[PATCH 03/11] libio: Add fortify wrapper for internal __snprintf

[Florian Weimer <fweimer@redhat.com>]

---
 debug/snprintf_chk.c  | 1 +
 include/bits/stdio2.h | 9 +++++++++
 include/stdio.h       | 1 +
 3 files changed, 11 insertions(+)

diff --git a/debug/snprintf_chk.c b/debug/snprintf_chk.c
index 995d805f5d..ea02efec3e 100644
--- a/debug/snprintf_chk.c
+++ b/debug/snprintf_chk.c
@@ -40,4 +40,5 @@ ___snprintf_chk (char *s, size_t maxlen, int flag, size_t slen,
 
   return ret;
 }
+ldbl_hidden_def (___snprintf_chk, __snprintf_chk)
 ldbl_strong_alias (___snprintf_chk, __snprintf_chk)
diff --git a/include/bits/stdio2.h b/include/bits/stdio2.h
index 6d7cf4306f..fb909c21ee 100644
--- a/include/bits/stdio2.h
+++ b/include/bits/stdio2.h
@@ -1 +1,10 @@
 #include <libio/bits/stdio2.h>
+
+__fortify_function int
+__NTH (__snprintf (char *__restrict __s, size_t __n,
+                   const char *__restrict __fmt, ...))
+{
+  return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
+				   __glibc_objsize (__s), __fmt,
+				   __va_arg_pack ());
+}
diff --git a/include/stdio.h b/include/stdio.h
index 24f1652f19..364f4d22a1 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -62,6 +62,7 @@ extern int __vsscanf (const char *__restrict __s,
 extern int __sprintf_chk (char *, int, size_t, const char *, ...) __THROW;
 extern int __snprintf_chk (char *, size_t, int, size_t, const char *, ...)
      __THROW;
+stdio_hidden_ldbl_proto (__, snprintf_chk)
 extern int __vsprintf_chk (char *, int, size_t, const char *,
 			   __gnuc_va_list) __THROW;
 extern int __vsnprintf_chk (char *, size_t, int, size_t, const char *,
-- 
2.43.0