bpo-39395: putenv() and unsetenv() always available (GH-18135)
The os.putenv() and os.unsetenv() functions are now always available. On non-Windows platforms, Python now requires setenv() and unsetenv() functions to build. Remove putenv_dict from posixmodule.c: it's not longer needed.
This commit is contained in:
Victor Stinner
GitHub
parent
161e7b36b1
commit
b8d1262e8a
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@ -111,9 +111,9 @@ process and user.
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to the environment made after this time are not reflected in ``os.environ``,
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except for changes made by modifying ``os.environ`` directly.
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If the platform supports the :func:`putenv` function, this mapping may be used
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to modify the environment as well as query the environment. :func:`putenv` will
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be called automatically when the mapping is modified.
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This mapping may be used to modify the environment as well as query the
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environment. :func:`putenv` will be called automatically when the mapping
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is modified.
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On Unix, keys and values use :func:`sys.getfilesystemencoding` and
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``'surrogateescape'`` error handler. Use :data:`environb` if you would like
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@ -130,14 +130,10 @@ process and user.
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cause memory leaks. Refer to the system documentation for
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:c:func:`putenv`.
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If :func:`putenv` is not provided, a modified copy of this mapping may be
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passed to the appropriate process-creation functions to cause child processes
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to use a modified environment.
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If the platform supports the :func:`unsetenv` function, you can delete items in
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this mapping to unset environment variables. :func:`unsetenv` will be called
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automatically when an item is deleted from ``os.environ``, and when
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one of the :meth:`pop` or :meth:`clear` methods is called.
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You can delete items in this mapping to unset environment variables.
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:func:`unsetenv` will be called automatically when an item is deleted from
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``os.environ``, and when one of the :meth:`pop` or :meth:`clear` methods is
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called.
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.. data:: environb
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@ -439,17 +435,18 @@ process and user.
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changes to the environment affect subprocesses started with :func:`os.system`,
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:func:`popen` or :func:`fork` and :func:`execv`.
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.. availability:: most flavors of Unix, Windows.
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Assignments to items in ``os.environ`` are automatically translated into
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corresponding calls to :func:`putenv`; however, calls to :func:`putenv`
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don't update ``os.environ``, so it is actually preferable to assign to items
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of ``os.environ``.
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.. note::
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On some platforms, including FreeBSD and Mac OS X, setting ``environ`` may
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cause memory leaks. Refer to the system documentation for putenv.
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cause memory leaks. Refer to the system documentation for :c:func:`putenv`.
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When :func:`putenv` is supported, assignments to items in ``os.environ`` are
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automatically translated into corresponding calls to :func:`putenv`; however,
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calls to :func:`putenv` don't update ``os.environ``, so it is actually
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preferable to assign to items of ``os.environ``.
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.. versionchanged:: 3.9
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The function is now always available.
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.. function:: setegid(egid)
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@ -638,15 +635,13 @@ process and user.
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environment affect subprocesses started with :func:`os.system`, :func:`popen` or
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:func:`fork` and :func:`execv`.
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When :func:`unsetenv` is supported, deletion of items in ``os.environ`` is
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automatically translated into a corresponding call to :func:`unsetenv`; however,
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calls to :func:`unsetenv` don't update ``os.environ``, so it is actually
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preferable to delete items of ``os.environ``.
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.. availability:: most flavors of Unix, Windows.
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Deletion of items in ``os.environ`` is automatically translated into a
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corresponding call to :func:`unsetenv`; however, calls to :func:`unsetenv`
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don't update ``os.environ``, so it is actually preferable to delete items of
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``os.environ``.
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.. versionchanged:: 3.9
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The function is now also available on Windows.
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The function is now always available and is also available on Windows.
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.. _os-newstreams:
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@ -227,6 +227,10 @@ descriptors.
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The :func:`os.unsetenv` function is now also available on Windows.
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(Contributed by Victor Stinner in :issue:`39413`.)
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The :func:`os.putenv` and :func:`os.unsetenv` functions are now always
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available.
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(Contributed by Victor Stinner in :issue:`39395`.)
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poplib
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------
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@ -331,6 +335,10 @@ Build and C API Changes
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Python 3.0, it has been ignored and unused.
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(Contributed by Jeroen Demeyer in :issue:`36974`.)
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* On non-Windows platforms, the :c:func:`setenv` and :c:func:`unsetenv`
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functions are now required to build Python.
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(Contributed by Victor Stinner in :issue:`39395`.)
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Deprecated
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==========
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32
Lib/os.py
32
Lib/os.py
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@ -654,17 +654,15 @@ def get_exec_path(env=None):
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return path_list.split(pathsep)
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# Change environ to automatically call putenv(), unsetenv if they exist.
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# Change environ to automatically call putenv() and unsetenv()
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from _collections_abc import MutableMapping
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class _Environ(MutableMapping):
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def __init__(self, data, encodekey, decodekey, encodevalue, decodevalue, putenv, unsetenv):
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def __init__(self, data, encodekey, decodekey, encodevalue, decodevalue):
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self.encodekey = encodekey
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self.decodekey = decodekey
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self.encodevalue = encodevalue
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self.decodevalue = decodevalue
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self.putenv = putenv
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self.unsetenv = unsetenv
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self._data = data
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def __getitem__(self, key):
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@ -678,12 +676,12 @@ class _Environ(MutableMapping):
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def __setitem__(self, key, value):
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key = self.encodekey(key)
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value = self.encodevalue(value)
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self.putenv(key, value)
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putenv(key, value)
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self._data[key] = value
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def __delitem__(self, key):
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encodedkey = self.encodekey(key)
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self.unsetenv(encodedkey)
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unsetenv(encodedkey)
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try:
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del self._data[encodedkey]
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except KeyError:
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@ -712,22 +710,6 @@ class _Environ(MutableMapping):
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self[key] = value
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return self[key]
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try:
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_putenv = putenv
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except NameError:
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_putenv = lambda key, value: None
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else:
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if "putenv" not in __all__:
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__all__.append("putenv")
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try:
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_unsetenv = unsetenv
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except NameError:
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_unsetenv = lambda key: _putenv(key, "")
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else:
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if "unsetenv" not in __all__:
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__all__.append("unsetenv")
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def _createenviron():
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if name == 'nt':
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# Where Env Var Names Must Be UPPERCASE
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@ -755,8 +737,7 @@ def _createenviron():
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data = environ
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return _Environ(data,
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encodekey, decode,
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encode, decode,
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_putenv, _unsetenv)
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encode, decode)
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# unicode environ
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environ = _createenviron()
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@ -781,8 +762,7 @@ if supports_bytes_environ:
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# bytes environ
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environb = _Environ(environ._data,
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_check_bytes, bytes,
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_check_bytes, bytes,
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_putenv, _unsetenv)
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_check_bytes, bytes)
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del _check_bytes
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def getenvb(key, default=None):
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@ -953,8 +953,6 @@ class EnvironTests(mapping_tests.BasicTestMappingProtocol):
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value_str = value.decode(sys.getfilesystemencoding(), 'surrogateescape')
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self.assertEqual(os.environ['bytes'], value_str)
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@unittest.skipUnless(hasattr(os, 'putenv'), "Test needs os.putenv()")
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@unittest.skipUnless(hasattr(os, 'unsetenv'), "Test needs os.unsetenv()")
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def test_putenv_unsetenv(self):
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name = "PYTHONTESTVAR"
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value = "testvalue"
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@ -975,8 +973,6 @@ class EnvironTests(mapping_tests.BasicTestMappingProtocol):
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# On OS X < 10.6, unsetenv() doesn't return a value (bpo-13415).
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@support.requires_mac_ver(10, 6)
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@unittest.skipUnless(hasattr(os, 'putenv'), "Test needs os.putenv()")
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@unittest.skipUnless(hasattr(os, 'unsetenv'), "Test needs os.unsetenv()")
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def test_putenv_unsetenv_error(self):
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# Empty variable name is invalid.
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# "=" and null character are not allowed in a variable name.
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@ -969,7 +969,6 @@ class PosixTester(unittest.TestCase):
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self.assertEqual(type(k), item_type)
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self.assertEqual(type(v), item_type)
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@unittest.skipUnless(hasattr(os, "putenv"), "requires os.putenv()")
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def test_putenv(self):
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with self.assertRaises(ValueError):
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os.putenv('FRUIT\0VEGETABLE', 'cabbage')
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@ -0,0 +1,2 @@
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On non-Windows platforms, the :c:func:`setenv` and :c:func:`unsetenv` functions
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are now required to build Python.
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@ -0,0 +1,2 @@
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The :func:`os.putenv` and :func:`os.unsetenv` functions are now always
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available.
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@ -6082,7 +6082,7 @@ exit:
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#endif /* defined(MS_WINDOWS) */
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#if ((defined(HAVE_SETENV) || defined(HAVE_PUTENV)) && !defined(MS_WINDOWS))
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#if !defined(MS_WINDOWS)
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PyDoc_STRVAR(os_putenv__doc__,
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"putenv($module, name, value, /)\n"
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@ -6123,7 +6123,7 @@ exit:
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return return_value;
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}
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#endif /* ((defined(HAVE_SETENV) || defined(HAVE_PUTENV)) && !defined(MS_WINDOWS)) */
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#endif /* !defined(MS_WINDOWS) */
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#if defined(MS_WINDOWS)
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@ -6161,7 +6161,7 @@ exit:
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#endif /* defined(MS_WINDOWS) */
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#if (defined(HAVE_UNSETENV) && !defined(MS_WINDOWS))
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#if !defined(MS_WINDOWS)
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PyDoc_STRVAR(os_unsetenv__doc__,
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"unsetenv($module, name, /)\n"
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@ -6193,7 +6193,7 @@ exit:
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return return_value;
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}
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#endif /* (defined(HAVE_UNSETENV) && !defined(MS_WINDOWS)) */
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#endif /* !defined(MS_WINDOWS) */
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PyDoc_STRVAR(os_strerror__doc__,
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"strerror($module, code, /)\n"
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@ -8809,4 +8809,4 @@ exit:
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#ifndef OS__REMOVE_DLL_DIRECTORY_METHODDEF
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#define OS__REMOVE_DLL_DIRECTORY_METHODDEF
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#endif /* !defined(OS__REMOVE_DLL_DIRECTORY_METHODDEF) */
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/*[clinic end generated code: output=0348cbdff48691e3 input=a9049054013a1b77]*/
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/*[clinic end generated code: output=5d99f90cead7c0e1 input=a9049054013a1b77]*/
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@ -819,22 +819,8 @@ dir_fd_converter(PyObject *o, void *p)
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}
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}
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/* Windows _wputenv() and setenv() copy the arguments and so don't require
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the caller to manage the variable memory. Only Unix putenv() requires
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putenv_dict. */
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#if defined(HAVE_PUTENV) && !defined(MS_WINDOWS) && !defined(HAVE_SETENV)
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# define PY_PUTENV_DICT
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#endif
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typedef struct {
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PyObject *billion;
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#ifdef PY_PUTENV_DICT
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/* putenv() requires that the caller manages the environment variable
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memory. Use a Python dictionary for that: name => env, where env is a
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string like "name=value". On Windows, dict keys and values are Unicode
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strings. On Unix, they are bytes strings. */
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PyObject *putenv_dict;
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#endif
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PyObject *DirEntryType;
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PyObject *ScandirIteratorType;
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#if defined(HAVE_SCHED_SETPARAM) || defined(HAVE_SCHED_SETSCHEDULER) || defined(POSIX_SPAWN_SETSCHEDULER) || defined(POSIX_SPAWN_SETSCHEDPARAM)
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@ -2118,9 +2104,6 @@ static int
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_posix_clear(PyObject *module)
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{
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Py_CLEAR(_posixstate(module)->billion);
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#ifdef PY_PUTENV_DICT
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Py_CLEAR(_posixstate(module)->putenv_dict);
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#endif
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Py_CLEAR(_posixstate(module)->DirEntryType);
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Py_CLEAR(_posixstate(module)->ScandirIteratorType);
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#if defined(HAVE_SCHED_SETPARAM) || defined(HAVE_SCHED_SETSCHEDULER) || defined(POSIX_SPAWN_SETSCHEDULER) || defined(POSIX_SPAWN_SETSCHEDPARAM)
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@ -2145,9 +2128,6 @@ static int
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_posix_traverse(PyObject *module, visitproc visit, void *arg)
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{
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Py_VISIT(_posixstate(module)->billion);
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#ifdef PY_PUTENV_DICT
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Py_VISIT(_posixstate(module)->putenv_dict);
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#endif
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Py_VISIT(_posixstate(module)->DirEntryType);
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Py_VISIT(_posixstate(module)->ScandirIteratorType);
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#if defined(HAVE_SCHED_SETPARAM) || defined(HAVE_SCHED_SETSCHEDULER) || defined(POSIX_SPAWN_SETSCHEDULER) || defined(POSIX_SPAWN_SETSCHEDPARAM)
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@ -10065,23 +10045,6 @@ os_posix_fadvise_impl(PyObject *module, int fd, Py_off_t offset,
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#endif /* HAVE_POSIX_FADVISE && !POSIX_FADVISE_AIX_BUG */
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#ifdef PY_PUTENV_DICT
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static void
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posix_putenv_dict_setitem(PyObject *name, PyObject *value)
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{
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/* Install the first arg and newstr in putenv_dict;
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* this will cause previous value to be collected. This has to
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* happen after the real putenv() call because the old value
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* was still accessible until then. */
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if (PyDict_SetItem(_posixstate_global->putenv_dict, name, value))
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/* really not much we can do; just leak */
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PyErr_Clear();
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else
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Py_DECREF(value);
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}
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#endif /* PY_PUTENV_DICT */
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#ifdef MS_WINDOWS
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static PyObject*
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win32_putenv(PyObject *name, PyObject *value)
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@ -10157,8 +10120,7 @@ os_putenv_impl(PyObject *module, PyObject *name, PyObject *value)
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{
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return win32_putenv(name, value);
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}
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/* repeat !defined(MS_WINDOWS) to workaround an Argument Clinic issue */
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#elif (defined(HAVE_SETENV) || defined(HAVE_PUTENV)) && !defined(MS_WINDOWS)
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#else
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/*[clinic input]
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os.putenv
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@ -10181,27 +10143,12 @@ os_putenv_impl(PyObject *module, PyObject *name, PyObject *value)
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return NULL;
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}
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#ifdef HAVE_SETENV
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if (setenv(name_string, value_string, 1)) {
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return posix_error();
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}
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#else
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PyObject *bytes = PyBytes_FromFormat("%s=%s", name_string, value_string);
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if (bytes == NULL) {
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return NULL;
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}
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char *env = PyBytes_AS_STRING(bytes);
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if (putenv(env)) {
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Py_DECREF(bytes);
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return posix_error();
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}
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posix_putenv_dict_setitem(name, bytes);
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#endif
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Py_RETURN_NONE;
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}
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#endif /* defined(HAVE_SETENV) || defined(HAVE_PUTENV) */
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#endif /* !defined(MS_WINDOWS) */
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#ifdef MS_WINDOWS
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@ -10219,8 +10166,7 @@ os_unsetenv_impl(PyObject *module, PyObject *name)
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{
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return win32_putenv(name, NULL);
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}
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/* repeat !defined(MS_WINDOWS) to workaround an Argument Clinic issue */
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#elif defined(HAVE_UNSETENV) && !defined(MS_WINDOWS)
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#else
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/*[clinic input]
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os.unsetenv
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name: FSConverter
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@ -10242,24 +10188,9 @@ os_unsetenv_impl(PyObject *module, PyObject *name)
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}
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#endif
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#ifdef PY_PUTENV_DICT
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/* Remove the key from putenv_dict;
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* this will cause it to be collected. This has to
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* happen after the real unsetenv() call because the
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* old value was still accessible until then.
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*/
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if (PyDict_DelItem(_posixstate(module)->putenv_dict, name)) {
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/* really not much we can do; just leak */
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if (!PyErr_ExceptionMatches(PyExc_KeyError)) {
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return NULL;
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}
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PyErr_Clear();
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}
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#endif
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Py_RETURN_NONE;
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}
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#endif /* HAVE_UNSETENV */
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#endif /* !MS_WINDOWS */
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/*[clinic input]
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@ -14553,12 +14484,6 @@ INITFUNC(void)
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Py_INCREF(PyExc_OSError);
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PyModule_AddObject(m, "error", PyExc_OSError);
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#ifdef PY_PUTENV_DICT
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/* Save putenv() parameters as values here, so we can collect them when they
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* get re-set with another call for the same key. */
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_posixstate(m)->putenv_dict = PyDict_New();
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#endif
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#if defined(HAVE_WAITID) && !defined(__APPLE__)
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waitid_result_desc.name = MODNAME ".waitid_result";
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PyObject *WaitidResultType = (PyObject *)PyStructSequence_NewType(&waitid_result_desc);
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|
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@ -11548,9 +11548,9 @@ for ac_func in alarm accept4 setitimer getitimer bind_textdomain_codeset chown \
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memrchr mbrtowc mkdirat mkfifo \
|
||||
madvise mkfifoat mknod mknodat mktime mremap nice openat pathconf pause pipe2 plock poll \
|
||||
posix_fallocate posix_fadvise posix_spawn posix_spawnp pread preadv preadv2 \
|
||||
pthread_condattr_setclock pthread_init pthread_kill putenv pwrite pwritev pwritev2 \
|
||||
pthread_condattr_setclock pthread_init pthread_kill pwrite pwritev pwritev2 \
|
||||
readlink readlinkat readv realpath renameat \
|
||||
sem_open sem_timedwait sem_getvalue sem_unlink sendfile setegid setenv seteuid \
|
||||
sem_open sem_timedwait sem_getvalue sem_unlink sendfile setegid seteuid \
|
||||
setgid sethostname \
|
||||
setlocale setregid setreuid setresuid setresgid setsid setpgid setpgrp setpriority setuid setvbuf \
|
||||
sched_get_priority_max sched_setaffinity sched_setscheduler sched_setparam \
|
||||
|
|
@ -11558,7 +11558,7 @@ for ac_func in alarm accept4 setitimer getitimer bind_textdomain_codeset chown \
|
|||
sigaction sigaltstack sigfillset siginterrupt sigpending sigrelse \
|
||||
sigtimedwait sigwait sigwaitinfo snprintf strftime strlcpy strsignal symlinkat sync \
|
||||
sysconf tcgetpgrp tcsetpgrp tempnam timegm times tmpfile tmpnam tmpnam_r \
|
||||
truncate uname unlinkat unsetenv utimensat utimes waitid waitpid wait3 wait4 \
|
||||
truncate uname unlinkat utimensat utimes waitid waitpid wait3 wait4 \
|
||||
wcscoll wcsftime wcsxfrm wmemcmp writev _getpty rtpSpawn
|
||||
do :
|
||||
as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
|
||||
|
|
|
|||
|
|
@ -3598,9 +3598,9 @@ AC_CHECK_FUNCS(alarm accept4 setitimer getitimer bind_textdomain_codeset chown \
|
|||
memrchr mbrtowc mkdirat mkfifo \
|
||||
madvise mkfifoat mknod mknodat mktime mremap nice openat pathconf pause pipe2 plock poll \
|
||||
posix_fallocate posix_fadvise posix_spawn posix_spawnp pread preadv preadv2 \
|
||||
pthread_condattr_setclock pthread_init pthread_kill putenv pwrite pwritev pwritev2 \
|
||||
pthread_condattr_setclock pthread_init pthread_kill pwrite pwritev pwritev2 \
|
||||
readlink readlinkat readv realpath renameat \
|
||||
sem_open sem_timedwait sem_getvalue sem_unlink sendfile setegid setenv seteuid \
|
||||
sem_open sem_timedwait sem_getvalue sem_unlink sendfile setegid seteuid \
|
||||
setgid sethostname \
|
||||
setlocale setregid setreuid setresuid setresgid setsid setpgid setpgrp setpriority setuid setvbuf \
|
||||
sched_get_priority_max sched_setaffinity sched_setscheduler sched_setparam \
|
||||
|
|
@ -3608,7 +3608,7 @@ AC_CHECK_FUNCS(alarm accept4 setitimer getitimer bind_textdomain_codeset chown \
|
|||
sigaction sigaltstack sigfillset siginterrupt sigpending sigrelse \
|
||||
sigtimedwait sigwait sigwaitinfo snprintf strftime strlcpy strsignal symlinkat sync \
|
||||
sysconf tcgetpgrp tcsetpgrp tempnam timegm times tmpfile tmpnam tmpnam_r \
|
||||
truncate uname unlinkat unsetenv utimensat utimes waitid waitpid wait3 wait4 \
|
||||
truncate uname unlinkat utimensat utimes waitid waitpid wait3 wait4 \
|
||||
wcscoll wcsftime wcsxfrm wmemcmp writev _getpty rtpSpawn)
|
||||
|
||||
# Force lchmod off for Linux. Linux disallows changing the mode of symbolic
|
||||
|
|
|
|||
|
|
@ -802,9 +802,6 @@
|
|||
/* Define to 1 if you have the <pty.h> header file. */
|
||||
#undef HAVE_PTY_H
|
||||
|
||||
/* Define to 1 if you have the `putenv' function. */
|
||||
#undef HAVE_PUTENV
|
||||
|
||||
/* Define to 1 if you have the `pwrite' function. */
|
||||
#undef HAVE_PWRITE
|
||||
|
||||
|
|
@ -895,9 +892,6 @@
|
|||
/* Define to 1 if you have the `setegid' function. */
|
||||
#undef HAVE_SETEGID
|
||||
|
||||
/* Define to 1 if you have the `setenv' function. */
|
||||
#undef HAVE_SETENV
|
||||
|
||||
/* Define to 1 if you have the `seteuid' function. */
|
||||
#undef HAVE_SETEUID
|
||||
|
||||
|
|
@ -1266,9 +1260,6 @@
|
|||
/* Define to 1 if you have the `unlinkat' function. */
|
||||
#undef HAVE_UNLINKAT
|
||||
|
||||
/* Define to 1 if you have the `unsetenv' function. */
|
||||
#undef HAVE_UNSETENV
|
||||
|
||||
/* Define if you have a useable wchar_t type defined in wchar.h; useable means
|
||||
wchar_t must be an unsigned type with at least 16 bits. (see
|
||||
Include/unicodeobject.h). */
|
||||
|
|
|
|||
Loading…
Reference in New Issue