Update contrib/tools/bison to 3.1

3649391e5dae6eedaa45d736e3febbde1342c10a

1 files changed, 34 insertions, 0 deletions

diff --git a/contrib/tools/bison/lib/binary-io.c b/contrib/tools/bison/lib/binary-io.c
index 8bbdb44d121..f9cc4dd2ec6 100644
--- a/contrib/tools/bison/lib/binary-io.c
+++ b/contrib/tools/bison/lib/binary-io.c
@@ -1,3 +1,37 @@
+/* Binary mode I/O.
+   Copyright 2017-2018 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
 #include <config.h>
+
 #define BINARY_IO_INLINE _GL_EXTERN_INLINE
 #include "binary-io.h"
+
+#if defined __DJGPP__ || defined __EMX__
+# include <errno.h>
+# include <unistd.h>
+
+int
+__gl_setmode_check (int fd)
+{
+  if (isatty (fd))
+    {
+      errno = EINVAL;
+      return -1;
+    }
+  else
+    return 0;
+}
+#endif