author | Nishanth Amuluru <nishanth@fossee.in> |
Sun, 09 Jan 2011 11:13:36 +0530 | |
changeset 114 | 1a88b04adb39 |
parent 69 | c6bca38c1cbf |
permissions | -rw-r--r-- |
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# win32.py - utility functions that use win32 API |
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# |
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# Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others |
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# |
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# This software may be used and distributed according to the terms of the |
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# GNU General Public License version 2 or any later version. |
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|
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"""Utility functions that use win32 API. |
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|
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Mark Hammond's win32all package allows better functionality on |
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Windows. This module overrides definitions in util.py. If not |
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available, import of this module will fail, and generic code will be |
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used. |
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""" |
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|
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import win32api |
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|
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import errno, os, sys, pywintypes, win32con, win32file, win32process |
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import winerror, win32gui, win32console |
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import osutil, encoding |
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from win32com.shell import shell, shellcon |
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|
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def os_link(src, dst): |
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try: |
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win32file.CreateHardLink(dst, src) |
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except pywintypes.error: |
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raise OSError(errno.EINVAL, 'target implements hardlinks improperly') |
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except NotImplementedError: # Another fake error win Win98 |
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raise OSError(errno.EINVAL, 'Hardlinking not supported') |
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def _getfileinfo(pathname): |
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"""Return number of hardlinks for the given file.""" |
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try: |
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fh = win32file.CreateFile(pathname, |
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win32file.GENERIC_READ, win32file.FILE_SHARE_READ, |
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None, win32file.OPEN_EXISTING, 0, None) |
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except pywintypes.error: |
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raise OSError(errno.ENOENT, 'The system cannot find the file specified') |
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try: |
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return win32file.GetFileInformationByHandle(fh) |
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finally: |
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fh.Close() |
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def nlinks(pathname): |
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"""Return number of hardlinks for the given file.""" |
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return _getfileinfo(pathname)[7] |
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def samefile(fpath1, fpath2): |
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"""Returns whether fpath1 and fpath2 refer to the same file. This is only |
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guaranteed to work for files, not directories.""" |
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res1 = _getfileinfo(fpath1) |
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res2 = _getfileinfo(fpath2) |
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# Index 4 is the volume serial number, and 8 and 9 contain the file ID |
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return res1[4] == res2[4] and res1[8] == res2[8] and res1[9] == res2[9] |
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def samedevice(fpath1, fpath2): |
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"""Returns whether fpath1 and fpath2 are on the same device. This is only |
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guaranteed to work for files, not directories.""" |
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res1 = _getfileinfo(fpath1) |
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res2 = _getfileinfo(fpath2) |
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return res1[4] == res2[4] |
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def testpid(pid): |
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'''return True if pid is still running or unable to |
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determine, False otherwise''' |
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try: |
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handle = win32api.OpenProcess( |
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win32con.PROCESS_QUERY_INFORMATION, False, pid) |
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if handle: |
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status = win32process.GetExitCodeProcess(handle) |
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return status == win32con.STILL_ACTIVE |
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except pywintypes.error, details: |
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return details[0] != winerror.ERROR_INVALID_PARAMETER |
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return True |
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def lookup_reg(key, valname=None, scope=None): |
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''' Look up a key/value name in the Windows registry. |
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|
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valname: value name. If unspecified, the default value for the key |
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is used. |
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scope: optionally specify scope for registry lookup, this can be |
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a sequence of scopes to look up in order. Default (CURRENT_USER, |
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83 |
LOCAL_MACHINE). |
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''' |
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try: |
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from _winreg import HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE, \ |
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QueryValueEx, OpenKey |
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88 |
except ImportError: |
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89 |
return None |
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90 |
|
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91 |
if scope is None: |
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92 |
scope = (HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE) |
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93 |
elif not isinstance(scope, (list, tuple)): |
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94 |
scope = (scope,) |
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95 |
for s in scope: |
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96 |
try: |
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97 |
val = QueryValueEx(OpenKey(s, key), valname)[0] |
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98 |
# never let a Unicode string escape into the wild |
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99 |
return encoding.tolocal(val.encode('UTF-8')) |
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100 |
except EnvironmentError: |
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101 |
pass |
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102 |
|
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103 |
def system_rcpath_win32(): |
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104 |
'''return default os-specific hgrc search path''' |
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105 |
filename = win32api.GetModuleFileName(0) |
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106 |
# Use mercurial.ini found in directory with hg.exe |
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107 |
progrc = os.path.join(os.path.dirname(filename), 'mercurial.ini') |
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108 |
if os.path.isfile(progrc): |
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109 |
return [progrc] |
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110 |
# Use hgrc.d found in directory with hg.exe |
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111 |
progrcd = os.path.join(os.path.dirname(filename), 'hgrc.d') |
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112 |
if os.path.isdir(progrcd): |
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113 |
rcpath = [] |
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114 |
for f, kind in osutil.listdir(progrcd): |
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115 |
if f.endswith('.rc'): |
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116 |
rcpath.append(os.path.join(progrcd, f)) |
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117 |
return rcpath |
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118 |
# else look for a system rcpath in the registry |
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119 |
try: |
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120 |
value = win32api.RegQueryValue( |
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121 |
win32con.HKEY_LOCAL_MACHINE, 'SOFTWARE\\Mercurial') |
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122 |
rcpath = [] |
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123 |
for p in value.split(os.pathsep): |
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124 |
if p.lower().endswith('mercurial.ini'): |
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125 |
rcpath.append(p) |
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126 |
elif os.path.isdir(p): |
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127 |
for f, kind in osutil.listdir(p): |
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128 |
if f.endswith('.rc'): |
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129 |
rcpath.append(os.path.join(p, f)) |
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130 |
return rcpath |
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131 |
except pywintypes.error: |
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132 |
return [] |
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133 |
|
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134 |
def user_rcpath_win32(): |
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135 |
'''return os-specific hgrc search path to the user dir''' |
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136 |
userdir = os.path.expanduser('~') |
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137 |
if sys.getwindowsversion()[3] != 2 and userdir == '~': |
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138 |
# We are on win < nt: fetch the APPDATA directory location and use |
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139 |
# the parent directory as the user home dir. |
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140 |
appdir = shell.SHGetPathFromIDList( |
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141 |
shell.SHGetSpecialFolderLocation(0, shellcon.CSIDL_APPDATA)) |
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142 |
userdir = os.path.dirname(appdir) |
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143 |
return [os.path.join(userdir, 'mercurial.ini'), |
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144 |
os.path.join(userdir, '.hgrc')] |
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145 |
|
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146 |
def getuser(): |
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147 |
'''return name of current user''' |
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148 |
return win32api.GetUserName() |
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149 |
|
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150 |
def set_signal_handler_win32(): |
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151 |
"""Register a termination handler for console events including |
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152 |
CTRL+C. python signal handlers do not work well with socket |
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153 |
operations. |
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154 |
""" |
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155 |
def handler(event): |
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156 |
win32process.ExitProcess(1) |
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157 |
win32api.SetConsoleCtrlHandler(handler) |
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158 |
|
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159 |
def hidewindow(): |
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160 |
def callback(*args, **kwargs): |
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161 |
hwnd, pid = args |
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162 |
wpid = win32process.GetWindowThreadProcessId(hwnd)[1] |
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163 |
if pid == wpid: |
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164 |
win32gui.ShowWindow(hwnd, win32con.SW_HIDE) |
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165 |
|
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166 |
pid = win32process.GetCurrentProcessId() |
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167 |
win32gui.EnumWindows(callback, pid) |
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168 |
|
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169 |
def termwidth(): |
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170 |
try: |
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171 |
# Query stderr to avoid problems with redirections |
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172 |
screenbuf = win32console.GetStdHandle(win32console.STD_ERROR_HANDLE) |
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173 |
try: |
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|
174 |
window = screenbuf.GetConsoleScreenBufferInfo()['Window'] |
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|
175 |
width = window.Right - window.Left |
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176 |
return width |
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177 |
finally: |
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|
178 |
screenbuf.Detach() |
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179 |
except pywintypes.error: |
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180 |
return 79 |