1 files changed, 91 insertions, 0 deletions
diff --git a/debug/vsprintf_chk.c b/debug/vsprintf_chk.c
new file mode 100644
index 0000000..8338328
--- /dev/null
+++ b/debug/vsprintf_chk.c
@@ -0,0 +1,91 @@
+/* Copyright (C) 1994, 1997, 1999-2003, 2004 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
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <stdarg.h>
+#include <stdio.h>
+#include "../libio/libioP.h"
+#include "../libio/strfile.h"
+
+
+static int _IO_str_chk_overflow (_IO_FILE *fp, int c) __THROW;
+
+static int
+_IO_str_chk_overflow (fp, c)
+     _IO_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 =
+{
+  JUMP_INIT_DUMMY,
+  JUMP_INIT(finish, _IO_str_finish),
+  JUMP_INIT(overflow, _IO_str_chk_overflow),
+  JUMP_INIT(underflow, INTUSE(_IO_str_underflow)),
+  JUMP_INIT(uflow, INTUSE(_IO_default_uflow)),
+  JUMP_INIT(pbackfail, INTUSE(_IO_str_pbackfail)),
+  JUMP_INIT(xsputn, INTUSE(_IO_default_xsputn)),
+  JUMP_INIT(xsgetn, INTUSE(_IO_default_xsgetn)),
+  JUMP_INIT(seekoff, INTUSE(_IO_str_seekoff)),
+  JUMP_INIT(seekpos, _IO_default_seekpos),
+  JUMP_INIT(setbuf, _IO_default_setbuf),
+  JUMP_INIT(sync, _IO_default_sync),
+  JUMP_INIT(doallocate, INTUSE(_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)
+};
+
+
+int
+__vsprintf_chk (char *s, int flags, size_t slen, const char *format,
+		va_list args)
+{
+  _IO_strfile f;
+  int ret;
+#ifdef _IO_MTSAFE_IO
+  f._sbf._f._lock = NULL;
+#endif
+
+  if (slen == 0)
+    __chk_fail ();
+
+  _IO_no_init (&f._sbf._f, _IO_USER_LOCK, -1, NULL, NULL);
+  _IO_JUMPS ((struct _IO_FILE_plus *) &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_CHECK_PERCENT_N;
+
+  ret = INTUSE(_IO_vfprintf) ((_IO_FILE *) &f._sbf, format, args);
+
+  *f._sbf._f._IO_write_ptr = '\0';
+  return ret;
+}
+libc_hidden_def (__vsprintf_chk)