From 478fee2876ecf9c1bfc6ff66ef3f261a2565cf5f Mon Sep 17 00:00:00 2001
From: Michael Vogt <michael.vogt@gmail.com>
Date: Mon, 12 Aug 2024 16:48:31 +0200
Subject: [PATCH] util: use `Libc.memfd_create()` when `os.memfd_create()` is
 missing

This provide compat for pyton versions below 3.8. This can be
removed (together with the previous commit) once we are at
python3.8+.
---
 osbuild/util/jsoncomm.py | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/osbuild/util/jsoncomm.py b/osbuild/util/jsoncomm.py
index 7180b24f..d9d49019 100644
--- a/osbuild/util/jsoncomm.py
+++ b/osbuild/util/jsoncomm.py
@@ -13,12 +13,20 @@ import os
 import socket
 from typing import Any, List, Optional
 
+from .linux import Libc
 from .types import PathLike
 
 
 @contextlib.contextmanager
 def memfd(name):
-    fd = os.memfd_create(name, 0)
+    if hasattr(os, "memfd_create"):
+        fd = os.memfd_create(name)
+    else:
+        # we can remove this "if/else" once we are at python3.8+
+        # and just use "os.memfd_create()"
+        libc = Libc.default()
+        fd = libc.memfd_create(name)
+
     try:
         yield fd
     finally: