Use PRINTF_LDBL_IS_DBL instead of __ldbl_is_dbl.zack/remove-mode-bits

After all that prep work, nldbl-compat.c can now use PRINTF_LDBL_IS_DBL
instead of __no_long_double to control the behavior of printf-like
functions; this is the last thing we needed __no_long_double for, so it
can go away entirely.

	* stdio-common/vfprintf-internal.c
	(__vfprintf_internal, __vfwprintf_internal): Don't use __ldbl_is_dbl.
	* sysdeps/generic/math_ldbl_opt.h: Remove __ldbl_is_dbl.
	* sysdeps/ieee754/ldbl-opt/math_ldbl_opt.h: Remove __ldbl_is_dbl
	and __no_long_double.
	* sysdeps/ieee754/ldbl-opt/math_ldbl_opt.c: Remove file.
	* sysdeps/ieee754/ldbl-opt/Makefile (routines): Remove math_ldbl_opt.
	* sysdeps/ieee754/ldbl-opt/nldbl-compat.c
	(__nldbl_cleanup, set_no_long_double, clear_no_long_double): Remove.
	(__nldbl___asprintf, __nldbl_dprintf, __nldbl_fprintf)
	(__nldbl_fwprintf, __nldbl_printf, __nldbl_sprintf)
	(__nldbl_vfprintf, __nldbl___vsprintf, __nldbl_obstack_vprintf)
	(__ndlbl_obstack_printf, __nldbl_snprintf, __nldbl_swprintf)
	(__nldbl_vasprintf, __nldbl_vdprintf, __nldbl_vfwprintf)
	(__nldbl_vprintf, __nldbl_vsnprintf, __ndlbl_vswprintf)
	(__nldbl_vwprintf, __nldbl_wprintf):
	Directly call the appropriate __v*printf_internal routine, passing
	PRINTF_LDBL_IS_DBL.  Do not mess with __no_long_double. Normalize
	variable names.
	(__nldbl___fprintf_chk, __nldbl___fwprintf_chk)
	(__nldbl___printf_chk, __nldbl___snprintf_chk)
	(__nldbl___sprintf_chk, __nldbl___swprintf_chk)
	(__nldbl___vfprintf_chk, __nldbl___vfwprintf_chk)
	(__nldbl___vprintf_chk, __nldbl___vsnprintf_chk)
	(__nldbl___vsprintf_chk, __nldbl___vswprintf_chk)
	(__nldbl___vwprintf_chk, __nldbl___wprintf_chk)
	(__nldbl___vasprintf_chk, __nldbl___asprintf_chk)
	(__nldbl___vdprintf_chk, __nldbl___dprintf_chk)
	(__nldbl___obstack_vprintf_chk, __nldbl___obstack_printf_chk):
	Likewise, and also pass PRINTF_FORTIFY when appropriate.
	(__nldbl_syslog, __nldbl_vsyslog):
	Directly call __vsyslog_internal, passing PRINTF_LDBL_IS_DBL.
	(__nldbl_syslog_chk): Likewise, and also pass PRINTF_FORTIFY when
	appropriate.
	(__nldbl_vsyslog_chk): Likewise, and also pass PRINTF_FORTIFY when
	appropriate.  Remove libc_hidden_proto and libc_hidden_def.

34 files changed, 492 insertions, 784 deletions

diff --git a/debug/Makefile b/debug/Makefile
index c6f6feb0ec..f4153bb98d 100644
--- a/debug/Makefile
+++ b/debug/Makefile
@@ -45,7 +45,7 @@ routines  = backtrace backtracesyms backtracesymsfd noophooks \
 	    gethostname_chk getdomainname_chk wcrtomb_chk mbsnrtowcs_chk \
 	    wcsnrtombs_chk mbsrtowcs_chk wcsrtombs_chk mbstowcs_chk \
 	    wcstombs_chk asprintf_chk vasprintf_chk dprintf_chk \
-	    vdprintf_chk obprintf_chk \
+	    vdprintf_chk obprintf_chk vobprintf_chk \
 	    longjmp_chk ____longjmp_chk \
 	    fdelt_chk poll_chk ppoll_chk \
 	    explicit_bzero_chk \
diff --git a/debug/asprintf_chk.c b/debug/asprintf_chk.c
index 9cd4143f2e..eb885c35ca 100644
--- a/debug/asprintf_chk.c
+++ b/debug/asprintf_chk.c
@@ -15,22 +15,24 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#include <libioP.h>
 #include <stdarg.h>
-#include <stdio.h>
+#include <libio/libioP.h>
 
 
 /* Write formatted output from FORMAT to a string which is
    allocated with malloc and stored in *STRING_PTR.  */
 int
-__asprintf_chk (char **result_ptr, int flags, const char *format, ...)
+__asprintf_chk (char **result_ptr, int flag, const char *format, ...)
 {
-  va_list arg;
-  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;
+  va_list ap;
+  int ret;
 
-  va_start (arg, format);
-  done = __vasprintf_chk (result_ptr, flags, format, arg);
-  va_end (arg);
+  va_start (ap, format);
+  ret = __vasprintf_internal (result_ptr, format, ap, mode);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
diff --git a/debug/dprintf_chk.c b/debug/dprintf_chk.c
index df3867c61c..b5c62827c0 100644
--- a/debug/dprintf_chk.c
+++ b/debug/dprintf_chk.c
@@ -15,21 +15,23 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#include <libioP.h>
 #include <stdarg.h>
-#include <stdio.h>
+#include <libio/libioP.h>
 
 
 /* Write formatted output to D, according to the format string FORMAT.  */
 int
-__dprintf_chk (int d, int flags, const char *format, ...)
+__dprintf_chk (int d, int flag, const char *format, ...)
 {
-  va_list arg;
-  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;
+  va_list ap;
+  int ret;
 
-  va_start (arg, format);
-  done = __vdprintf_chk (d, flags, format, arg);
-  va_end (arg);
+  va_start (ap, format);
+  ret = __vdprintf_internal (d, format, ap, mode);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
diff --git a/debug/fprintf_chk.c b/debug/fprintf_chk.c
index cff4438afb..14afc073b2 100644
--- a/debug/fprintf_chk.c
+++ b/debug/fprintf_chk.c
@@ -16,29 +16,23 @@
    <http://www.gnu.org/licenses/>.  */
 
 #include <stdarg.h>
-#include <stdio.h>
-#include "../libio/libioP.h"
+#include <libio/libioP.h>
 
 
 /* Write formatted output to FP from the format string FORMAT.  */
 int
 ___fprintf_chk (FILE *fp, int flag, const char *format, ...)
 {
+  /* 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;
   va_list ap;
-  int done;
-
-  _IO_acquire_lock_clear_flags2 (fp);
-  if (flag > 0)
-    fp->_flags2 |= _IO_FLAGS2_FORTIFY;
+  int ret;
 
   va_start (ap, format);
-  done = vfprintf (fp, format, ap);
+  ret = __vfprintf_internal (fp, format, ap, mode);
   va_end (ap);
 
-  if (flag > 0)
-    fp->_flags2 &= ~_IO_FLAGS2_FORTIFY;
-  _IO_release_lock (fp);
-
-  return done;
+  return ret;
 }
 ldbl_strong_alias (___fprintf_chk, __fprintf_chk)
diff --git a/debug/fwprintf_chk.c b/debug/fwprintf_chk.c
index 63167c1839..10d84ce98b 100644
--- a/debug/fwprintf_chk.c
+++ b/debug/fwprintf_chk.c
@@ -16,28 +16,22 @@
    <http://www.gnu.org/licenses/>.  */
 
 #include <stdarg.h>
-#include <wchar.h>
-#include "../libio/libioP.h"
+#include <libio/libioP.h>
 
 
 /* Write formatted output to FP from the format string FORMAT.  */
 int
 __fwprintf_chk (FILE *fp, int flag, const wchar_t *format, ...)
 {
+  /* 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;
   va_list ap;
-  int done;
-
-  _IO_acquire_lock_clear_flags2 (fp);
-  if (flag > 0)
-    fp->_flags2 |= _IO_FLAGS2_FORTIFY;
+  int ret;
 
   va_start (ap, format);
-  done = __vfwprintf_internal (fp, format, ap, 0);
+  ret = __vfwprintf_internal (fp, format, ap, mode);
   va_end (ap);
 
-  if (flag > 0)
-    fp->_flags2 &= ~_IO_FLAGS2_FORTIFY;
-  _IO_release_lock (fp);
-
-  return done;
+  return ret;
 }
diff --git a/debug/obprintf_chk.c b/debug/obprintf_chk.c
index 41dd481c34..c1a8f9e9a9 100644
--- a/debug/obprintf_chk.c
+++ b/debug/obprintf_chk.c
@@ -17,99 +17,23 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-
-#include <stdlib.h>
-#include <libioP.h>
-#include "../libio/strfile.h"
-#include <assert.h>
-#include <string.h>
-#include <errno.h>
-#include <obstack.h>
+#include <libio/libioP.h>
 #include <stdarg.h>
-#include <stdio_ext.h>
-
-
-struct _IO_obstack_file
-{
-  struct _IO_FILE_plus file;
-  struct obstack *obstack;
-};
-
-extern const struct _IO_jump_t _IO_obstack_jumps libio_vtable attribute_hidden;
-
-int
-__obstack_vprintf_chk (struct obstack *obstack, int flags, const char *format,
-		       va_list args)
-{
-  struct obstack_FILE
-    {
-      struct _IO_obstack_file ofile;
-    } new_f;
-  int result;
-  int size;
-  int room;
-
-#ifdef _IO_MTSAFE_IO
-  new_f.ofile.file.file._lock = NULL;
-#endif
-
-  _IO_no_init (&new_f.ofile.file.file, _IO_USER_LOCK, -1, NULL, NULL);
-  _IO_JUMPS (&new_f.ofile.file) = &_IO_obstack_jumps;
-  room = obstack_room (obstack);
-  size = obstack_object_size (obstack) + room;
-  if (size == 0)
-    {
-      /* We have to handle the allocation a bit different since the
-	 `_IO_str_init_static' function would handle a size of zero
-	 different from what we expect.  */
-
-      /* Get more memory.  */
-      obstack_make_room (obstack, 64);
-
-      /* Recompute how much room we have.  */
-      room = obstack_room (obstack);
-      size = room;
-
-      assert (size != 0);
-    }
-
-  _IO_str_init_static_internal ((struct _IO_strfile_ *) &new_f.ofile,
-				obstack_base (obstack),
-				size, obstack_next_free (obstack));
-  /* Now allocate the rest of the current chunk.  */
-  assert (size == (new_f.ofile.file.file._IO_write_end
-		   - new_f.ofile.file.file._IO_write_base));
-  assert (new_f.ofile.file.file._IO_write_ptr
-	  == (new_f.ofile.file.file._IO_write_base
-	      + obstack_object_size (obstack)));
-  obstack_blank_fast (obstack, room);
-
-  new_f.ofile.obstack = obstack;
-
-  /* For flags > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
-     can only come from read-only format strings.  */
-  if (flags > 0)
-    new_f.ofile.file.file._flags2 |= _IO_FLAGS2_FORTIFY;
-
-  result = __vfprintf_internal (&new_f.ofile.file.file, format, args, 0);
-
-  /* Shrink the buffer to the space we really currently need.  */
-  obstack_blank_fast (obstack, (new_f.ofile.file.file._IO_write_ptr
-				- new_f.ofile.file.file._IO_write_end));
-
-  return result;
-}
-libc_hidden_def (__obstack_vprintf_chk)
 
 
 int
-__obstack_printf_chk (struct obstack *obstack, int flags, const char *format,
+__obstack_printf_chk (struct obstack *obstack, int flag, const char *format,
 		      ...)
 {
-  int result;
+  /* 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;
   va_list ap;
+  int ret;
+
   va_start (ap, format);
-  result = __obstack_vprintf_chk (obstack, flags, format, ap);
+  ret = __obstack_vprintf_internal (obstack, format, ap, mode);
   va_end (ap);
-  return result;
+
+  return ret;
 }
diff --git a/debug/printf_chk.c b/debug/printf_chk.c
index 426dc78386..e035b42590 100644
--- a/debug/printf_chk.c
+++ b/debug/printf_chk.c
@@ -16,29 +16,23 @@
    <http://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
 ___printf_chk (int flag, const char *format, ...)
 {
+  /* 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;
   va_list ap;
-  int done;
-
-  _IO_acquire_lock_clear_flags2 (stdout);
-  if (flag > 0)
-    stdout->_flags2 |= _IO_FLAGS2_FORTIFY;
+  int ret;
 
   va_start (ap, format);
-  done = vfprintf (stdout, format, ap);
+  ret = __vfprintf_internal (stdout, format, ap, mode);
   va_end (ap);
 
-  if (flag > 0)
-    stdout->_flags2 &= ~_IO_FLAGS2_FORTIFY;
-  _IO_release_lock (stdout);
-
-  return done;
+  return ret;
 }
 ldbl_strong_alias (___printf_chk, __printf_chk)
diff --git a/debug/snprintf_chk.c b/debug/snprintf_chk.c
index cddba37109..984b5e8932 100644
--- a/debug/snprintf_chk.c
+++ b/debug/snprintf_chk.c
@@ -15,25 +15,29 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#include <libioP.h>
 #include <stdarg.h>
-#include <stdio.h>
+#include <libio/libioP.h>
 
 
 /* Write formatted output into S, according to the format
    string FORMAT, writing no more than MAXLEN characters.  */
-/* VARARGS5 */
 int
-___snprintf_chk (char *s, size_t maxlen, int flags, size_t slen,
+___snprintf_chk (char *s, size_t maxlen, int flag, size_t slen,
 		 const char *format, ...)
 {
-  va_list arg;
-  int done;
+  if (__glibc_unlikely (slen < maxlen))
+    __chk_fail ();
 
-  va_start (arg, format);
-  done = __vsnprintf_chk (s, maxlen, flags, slen, format, arg);
-  va_end (arg);
+  /* 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;
+  va_list ap;
+  int ret;
 
-  return done;
+  va_start (ap, format);
+  ret = __vsnprintf_internal (s, maxlen, format, ap, mode);
+  va_end (ap);
+
+  return ret;
 }
 ldbl_strong_alias (___snprintf_chk, __snprintf_chk)
diff --git a/debug/sprintf_chk.c b/debug/sprintf_chk.c
index 78214563dd..649e8ab4d5 100644
--- a/debug/sprintf_chk.c
+++ b/debug/sprintf_chk.c
@@ -15,22 +15,27 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#include <libioP.h>
 #include <stdarg.h>
-#include <stdio.h>
+#include <libio/libioP.h>
+
 
 /* Write formatted output into S, according to the format string FORMAT.  */
-/* VARARGS4 */
 int
-___sprintf_chk (char *s, int flags, size_t slen, const char *format, ...)
+___sprintf_chk (char *s, int flag, size_t slen, const char *format, ...)
 {
-  va_list arg;
-  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;
+  va_list ap;
+  int ret;
+
+  if (slen == 0)
+    __chk_fail ();
 
-  va_start (arg, format);
-  done = __vsprintf_chk (s, flags, slen, format, arg);
-  va_end (arg);
+  va_start (ap, format);
+  ret = __vsprintf_internal (s, slen, format, ap, mode);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
 ldbl_strong_alias (___sprintf_chk, __sprintf_chk)
diff --git a/debug/swprintf_chk.c b/debug/swprintf_chk.c
index 35887e48e2..186c17751c 100644
--- a/debug/swprintf_chk.c
+++ b/debug/swprintf_chk.c
@@ -16,20 +16,27 @@
    <http://www.gnu.org/licenses/>.  */
 
 #include <stdarg.h>
-#include <wchar.h>
+#include <libio/libioP.h>
 
-/* Write formatted output into S, according to the format string FORMAT.  */
-/* VARARGS5 */
+
+/* Write formatted output into S, according to the format string FORMAT,
+   writing no more than MAXLEN characters.  */
 int
-__swprintf_chk (wchar_t *s, size_t n, int flag, size_t s_len,
+__swprintf_chk (wchar_t *s, size_t maxlen, int flag, size_t slen,
 		const wchar_t *format, ...)
 {
-  va_list arg;
-  int done;
+  if (__glibc_unlikely (slen < maxlen))
+    __chk_fail ();
+
+  /* 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;
+  va_list ap;
+  int ret;
 
-  va_start (arg, format);
-  done = __vswprintf_chk (s, n, flag, s_len, format, arg);
-  va_end (arg);
+  va_start (ap, format);
+  ret = __vswprintf_internal (s, maxlen, format, ap, mode);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
diff --git a/debug/vasprintf_chk.c b/debug/vasprintf_chk.c
index 6136694431..f5975ea02a 100644
--- a/debug/vasprintf_chk.c
+++ b/debug/vasprintf_chk.c
@@ -24,72 +24,14 @@
    This exception applies to code released by its copyright holders
    in files containing the exception.  */
 
-#include <malloc.h>
-#include <string.h>
-#include <stdio.h>
-#include <stdio_ext.h>
-#include "../libio/libioP.h"
-#include "../libio/strfile.h"
+#include <libio/libioP.h>
 
 int
-__vasprintf_chk (char **result_ptr, int flags, const char *format,
-		 va_list args)
+__vasprintf_chk (char **result_ptr, int flag, const char *format, va_list ap)
 {
-  /* Initial size of the buffer to be used.  Will be doubled each time an
-     overflow occurs.  */
-  const size_t init_string_size = 100;
-  char *string;
-  _IO_strfile sf;
-  int ret;
-  size_t needed;
-  size_t allocated;
-  /* No need to clear the memory here (unlike for open_memstream) since
-     we know we will never seek on the stream.  */
-  string = (char *) malloc (init_string_size);
-  if (string == NULL)
-    return -1;
-#ifdef _IO_MTSAFE_IO
-  sf._sbf._f._lock = NULL;
-#endif
-  _IO_no_init (&sf._sbf._f, _IO_USER_LOCK, -1, NULL, NULL);
-  _IO_JUMPS (&sf._sbf) = &_IO_str_jumps;
-  _IO_str_init_static_internal (&sf, string, init_string_size, string);
-  sf._sbf._f._flags &= ~_IO_USER_BUF;
-  sf._s._allocate_buffer = (_IO_alloc_type) malloc;
-  sf._s._free_buffer = (_IO_free_type) free;
-
-  /* For flags > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
+  /* For flag > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
      can only come from read-only format strings.  */
-  if (flags > 0)
-    sf._sbf._f._flags2 |= _IO_FLAGS2_FORTIFY;
+  unsigned int mode = (flag > 0) ? PRINTF_FORTIFY : 0;
 
-  ret = __vfprintf_internal (&sf._sbf._f, format, args, 0);
-  if (ret < 0)
-    {
-      free (sf._sbf._f._IO_buf_base);
-      return ret;
-    }
-  /* Only use realloc if the size we need is of the same (binary)
-     order of magnitude then the memory we allocated.  */
-  needed = sf._sbf._f._IO_write_ptr - sf._sbf._f._IO_write_base + 1;
-  allocated = sf._sbf._f._IO_write_end - sf._sbf._f._IO_write_base;
-  if ((allocated >> 1) <= needed)
-    *result_ptr = (char *) realloc (sf._sbf._f._IO_buf_base, needed);
-  else
-    {
-      *result_ptr = (char *) malloc (needed);
-      if (*result_ptr != NULL)
-	{
-	  memcpy (*result_ptr, sf._sbf._f._IO_buf_base, needed - 1);
-	  free (sf._sbf._f._IO_buf_base);
-	}
-      else
-	/* We have no choice, use the buffer we already have.  */
-	*result_ptr = (char *) realloc (sf._sbf._f._IO_buf_base, needed);
-    }
-  if (*result_ptr == NULL)
-    *result_ptr = sf._sbf._f._IO_buf_base;
-  (*result_ptr)[needed - 1] = '\0';
-  return ret;
+  return __vasprintf_internal (result_ptr, format, ap, mode);
 }
-libc_hidden_def (__vasprintf_chk)
diff --git a/debug/vdprintf_chk.c b/debug/vdprintf_chk.c
index 4386127cfe..e04514e355 100644
--- a/debug/vdprintf_chk.c
+++ b/debug/vdprintf_chk.c
@@ -24,41 +24,14 @@
    This exception applies to code released by its copyright holders
    in files containing the exception.  */
 
-#include <libioP.h>
-#include <stdio_ext.h>
+#include <libio/libioP.h>
 
 int
-__vdprintf_chk (int d, int flags, const char *format, va_list arg)
+__vdprintf_chk (int d, int flag, const char *format, va_list ap)
 {
-  struct _IO_FILE_plus tmpfil;
-  struct _IO_wide_data wd;
-  int done;
-
-#ifdef _IO_MTSAFE_IO
-  tmpfil.file._lock = NULL;
-#endif
-  _IO_no_init (&tmpfil.file, _IO_USER_LOCK, 0, &wd, &_IO_wfile_jumps);
-  _IO_JUMPS (&tmpfil) = &_IO_file_jumps;
-  _IO_new_file_init_internal (&tmpfil);
-  if (_IO_file_attach (&tmpfil.file, d) == NULL)
-    {
-      _IO_un_link (&tmpfil);
-      return EOF;
-    }
-  tmpfil.file._flags |= _IO_DELETE_DONT_CLOSE;
-
-  _IO_mask_flags (&tmpfil.file, _IO_NO_READS,
-		  _IO_NO_READS+_IO_NO_WRITES+_IO_IS_APPENDING);
-
-  /* For flags > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
+  /* For flag > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
      can only come from read-only format strings.  */
-  if (flags > 0)
-    tmpfil.file._flags2 |= _IO_FLAGS2_FORTIFY;
-
-  done = __vfprintf_internal (&tmpfil.file, format, arg, 0);
-
-  _IO_FINISH (&tmpfil.file);
+  unsigned int mode = (flag > 0) ? PRINTF_FORTIFY : 0;
 
-  return done;
+  return __vdprintf_internal (d, format, ap, mode);
 }
-libc_hidden_def (__vdprintf_chk)
diff --git a/debug/vfprintf_chk.c b/debug/vfprintf_chk.c
index 5babbf611e..44426e14fd 100644
--- a/debug/vfprintf_chk.c
+++ b/debug/vfprintf_chk.c
@@ -15,28 +15,17 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#include <stdarg.h>
-#include <stdio.h>
-#include "../libio/libioP.h"
+#include <libio/libioP.h>
 
 
 /* Write formatted output to FP from the format string FORMAT.  */
 int
 ___vfprintf_chk (FILE *fp, 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 (fp);
-  if (flag > 0)
-    fp->_flags2 |= _IO_FLAGS2_FORTIFY;
-
-  done = vfprintf (fp, format, ap);
-
-  if (flag > 0)
-    fp->_flags2 &= ~_IO_FLAGS2_FORTIFY;
-  _IO_release_lock (fp);
-
-  return done;
+  return __vfprintf_internal (fp, format, ap, mode);
 }
-ldbl_hidden_def (___vfprintf_chk, __vfprintf_chk)
 ldbl_strong_alias (___vfprintf_chk, __vfprintf_chk)
diff --git a/debug/vfwprintf_chk.c b/debug/vfwprintf_chk.c
index abf2bd6517..3aed308156 100644
--- a/debug/vfwprintf_chk.c
+++ b/debug/vfwprintf_chk.c
@@ -15,27 +15,16 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#include <stdarg.h>
-#include <wchar.h>
-#include "../libio/libioP.h"
+#include <libio/libioP.h>
 
 
 /* Write formatted output to FP from the format string FORMAT.  */
 int
 __vfwprintf_chk (FILE *fp, int flag, const wchar_t *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 (fp);
-  if (flag > 0)
-    fp->_flags2 |= _IO_FLAGS2_FORTIFY;
-
-  done = __vfwprintf_internal (fp, format, ap, 0);
-
-  if (flag > 0)
-    fp->_flags2 &= ~_IO_FLAGS2_FORTIFY;
-  _IO_release_lock (fp);
-
-  return done;
+  return __vfwprintf_internal (fp, format, ap, mode);
 }
-libc_hidden_def (__vfwprintf_chk)
diff --git a/debug/vobprintf_chk.c b/debug/vobprintf_chk.c
new file mode 100644
index 0000000000..edfbe8f00a
--- /dev/null
+++ b/debug/vobprintf_chk.c
@@ -0,0 +1,32 @@
+/* Print output of stream to given obstack.
+   Copyright (C) 1996-2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   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/>.  */
+
+#include <libio/libioP.h>
+
+
+int
+__obstack_vprintf_chk (struct obstack *obstack, int flag, const char *format,
+		       va_list ap)
+{
+  /* 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;
+
+  return __obstack_vprintf_internal (obstack, format, ap, mode);
+}
diff --git a/debug/vprintf_chk.c b/debug/vprintf_chk.c
index b3b2c53df2..69fcb721ac 100644
--- a/debug/vprintf_chk.c
+++ b/debug/vprintf_chk.c
@@ -15,27 +15,17 @@
    License along with the GNU C Library; if not, see
    <http://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)
diff --git a/debug/vsnprintf_chk.c b/debug/vsnprintf_chk.c
index 95d286f416..666a83b701 100644
--- a/debug/vsnprintf_chk.c
+++ b/debug/vsnprintf_chk.c
@@ -15,56 +15,22 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#include <stdarg.h>
-#include <stdio.h>
-#include "../libio/libioP.h"
-#include "../libio/strfile.h"
+#include <libio/libioP.h>
 
-extern const struct _IO_jump_t _IO_strn_jumps libio_vtable attribute_hidden;
 
 /* Write formatted output into S, according to the format
    string FORMAT, writing no more than MAXLEN characters.  */
-/* VARARGS5 */
 int
-___vsnprintf_chk (char *s, size_t maxlen, int flags, size_t slen,
-		  const char *format, va_list args)
+___vsnprintf_chk (char *s, size_t maxlen, int flag, size_t slen,
+		  const char *format, va_list ap)
 {
-  /* XXX Maybe for less strict version do not fail immediately.
-     Though, maxlen is supposed to be the size of buffer pointed
-     to by s, so a conforming program can't pass such maxlen
-     to *snprintf.  */
   if (__glibc_unlikely (slen < maxlen))
     __chk_fail ();
 
-  _IO_strnfile sf;
-  int ret;
-#ifdef _IO_MTSAFE_IO
-  sf.f._sbf._f._lock = NULL;
-#endif
-
-  /* We need to handle the special case where MAXLEN is 0.  Use the
-     overflow buffer right from the start.  */
-  if (maxlen == 0)
-    {
-      s = sf.overflow_buf;
-      maxlen = sizeof (sf.overflow_buf);
-    }
-
-  _IO_no_init (&sf.f._sbf._f, _IO_USER_LOCK, -1, NULL, NULL);
-  _IO_JUMPS (&sf.f._sbf) = &_IO_strn_jumps;
-  s[0] = '\0';
-
-  /* For flags > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
+  /* For flag > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
      can only come from read-only format strings.  */
-  if (flags > 0)
-    sf.f._sbf._f._flags2 |= _IO_FLAGS2_FORTIFY;
-
-  _IO_str_init_static_internal (&sf.f, s, maxlen - 1, s);
-  ret = __vfprintf_internal (&sf.f._sbf._f, format, args, 0);
+  unsigned int mode = (flag > 0) ? PRINTF_FORTIFY : 0;
 
-  if (sf.f._sbf._f._IO_buf_base != sf.overflow_buf)
-    *sf.f._sbf._f._IO_write_ptr = '\0';
-  return ret;
+  return __vsnprintf_internal (s, maxlen, format, ap, mode);
 }
-ldbl_hidden_def (___vsnprintf_chk, __vsnprintf_chk)
 ldbl_strong_alias (___vsnprintf_chk, __vsnprintf_chk)
diff --git a/debug/vsprintf_chk.c b/debug/vsprintf_chk.c
index 53f07236ae..c1b1a8da4f 100644
--- a/debug/vsprintf_chk.c
+++ b/debug/vsprintf_chk.c
@@ -15,75 +15,20 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#include <stdarg.h>
-#include <stdio.h>
-#include "../libio/libioP.h"
-#include "../libio/strfile.h"
-
-
-static int _IO_str_chk_overflow (FILE *fp, int c) __THROW;
-
-static int
-_IO_str_chk_overflow (FILE *fp, int c)
-{
-  /* When we come to here this means the user supplied buffer is
-     filled.  */
-  __chk_fail ();
-}
-
-
-static const struct _IO_jump_t _IO_str_chk_jumps libio_vtable =
-{
-  JUMP_INIT_DUMMY,
-  JUMP_INIT(finish, _IO_str_finish),
-  JUMP_INIT(overflow, _IO_str_chk_overflow),
-  JUMP_INIT(underflow, _IO_str_underflow),
-  JUMP_INIT(uflow, _IO_default_uflow),
-  JUMP_INIT(pbackfail, _IO_str_pbackfail),
-  JUMP_INIT(xsputn, _IO_default_xsputn),
-  JUMP_INIT(xsgetn, _IO_default_xsgetn),
-  JUMP_INIT(seekoff, _IO_str_seekoff),
-  JUMP_INIT(seekpos, _IO_default_seekpos),
-  JUMP_INIT(setbuf, _IO_default_setbuf),
-  JUMP_INIT(sync, _IO_default_sync),
-  JUMP_INIT(doallocate, _IO_default_doallocate),
-  JUMP_INIT(read, _IO_default_read),
-  JUMP_INIT(write, _IO_default_write),
-  JUMP_INIT(seek, _IO_default_seek),
-  JUMP_INIT(close, _IO_default_close),
-  JUMP_INIT(stat, _IO_default_stat),
-  JUMP_INIT(showmanyc, _IO_default_showmanyc),
-  JUMP_INIT(imbue, _IO_default_imbue)
-};
-
+#include <libio/libioP.h>
 
 int
-___vsprintf_chk (char *s, int flags, size_t slen, const char *format,
-		 va_list args)
+___vsprintf_chk (char *s, int flag, size_t slen, const char *format,
+		 va_list ap)
 {
-  _IO_strfile f;
-  int ret;
-#ifdef _IO_MTSAFE_IO
-  f._sbf._f._lock = NULL;
-#endif
+  /* 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;
 
   if (slen == 0)
     __chk_fail ();
 
-  _IO_no_init (&f._sbf._f, _IO_USER_LOCK, -1, NULL, NULL);
-  _IO_JUMPS (&f._sbf) = &_IO_str_chk_jumps;
-  s[0] = '\0';
-  _IO_str_init_static_internal (&f, s, slen - 1, s);
-
-  /* For flags > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
-     can only come from read-only format strings.  */
-  if (flags > 0)
-    f._sbf._f._flags2 |= _IO_FLAGS2_FORTIFY;
-
-  ret = __vfprintf_internal (&f._sbf._f, format, args, 0);
-
-  *f._sbf._f._IO_write_ptr = '\0';
-  return ret;
+  return __vsprintf_internal (s, slen, format, ap, mode);
 }
 ldbl_hidden_def (___vsprintf_chk, __vsprintf_chk)
 ldbl_strong_alias (___vsprintf_chk, __vsprintf_chk)
diff --git a/debug/vswprintf_chk.c b/debug/vswprintf_chk.c
index 4d616f8835..2c6fadd463 100644
--- a/debug/vswprintf_chk.c
+++ b/debug/vswprintf_chk.c
@@ -15,60 +15,21 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#include <stdarg.h>
-#include <wchar.h>
-#include "../libio/libioP.h"
-#include "../libio/strfile.h"
+#include <libio/libioP.h>
 
 
 /* Write formatted output into S, according to the format
    string FORMAT, writing no more than MAXLEN characters.  */
-/* VARARGS5 */
 int
-__vswprintf_chk (wchar_t *s, size_t maxlen, int flags, size_t slen,
-		 const wchar_t *format, va_list args)
+__vswprintf_chk (wchar_t *s, size_t maxlen, int flag, size_t slen,
+		 const wchar_t *format, va_list ap)
 {
-  /* XXX Maybe for less strict version do not fail immediately.
-     Though, maxlen is supposed to be the size of buffer pointed
-     to by s, so a conforming program can't pass such maxlen
-     to *snprintf.  */
   if (__glibc_unlikely (slen < maxlen))
     __chk_fail ();
 
-  _IO_wstrnfile sf;
-  struct _IO_wide_data wd;
-  int ret;
-#ifdef _IO_MTSAFE_IO
-  sf.f._sbf._f._lock = NULL;
-#endif
-
-  /* We need to handle the special case where MAXLEN is 0.  Use the
-     overflow buffer right from the start.  */
-  if (__glibc_unlikely (maxlen == 0))
-    /* Since we have to write at least the terminating L'\0' a buffer
-       length of zero always makes the function fail.  */
-    return -1;
-
-  _IO_no_init (&sf.f._sbf._f, _IO_USER_LOCK, 0, &wd, &_IO_wstrn_jumps);
-  _IO_fwide (&sf.f._sbf._f, 1);
-  s[0] = L'\0';
-
-  /* For flags > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
+  /* For flag > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
      can only come from read-only format strings.  */
-  if (flags > 0)
-    sf.f._sbf._f._flags2 |= _IO_FLAGS2_FORTIFY;
-
-  _IO_wstr_init_static (&sf.f._sbf._f, s, maxlen - 1, s);
-  ret = __vfwprintf_internal ((FILE *) &sf.f._sbf, format, args, 0);
-
-  if (sf.f._sbf._f._wide_data->_IO_buf_base == sf.overflow_buf)
-    /* ISO C99 requires swprintf/vswprintf to return an error if the
-       output does not fit int he provided buffer.  */
-    return -1;
-
-  /* Terminate the string.  */
-  *sf.f._sbf._f._wide_data->_IO_write_ptr = '\0';
+  unsigned int mode = (flag > 0) ? PRINTF_FORTIFY : 0;
 
-  return ret;
+  return __vswprintf_internal (s, maxlen, format, ap, mode);
 }
-libc_hidden_def (__vswprintf_chk)
diff --git a/debug/vwprintf_chk.c b/debug/vwprintf_chk.c
index fedc7a46bf..f1e8878a54 100644
--- a/debug/vwprintf_chk.c
+++ b/debug/vwprintf_chk.c
@@ -15,27 +15,16 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#include <stdarg.h>
-#include <stdio.h>
-#include <wchar.h>
-#include "../libio/libioP.h"
+#include <libio/libioP.h>
 
 
 /* Write formatted output to stdout from the format string FORMAT.  */
 int
 __vwprintf_chk (int flag, const wchar_t *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 = __vfwprintf_internal (stdout, format, ap, 0);
-
-  if (flag > 0)
-    stdout->_flags2 &= ~_IO_FLAGS2_FORTIFY;
-  _IO_release_lock (stdout);
-
-  return done;
+  return __vfwprintf_internal (stdout, format, ap, mode);
 }
diff --git a/debug/wprintf_chk.c b/debug/wprintf_chk.c
index 819050e5af..9f406e95f8 100644
--- a/debug/wprintf_chk.c
+++ b/debug/wprintf_chk.c
@@ -16,29 +16,22 @@
    <http://www.gnu.org/licenses/>.  */
 
 #include <stdarg.h>
-#include <stdio.h>
-#include <wchar.h>
-#include "../libio/libioP.h"
+#include <libio/libioP.h>
 
 
 /* Write formatted output to stdout from the format string FORMAT.  */
 int
 __wprintf_chk (int flag, const wchar_t *format, ...)
 {
+  /* 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;
   va_list ap;
-  int done;
-
-  _IO_acquire_lock_clear_flags2 (stdout);
-  if (flag > 0)
-    stdout->_flags2 |= _IO_FLAGS2_FORTIFY;
+  int ret;
 
   va_start (ap, format);
-  done = __vfwprintf_internal (stdout, format, ap, 0);
+  ret = __vfwprintf_internal (stdout, format, ap, mode);
   va_end (ap);
 
-  if (flag > 0)
-    stdout->_flags2 &= ~_IO_FLAGS2_FORTIFY;
-  _IO_release_lock (stdout);
-
-  return done;
+  return ret;
 }
diff --git a/include/stdio.h b/include/stdio.h
index 93b9385524..22fc916470 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -203,11 +203,6 @@ libc_hidden_proto (__open_memstream)
 libc_hidden_proto (__libc_fatal)
 rtld_hidden_proto (__libc_fatal)
 libc_hidden_proto (__vsprintf_chk)
-libc_hidden_proto (__vsnprintf_chk)
-libc_hidden_proto (__vfprintf_chk)
-libc_hidden_proto (__vasprintf_chk)
-libc_hidden_proto (__vdprintf_chk)
-libc_hidden_proto (__obstack_vprintf_chk)
 
 extern FILE * __fmemopen (void *buf, size_t len, const char *mode);
 libc_hidden_proto (__fmemopen)
diff --git a/include/wchar.h b/include/wchar.h
index 1db0ac8278..90b6e43f18 100644
--- a/include/wchar.h
+++ b/include/wchar.h
@@ -226,8 +226,6 @@ extern int __vswprintf_chk (wchar_t *__restrict __s, size_t __n,
 			    const wchar_t *__restrict __format,
 			    __gnuc_va_list __arg)
      /* __attribute__ ((__format__ (__wprintf__, 5, 0))) */;
-libc_hidden_proto (__vfwprintf_chk)
-libc_hidden_proto (__vswprintf_chk)
 
 extern int __isoc99_fwscanf (__FILE *__restrict __stream,
 			     const wchar_t *__restrict __format, ...);
diff --git a/libio/iovsprintf.c b/libio/iovsprintf.c
index cf4b9973a7..513ca03013 100644
--- a/libio/iovsprintf.c
+++ b/libio/iovsprintf.c
@@ -27,8 +27,47 @@
 #include "libioP.h"
 #include "strfile.h"
 
+static int __THROW
+_IO_str_chk_overflow (FILE *fp, int c)
+{
+  /* If we get here, the user-supplied buffer would be overrun by
+     further output.  */
+  __chk_fail ();
+}
+
+static const struct _IO_jump_t _IO_str_chk_jumps libio_vtable =
+{
+  JUMP_INIT_DUMMY,
+  JUMP_INIT(finish, _IO_str_finish),
+  JUMP_INIT(overflow, _IO_str_chk_overflow),
+  JUMP_INIT(underflow, _IO_str_underflow),
+  JUMP_INIT(uflow, _IO_default_uflow),
+  JUMP_INIT(pbackfail, _IO_str_pbackfail),
+  JUMP_INIT(xsputn, _IO_default_xsputn),
+  JUMP_INIT(xsgetn, _IO_default_xsgetn),
+  JUMP_INIT(seekoff, _IO_str_seekoff),
+  JUMP_INIT(seekpos, _IO_default_seekpos),
+  JUMP_INIT(setbuf, _IO_default_setbuf),
+  JUMP_INIT(sync, _IO_default_sync),
+  JUMP_INIT(doallocate, _IO_default_doallocate),
+  JUMP_INIT(read, _IO_default_read),
+  JUMP_INIT(write, _IO_default_write),
+  JUMP_INIT(seek, _IO_default_seek),
+  JUMP_INIT(close, _IO_default_close),
+  JUMP_INIT(stat, _IO_default_stat),
+  JUMP_INIT(showmanyc, _IO_default_showmanyc),
+  JUMP_INIT(imbue, _IO_default_imbue)
+};
+
+/* This function is called by regular vsprintf with maxlen set to -1,
+   and by vsprintf_chk with maxlen set to the size of the output
+   string.  In the former case, _IO_str_chk_overflow will never be
+   called; in the latter case it will crash the program if the buffer
+   overflows.  */
+
 int
-__vsprintf_internal (char *string, const char *format, va_list args,
+__vsprintf_internal (char *string, size_t maxlen,
+                     const char *format, va_list args,
                      unsigned int mode_flags)
 {
   _IO_strfile sf;
@@ -38,17 +77,22 @@ __vsprintf_internal (char *string, const char *format, va_list args,
   sf._sbf._f._lock = NULL;
 #endif
   _IO_no_init (&sf._sbf._f, _IO_USER_LOCK, -1, NULL, NULL);
-  _IO_JUMPS (&sf._sbf) = &_IO_str_jumps;
-  _IO_str_init_static_internal (&sf, string, -1, string);
+  _IO_JUMPS (&sf._sbf) = &_IO_str_chk_jumps;
+  string[0] = '\0';
+  _IO_str_init_static_internal (&sf, string,
+                                (maxlen == -1) ? -1 : maxlen - 1,
+                                string);
+
   ret = __vfprintf_internal (&sf._sbf._f, format, args, mode_flags);
-  _IO_putc_unlocked ('\0', &sf._sbf._f);
+
+  *sf._sbf._f._IO_write_ptr = '\0';
   return ret;
 }
 
 int
 __vsprintf (char *string, const char *format, va_list args)
 {
-  return __vsprintf_internal (string, format, args, 0);
+  return __vsprintf_internal (string, -1, format, args, 0);
 }
 
 ldbl_strong_alias (__vsprintf, _IO_vsprintf)
diff --git a/libio/libio.h b/libio/libio.h
index 1025f3343e..68dac44635 100644
--- a/libio/libio.h
+++ b/libio/libio.h
@@ -90,7 +90,6 @@ typedef union
 /* Bits for the _flags2 field.  */
 #define _IO_FLAGS2_MMAP 1
 #define _IO_FLAGS2_NOTCANCEL 2
-#define _IO_FLAGS2_FORTIFY 4
 #define _IO_FLAGS2_USER_WBUF 8
 #define _IO_FLAGS2_NOCLOSE 32
 #define _IO_FLAGS2_CLOEXEC 64
diff --git a/libio/libioP.h b/libio/libioP.h
index 17eda383d3..07b60e3e26 100644
--- a/libio/libioP.h
+++ b/libio/libioP.h
@@ -672,8 +672,13 @@ extern int __vdprintf_internal (int d, const char *format, va_list ap,
 extern int __obstack_vprintf_internal (struct obstack *ob, const char *fmt,
                                        va_list ap, unsigned int mode_flags);
 
-extern int __vsprintf_internal (char *string, const char *format, va_list ap,
+/* Note: __vsprintf_internal, unlike vsprintf, does take a maxlen argument,
+   because it's called by both vsprintf and vsprintf_chk.  If maxlen is
+   not set to -1, overrunning the buffer will cause a prompt crash.  */
+extern int __vsprintf_internal (char *string, size_t maxlen,
+                                const char *format, va_list ap,
                                 unsigned int mode_flags);
+
 extern int __vsnprintf_internal (char *string, size_t maxlen,
                                  const char *format, va_list ap,
                                  unsigned int mode_flags);
@@ -788,26 +793,10 @@ _IO_acquire_lock_fct (FILE **p)
     _IO_funlockfile (fp);
 }
 
-static inline void
-__attribute__ ((__always_inline__))
-_IO_acquire_lock_clear_flags2_fct (FILE **p)
-{
-  FILE *fp = *p;
-  fp->_flags2 &= ~(_IO_FLAGS2_FORTIFY);
-  if ((fp->_flags & _IO_USER_LOCK) == 0)
-    _IO_funlockfile (fp);
-}
-
 #if !defined _IO_MTSAFE_IO && IS_IN (libc)
 # define _IO_acquire_lock(_fp)						      \
-  do {									      \
-    FILE *_IO_acquire_lock_file = NULL
-# define _IO_acquire_lock_clear_flags2(_fp)				      \
-  do {									      \
-    FILE *_IO_acquire_lock_file = (_fp)
+  do {
 # define _IO_release_lock(_fp)						      \
-    if (_IO_acquire_lock_file != NULL)					      \
-      _IO_acquire_lock_file->_flags2 &= ~(_IO_FLAGS2_FORTIFY);		      \
   } while (0)
 #endif
 
diff --git a/stdio-common/sprintf.c b/stdio-common/sprintf.c
index 77423b292f..447faa4e25 100644
--- a/stdio-common/sprintf.c
+++ b/stdio-common/sprintf.c
@@ -27,7 +27,7 @@ __sprintf (char *s, const char *format, ...)
   int done;
 
   va_start (arg, format);
-  done = __vsprintf_internal (s, format, arg, 0);
+  done = __vsprintf_internal (s, -1, format, arg, 0);
   va_end (arg);
 
   return done;
diff --git a/stdio-common/vfprintf-internal.c b/stdio-common/vfprintf-internal.c
index 6f7bd0d2da..2d9f474386 100644
--- a/stdio-common/vfprintf-internal.c
+++ b/stdio-common/vfprintf-internal.c
@@ -1302,12 +1302,6 @@ vfprintf (FILE *s, const CHAR_T *format, va_list ap, unsigned int mode_flags)
      0 if unknown.  */
   int readonly_format = 0;
 
-  /* Temporarily honor environmental settings.  */
-  if (__ldbl_is_dbl)
-    mode_flags |= PRINTF_LDBL_IS_DBL;
-  if (s->_flags2 & _IO_FLAGS2_FORTIFY)
-    mode_flags |= PRINTF_FORTIFY;
-
   /* Orient the stream.  */
 #ifdef ORIENT
   ORIENT;
diff --git a/sysdeps/generic/math_ldbl_opt.h b/sysdeps/generic/math_ldbl_opt.h
index 92f670dff7..fbd2c82e2f 100644
--- a/sysdeps/generic/math_ldbl_opt.h
+++ b/sysdeps/generic/math_ldbl_opt.h
@@ -15,4 +15,3 @@
 #define ldbl_weak_alias(name, aliasname) weak_alias (name, aliasname)
 #define ldbl_compat_symbol(lib, local, symbol, version) \
   compat_symbol (lib, local, symbol, version)
-#define __ldbl_is_dbl 0
diff --git a/sysdeps/generic/stdio-lock.h b/sysdeps/generic/stdio-lock.h
index 4a40618545..25ccd07f29 100644
--- a/sysdeps/generic/stdio-lock.h
+++ b/sysdeps/generic/stdio-lock.h
@@ -54,15 +54,8 @@ __libc_lock_define_recursive (typedef, _IO_lock_t)
 	__attribute__((cleanup (_IO_acquire_lock_fct)))			      \
 	= (_fp);							      \
     _IO_flockfile (_IO_acquire_lock_file);
-#  define _IO_acquire_lock_clear_flags2(_fp) \
-  do {									      \
-    FILE *_IO_acquire_lock_file						      \
-	__attribute__((cleanup (_IO_acquire_lock_clear_flags2_fct)))	      \
-	= (_fp);							      \
-    _IO_flockfile (_IO_acquire_lock_file);
 # else
 #  define _IO_acquire_lock(_fp) _IO_acquire_lock_needs_exceptions_enabled
-#  define _IO_acquire_lock_clear_flags2(_fp) _IO_acquire_lock (_fp)
 # endif
 # define _IO_release_lock(_fp) ; } while (0)
 
diff --git a/sysdeps/ieee754/ldbl-opt/Makefile b/sysdeps/ieee754/ldbl-opt/Makefile
index ef790adc77..8fedbb82d9 100644
--- a/sysdeps/ieee754/ldbl-opt/Makefile
+++ b/sysdeps/ieee754/ldbl-opt/Makefile
@@ -8,7 +8,7 @@ endif
 
 ifeq ($(subdir),math)
 libm-routines += s_nexttowardfd
-routines += math_ldbl_opt nldbl-compat
+routines += nldbl-compat
 
 extra-libs += libnldbl
 libnldbl-calls = asprintf dprintf fprintf fscanf fwprintf fwscanf iovfscanf \
diff --git a/sysdeps/ieee754/ldbl-opt/math_ldbl_opt.h b/sysdeps/ieee754/ldbl-opt/math_ldbl_opt.h
index 70471e94ea..53e40af3e7 100644
--- a/sysdeps/ieee754/ldbl-opt/math_ldbl_opt.h
+++ b/sysdeps/ieee754/ldbl-opt/math_ldbl_opt.h
@@ -38,10 +38,3 @@
   weak_alias (local, symbol)
 # endif
 #endif
-
-#ifndef __ASSEMBLER__
-/* Set temporarily to non-zero if long double should be considered
-   the same as double.  */
-extern __thread int __no_long_double attribute_tls_model_ie attribute_hidden;
-# define __ldbl_is_dbl __builtin_expect (__no_long_double, 0)
-#endif
diff --git a/sysdeps/ieee754/ldbl-opt/nldbl-compat.c b/sysdeps/ieee754/ldbl-opt/nldbl-compat.c
index 17fc49a249..450fcd7131 100644
--- a/sysdeps/ieee754/ldbl-opt/nldbl-compat.c
+++ b/sysdeps/ieee754/ldbl-opt/nldbl-compat.c
@@ -45,7 +45,6 @@ libc_hidden_proto (__nldbl_obstack_vprintf)
 libc_hidden_proto (__nldbl___vfwprintf_chk)
 libc_hidden_proto (__nldbl___vsnprintf_chk)
 libc_hidden_proto (__nldbl___vfprintf_chk)
-libc_hidden_proto (__nldbl___vsyslog_chk)
 libc_hidden_proto (__nldbl___vsprintf_chk)
 libc_hidden_proto (__nldbl___vswprintf_chk)
 libc_hidden_proto (__nldbl___vasprintf_chk)
@@ -56,17 +55,6 @@ libc_hidden_proto (__nldbl___isoc99_vfscanf)
 libc_hidden_proto (__nldbl___isoc99_vswscanf)
 libc_hidden_proto (__nldbl___isoc99_vfwscanf)
 
-static void
-__nldbl_cleanup (void *arg)
-{
-  __no_long_double = 0;
-}
-
-#define set_no_long_double() \
-  __libc_cleanup_push (__nldbl_cleanup, NULL); __no_long_double = 1
-#define clear_no_long_double() \
-  __no_long_double = 0; __libc_cleanup_pop (0)
-
 /* Compatibility with IEEE double as long double.
    IEEE quad long double is used by default for most programs, so
    we don't need to split this into one file per function for the
@@ -76,14 +64,14 @@ int
 attribute_compat_text_section
 __nldbl___asprintf (char **string_ptr, const char *fmt, ...)
 {
-  va_list arg;
-  int done;
+  va_list ap;
+  int ret;
 
-  va_start (arg, fmt);
-  done = __nldbl_vasprintf (string_ptr, fmt, arg);
-  va_end (arg);
+  va_start (ap, fmt);
+  ret = __vasprintf_internal (string_ptr, fmt, ap, PRINTF_LDBL_IS_DBL);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
 weak_alias (__nldbl___asprintf, __nldbl_asprintf)
 
@@ -91,28 +79,28 @@ int
 attribute_compat_text_section
 __nldbl_dprintf (int d, const char *fmt, ...)
 {
-  va_list arg;
-  int done;
+  va_list ap;
+  int ret;
 
-  va_start (arg, fmt);
-  done = __nldbl_vdprintf (d, fmt, arg);
-  va_end (arg);
+  va_start (ap, fmt);
+  ret = __vdprintf_internal (d, fmt, ap, PRINTF_LDBL_IS_DBL);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
 
 int
 attribute_compat_text_section
 __nldbl_fprintf (FILE *stream, const char *fmt, ...)
 {
-  va_list arg;
-  int done;
+  va_list ap;
+  int ret;
 
-  va_start (arg, fmt);
-  done = __nldbl_vfprintf (stream, fmt, arg);
-  va_end (arg);
+  va_start (ap, fmt);
+  ret = __vfprintf_internal (stream, fmt, ap, PRINTF_LDBL_IS_DBL);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
 weak_alias (__nldbl_fprintf, __nldbl__IO_fprintf)
 
@@ -120,28 +108,28 @@ int
 attribute_compat_text_section weak_function
 __nldbl_fwprintf (FILE *stream, const wchar_t *fmt, ...)
 {
-  va_list arg;
-  int done;
+  va_list ap;
+  int ret;
 
-  va_start (arg, fmt);
-  done = __nldbl_vfwprintf (stream, fmt, arg);
-  va_end (arg);
+  va_start (ap, fmt);
+  ret = __vfwprintf_internal (stream, fmt, ap, PRINTF_LDBL_IS_DBL);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
 
 int
 attribute_compat_text_section
 __nldbl_printf (const char *fmt, ...)
 {
-  va_list arg;
-  int done;
+  va_list ap;
+  int ret;
 
-  va_start (arg, fmt);
-  done = __nldbl_vfprintf (stdout, fmt, arg);
-  va_end (arg);
+  va_start (ap, fmt);
+  ret = __vfprintf_internal (stdout, fmt, ap, PRINTF_LDBL_IS_DBL);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
 strong_alias (__nldbl_printf, __nldbl__IO_printf)
 
@@ -149,14 +137,14 @@ int
 attribute_compat_text_section
 __nldbl_sprintf (char *s, const char *fmt, ...)
 {
-  va_list arg;
-  int done;
+  va_list ap;
+  int ret;
 
-  va_start (arg, fmt);
-  done = __nldbl_vsprintf (s, fmt, arg);
-  va_end (arg);
+  va_start (ap, fmt);
+  ret = __vsprintf_internal (s, -1, fmt, ap, PRINTF_LDBL_IS_DBL);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
 strong_alias (__nldbl_sprintf, __nldbl__IO_sprintf)
 
@@ -164,11 +152,7 @@ int
 attribute_compat_text_section
 __nldbl_vfprintf (FILE *s, const char *fmt, va_list ap)
 {
-  int done;
-  set_no_long_double ();
-  done = __vfprintf_internal (s, fmt, ap, 0);
-  clear_no_long_double ();
-  return done;
+  return __vfprintf_internal (s, fmt, ap, PRINTF_LDBL_IS_DBL);
 }
 libc_hidden_def (__nldbl_vfprintf)
 strong_alias (__nldbl_vfprintf, __nldbl__IO_vfprintf)
@@ -177,11 +161,7 @@ int
 attribute_compat_text_section
 __nldbl___vsprintf (char *string, const char *fmt, va_list ap)
 {
-  int done;
-  __no_long_double = 1;
-  done = __vsprintf_internal (string, fmt, ap, 0);
-  __no_long_double = 0;
-  return done;
+  return __vsprintf_internal (string, -1, fmt, ap, PRINTF_LDBL_IS_DBL);
 }
 strong_alias (__nldbl___vsprintf, __nldbl__IO_vsprintf)
 weak_alias (__nldbl___vsprintf, __nldbl_vsprintf)
@@ -192,11 +172,7 @@ attribute_compat_text_section
 __nldbl_obstack_vprintf (struct obstack *obstack, const char *fmt,
 			 va_list ap)
 {
-  int done;
-  __no_long_double = 1;
-  done = __obstack_vprintf_internal (obstack, fmt, ap, 0);
-  __no_long_double = 0;
-  return done;
+  return __obstack_vprintf_internal (obstack, fmt, ap, PRINTF_LDBL_IS_DBL);
 }
 libc_hidden_def (__nldbl_obstack_vprintf)
 
@@ -204,63 +180,55 @@ int
 attribute_compat_text_section
 __nldbl_obstack_printf (struct obstack *obstack, const char *fmt, ...)
 {
-  int result;
+  int ret;
   va_list ap;
   va_start (ap, fmt);
-  result = __nldbl_obstack_vprintf (obstack, fmt, ap);
+  ret = __obstack_vprintf_internal (obstack, fmt, ap, PRINTF_LDBL_IS_DBL);
   va_end (ap);
-  return result;
+  return ret;
 }
 
 int
 attribute_compat_text_section weak_function
 __nldbl_snprintf (char *s, size_t maxlen, const char *fmt, ...)
 {
-  va_list arg;
-  int done;
+  va_list ap;
+  int ret;
 
-  va_start (arg, fmt);
-  done = __nldbl_vsnprintf (s, maxlen, fmt, arg);
-  va_end (arg);
+  va_start (ap, fmt);
+  ret = __vsnprintf_internal (s, maxlen, fmt, ap, PRINTF_LDBL_IS_DBL);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
 
 int
 attribute_compat_text_section
 __nldbl_swprintf (wchar_t *s, size_t n, const wchar_t *fmt, ...)
 {
-  va_list arg;
-  int done;
+  va_list ap;
+  int ret;
 
-  va_start (arg, fmt);
-  done = __nldbl_vswprintf (s, n, fmt, arg);
-  va_end (arg);
+  va_start (ap, fmt);
+  ret = __vswprintf_internal (s, n, fmt, ap, PRINTF_LDBL_IS_DBL);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
 
 int
 attribute_compat_text_section weak_function
 __nldbl_vasprintf (char **result_ptr, const char *fmt, va_list ap)
 {
-  int res;
-  __no_long_double = 1;
-  res = __vasprintf_internal (result_ptr, fmt, ap, 0);
-  __no_long_double = 0;
-  return res;
+  return __vasprintf_internal (result_ptr, fmt, ap, PRINTF_LDBL_IS_DBL);
 }
 libc_hidden_def (__nldbl_vasprintf)
 
 int
 attribute_compat_text_section
-__nldbl_vdprintf (int d, const char *fmt, va_list arg)
+__nldbl_vdprintf (int d, const char *fmt, va_list ap)
 {
-  int res;
-  set_no_long_double ();
-  res = __vdprintf_internal (d, fmt, arg, 0);
-  clear_no_long_double ();
-  return res;
+  return __vdprintf_internal (d, fmt, ap, PRINTF_LDBL_IS_DBL);
 }
 libc_hidden_def (__nldbl_vdprintf)
 
@@ -268,11 +236,7 @@ int
 attribute_compat_text_section weak_function
 __nldbl_vfwprintf (FILE *s, const wchar_t *fmt, va_list ap)
 {
-  int res;
-  set_no_long_double ();
-  res = __vfwprintf_internal (s, fmt, ap, 0);
-  clear_no_long_double ();
-  return res;
+  return __vfwprintf_internal (s, fmt, ap, PRINTF_LDBL_IS_DBL);
 }
 libc_hidden_def (__nldbl_vfwprintf)
 
@@ -280,7 +244,7 @@ int
 attribute_compat_text_section
 __nldbl_vprintf (const char *fmt, va_list ap)
 {
-  return __nldbl_vfprintf (stdout, fmt, ap);
+  return __vfprintf_internal (stdout, fmt, ap, PRINTF_LDBL_IS_DBL);
 }
 
 int
@@ -288,11 +252,7 @@ attribute_compat_text_section
 __nldbl_vsnprintf (char *string, size_t maxlen, const char *fmt,
 		   va_list ap)
 {
-  int res;
-  __no_long_double = 1;
-  res = __vsnprintf_internal (string, maxlen, fmt, ap, 0);
-  __no_long_double = 0;
-  return res;
+  return __vsnprintf_internal (string, maxlen, fmt, ap, PRINTF_LDBL_IS_DBL);
 }
 libc_hidden_def (__nldbl_vsnprintf)
 weak_alias (__nldbl_vsnprintf, __nldbl___vsnprintf)
@@ -302,11 +262,7 @@ attribute_compat_text_section weak_function
 __nldbl_vswprintf (wchar_t *string, size_t maxlen, const wchar_t *fmt,
 		   va_list ap)
 {
-  int res;
-  __no_long_double = 1;
-  res = __vswprintf_internal (string, maxlen, fmt, ap, 0);
-  __no_long_double = 0;
-  return res;
+  return __vswprintf_internal (string, maxlen, fmt, ap, PRINTF_LDBL_IS_DBL);
 }
 libc_hidden_def (__nldbl_vswprintf)
 
@@ -314,21 +270,21 @@ int
 attribute_compat_text_section
 __nldbl_vwprintf (const wchar_t *fmt, va_list ap)
 {
-  return __nldbl_vfwprintf (stdout, fmt, ap);
+  return __vfwprintf_internal (stdout, fmt, ap, PRINTF_LDBL_IS_DBL);
 }
 
 int
 attribute_compat_text_section
 __nldbl_wprintf (const wchar_t *fmt, ...)
 {
-  va_list arg;
-  int done;
+  va_list ap;
+  int ret;
 
-  va_start (arg, fmt);
-  done = __nldbl_vfwprintf (stdout, fmt, arg);
-  va_end (arg);
+  va_start (ap, fmt);
+  ret = __vfwprintf_internal (stdout, fmt, ap, PRINTF_LDBL_IS_DBL);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
 
 #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_28)
@@ -491,42 +447,51 @@ int
 attribute_compat_text_section
 __nldbl___fprintf_chk (FILE *stream, int flag, const char *fmt, ...)
 {
-  va_list arg;
-  int done;
+  va_list ap;
+  int ret;
+  unsigned int mode = PRINTF_LDBL_IS_DBL;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
 
-  va_start (arg, fmt);
-  done = __nldbl___vfprintf_chk (stream, flag, fmt, arg);
-  va_end (arg);
+  va_start (ap, fmt);
+  ret = __vfprintf_internal (stream, fmt, ap, mode);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
 
 int
 attribute_compat_text_section
 __nldbl___fwprintf_chk (FILE *stream, int flag, const wchar_t *fmt, ...)
 {
-  va_list arg;
-  int done;
+  va_list ap;
+  int ret;
+  unsigned int mode = PRINTF_LDBL_IS_DBL;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
 
-  va_start (arg, fmt);
-  done = __nldbl___vfwprintf_chk (stream, flag, fmt, arg);
-  va_end (arg);
+  va_start (ap, fmt);
+  ret = __vfwprintf_internal (stream, fmt, ap, mode);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
 
 int
 attribute_compat_text_section
 __nldbl___printf_chk (int flag, const char *fmt, ...)
 {
-  va_list arg;
-  int done;
+  va_list ap;
+  int ret;
+  unsigned int mode = PRINTF_LDBL_IS_DBL;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
 
-  va_start (arg, fmt);
-  done = __nldbl___vfprintf_chk (stdout, flag, fmt, arg);
-  va_end (arg);
+  va_start (ap, fmt);
+  ret = __vfprintf_internal (stdout, fmt, ap, mode);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
 
 int
@@ -534,54 +499,72 @@ attribute_compat_text_section
 __nldbl___snprintf_chk (char *s, size_t maxlen, int flag, size_t slen,
 			const char *fmt, ...)
 {
-  va_list arg;
-  int done;
+  if (__glibc_unlikely (slen < maxlen))
+    __chk_fail ();
+
+  va_list ap;
+  int ret;
+  unsigned int mode = PRINTF_LDBL_IS_DBL;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
 
-  va_start (arg, fmt);
-  done = __nldbl___vsnprintf_chk (s, maxlen, flag, slen, fmt, arg);
-  va_end (arg);
+  va_start (ap, fmt);
+  ret = __vsnprintf_internal (s, maxlen, fmt, ap, mode);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
 
 int
 attribute_compat_text_section
 __nldbl___sprintf_chk (char *s, int flag, size_t slen, const char *fmt, ...)
 {
-  va_list arg;
-  int done;
+  if (slen == 0)
+    __chk_fail ();
 
-  va_start (arg, fmt);
-  done = __nldbl___vsprintf_chk (s, flag, slen, fmt, arg);
-  va_end (arg);
+  va_list ap;
+  int ret;
+  unsigned int mode = PRINTF_LDBL_IS_DBL;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  va_start (ap, fmt);
+  ret = __vsprintf_internal (s, slen, fmt, ap, mode);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
 
 int
 attribute_compat_text_section
-__nldbl___swprintf_chk (wchar_t *s, size_t n, int flag, size_t slen,
+__nldbl___swprintf_chk (wchar_t *s, size_t maxlen, int flag, size_t slen,
 			const wchar_t *fmt, ...)
 {
-  va_list arg;
-  int done;
+  if (__glibc_unlikely (slen < maxlen))
+    __chk_fail ();
+
+  va_list ap;
+  int ret;
+  unsigned int mode = PRINTF_LDBL_IS_DBL;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
 
-  va_start (arg, fmt);
-  done = __nldbl___vswprintf_chk (s, n, flag, slen, fmt, arg);
-  va_end (arg);
+  va_start (ap, fmt);
+  ret = __vswprintf_internal (s, maxlen, fmt, ap, mode);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
 
 int
 attribute_compat_text_section
 __nldbl___vfprintf_chk (FILE *s, int flag, const char *fmt, va_list ap)
 {
-  int res;
-  set_no_long_double ();
-  res = __vfprintf_chk (s, flag, fmt, ap);
-  clear_no_long_double ();
-  return res;
+  unsigned int mode = PRINTF_LDBL_IS_DBL;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  return __vfprintf_internal (s, fmt, ap, mode);
 }
 libc_hidden_def (__nldbl___vfprintf_chk)
 
@@ -589,11 +572,11 @@ int
 attribute_compat_text_section
 __nldbl___vfwprintf_chk (FILE *s, int flag, const wchar_t *fmt, va_list ap)
 {
-  int res;
-  set_no_long_double ();
-  res = __vfwprintf_chk (s, flag, fmt, ap);
-  clear_no_long_double ();
-  return res;
+  unsigned int mode = PRINTF_LDBL_IS_DBL;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  return __vfwprintf_internal (s, fmt, ap, mode);
 }
 libc_hidden_def (__nldbl___vfwprintf_chk)
 
@@ -601,7 +584,11 @@ int
 attribute_compat_text_section
 __nldbl___vprintf_chk (int flag, const char *fmt, va_list ap)
 {
-  return __nldbl___vfprintf_chk (stdout, flag, fmt, ap);
+  unsigned int mode = PRINTF_LDBL_IS_DBL;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  return __vfprintf_internal (stdout, fmt, ap, mode);
 }
 
 int
@@ -609,11 +596,14 @@ attribute_compat_text_section
 __nldbl___vsnprintf_chk (char *string, size_t maxlen, int flag, size_t slen,
 			 const char *fmt, va_list ap)
 {
-  int res;
-  __no_long_double = 1;
-  res = __vsnprintf_chk (string, maxlen, flag, slen, fmt, ap);
-  __no_long_double = 0;
-  return res;
+  if (__glibc_unlikely (slen < maxlen))
+    __chk_fail ();
+
+  unsigned int mode = PRINTF_LDBL_IS_DBL;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  return __vsnprintf_internal (string, maxlen, fmt, ap, mode);
 }
 libc_hidden_def (__nldbl___vsnprintf_chk)
 
@@ -622,11 +612,14 @@ attribute_compat_text_section
 __nldbl___vsprintf_chk (char *string, int flag, size_t slen, const char *fmt,
 			va_list ap)
 {
-  int res;
-  __no_long_double = 1;
-  res = __vsprintf_chk (string, flag, slen, fmt, ap);
-  __no_long_double = 0;
-  return res;
+  if (slen == 0)
+    __chk_fail ();
+
+  unsigned int mode = PRINTF_LDBL_IS_DBL;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  return __vsprintf_internal (string, slen, fmt, ap, mode);
 }
 libc_hidden_def (__nldbl___vsprintf_chk)
 
@@ -635,11 +628,14 @@ attribute_compat_text_section
 __nldbl___vswprintf_chk (wchar_t *string, size_t maxlen, int flag, size_t slen,
 			 const wchar_t *fmt, va_list ap)
 {
-  int res;
-  __no_long_double = 1;
-  res = __vswprintf_chk (string, maxlen, flag, slen, fmt, ap);
-  __no_long_double = 0;
-  return res;
+  if (__glibc_unlikely (slen < maxlen))
+    __chk_fail ();
+
+  unsigned int mode = PRINTF_LDBL_IS_DBL;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  return __vswprintf_internal (string, maxlen, fmt, ap, mode);
 }
 libc_hidden_def (__nldbl___vswprintf_chk)
 
@@ -647,32 +643,39 @@ int
 attribute_compat_text_section
 __nldbl___vwprintf_chk (int flag, const wchar_t *fmt, va_list ap)
 {
-  return __nldbl___vfwprintf_chk (stdout, flag, fmt, ap);
+  unsigned int mode = PRINTF_LDBL_IS_DBL;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  return __vfwprintf_internal (stdout, fmt, ap, mode);
 }
 
 int
 attribute_compat_text_section
 __nldbl___wprintf_chk (int flag, const wchar_t *fmt, ...)
 {
-  va_list arg;
-  int done;
+  va_list ap;
+  int ret;
+  unsigned int mode = PRINTF_LDBL_IS_DBL;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
 
-  va_start (arg, fmt);
-  done = __nldbl___vfwprintf_chk (stdout, flag, fmt, arg);
-  va_end (arg);
+  va_start (ap, fmt);
+  ret = __vfwprintf_internal (stdout, fmt, ap, mode);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
 
 int
 attribute_compat_text_section
-__nldbl___vasprintf_chk (char **ptr, int flag, const char *fmt, va_list arg)
+__nldbl___vasprintf_chk (char **ptr, int flag, const char *fmt, va_list ap)
 {
-  int res;
-  __no_long_double = 1;
-  res = __vasprintf_chk (ptr, flag, fmt, arg);
-  __no_long_double = 0;
-  return res;
+  unsigned int mode = PRINTF_LDBL_IS_DBL;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  return __vasprintf_internal (ptr, fmt, ap, mode);
 }
 libc_hidden_def (__nldbl___vasprintf_chk)
 
@@ -680,25 +683,28 @@ int
 attribute_compat_text_section
 __nldbl___asprintf_chk (char **ptr, int flag, const char *fmt, ...)
 {
-  va_list arg;
-  int done;
+  va_list ap;
+  int ret;
+  unsigned int mode = PRINTF_LDBL_IS_DBL;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
 
-  va_start (arg, fmt);
-  done = __nldbl___vasprintf_chk (ptr, flag, fmt, arg);
-  va_end (arg);
+  va_start (ap, fmt);
+  ret = __vasprintf_internal (ptr, fmt, ap, mode);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
 
 int
 attribute_compat_text_section
-__nldbl___vdprintf_chk (int d, int flag, const char *fmt, va_list arg)
+__nldbl___vdprintf_chk (int d, int flag, const char *fmt, va_list ap)
 {
-  int res;
-  set_no_long_double ();
-  res = __vdprintf_chk (d, flag, fmt, arg);
-  clear_no_long_double ();
-  return res;
+  unsigned int mode = PRINTF_LDBL_IS_DBL;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  return __vdprintf_internal (d, fmt, ap, mode);
 }
 libc_hidden_def (__nldbl___vdprintf_chk)
 
@@ -706,26 +712,29 @@ int
 attribute_compat_text_section
 __nldbl___dprintf_chk (int d, int flag, const char *fmt, ...)
 {
-  va_list arg;
-  int done;
+  va_list ap;
+  int ret;
+  unsigned int mode = PRINTF_LDBL_IS_DBL;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
 
-  va_start (arg, fmt);
-  done = __nldbl___vdprintf_chk (d, flag, fmt, arg);
-  va_end (arg);
+  va_start (ap, fmt);
+  ret = __vdprintf_internal (d, fmt, ap, mode);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
 
 int
 attribute_compat_text_section
 __nldbl___obstack_vprintf_chk (struct obstack *obstack, int flag,
-			       const char *fmt, va_list arg)
+			       const char *fmt, va_list ap)
 {
-  int res;
-  __no_long_double = 1;
-  res = __obstack_vprintf_chk (obstack, flag, fmt, arg);
-  __no_long_double = 0;
-  return res;
+  unsigned int mode = PRINTF_LDBL_IS_DBL;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
+
+  return __obstack_vprintf_internal (obstack, fmt, ap, mode);
 }
 libc_hidden_def (__nldbl___obstack_vprintf_chk)
 
@@ -734,14 +743,17 @@ attribute_compat_text_section
 __nldbl___obstack_printf_chk (struct obstack *obstack, int flag,
 			      const char *fmt, ...)
 {
-  va_list arg;
-  int done;
+  va_list ap;
+  int ret;
+  unsigned int mode = PRINTF_LDBL_IS_DBL;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
 
-  va_start (arg, fmt);
-  done = __nldbl___obstack_vprintf_chk (obstack, flag, fmt, arg);
-  va_end (arg);
+  va_start (ap, fmt);
+  ret = __obstack_vprintf_internal (obstack, fmt, ap, mode);
+  va_end (ap);
 
-  return done;
+  return ret;
 }
 
 extern __typeof (printf_size) __printf_size;
@@ -823,18 +835,28 @@ __nldbl_syslog (int pri, const char *fmt, ...)
 {
   va_list ap;
   va_start (ap, fmt);
-  __nldbl___vsyslog_chk (pri, -1, fmt, ap);
+  __vsyslog_internal (pri, fmt, ap, PRINTF_LDBL_IS_DBL);
   va_end (ap);
 }
 
 void
 attribute_compat_text_section
+__nldbl_vsyslog (int pri, const char *fmt, va_list ap)
+{
+  __vsyslog_internal (pri, fmt, ap, PRINTF_LDBL_IS_DBL);
+}
+
+void
+attribute_compat_text_section
 __nldbl___syslog_chk (int pri, int flag, const char *fmt, ...)
 {
   va_list ap;
+  unsigned int mode = PRINTF_LDBL_IS_DBL;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
 
   va_start (ap, fmt);
-  __nldbl___vsyslog_chk (pri, flag, fmt, ap);
+  __vsyslog_internal (pri, fmt, ap, mode);
   va_end(ap);
 }
 
@@ -842,17 +864,11 @@ void
 attribute_compat_text_section
 __nldbl___vsyslog_chk (int pri, int flag, const char *fmt, va_list ap)
 {
-  set_no_long_double ();
-  __vsyslog_internal (pri, fmt, ap, (flag > 0) ? PRINTF_FORTIFY : 0);
-  clear_no_long_double ();
-}
-libc_hidden_def (__nldbl___vsyslog_chk)
+  unsigned int mode = PRINTF_LDBL_IS_DBL;
+  if (flag > 0)
+    mode |= PRINTF_FORTIFY;
 
-void
-attribute_compat_text_section
-__nldbl_vsyslog (int pri, const char *fmt, va_list ap)
-{
-  __nldbl___vsyslog_chk (pri, -1, fmt, ap);
+  __vsyslog_internal (pri, fmt, ap, mode);
 }
 
 int
diff --git a/sysdeps/nptl/stdio-lock.h b/sysdeps/nptl/stdio-lock.h
index 5b9782452f..1d6a81c5bf 100644
--- a/sysdeps/nptl/stdio-lock.h
+++ b/sysdeps/nptl/stdio-lock.h
@@ -94,15 +94,8 @@ typedef struct { int lock; int cnt; void *owner; } _IO_lock_t;
 	__attribute__((cleanup (_IO_acquire_lock_fct)))			      \
 	= (_fp);							      \
     _IO_flockfile (_IO_acquire_lock_file);
-#  define _IO_acquire_lock_clear_flags2(_fp) \
-  do {									      \
-    FILE *_IO_acquire_lock_file						      \
-	__attribute__((cleanup (_IO_acquire_lock_clear_flags2_fct)))	      \
-	= (_fp);							      \
-    _IO_flockfile (_IO_acquire_lock_file);
 # else
 #  define _IO_acquire_lock(_fp) _IO_acquire_lock_needs_exceptions_enabled
-#  define _IO_acquire_lock_clear_flags2(_fp) _IO_acquire_lock (_fp)
 # endif
 # define _IO_release_lock(_fp) ; } while (0)