Mercurial > hg
annotate mercurial/win32.py @ 28359:f6b5b041c6c9
commit: block amend while histedit is in progress (issue4800)
author | timeless <timeless@mozdev.org> |
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date | Sun, 14 Feb 2016 07:35:50 +0000 |
parents | d6beeb618700 |
children | 392633d7860e |
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 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 _kernel32 = ctypes.windll.kernel32 |
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18 _advapi32 = ctypes.windll.advapi32 |
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19 _user32 = ctypes.windll.user32 |
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20 |
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21 _BOOL = ctypes.c_long |
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22 _WORD = ctypes.c_ushort |
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23 _DWORD = ctypes.c_ulong |
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24 _UINT = ctypes.c_uint |
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25 _LONG = ctypes.c_long |
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26 _LPCSTR = _LPSTR = ctypes.c_char_p |
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27 _HANDLE = ctypes.c_void_p |
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28 _HWND = _HANDLE |
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29 |
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30 _INVALID_HANDLE_VALUE = _HANDLE(-1).value |
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31 |
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32 # GetLastError |
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33 _ERROR_SUCCESS = 0 |
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34 _ERROR_NO_MORE_FILES = 18 |
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35 _ERROR_INVALID_PARAMETER = 87 |
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36 _ERROR_BROKEN_PIPE = 109 |
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37 _ERROR_INSUFFICIENT_BUFFER = 122 |
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38 |
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39 # WPARAM is defined as UINT_PTR (unsigned type) |
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40 # LPARAM is defined as LONG_PTR (signed type) |
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41 if ctypes.sizeof(ctypes.c_long) == ctypes.sizeof(ctypes.c_void_p): |
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42 _WPARAM = ctypes.c_ulong |
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43 _LPARAM = ctypes.c_long |
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44 elif ctypes.sizeof(ctypes.c_longlong) == ctypes.sizeof(ctypes.c_void_p): |
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45 _WPARAM = ctypes.c_ulonglong |
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46 _LPARAM = ctypes.c_longlong |
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47 |
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48 class _FILETIME(ctypes.Structure): |
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49 _fields_ = [('dwLowDateTime', _DWORD), |
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50 ('dwHighDateTime', _DWORD)] |
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51 |
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52 class _BY_HANDLE_FILE_INFORMATION(ctypes.Structure): |
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53 _fields_ = [('dwFileAttributes', _DWORD), |
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54 ('ftCreationTime', _FILETIME), |
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55 ('ftLastAccessTime', _FILETIME), |
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56 ('ftLastWriteTime', _FILETIME), |
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57 ('dwVolumeSerialNumber', _DWORD), |
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58 ('nFileSizeHigh', _DWORD), |
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59 ('nFileSizeLow', _DWORD), |
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60 ('nNumberOfLinks', _DWORD), |
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61 ('nFileIndexHigh', _DWORD), |
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62 ('nFileIndexLow', _DWORD)] |
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63 |
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64 # CreateFile |
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65 _FILE_SHARE_READ = 0x00000001 |
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66 _FILE_SHARE_WRITE = 0x00000002 |
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67 _FILE_SHARE_DELETE = 0x00000004 |
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68 |
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69 _OPEN_EXISTING = 3 |
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70 |
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71 _FILE_FLAG_BACKUP_SEMANTICS = 0x02000000 |
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72 |
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73 # SetFileAttributes |
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74 _FILE_ATTRIBUTE_NORMAL = 0x80 |
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75 _FILE_ATTRIBUTE_NOT_CONTENT_INDEXED = 0x2000 |
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76 |
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77 # Process Security and Access Rights |
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78 _PROCESS_QUERY_INFORMATION = 0x0400 |
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79 |
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80 # GetExitCodeProcess |
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81 _STILL_ACTIVE = 259 |
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82 |
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83 class _STARTUPINFO(ctypes.Structure): |
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84 _fields_ = [('cb', _DWORD), |
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85 ('lpReserved', _LPSTR), |
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86 ('lpDesktop', _LPSTR), |
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87 ('lpTitle', _LPSTR), |
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88 ('dwX', _DWORD), |
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89 ('dwY', _DWORD), |
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90 ('dwXSize', _DWORD), |
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91 ('dwYSize', _DWORD), |
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92 ('dwXCountChars', _DWORD), |
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93 ('dwYCountChars', _DWORD), |
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94 ('dwFillAttribute', _DWORD), |
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95 ('dwFlags', _DWORD), |
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96 ('wShowWindow', _WORD), |
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97 ('cbReserved2', _WORD), |
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98 ('lpReserved2', ctypes.c_char_p), |
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99 ('hStdInput', _HANDLE), |
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100 ('hStdOutput', _HANDLE), |
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101 ('hStdError', _HANDLE)] |
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102 |
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103 class _PROCESS_INFORMATION(ctypes.Structure): |
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104 _fields_ = [('hProcess', _HANDLE), |
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105 ('hThread', _HANDLE), |
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106 ('dwProcessId', _DWORD), |
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107 ('dwThreadId', _DWORD)] |
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108 |
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109 _CREATE_NO_WINDOW = 0x08000000 |
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110 _SW_HIDE = 0 |
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111 |
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112 class _COORD(ctypes.Structure): |
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113 _fields_ = [('X', ctypes.c_short), |
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114 ('Y', ctypes.c_short)] |
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115 |
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116 class _SMALL_RECT(ctypes.Structure): |
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117 _fields_ = [('Left', ctypes.c_short), |
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118 ('Top', ctypes.c_short), |
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119 ('Right', ctypes.c_short), |
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120 ('Bottom', ctypes.c_short)] |
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121 |
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122 class _CONSOLE_SCREEN_BUFFER_INFO(ctypes.Structure): |
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123 _fields_ = [('dwSize', _COORD), |
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124 ('dwCursorPosition', _COORD), |
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125 ('wAttributes', _WORD), |
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126 ('srWindow', _SMALL_RECT), |
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127 ('dwMaximumWindowSize', _COORD)] |
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128 |
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129 _STD_ERROR_HANDLE = _DWORD(-12).value |
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130 |
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131 # CreateToolhelp32Snapshot, Process32First, Process32Next |
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132 _TH32CS_SNAPPROCESS = 0x00000002 |
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133 _MAX_PATH = 260 |
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134 |
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135 class _tagPROCESSENTRY32(ctypes.Structure): |
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136 _fields_ = [('dwsize', _DWORD), |
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137 ('cntUsage', _DWORD), |
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138 ('th32ProcessID', _DWORD), |
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139 ('th32DefaultHeapID', ctypes.c_void_p), |
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140 ('th32ModuleID', _DWORD), |
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141 ('cntThreads', _DWORD), |
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142 ('th32ParentProcessID', _DWORD), |
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143 ('pcPriClassBase', _LONG), |
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144 ('dwFlags', _DWORD), |
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145 ('szExeFile', ctypes.c_char * _MAX_PATH)] |
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146 |
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147 def __init__(self): |
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148 super(_tagPROCESSENTRY32, self).__init__() |
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149 self.dwsize = ctypes.sizeof(self) |
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150 |
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151 |
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152 # types of parameters of C functions used (required by pypy) |
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153 |
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154 _kernel32.CreateFileA.argtypes = [_LPCSTR, _DWORD, _DWORD, ctypes.c_void_p, |
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155 _DWORD, _DWORD, _HANDLE] |
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156 _kernel32.CreateFileA.restype = _HANDLE |
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157 |
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158 _kernel32.GetFileInformationByHandle.argtypes = [_HANDLE, ctypes.c_void_p] |
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159 _kernel32.GetFileInformationByHandle.restype = _BOOL |
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160 |
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161 _kernel32.CloseHandle.argtypes = [_HANDLE] |
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162 _kernel32.CloseHandle.restype = _BOOL |
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163 |
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164 try: |
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165 _kernel32.CreateHardLinkA.argtypes = [_LPCSTR, _LPCSTR, ctypes.c_void_p] |
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166 _kernel32.CreateHardLinkA.restype = _BOOL |
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167 except AttributeError: |
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168 pass |
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169 |
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170 _kernel32.SetFileAttributesA.argtypes = [_LPCSTR, _DWORD] |
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171 _kernel32.SetFileAttributesA.restype = _BOOL |
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172 |
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173 _kernel32.OpenProcess.argtypes = [_DWORD, _BOOL, _DWORD] |
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174 _kernel32.OpenProcess.restype = _HANDLE |
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175 |
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176 _kernel32.GetExitCodeProcess.argtypes = [_HANDLE, ctypes.c_void_p] |
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177 _kernel32.GetExitCodeProcess.restype = _BOOL |
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178 |
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179 _kernel32.GetLastError.argtypes = [] |
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180 _kernel32.GetLastError.restype = _DWORD |
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181 |
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182 _kernel32.GetModuleFileNameA.argtypes = [_HANDLE, ctypes.c_void_p, _DWORD] |
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183 _kernel32.GetModuleFileNameA.restype = _DWORD |
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184 |
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185 _kernel32.CreateProcessA.argtypes = [_LPCSTR, _LPCSTR, ctypes.c_void_p, |
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186 ctypes.c_void_p, _BOOL, _DWORD, ctypes.c_void_p, _LPCSTR, ctypes.c_void_p, |
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187 ctypes.c_void_p] |
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188 _kernel32.CreateProcessA.restype = _BOOL |
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189 |
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190 _kernel32.ExitProcess.argtypes = [_UINT] |
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191 _kernel32.ExitProcess.restype = None |
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192 |
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193 _kernel32.GetCurrentProcessId.argtypes = [] |
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194 _kernel32.GetCurrentProcessId.restype = _DWORD |
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195 |
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196 _SIGNAL_HANDLER = ctypes.WINFUNCTYPE(_BOOL, _DWORD) |
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197 _kernel32.SetConsoleCtrlHandler.argtypes = [_SIGNAL_HANDLER, _BOOL] |
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198 _kernel32.SetConsoleCtrlHandler.restype = _BOOL |
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199 |
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200 _kernel32.GetStdHandle.argtypes = [_DWORD] |
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201 _kernel32.GetStdHandle.restype = _HANDLE |
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202 |
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203 _kernel32.GetConsoleScreenBufferInfo.argtypes = [_HANDLE, ctypes.c_void_p] |
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204 _kernel32.GetConsoleScreenBufferInfo.restype = _BOOL |
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205 |
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206 _advapi32.GetUserNameA.argtypes = [ctypes.c_void_p, ctypes.c_void_p] |
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207 _advapi32.GetUserNameA.restype = _BOOL |
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208 |
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209 _user32.GetWindowThreadProcessId.argtypes = [_HANDLE, ctypes.c_void_p] |
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210 _user32.GetWindowThreadProcessId.restype = _DWORD |
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211 |
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212 _user32.ShowWindow.argtypes = [_HANDLE, ctypes.c_int] |
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213 _user32.ShowWindow.restype = _BOOL |
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214 |
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215 _WNDENUMPROC = ctypes.WINFUNCTYPE(_BOOL, _HWND, _LPARAM) |
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216 _user32.EnumWindows.argtypes = [_WNDENUMPROC, _LPARAM] |
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217 _user32.EnumWindows.restype = _BOOL |
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218 |
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219 _kernel32.CreateToolhelp32Snapshot.argtypes = [_DWORD, _DWORD] |
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220 _kernel32.CreateToolhelp32Snapshot.restype = _BOOL |
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221 |
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222 _kernel32.PeekNamedPipe.argtypes = [_HANDLE, ctypes.c_void_p, _DWORD, |
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223 ctypes.c_void_p, ctypes.c_void_p, ctypes.c_void_p] |
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224 _kernel32.PeekNamedPipe.restype = _BOOL |
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225 |
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226 _kernel32.Process32First.argtypes = [_HANDLE, ctypes.c_void_p] |
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227 _kernel32.Process32First.restype = _BOOL |
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228 |
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229 _kernel32.Process32Next.argtypes = [_HANDLE, ctypes.c_void_p] |
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230 _kernel32.Process32Next.restype = _BOOL |
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231 |
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232 def _raiseoserror(name): |
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233 err = ctypes.WinError() |
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234 raise OSError(err.errno, '%s: %s' % (name, err.strerror)) |
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235 |
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236 def _getfileinfo(name): |
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237 fh = _kernel32.CreateFileA(name, 0, |
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238 _FILE_SHARE_READ | _FILE_SHARE_WRITE | _FILE_SHARE_DELETE, |
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239 None, _OPEN_EXISTING, _FILE_FLAG_BACKUP_SEMANTICS, None) |
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240 if fh == _INVALID_HANDLE_VALUE: |
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241 _raiseoserror(name) |
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242 try: |
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243 fi = _BY_HANDLE_FILE_INFORMATION() |
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244 if not _kernel32.GetFileInformationByHandle(fh, ctypes.byref(fi)): |
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245 _raiseoserror(name) |
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246 return fi |
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247 finally: |
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248 _kernel32.CloseHandle(fh) |
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249 |
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250 def oslink(src, dst): |
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251 try: |
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252 if not _kernel32.CreateHardLinkA(dst, src, None): |
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253 _raiseoserror(src) |
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254 except AttributeError: # Wine doesn't support this function |
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255 _raiseoserror(src) |
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256 |
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257 def nlinks(name): |
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258 '''return number of hardlinks for the given file''' |
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259 return _getfileinfo(name).nNumberOfLinks |
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260 |
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261 def samefile(path1, path2): |
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262 '''Returns whether path1 and path2 refer to the same file or directory.''' |
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263 res1 = _getfileinfo(path1) |
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264 res2 = _getfileinfo(path2) |
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265 return (res1.dwVolumeSerialNumber == res2.dwVolumeSerialNumber |
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266 and res1.nFileIndexHigh == res2.nFileIndexHigh |
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267 and res1.nFileIndexLow == res2.nFileIndexLow) |
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268 |
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269 def samedevice(path1, path2): |
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270 '''Returns whether path1 and path2 are on the same device.''' |
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271 res1 = _getfileinfo(path1) |
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272 res2 = _getfileinfo(path2) |
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273 return res1.dwVolumeSerialNumber == res2.dwVolumeSerialNumber |
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274 |
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275 def peekpipe(pipe): |
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276 handle = msvcrt.get_osfhandle(pipe.fileno()) |
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277 avail = _DWORD() |
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278 |
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279 if not _kernel32.PeekNamedPipe(handle, None, 0, None, ctypes.byref(avail), |
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280 None): |
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281 err = _kernel32.GetLastError() |
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282 if err == _ERROR_BROKEN_PIPE: |
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283 return 0 |
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284 raise ctypes.WinError(err) |
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285 |
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286 return avail.value |
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287 |
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288 def testpid(pid): |
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289 '''return True if pid is still running or unable to |
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290 determine, False otherwise''' |
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291 h = _kernel32.OpenProcess(_PROCESS_QUERY_INFORMATION, False, pid) |
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292 if h: |
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293 try: |
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294 status = _DWORD() |
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295 if _kernel32.GetExitCodeProcess(h, ctypes.byref(status)): |
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296 return status.value == _STILL_ACTIVE |
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297 finally: |
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298 _kernel32.CloseHandle(h) |
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299 return _kernel32.GetLastError() != _ERROR_INVALID_PARAMETER |
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300 |
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301 def executablepath(): |
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302 '''return full path of hg.exe''' |
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303 size = 600 |
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304 buf = ctypes.create_string_buffer(size + 1) |
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305 len = _kernel32.GetModuleFileNameA(None, ctypes.byref(buf), size) |
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306 if len == 0: |
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307 raise ctypes.WinError() # Note: WinError is a function |
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308 elif len == size: |
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309 raise ctypes.WinError(_ERROR_INSUFFICIENT_BUFFER) |
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310 return buf.value |
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311 |
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312 def getuser(): |
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313 '''return name of current user''' |
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314 size = _DWORD(300) |
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315 buf = ctypes.create_string_buffer(size.value + 1) |
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316 if not _advapi32.GetUserNameA(ctypes.byref(buf), ctypes.byref(size)): |
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317 raise ctypes.WinError() |
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318 return buf.value |
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319 |
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320 _signalhandler = [] |
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321 |
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322 def setsignalhandler(): |
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323 '''Register a termination handler for console events including |
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324 CTRL+C. python signal handlers do not work well with socket |
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325 operations. |
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326 ''' |
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327 def handler(event): |
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328 _kernel32.ExitProcess(1) |
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329 |
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330 if _signalhandler: |
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331 return # already registered |
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332 h = _SIGNAL_HANDLER(handler) |
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333 _signalhandler.append(h) # needed to prevent garbage collection |
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334 if not _kernel32.SetConsoleCtrlHandler(h, True): |
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335 raise ctypes.WinError() |
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336 |
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337 def hidewindow(): |
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338 |
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339 def callback(hwnd, pid): |
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340 wpid = _DWORD() |
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341 _user32.GetWindowThreadProcessId(hwnd, ctypes.byref(wpid)) |
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342 if pid == wpid.value: |
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343 _user32.ShowWindow(hwnd, _SW_HIDE) |
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344 return False # stop enumerating windows |
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345 return True |
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346 |
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347 pid = _kernel32.GetCurrentProcessId() |
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348 _user32.EnumWindows(_WNDENUMPROC(callback), pid) |
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349 |
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350 def termwidth(): |
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351 # cmd.exe does not handle CR like a unix console, the CR is |
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352 # counted in the line length. On 80 columns consoles, if 80 |
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353 # characters are written, the following CR won't apply on the |
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354 # current line but on the new one. Keep room for it. |
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355 width = 79 |
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356 # Query stderr to avoid problems with redirections |
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357 screenbuf = _kernel32.GetStdHandle( |
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358 _STD_ERROR_HANDLE) # don't close the handle returned |
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359 if screenbuf is None or screenbuf == _INVALID_HANDLE_VALUE: |
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360 return width |
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361 csbi = _CONSOLE_SCREEN_BUFFER_INFO() |
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362 if not _kernel32.GetConsoleScreenBufferInfo( |
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363 screenbuf, ctypes.byref(csbi)): |
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364 return width |
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365 width = csbi.srWindow.Right - csbi.srWindow.Left |
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366 return width |
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367 |
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368 def _1stchild(pid): |
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369 '''return the 1st found child of the given pid |
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370 |
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371 None is returned when no child is found''' |
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372 pe = _tagPROCESSENTRY32() |
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373 |
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374 # create handle to list all processes |
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375 ph = _kernel32.CreateToolhelp32Snapshot(_TH32CS_SNAPPROCESS, 0) |
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376 if ph == _INVALID_HANDLE_VALUE: |
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377 raise ctypes.WinError() |
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378 try: |
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379 r = _kernel32.Process32First(ph, ctypes.byref(pe)) |
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380 # loop over all processes |
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381 while r: |
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382 if pe.th32ParentProcessID == pid: |
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383 # return first child found |
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384 return pe.th32ProcessID |
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385 r = _kernel32.Process32Next(ph, ctypes.byref(pe)) |
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386 finally: |
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387 _kernel32.CloseHandle(ph) |
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388 if _kernel32.GetLastError() != _ERROR_NO_MORE_FILES: |
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389 raise ctypes.WinError() |
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390 return None # no child found |
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391 |
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392 class _tochildpid(int): # pid is _DWORD, which always matches in an int |
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393 '''helper for spawndetached, returns the child pid on conversion to string |
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394 |
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395 Does not resolve the child pid immediately because the child may not yet be |
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396 started. |
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397 ''' |
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398 def childpid(self): |
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399 '''returns the child pid of the first found child of the process |
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400 with this pid''' |
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401 return _1stchild(self) |
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402 def __str__(self): |
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403 # run when the pid is written to the file |
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404 ppid = self.childpid() |
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405 if ppid is None: |
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406 # race, child has exited since check |
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407 # fall back to this pid. Its process will also have disappeared, |
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408 # raising the same error type later as when the child pid would |
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409 # be returned. |
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410 return " %d" % self |
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411 return str(ppid) |
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412 |
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413 def spawndetached(args): |
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414 # No standard library function really spawns a fully detached |
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415 # process under win32 because they allocate pipes or other objects |
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416 # to handle standard streams communications. Passing these objects |
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417 # to the child process requires handle inheritance to be enabled |
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418 # which makes really detached processes impossible. |
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419 si = _STARTUPINFO() |
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420 si.cb = ctypes.sizeof(_STARTUPINFO) |
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421 |
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422 pi = _PROCESS_INFORMATION() |
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423 |
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424 env = '' |
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425 for k in os.environ: |
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426 env += "%s=%s\0" % (k, os.environ[k]) |
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427 if not env: |
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428 env = '\0' |
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429 env += '\0' |
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430 |
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431 args = subprocess.list2cmdline(args) |
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432 # Not running the command in shell mode makes Python 2.6 hang when |
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433 # writing to hgweb output socket. |
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434 comspec = os.environ.get("COMSPEC", "cmd.exe") |
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435 args = comspec + " /c " + args |
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436 |
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437 res = _kernel32.CreateProcessA( |
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438 None, args, None, None, False, _CREATE_NO_WINDOW, |
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439 env, os.getcwd(), ctypes.byref(si), ctypes.byref(pi)) |
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440 if not res: |
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win32: 'raise ctypes.WinError' -> 'raise ctypes.WinError()'
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441 raise ctypes.WinError() |
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442 |
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win32: spawndetached returns pid of detached process and not of cmd.exe
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443 # _tochildpid because the process is the child of COMSPEC |
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444 return _tochildpid(pi.dwProcessId) |
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windows: move unlink to win32.py
Adrian Buehlmann <adrian@cadifra.com>
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445 |
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446 def unlink(f): |
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447 '''try to implement POSIX' unlink semantics on Windows''' |
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448 |
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449 if os.path.isdir(f): |
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450 # use EPERM because it is POSIX prescribed value, even though |
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451 # unlink(2) on directories returns EISDIR on Linux |
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452 raise IOError(errno.EPERM, |
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453 "Unlinking directory not permitted: '%s'" % f) |
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windows: check target type before actual unlinking to follow POSIX semantics
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454 |
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455 # POSIX allows to unlink and rename open files. Windows has serious |
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456 # problems with doing that: |
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457 # - Calling os.unlink (or os.rename) on a file f fails if f or any |
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458 # hardlinked copy of f has been opened with Python's open(). There is no |
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459 # way such a file can be deleted or renamed on Windows (other than |
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460 # scheduling the delete or rename for the next reboot). |
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461 # - Calling os.unlink on a file that has been opened with Mercurial's |
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462 # posixfile (or comparable methods) will delay the actual deletion of |
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463 # the file for as long as the file is held open. The filename is blocked |
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464 # during that time and cannot be used for recreating a new file under |
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465 # that same name ("zombie file"). Directories containing such zombie files |
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466 # cannot be removed or moved. |
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467 # A file that has been opened with posixfile can be renamed, so we rename |
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468 # f to a random temporary name before calling os.unlink on it. This allows |
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469 # callers to recreate f immediately while having other readers do their |
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470 # implicit zombie filename blocking on a temporary name. |
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471 |
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472 for tries in xrange(10): |
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473 temp = '%s-%08x' % (f, random.randint(0, 0xffffffff)) |
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474 try: |
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475 os.rename(f, temp) # raises OSError EEXIST if temp exists |
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476 break |
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global: mass rewrite to use modern exception syntax
Gregory Szorc <gregory.szorc@gmail.com>
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477 except OSError as e: |
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478 if e.errno != errno.EEXIST: |
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479 raise |
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480 else: |
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win32: clean up use of two-argument raise
Augie Fackler <raf@durin42.com>
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481 raise IOError(errno.EEXIST, "No usable temporary filename found") |
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482 |
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483 try: |
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484 os.unlink(temp) |
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485 except OSError: |
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486 # The unlink might have failed because the READONLY attribute may heave |
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487 # been set on the original file. Rename works fine with READONLY set, |
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488 # but not os.unlink. Reset all attributes and try again. |
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489 _kernel32.SetFileAttributesA(temp, _FILE_ATTRIBUTE_NORMAL) |
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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 due to some very rude AV-Scanners. |
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494 # Leaking a tempfile is the lesser evil than aborting here and |
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495 # leaving some potentially serious inconsistencies. |
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496 pass |
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set NOT_CONTENT_INDEXED on .hg dir (issue2694)
Adrian Buehlmann <adrian@cadifra.com>
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497 |
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set NOT_CONTENT_INDEXED on .hg dir (issue2694)
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498 def makedir(path, notindexed): |
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499 os.mkdir(path) |
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500 if notindexed: |
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501 _kernel32.SetFileAttributesA(path, _FILE_ATTRIBUTE_NOT_CONTENT_INDEXED) |