win32.py
204 lines
| 7.1 KiB
| text/x-python
|
PythonLexer
/ mercurial / win32.py
Martin Geisler
|
r8226 | # win32.py - utility functions that use win32 API | ||
# | ||||
# Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others | ||||
# | ||||
# This software may be used and distributed according to the terms of the | ||||
Matt Mackall
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r10263 | # GNU General Public License version 2 or any later version. | ||
Martin Geisler
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r8227 | |||
"""Utility functions that use win32 API. | ||||
Mark Hammond's win32all package allows better functionality on | ||||
Windows. This module overrides definitions in util.py. If not | ||||
available, import of this module will fail, and generic code will be | ||||
used. | ||||
""" | ||||
Matt Mackall
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r7890 | |||
import win32api | ||||
import errno, os, sys, pywintypes, win32con, win32file, win32process | ||||
Patrick Mezard
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r11012 | import winerror, win32gui, win32console | ||
Matt Mackall
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r7948 | import osutil, encoding | ||
Martin Geisler
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r9198 | from win32com.shell import shell, shellcon | ||
Matt Mackall
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r7890 | |||
def os_link(src, dst): | ||||
try: | ||||
win32file.CreateHardLink(dst, src) | ||||
# CreateHardLink sometimes succeeds on mapped drives but | ||||
# following nlinks() returns 1. Check it now and bail out. | ||||
if nlinks(src) < 2: | ||||
try: | ||||
win32file.DeleteFile(dst) | ||||
except: | ||||
pass | ||||
# Fake hardlinking error | ||||
Henrik Stuart
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r8951 | raise OSError(errno.EINVAL, 'Hardlinking not supported') | ||
Matt Mackall
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r7890 | except pywintypes.error, details: | ||
Henrik Stuart
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r8951 | raise OSError(errno.EINVAL, 'target implements hardlinks improperly') | ||
Matt Mackall
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r7890 | except NotImplementedError: # Another fake error win Win98 | ||
Henrik Stuart
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r8951 | raise OSError(errno.EINVAL, 'Hardlinking not supported') | ||
Matt Mackall
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r7890 | |||
Siddharth Agarwal
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r10218 | def _getfileinfo(pathname): | ||
Matt Mackall
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r7890 | """Return number of hardlinks for the given file.""" | ||
try: | ||||
fh = win32file.CreateFile(pathname, | ||||
win32file.GENERIC_READ, win32file.FILE_SHARE_READ, | ||||
None, win32file.OPEN_EXISTING, 0, None) | ||||
Patrick Mezard
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r10219 | try: | ||
return win32file.GetFileInformationByHandle(fh) | ||||
finally: | ||||
fh.Close() | ||||
Matt Mackall
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r7890 | except pywintypes.error: | ||
Siddharth Agarwal
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r10218 | return None | ||
def nlinks(pathname): | ||||
"""Return number of hardlinks for the given file.""" | ||||
res = _getfileinfo(pathname) | ||||
if res is not None: | ||||
return res[7] | ||||
else: | ||||
Matt Mackall
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r7890 | return os.lstat(pathname).st_nlink | ||
Siddharth Agarwal
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r10218 | def samefile(fpath1, fpath2): | ||
"""Returns whether fpath1 and fpath2 refer to the same file. This is only | ||||
guaranteed to work for files, not directories.""" | ||||
res1 = _getfileinfo(fpath1) | ||||
res2 = _getfileinfo(fpath2) | ||||
if res1 is not None and res2 is not None: | ||||
# Index 4 is the volume serial number, and 8 and 9 contain the file ID | ||||
return res1[4] == res2[4] and res1[8] == res2[8] and res1[9] == res2[9] | ||||
else: | ||||
return False | ||||
def samedevice(fpath1, fpath2): | ||||
"""Returns whether fpath1 and fpath2 are on the same device. This is only | ||||
guaranteed to work for files, not directories.""" | ||||
res1 = _getfileinfo(fpath1) | ||||
res2 = _getfileinfo(fpath2) | ||||
if res1 is not None and res2 is not None: | ||||
return res1[4] == res2[4] | ||||
else: | ||||
return False | ||||
Matt Mackall
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r7890 | def testpid(pid): | ||
'''return True if pid is still running or unable to | ||||
determine, False otherwise''' | ||||
try: | ||||
handle = win32api.OpenProcess( | ||||
win32con.PROCESS_QUERY_INFORMATION, False, pid) | ||||
if handle: | ||||
status = win32process.GetExitCodeProcess(handle) | ||||
return status == win32con.STILL_ACTIVE | ||||
except pywintypes.error, details: | ||||
return details[0] != winerror.ERROR_INVALID_PARAMETER | ||||
return True | ||||
def lookup_reg(key, valname=None, scope=None): | ||||
''' Look up a key/value name in the Windows registry. | ||||
valname: value name. If unspecified, the default value for the key | ||||
is used. | ||||
scope: optionally specify scope for registry lookup, this can be | ||||
a sequence of scopes to look up in order. Default (CURRENT_USER, | ||||
LOCAL_MACHINE). | ||||
''' | ||||
try: | ||||
from _winreg import HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE, \ | ||||
QueryValueEx, OpenKey | ||||
except ImportError: | ||||
return None | ||||
if scope is None: | ||||
scope = (HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE) | ||||
elif not isinstance(scope, (list, tuple)): | ||||
scope = (scope,) | ||||
for s in scope: | ||||
try: | ||||
val = QueryValueEx(OpenKey(s, key), valname)[0] | ||||
# never let a Unicode string escape into the wild | ||||
Matt Mackall
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r7948 | return encoding.tolocal(val.encode('UTF-8')) | ||
Matt Mackall
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r7890 | except EnvironmentError: | ||
pass | ||||
def system_rcpath_win32(): | ||||
'''return default os-specific hgrc search path''' | ||||
proc = win32api.GetCurrentProcess() | ||||
try: | ||||
# This will fail on windows < NT | ||||
filename = win32process.GetModuleFileNameEx(proc, 0) | ||||
except: | ||||
filename = win32api.GetModuleFileName(0) | ||||
# Use mercurial.ini found in directory with hg.exe | ||||
progrc = os.path.join(os.path.dirname(filename), 'mercurial.ini') | ||||
if os.path.isfile(progrc): | ||||
return [progrc] | ||||
Steve Borho
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r10388 | # Use hgrc.d found in directory with hg.exe | ||
progrcd = os.path.join(os.path.dirname(filename), 'hgrc.d') | ||||
if os.path.isdir(progrcd): | ||||
rcpath = [] | ||||
for f, kind in osutil.listdir(progrcd): | ||||
if f.endswith('.rc'): | ||||
rcpath.append(os.path.join(progrcd, f)) | ||||
return rcpath | ||||
Matt Mackall
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r7890 | # else look for a system rcpath in the registry | ||
try: | ||||
value = win32api.RegQueryValue( | ||||
win32con.HKEY_LOCAL_MACHINE, 'SOFTWARE\\Mercurial') | ||||
rcpath = [] | ||||
for p in value.split(os.pathsep): | ||||
if p.lower().endswith('mercurial.ini'): | ||||
rcpath.append(p) | ||||
elif os.path.isdir(p): | ||||
for f, kind in osutil.listdir(p): | ||||
if f.endswith('.rc'): | ||||
rcpath.append(os.path.join(p, f)) | ||||
return rcpath | ||||
except pywintypes.error: | ||||
return [] | ||||
def user_rcpath_win32(): | ||||
'''return os-specific hgrc search path to the user dir''' | ||||
userdir = os.path.expanduser('~') | ||||
if sys.getwindowsversion()[3] != 2 and userdir == '~': | ||||
# We are on win < nt: fetch the APPDATA directory location and use | ||||
# the parent directory as the user home dir. | ||||
appdir = shell.SHGetPathFromIDList( | ||||
shell.SHGetSpecialFolderLocation(0, shellcon.CSIDL_APPDATA)) | ||||
userdir = os.path.dirname(appdir) | ||||
return [os.path.join(userdir, 'mercurial.ini'), | ||||
os.path.join(userdir, '.hgrc')] | ||||
def getuser(): | ||||
'''return name of current user''' | ||||
return win32api.GetUserName() | ||||
def set_signal_handler_win32(): | ||||
"""Register a termination handler for console events including | ||||
CTRL+C. python signal handlers do not work well with socket | ||||
operations. | ||||
""" | ||||
def handler(event): | ||||
win32process.ExitProcess(1) | ||||
win32api.SetConsoleCtrlHandler(handler) | ||||
Patrick Mezard
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r10240 | def hidewindow(): | ||
def callback(*args, **kwargs): | ||||
hwnd, pid = args | ||||
wpid = win32process.GetWindowThreadProcessId(hwnd)[1] | ||||
if pid == wpid: | ||||
win32gui.ShowWindow(hwnd, win32con.SW_HIDE) | ||||
pid = win32process.GetCurrentProcessId() | ||||
win32gui.EnumWindows(callback, pid) | ||||
Patrick Mezard
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r11012 | |||
def termwidth_(): | ||||
try: | ||||
# Query stderr to avoid problems with redirections | ||||
screenbuf = win32console.GetStdHandle(win32console.STD_ERROR_HANDLE) | ||||
try: | ||||
window = screenbuf.GetConsoleScreenBufferInfo()['Window'] | ||||
width = window.Right - window.Left | ||||
return width | ||||
finally: | ||||
screenbuf.Detach() | ||||
except pywintypes.error: | ||||
return 79 | ||||