errno: add new ERRNO_IS_NOT_SUPPORTED() helper

diff --git a/src/basic/errno-util.h b/src/basic/errno-util.h
index 6053cde62dd4279fcfa43c133703bfea9f27b7d9..b2723b864e3644d54dcea31de0583f5526a1e7d7 100644 (file)
--- 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);
+}