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Backport of r81088, plus the exposure of the previously undocumented 

*ReflectionKey functions. Apparently that was not backported.

Merged revisions 81088 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

........
  r81088 | brian.curtin | 2010-05-11 14:13:13 -0500 (Tue, 11 May 2010) | 13 lines

  #8575 - Update and reorganize some _winreg contents.

  I've removed the hopeful note about a future higher-level module since
  it's been in there for quite a long time and nothing of the sort has
  come up. There are a few places where markup was added to cross-reference
  other sections, and many of the external links have been removed and now
  point to newly created sections containing previously undocumented
  information.

  The Value Types section was created and it's contents were taken from
  a function-specific area, since it applies to more than just that
  function. It fits in better with the other newly documented constants.
........
This commit is contained in:
Brian Curtin 2010-05-11 19:32:26 +00:00
parent 7ceb497ae6
commit 59170e37bb
1 changed files with 270 additions and 71 deletions
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341
Doc/library/_winreg.rst
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@ -19,10 +19,6 @@ integer as the registry handle, a :ref:`handle object <handle-object>` is used
to ensure that the handles are closed correctly, even if the programmer neglects
to explicitly close them.
This module exposes a very low-level interface to the Windows registry; it is
expected that in the future a new module will be created offering a higher-level
interface to the registry API.
This module offers the following functions:
@ -31,9 +27,9 @@ This module offers the following functions:
Closes a previously opened registry key. The *hkey* argument specifies a
previously opened key.
Note that if *hkey* is not closed using this method (or via
:meth:`handle.Close`), it is closed when the *hkey* object is destroyed by
Python.
.. note::
If *hkey* is not closed using this method (or via :meth:`hkey.Close() <PyHKEY.Close>`),
it is closed when the *hkey* object is destroyed by Python.
.. function:: ConnectRegistry(computer_name, key)
@ -55,8 +51,8 @@ This module offers the following functions:
Creates or opens the specified key, returning a
:ref:`handle object <handle-object>`.
*key* is an already open key, or one of the predefined :const:`HKEY_\*`
constants.
*key* is an already open key, or one of the predefined
:ref:`HKEY_* constants <hkey-constants>`.
*sub_key* is a string that names the key this method opens or creates.
@ -73,8 +69,8 @@ This module offers the following functions:
Deletes the specified key.
*key* is an already open key, or any one of the predefined :const:`HKEY_\*`
constants.
*key* is an already open key, or any one of the predefined
:ref:`HKEY_* constants <hkey-constants>`.
*sub_key* is a string that must be a subkey of the key identified by the *key*
parameter. This value must not be ``None``, and the key may not have subkeys.
@ -89,8 +85,8 @@ This module offers the following functions:
Removes a named value from a registry key.
*key* is an already open key, or one of the predefined :const:`HKEY_\*`
constants.
*key* is an already open key, or one of the predefined
:ref:`HKEY_* constants <hkey-constants>`.
*value* is a string that identifies the value to remove.
@ -99,8 +95,8 @@ This module offers the following functions:
Enumerates subkeys of an open registry key, returning a string.
*key* is an already open key, or any one of the predefined :const:`HKEY_\*`
constants.
*key* is an already open key, or any one of the predefined
:ref:`HKEY_* constants <hkey-constants>`.
*index* is an integer that identifies the index of the key to retrieve.
@ -113,8 +109,8 @@ This module offers the following functions:
Enumerates values of an open registry key, returning a tuple.
*key* is an already open key, or any one of the predefined :const:`HKEY_\*`
constants.
*key* is an already open key, or any one of the predefined
:ref:`HKEY_* constants <hkey-constants>`.
*index* is an integer that identifies the index of the value to retrieve.
@ -154,8 +150,8 @@ This module offers the following functions:
Writes all the attributes of a key to the registry.
*key* is an already open key, or one of the predefined :const:`HKEY_\*`
constants.
*key* is an already open key, or one of the predefined
:ref:`HKEY_* constants <hkey-constants>`.
It is not necessary to call :func:`FlushKey` to change a key. Registry changes are
flushed to disk by the registry using its lazy flusher. Registry changes are
@ -176,7 +172,7 @@ This module offers the following functions:
from a specified file into that subkey.
*key* is a handle returned by :func:`ConnectRegistry` or one of the constants
:const:`HKEY_USER` or :const:`HKEY_LOCAL_MACHINE`.
:const:`HKEY_USERS` or :const:`HKEY_LOCAL_MACHINE`.
*sub_key* is a string that identifies the subkey to load.
@ -186,7 +182,7 @@ This module offers the following functions:
A call to :func:`LoadKey` fails if the calling process does not have the
:const:`SE_RESTORE_PRIVILEGE` privilege. Note that privileges are different
from permissions -- see the `Win32 documentation
from permissions -- see the `RegLoadKey documentation
<http://msdn.microsoft.com/en-us/library/ms724889%28v=VS.85%29.aspx>`_ for
more details.
@ -198,18 +194,16 @@ This module offers the following functions:
Opens the specified key, returning a :ref:`handle object <handle-object>`.
*key* is an already open key, or any one of the predefined :const:`HKEY_\*`
constants.
*key* is an already open key, or any one of the predefined
:ref:`HKEY_* constants <hkey-constants>`.
*sub_key* is a string that identifies the sub_key to open.
*res* is a reserved integer, and must be zero. The default is zero.
*sam* is an integer that specifies an access mask that describes the desired
security access for the key. Default is :const:`KEY_READ`. See the `Win32
documentation
<http://msdn.microsoft.com/en-us/library/ms724878%28v=VS.85%29.aspx>`_ for
other allowed values.
security access for the key. Default is :const:`KEY_READ`. See
:ref:`Access Rights <access-rights>` for other allowed values.
The result is a new handle to the specified key.
@ -226,8 +220,8 @@ This module offers the following functions:
Returns information about a key, as a tuple.
*key* is an already open key, or one of the predefined :const:`HKEY_\*`
constants.
*key* is an already open key, or one of the predefined
:ref:`HKEY_* constants <hkey-constants>`.
The result is a tuple of 3 items:
@ -250,8 +244,8 @@ This module offers the following functions:
Retrieves the unnamed value for a key, as a string.
*key* is an already open key, or one of the predefined :const:`HKEY_\*`
constants.
*key* is an already open key, or one of the predefined
:ref:`HKEY_* constants <hkey-constants>`.
*sub_key* is a string that holds the name of the subkey with which the value is
associated. If this parameter is ``None`` or empty, the function retrieves the
@ -268,8 +262,8 @@ This module offers the following functions:
Retrieves the type and data for a specified value name associated with
an open registry key.
*key* is an already open key, or one of the predefined :const:`HKEY_\*`
constants.
*key* is an already open key, or one of the predefined
:ref:`HKEY_* constants <hkey-constants>`.
*value_name* is a string indicating the value to query.
@ -290,8 +284,8 @@ This module offers the following functions:
Saves the specified key, and all its subkeys to the specified file.
*key* is an already open key, or one of the predefined :const:`HKEY_\*`
constants.
*key* is an already open key, or one of the predefined
:ref:`HKEY_* constants <hkey-constants>`.
*file_name* is the name of the file to save registry data to. This file
cannot already exist. If this filename includes an extension, it cannot be
@ -301,8 +295,10 @@ This module offers the following functions:
If *key* represents a key on a remote computer, the path described by
*file_name* is relative to the remote computer. The caller of this method must
possess the :const:`SeBackupPrivilege` security privilege. Note that
privileges are different than permissions -- see the Win32 documentation for
more details.
privileges are different than permissions -- see the
`Conflicts Between User Rights and Permissions documentation
<http://msdn.microsoft.com/en-us/library/ms724878%28v=VS.85%29.aspx>`__
for more details.
This function passes NULL for *security_attributes* to the API.
@ -311,8 +307,8 @@ This module offers the following functions:
Associates a value with a specified key.
*key* is an already open key, or one of the predefined :const:`HKEY_\*`
constants.
*key* is an already open key, or one of the predefined
:ref:`HKEY_* constants <hkey-constants>`.
*sub_key* is a string that names the subkey with which the value is associated.
@ -337,42 +333,14 @@ This module offers the following functions:
Stores data in the value field of an open registry key.
*key* is an already open key, or one of the predefined :const:`HKEY_\*`
constants.
*key* is an already open key, or one of the predefined
:ref:`HKEY_* constants <hkey-constants>`.
*value_name* is a string that names the subkey with which the value is
associated.
*type* is an integer that specifies the type of the data. This should be one
of the following constants defined in this module:
+----------------------------------+---------------------------------------------+
| Constant | Meaning |
+==================================+=============================================+
| :const:`REG_BINARY` | Binary data in any form. |
+----------------------------------+---------------------------------------------+
| :const:`REG_DWORD` | A 32-bit number. |
+----------------------------------+---------------------------------------------+
| :const:`REG_DWORD_LITTLE_ENDIAN` | A 32-bit number in little-endian format. |
+----------------------------------+---------------------------------------------+
| :const:`REG_DWORD_BIG_ENDIAN` | A 32-bit number in big-endian format. |
+----------------------------------+---------------------------------------------+
| :const:`REG_EXPAND_SZ` | Null-terminated string containing |
| | references to environment variables |
| | (``%PATH%``). |
+----------------------------------+---------------------------------------------+
| :const:`REG_LINK` | A Unicode symbolic link. |
+----------------------------------+---------------------------------------------+
| :const:`REG_MULTI_SZ` | A sequence of null-terminated strings, |
| | terminated by two null characters. (Python |
| | handles this termination automatically.) |
+----------------------------------+---------------------------------------------+
| :const:`REG_NONE` | No defined value type. |
+----------------------------------+---------------------------------------------+
| :const:`REG_RESOURCE_LIST` | A device-driver resource list. |
+----------------------------------+---------------------------------------------+
| :const:`REG_SZ` | A null-terminated string. |
+----------------------------------+---------------------------------------------+
*type* is an integer that specifies the type of the data. See
:ref:`Value Types <value-types>` for the available types.
*reserved* can be anything -- zero is always passed to the API.
@ -389,6 +357,237 @@ This module offers the following functions:
registry. This helps the registry perform efficiently.
.. function:: DisableReflectionKey(key)
Disables registry reflection for 32-bit processes running on a 64-bit
operating system.
*key* is an already open key, or one of the predefined
:ref:`HKEY_* constants <hkey-constants>`.
Will generally raise :exc:`NotImplemented` if executed on a 32-bit
operating system.
If the key is not on the reflection list, the function succeeds but has no
effect. Disabling reflection for a key does not affect reflection of any
subkeys.
.. function:: EnableReflectionKey(key)
Restores registry reflection for the specified disabled key.
*key* is an already open key, or one of the predefined
:ref:`HKEY_* constants <hkey-constants>`.
Will generally raise :exc:`NotImplemented` if executed on a 32-bit
operating system.
Restoring reflection for a key does not affect reflection of any subkeys.
.. function:: QueryReflectionKey(key)
Determines the reflection state for the specified key.
*key* is an already open key, or one of the predefined
:ref:`HKEY_* constants <hkey-constants>`.
Returns ``True`` if reflection is disabled.
Will generally raise :exc:`NotImplemented` if executed on a 32-bit
operating system.
.. _constants:
Constants
------------------
The following constants are defined for use in many :mod:`_winreg` functions.
.. _hkey-constants:
HKEY_* Constants
++++++++++++++++
.. data:: HKEY_CLASSES_ROOT
Registry entries subordinate to this key define types (or classes) of
documents and the properties associated with those types. Shell and
COM applications use the information stored under this key.
.. data:: HKEY_CURRENT_USER
Registry entries subordinate to this key define the preferences of
the current user. These preferences include the settings of
environment variables, data about program groups, colors, printers,
network connections, and application preferences.
.. data:: HKEY_LOCAL_MACHINE
Registry entries subordinate to this key define the physical state
of the computer, including data about the bus type, system memory,
and installed hardware and software.
.. data:: HKEY_USERS
Registry entries subordinate to this key define the default user
configuration for new users on the local computer and the user
configuration for the current user.
.. data:: HKEY_PERFORMANCE_DATA
Registry entries subordinate to this key allow you to access
performance data. The data is not actually stored in the registry;
the registry functions cause the system to collect the data from
its source.
.. data:: HKEY_CURRENT_CONFIG
Contains information about the current hardware profile of the
local computer system.
.. data:: HKEY_DYN_DATA
This key is not used in versions of Windows after 98.
.. _access-rights:
Access Rights
+++++++++++++
For more information, see `Registry Key Security and Access
<http://msdn.microsoft.com/en-us/library/ms724878%28v=VS.85%29.aspx>`__.
.. data:: KEY_ALL_ACCESS
Combines the STANDARD_RIGHTS_REQUIRED, :const:`KEY_QUERY_VALUE`,
:const:`KEY_SET_VALUE`, :const:`KEY_CREATE_SUB_KEY`,
:const:`KEY_ENUMERATE_SUB_KEYS`, :const:`KEY_NOTIFY`,
and :const:`KEY_CREATE_LINK` access rights.
.. data:: KEY_WRITE
Combines the STANDARD_RIGHTS_WRITE, :const:`KEY_SET_VALUE`, and
:const:`KEY_CREATE_SUB_KEY` access rights.
.. data:: KEY_READ
Combines the STANDARD_RIGHTS_READ, :const:`KEY_QUERY_VALUE`,
:const:`KEY_ENUMERATE_SUB_KEYS`, and :const:`KEY_NOTIFY` values.
.. data:: KEY_EXECUTE
Equivalent to :const:`KEY_READ`.
.. data:: KEY_QUERY_VALUE
Required to query the values of a registry key.
.. data:: KEY_SET_VALUE
Required to create, delete, or set a registry value.
.. data:: KEY_CREATE_SUB_KEY
Required to create a subkey of a registry key.
.. data:: KEY_ENUMERATE_SUB_KEYS
Required to enumerate the subkeys of a registry key.
.. data:: KEY_NOTIFY
Required to request change notifications for a registry key or for
subkeys of a registry key.
.. data:: KEY_CREATE_LINK
Reserved for system use.
.. _64-bit-access-rights:
64-bit Specific
***************
For more information, see `Accesing an Alternate Registry View
<http://msdn.microsoft.com/en-us/library/aa384129(v=VS.85).aspx>`__.
.. data:: KEY_WOW64_64KEY
Indicates that an application on 64-bit Windows should operate on
the 64-bit registry view.
.. data:: KEY_WOW64_32KEY
Indicates that an application on 64-bit Windows should operate on
the 32-bit registry view.
.. _value-types:
Value Types
+++++++++++
For more information, see `Registry Value Types
<http://msdn.microsoft.com/en-us/library/ms724884%28v=VS.85%29.aspx>`__.
.. data:: REG_BINARY
Binary data in any form.
.. data:: REG_DWORD
32-bit number.
.. data:: REG_DWORD_LITTLE_ENDIAN
A 32-bit number in little-endian format.
.. data:: REG_DWORD_BIG_ENDIAN
A 32-bit number in big-endian format.
.. data:: REG_EXPAND_SZ
Null-terminated string containing references to environment
variables (``%PATH%``).
.. data:: REG_LINK
A Unicode symbolic link.
.. data:: REG_MULTI_SZ
A sequence of null-terminated strings, terminated by two null characters.
(Python handles this termination automatically.)
.. data:: REG_NONE
No defined value type.
.. data:: REG_RESOURCE_LIST
A device-driver resource list.
.. data:: REG_FULL_RESOURCE_DESCRIPTOR
A hardware setting.
.. data:: REG_RESOURCE_REQUIREMENTS_LIST
A hardware resource list.
.. data:: REG_SZ
A null-terminated string.
.. _handle-object:
Registry Handle Objects