Update 'README.md'

README.md

@@ -3,15 +3,33 @@ goutmp - Minimal bindings to C stdlib pututmpx(), getutmpx() (/var/log/wtmp) and
 Any Go program which allows user shell access should update the standard UNIX files which track user sessions: /var/log/wtmp (for the 'w' and 'who' commands), and /var/log/lastlog (the 'last' and 'lastlog' commands).
 
 ```
-go doc
+$ go doc -all
 package goutmp // import "blitter.com/go/goutmp"
 
 Golang bindings for basic login/utmp accounting
 
-type UtmpEntry struct{ ... }
+FUNCTIONS
+
+func GetHost(addr string) (h string)
+    return remote client hostname or IP if host lookup fails addr is expected to
+    be of the format given by net.Addr.String() eg., "127.0.0.1:80" or
+    "[::1]:80"
 
 func Put_lastlog_entry(app, usr, ptsname, host string)
+    Put the login app, username and originating host/IP to lastlog
+
 func Unput_utmp(entry UtmpEntry)
-func Put_utmp(user, ptsname, host string) UtmpEntry
+    Remove a username/host entry from utmp
+
+
+TYPES
+
+type UtmpEntry struct {
+	// Has unexported fields.
+}
+    UtmpEntry wraps the C struct utmp
+
+func Put_utmp(user, ptsName, host string) UtmpEntry
+    Put a username and the originating host/IP to utmp
 ```