From: Alejandro Colomar <alx@kernel.org>
Date: Sun, 26 Nov 2023 17:38:40 +0000 (+0100)
Subject: lib/attr.h: Add ATTR_STRING() attribute macro
X-Git-Tag: 4.15.0-rc1~89
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a61cf0068bf8b56dec5a1d42c9e9701199fcbb0f;p=thirdparty%2Fshadow.git

lib/attr.h: Add ATTR_STRING() attribute macro

It signals that a function parameter is a string _before_ the call.

Suggested-by: Serge Hallyn <serge@hallyn.com>
Signed-off-by: Alejandro Colomar <alx@kernel.org>
---

diff --git a/lib/attr.h b/lib/attr.h
index 56a2e0c9d..b1f153c7e 100644
--- a/lib/attr.h
+++ b/lib/attr.h
@@ -21,5 +21,11 @@
 # define ATTR_MALLOC(deallocator)
 #endif
 
+#if (__GNUC__ >= 14)
+# define ATTR_STRING(...)       [[gnu::null_terminated_string_arg(__VA_ARGS__)]]
+#else
+# define ATTR_STRING(...)
+#endif
+
 
 #endif  // include guard