 os.mkdir(path) |
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507 if notindexed: |
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508 _kernel32.SetFileAttributesA(path, _FILE_ATTRIBUTE_NOT_CONTENT_INDEXED) |