Add doc for access() and ttyname(). Patch by Sean Reifschneider.
diff --git a/Doc/lib/libposix.tex b/Doc/lib/libposix.tex
index 27f8197..43d63e5 100644
--- a/Doc/lib/libposix.tex
+++ b/Doc/lib/libposix.tex
@@ -80,6 +80,12 @@
It defines the following functions and constants:
+\begin{funcdesc}{access}{path, mode}
+Check read/write/execute permissions for this process or extance of file
+\var{path}. Return \code{1} if access is granted, \code{0} if not.
+See the \UNIX{} manual for the semantics.
+\end{funcdesc}
+
\begin{funcdesc}{chdir}{path}
Change the current working directory to \var{path}.
\end{funcdesc}
@@ -321,6 +327,12 @@
Return the error message corresponding to the error code in \var{code}.
\end{funcdesc}
+\begin{funcdesc}{ttyname}{fd}
+Return a string which specifies the terminal device associated with
+file-descriptor \var{fd}. If \var{fd} is not associated with a terminal
+device, an exception is raised.
+\end{funcdesc}
+
\begin{funcdesc}{read}{fd, n}
Read at most \var{n} bytes from file descriptor \var{fd}.
Return a string containing the bytes read.