[3.13] gh-116622: Don't expose FICLONE ioctl on Android (GH-122522) (#122539)

gh-116622: Don't expose `FICLONE` ioctl on Android (GH-122522)

Don't expose `FICLONE` ioctl on Android

(cherry picked from commit 06656e2)

Co-authored-by: Malcolm Smith <smith@chaquo.com>
Co-authored-by: Russell Keith-Magee <russell@keith-magee.com>

Author: 3 people

Misc/NEWS.d/next/Library/2024-07-31-15-08-42.gh-issue-116622.aKxIQA.rst

@@ -0,0 +1,2 @@
+On Android, the ``FICLONE`` and ``FICLONERANGE`` constants are no longer
+exposed by :mod:`fcntl`, as these ioctls are blocked by SELinux.

Modules/fcntlmodule.c

@@ -580,12 +580,17 @@ all_ins(PyObject* m)
 #ifdef F_GETPIPE_SZ
     if (PyModule_AddIntMacro(m, F_GETPIPE_SZ)) return -1;
 #endif
+
+/* On Android, FICLONE is blocked by SELinux. */
+#ifndef __ANDROID__
 #ifdef FICLONE
     if (PyModule_AddIntMacro(m, FICLONE)) return -1;
 #endif
 #ifdef FICLONERANGE
     if (PyModule_AddIntMacro(m, FICLONERANGE)) return -1;
 #endif
+#endif
+
 #ifdef F_GETOWN_EX
     // since Linux 2.6.32
     if (PyModule_AddIntMacro(m, F_GETOWN_EX)) return -1;