From f3c9815580f7e2684a7f517a4e656f13e4347e77 Mon Sep 17 00:00:00 2001
From: jvoisin
Date: Mon, 11 Sep 2023 17:55:38 +0200
Subject: Add a warning if realpath is called with path set to NULL

---
 include/stdlib.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'include')

diff --git a/include/stdlib.h b/include/stdlib.h
index 2671280..1a92bff 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -80,6 +80,7 @@ _FORTIFY_FN(reallocarray) void* reallocarray(void* __p, size_t __n, size_t __s)
 #if (defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)) && !defined(__clang__)
 #undef realpath
 __diagnose_as_builtin(__builtin_realpath, 1, 2)
+__warning_if(__p == NULL, "'realpath' called with path set to `NULL`; did you invert the arguments?")
 _FORTIFY_FN(realpath) char *realpath(const char *__p, char *__r)
 {
 #ifndef PATH_MAX
-- 
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