3 files changed, 36 insertions, 0 deletions
diff --git a/Doc/c-api/init.rst b/Doc/c-api/init.rst
index dfb381953dd..1dab0af2659 100644
--- a/Doc/c-api/init.rst
+++ b/Doc/c-api/init.rst
@@ -429,6 +429,9 @@ Process-wide parameters
    .. versionchanged:: 3.10
       It now returns ``NULL`` if called before :c:func:`Py_Initialize`.
 
+   .. deprecated-removed:: 3.13 3.15
+      Get :data:`sys.executable` instead.
+
 
 .. c:function:: wchar_t* Py_GetPrefix()
 
@@ -448,6 +451,9 @@ Process-wide parameters
    .. versionchanged:: 3.10
       It now returns ``NULL`` if called before :c:func:`Py_Initialize`.
 
+   .. deprecated-removed:: 3.13 3.15
+      Get :data:`sys.prefix` instead.
+
 
 .. c:function:: wchar_t* Py_GetExecPrefix()
 
@@ -489,6 +495,9 @@ Process-wide parameters
    .. versionchanged:: 3.10
       It now returns ``NULL`` if called before :c:func:`Py_Initialize`.
 
+   .. deprecated-removed:: 3.13 3.15
+      Get :data:`sys.exec_prefix` instead.
+
 
 .. c:function:: wchar_t* Py_GetProgramFullPath()
 
@@ -507,6 +516,9 @@ Process-wide parameters
    .. versionchanged:: 3.10
       It now returns ``NULL`` if called before :c:func:`Py_Initialize`.
 
+   .. deprecated-removed:: 3.13 3.15
+      Get :data:`sys.executable` instead.
+
 
 .. c:function:: wchar_t* Py_GetPath()
 
@@ -532,6 +544,9 @@ Process-wide parameters
    .. versionchanged:: 3.10
       It now returns ``NULL`` if called before :c:func:`Py_Initialize`.
 
+   .. deprecated-removed:: 3.13 3.15
+      Get :data:`sys.path` instead.
+
 
 .. c:function:: const char* Py_GetVersion()
 
@@ -615,6 +630,10 @@ Process-wide parameters
    .. versionchanged:: 3.10
       It now returns ``NULL`` if called before :c:func:`Py_Initialize`.
 
+   .. deprecated-removed:: 3.13 3.15
+      Get :c:member:`PyConfig.home` or :envvar:`PYTHONHOME` environment
+      variable instead.
+
 
 .. _threads:
 
diff --git a/Doc/c-api/sys.rst b/Doc/c-api/sys.rst
index ad6005b7c7a..c4077b2a562 100644
--- a/Doc/c-api/sys.rst
+++ b/Doc/c-api/sys.rst
@@ -237,6 +237,9 @@ accessible to C code.  They all work with the current interpreter thread's
    Reset :data:`sys.warnoptions` to an empty list. This function may be
    called prior to :c:func:`Py_Initialize`.
 
+   .. deprecated-removed:: 3.13 3.15
+      Clear :data:`sys.warnoptions` and :data:`!warnings.filters` instead.
+
 .. c:function:: void PySys_WriteStdout(const char *format, ...)
 
    Write the output string described by *format* to :data:`sys.stdout`.  No
diff --git a/Doc/whatsnew/3.13.rst b/Doc/whatsnew/3.13.rst
index f3ded6ae34e..8427bda514b 100644
--- a/Doc/whatsnew/3.13.rst
+++ b/Doc/whatsnew/3.13.rst
@@ -357,6 +357,20 @@ Deprecated
   ``PY_UNICODE_TYPE`` are just aliases to ``wchar_t``.
   (Contributed by Victor Stinner in :gh:`105156`.)
 
+* Deprecate old Python initialization functions:
+
+  * :c:func:`PySys_ResetWarnOptions`:
+    clear :data:`sys.warnoptions` and :data:`!warnings.filters` instead.
+  * :c:func:`Py_GetExecPrefix`: get :data:`sys.exec_prefix` instead.
+  * :c:func:`Py_GetPath`: get :data:`sys.path` instead.
+  * :c:func:`Py_GetPrefix`: get :data:`sys.prefix` instead.
+  * :c:func:`Py_GetProgramFullPath`: get :data:`sys.executable` instead.
+  * :c:func:`Py_GetProgramName`: get :data:`sys.executable` instead.
+  * :c:func:`Py_GetPythonHome`: get :c:member:`PyConfig.home` or
+    :envvar:`PYTHONHOME` environment variable instead.
+
+  (Contributed by Victor Stinner in :gh:`105145`.)
+
 Removed
 -------