bpo-26835: Add file sealing constants to fcntl (GH-13694)

tiran · nanjekyejoannah · web-flow · commit 8cbb5b662526 · 2019-05-31T18:32:33.000+02:00
Co-authored-by: nanjekyejoannah &lt;nanjekyejoannah@gmail.com&gt;
diff --git a/Doc/library/fcntl.rst b/Doc/library/fcntl.rst
@@ -28,6 +28,10 @@ descriptor.
    Operations in this module used to raise an :exc:`IOError` where they now
    raise an :exc:`OSError`.
 
+.. versionchanged:: 3.8
+   The fcntl module now contains ``F_ADD_SEALS``, ``F_GET_SEALS``, and
+   ``F_SEAL_*`` constants for sealing of :func:`os.memfd_create` file
+   descriptors.
 
 The module defines the following functions:
 
diff --git a/Misc/NEWS.d/next/Library/2019-05-31-11-33-11.bpo-26835.xGbUX0.rst b/Misc/NEWS.d/next/Library/2019-05-31-11-33-11.bpo-26835.xGbUX0.rst
@@ -0,0 +1 @@
+The fcntl module now contains file sealing constants for sealing of memfds.
diff --git a/Modules/fcntlmodule.c b/Modules/fcntlmodule.c
@@ -620,7 +620,15 @@ all_ins(PyObject* m)
     if (PyModule_AddIntMacro(m, I_PLINK)) return -1;
     if (PyModule_AddIntMacro(m, I_PUNLINK)) return -1;
 #endif
-
+#ifdef F_ADD_SEALS
+    /* Linux: file sealing for memfd_create() */
+    if (PyModule_AddIntMacro(m, F_ADD_SEALS)) return -1;
+    if (PyModule_AddIntMacro(m, F_GET_SEALS)) return -1;
+    if (PyModule_AddIntMacro(m, F_SEAL_SEAL)) return -1;
+    if (PyModule_AddIntMacro(m, F_SEAL_SHRINK)) return -1;
+    if (PyModule_AddIntMacro(m, F_SEAL_GROW)) return -1;
+    if (PyModule_AddIntMacro(m, F_SEAL_WRITE)) return -1;
+#endif
     return 0;
 }
 

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+The fcntl module now contains file sealing constants for sealing of memfds.`