80 lines
2.4 KiB
Python
80 lines
2.4 KiB
Python
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import py
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import errno
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class Error(EnvironmentError):
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__module__ = 'py.error'
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def __repr__(self):
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return "%s.%s %r: %s " %(self.__class__.__module__,
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self.__class__.__name__,
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self.__class__.__doc__,
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" ".join(map(str, self.args)),
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#repr(self.args)
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)
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def __str__(self):
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return "[%s]: %s" %(self.__class__.__doc__,
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" ".join(map(str, self.args)),
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)
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_winerrnomap = {
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2: errno.ENOENT,
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3: errno.ENOENT,
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17: errno.EEXIST,
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22: errno.ENOTDIR,
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267: errno.ENOTDIR,
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5: errno.EACCES, # anything better?
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}
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# note: 'py.std' may not be imported yet at all, because
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# the 'error' module in this file is imported very early.
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# This is dependent on dict order.
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ModuleType = type(py)
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class py_error(ModuleType):
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""" py.error lazily provides higher level Exception classes
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for each possible POSIX errno (as defined per
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the 'errno' module. All such Exceptions derive
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from py.error.Error, which itself is a subclass
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of EnvironmentError.
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"""
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Error = Error
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def _getwinerrnoclass(cls, eno):
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return cls._geterrnoclass(_winerrnomap[eno])
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_getwinerrnoclass = classmethod(_getwinerrnoclass)
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def _geterrnoclass(eno, _errno2class = {}):
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try:
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return _errno2class[eno]
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except KeyError:
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clsname = py.std.errno.errorcode.get(eno, "UnknownErrno%d" %(eno,))
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cls = type(Error)(clsname, (Error,),
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{'__module__':'py.error',
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'__doc__': py.std.os.strerror(eno)})
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_errno2class[eno] = cls
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return cls
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_geterrnoclass = staticmethod(_geterrnoclass)
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def __getattr__(self, name):
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eno = getattr(py.std.errno, name)
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cls = self._geterrnoclass(eno)
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setattr(self, name, cls)
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return cls
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def getdict(self, done=[]):
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try:
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return done[0]
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except IndexError:
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for name in py.std.errno.errorcode.values():
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hasattr(self, name) # force attribute to be loaded, ignore errors
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dictdescr = ModuleType.__dict__['__dict__']
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done.append(dictdescr.__get__(self))
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return done[0]
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__dict__ = property(getdict)
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del getdict
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error = py_error('py.error', py_error.__doc__)
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