From 4dd099bafff14639ef5d2185965016d8f253353f Mon Sep 17 00:00:00 2001
From: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>
Date: Wed, 27 Jul 2022 18:35:29 +0530
Subject: GH-93899: fix checks for eventfd flags  (GH-95170)

---
 .../Library/2022-07-23-10-50-05.gh-issue-93899.VT34A5.rst  |  1 +
 Modules/clinic/posixmodule.c.h                             | 14 +++++++-------
 Modules/posixmodule.c                                      | 10 +++++++---
 3 files changed, 15 insertions(+), 10 deletions(-)
 create mode 100644 Misc/NEWS.d/next/Library/2022-07-23-10-50-05.gh-issue-93899.VT34A5.rst

diff --git a/Misc/NEWS.d/next/Library/2022-07-23-10-50-05.gh-issue-93899.VT34A5.rst b/Misc/NEWS.d/next/Library/2022-07-23-10-50-05.gh-issue-93899.VT34A5.rst
new file mode 100644
index 0000000..e63475f
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2022-07-23-10-50-05.gh-issue-93899.VT34A5.rst
@@ -0,0 +1 @@
+Fix check for existence of :data:`os.EFD_CLOEXEC`, :data:`os.EFD_NONBLOCK` and :data:`os.EFD_SEMAPHORE` flags on older kernel versions where these flags are not present. Patch by Kumar Aditya.
diff --git a/Modules/clinic/posixmodule.c.h b/Modules/clinic/posixmodule.c.h
index 3847349..ddd41ca 100644
--- a/Modules/clinic/posixmodule.c.h
+++ b/Modules/clinic/posixmodule.c.h
@@ -7873,7 +7873,7 @@ exit:
 
 #endif /* defined(HAVE_MEMFD_CREATE) */
 
-#if defined(HAVE_EVENTFD)
+#if (defined(HAVE_EVENTFD) && defined(EFD_CLOEXEC))
 
 PyDoc_STRVAR(os_eventfd__doc__,
 "eventfd($module, /, initval, flags=EFD_CLOEXEC)\n"
@@ -7919,9 +7919,9 @@ exit:
     return return_value;
 }
 
-#endif /* defined(HAVE_EVENTFD) */
+#endif /* (defined(HAVE_EVENTFD) && defined(EFD_CLOEXEC)) */
 
-#if defined(HAVE_EVENTFD)
+#if (defined(HAVE_EVENTFD) && defined(EFD_CLOEXEC))
 
 PyDoc_STRVAR(os_eventfd_read__doc__,
 "eventfd_read($module, /, fd)\n"
@@ -7957,9 +7957,9 @@ exit:
     return return_value;
 }
 
-#endif /* defined(HAVE_EVENTFD) */
+#endif /* (defined(HAVE_EVENTFD) && defined(EFD_CLOEXEC)) */
 
-#if defined(HAVE_EVENTFD)
+#if (defined(HAVE_EVENTFD) && defined(EFD_CLOEXEC))
 
 PyDoc_STRVAR(os_eventfd_write__doc__,
 "eventfd_write($module, /, fd, value)\n"
@@ -7999,7 +7999,7 @@ exit:
     return return_value;
 }
 
-#endif /* defined(HAVE_EVENTFD) */
+#endif /* (defined(HAVE_EVENTFD) && defined(EFD_CLOEXEC)) */
 
 #if (defined(TERMSIZE_USE_CONIO) || defined(TERMSIZE_USE_IOCTL))
 
@@ -9360,4 +9360,4 @@ exit:
 #ifndef OS_WAITSTATUS_TO_EXITCODE_METHODDEF
     #define OS_WAITSTATUS_TO_EXITCODE_METHODDEF
 #endif /* !defined(OS_WAITSTATUS_TO_EXITCODE_METHODDEF) */
-/*[clinic end generated code: output=9ff792e207a18392 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=c22a8b6de4a0ccb7 input=a9049054013a1b77]*/
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 2e89e2f..5855c42 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -13107,7 +13107,7 @@ os_memfd_create_impl(PyObject *module, PyObject *name, unsigned int flags)
 }
 #endif
 
-#ifdef HAVE_EVENTFD
+#if defined(HAVE_EVENTFD) && defined(EFD_CLOEXEC)
 /*[clinic input]
 os.eventfd
 
@@ -13178,7 +13178,7 @@ os_eventfd_write_impl(PyObject *module, int fd, unsigned long long value)
     }
     Py_RETURN_NONE;
 }
-#endif  /* HAVE_EVENTFD */
+#endif  /* HAVE_EVENTFD && EFD_CLOEXEC */
 
 /* Terminal size querying */
 
@@ -15465,11 +15465,15 @@ all_ins(PyObject *m)
 #endif
 #endif /* HAVE_MEMFD_CREATE */
 
-#ifdef HAVE_EVENTFD
+#if defined(HAVE_EVENTFD) && defined(EFD_CLOEXEC)
     if (PyModule_AddIntMacro(m, EFD_CLOEXEC)) return -1;
+#ifdef EFD_NONBLOCK
     if (PyModule_AddIntMacro(m, EFD_NONBLOCK)) return -1;
+#endif
+#ifdef EFD_SEMAPHORE
     if (PyModule_AddIntMacro(m, EFD_SEMAPHORE)) return -1;
 #endif
+#endif  /* HAVE_EVENTFD && EFD_CLOEXEC */
 
 #if defined(__APPLE__)
     if (PyModule_AddIntConstant(m, "_COPYFILE_DATA", COPYFILE_DATA)) return -1;
-- 
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