1 files changed, 47 insertions, 0 deletions
diff --git a/libc/sysdeps/unix/sysv/tcflow.c b/libc/sysdeps/unix/sysv/tcflow.c
new file mode 100644
index 000000000..dc67d0664
--- /dev/null
+++ b/libc/sysdeps/unix/sysv/tcflow.c
@@ -0,0 +1,47 @@
+/* Copyright (C) 1992, 1996, 1997, 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 <errno.h>
+#include <stddef.h>
+#include <termios.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+
+#include <sysv_termio.h>
+
+/* Suspend or restart transmission on FD.  */
+int
+tcflow (fd, action)
+     int fd;
+     int action;
+{
+  switch (action)
+    {
+    case TCOOFF:
+      return __ioctl (fd, _TCXONC, 0);
+    case TCOON:
+      return __ioctl (fd, _TCXONC, 1);
+    case TCIOFF:
+      return __ioctl (fd, _TCXONC, 2);
+    case TCION:
+      return __ioctl (fd, _TCXONC, 3);
+    default:
+      __set_errno (EINVAL);
+      return -1;
+    }
+}