1 files changed, 55 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/bsd/tcflow.c b/REORG.TODO/sysdeps/unix/bsd/tcflow.c
new file mode 100644
index 0000000000..39a13f13ef
--- /dev/null
+++ b/REORG.TODO/sysdeps/unix/bsd/tcflow.c
@@ -0,0 +1,55 @@
+/* Copyright (C) 1991-2017 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <stddef.h>
+#include <termios.h>
+#include <unistd.h>
+
+#include "bsdtty.h"
+
+/* Suspend or restart transmission on FD.  */
+int
+tcflow (int fd, int action)
+{
+  switch (action)
+    {
+    case TCOOFF:
+      return __ioctl (fd, TIOCSTOP, (void *) NULL);
+    case TCOON:
+      return __ioctl (fd, TIOCSTART, (void *) NULL);
+
+    case TCIOFF:
+    case TCION:
+      {
+	/* This just writes the START or STOP character with
+	   `write'.  Is there another way to do this?  */
+	struct termios attr;
+	unsigned char c;
+	if (tcgetattr (fd, &attr) < 0)
+	  return -1;
+	c = attr.c_cc[action == TCIOFF ? VSTOP : VSTART];
+	if (c != _POSIX_VDISABLE && write (fd, &c, 1) < 1)
+	  return -1;
+	return 0;
+      }
+
+    default:
+      __set_errno (EINVAL);
+      return -1;
+    }
+}