From e6376b6a4195e9caa0f8600db4aaf499b91b65d9 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Mon, 15 Jul 2019 13:32:03 +0200
Subject: [PATCH] errno: add new ERRNO_IS_NOT_SUPPORTED() helper

---
 src/basic/errno-util.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/basic/errno-util.h b/src/basic/errno-util.h
index 6053cde..b2723b8 100644
--- a/src/basic/errno-util.h
+++ b/src/basic/errno-util.h
@@ -86,3 +86,11 @@ static inline bool ERRNO_IS_RESOURCE(int r) {
                       ENFILE,
                       ENOMEM);
 }
+
+/* Three different errors for "operation/system call/ioctl not supported" */
+static inline bool ERRNO_IS_NOT_SUPPORTED(int r) {
+        return IN_SET(abs(r),
+                      EOPNOTSUPP,
+                      ENOTTY,
+                      ENOSYS);
+}
-- 
2.7.4