1 files changed, 54 insertions, 0 deletions
diff --git a/debug/fgetws_chk.c b/debug/fgetws_chk.c
new file mode 100644
index 0000000000..d080ccb473
--- /dev/null
+++ b/debug/fgetws_chk.c
@@ -0,0 +1,54 @@
+/* Copyright (C) 1993, 1995, 1996, 1997, 1998, 1999, 2001, 2005
+   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 "libioP.h"
+#include <wchar.h>
+#include <sys/param.h>
+
+wchar_t *
+__fgetws_chk (wchar_t *buf, size_t size, int n, _IO_FILE *fp)
+{
+  _IO_size_t count;
+  wchar_t *result;
+  int old_error;
+  CHECK_FILE (fp, NULL);
+  if (n <= 0)
+    return NULL;
+  _IO_acquire_lock (fp);
+  /* This is very tricky since a file descriptor may be in the
+     non-blocking mode. The error flag doesn't mean much in this
+     case. We return an error only when there is a new error. */
+  old_error = fp->_IO_file_flags & _IO_ERR_SEEN;
+  fp->_IO_file_flags &= ~_IO_ERR_SEEN;
+  count = _IO_getwline (fp, buf, MIN ((size_t) n - 1, size), L'\n', 1);
+  /* If we read in some bytes and errno is EAGAIN, that error will
+     be reported for next read. */
+  if (count == 0 || (_IO_ferror_unlocked (fp) && errno != EAGAIN))
+    result = NULL;
+  else if (count >= size)
+    __chk_fail ();
+  else
+    {
+      buf[count] = '\0';
+      result = buf;
+    }
+  fp->_IO_file_flags |= old_error;
+  _IO_release_lock (fp);
+  return result;
+}