Fix REALLOC_ZERO_BYTES_FREES comment to match C17

[thirdparty/glibc.git] / debug / vprintf_chk.c

diff --git a/debug/vprintf_chk.c b/debug/vprintf_chk.c
index 128d556ed4657d0ba61137bb6cdca9e3d64a26ce..1ca7b70610caed08221ed6a91c210dce2d8e2030 100644 (file)
--- a/debug/vprintf_chk.c
+++ b/debug/vprintf_chk.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991-2015 Free Software Foundation, Inc.
+/* Copyright (C) 1991-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -13,29 +13,19 @@
 
    You should have received a copy of the GNU Lesser General Public
    License along with the GNU C Library; if not, see
-   <http://www.gnu.org/licenses/>.  */
+   <https://www.gnu.org/licenses/>.  */
 
-#include <stdarg.h>
-#include <stdio.h>
-#include "../libio/libioP.h"
+#include <libio/libioP.h>
 
 
 /* Write formatted output to stdout from the format string FORMAT.  */
 int
 ___vprintf_chk (int flag, const char *format, va_list ap)
 {
-  int done;
+  /* For flag > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
+     can only come from read-only format strings.  */
+  unsigned int mode = (flag > 0) ? PRINTF_FORTIFY : 0;
 
-  _IO_acquire_lock_clear_flags2 (stdout);
-  if (flag > 0)
-    stdout->_flags2 |= _IO_FLAGS2_FORTIFY;
-
-  done = vfprintf (stdout, format, ap);
-
-  if (flag > 0)
-    stdout->_flags2 &= ~_IO_FLAGS2_FORTIFY;
-  _IO_release_lock (stdout);
-
-  return done;
+  return __vfprintf_internal (stdout, format, ap, mode);
 }
 ldbl_strong_alias (___vprintf_chk, __vprintf_chk)