Index: Doc/library/fcntl.rst
===================================================================
--- Doc/library/fcntl.rst	(revision 80438)
+++ Doc/library/fcntl.rst	(working copy)
@@ -48,7 +48,9 @@
 
    This function is identical to the :func:`fcntl` function, except that the
    operations are typically defined in the library module :mod:`termios` and the
-   argument handling is even more complicated.
+   argument handling is even more complicated. Consult Linux
+   `tty_ioctl man pages <http://www.kernel.org/doc/man-pages/online/pages/man4/tty_ioctl.4.html>`_
+   for details.
 
    The op parameter is limited to values that can fit in 32-bits.
 
Index: Doc/library/termios.rst
===================================================================
--- Doc/library/termios.rst	(revision 80438)
+++ Doc/library/termios.rst	(working copy)
@@ -12,7 +12,9 @@
    pair: tty; I/O control
 
 This module provides an interface to the POSIX calls for tty I/O control.  For a
-complete description of these calls, see the POSIX or Unix manual pages.  It is
+complete description of these calls, see 
+`the POSIX specification <http://www.opengroup.org/onlinepubs/9699919799/basedefs/termios.h.html>`_
+or Unix manual pages.  It is
 only available for those Unix versions that support POSIX *termios* style tty
 I/O control (and then only if configured at installation time).