diff --git a/lib/netutil.lua b/lib/netutil.lua
index 7d623fd..373c9c3 100644
--- a/lib/netutil.lua
+++ b/lib/netutil.lua
@@ -5,7 +5,7 @@ local ufs = require "unionfs"
 local rpc = require "rpc"
 local netutil = {}
 
-function netutil.importfs(host,rpath,lpath) -- import filesystem *rpath* from *host* and attach it to *lpath*
+function netutil.importfs(host,rpath,lpath) -- string string string -- boolean -- Import filesystem *rpath* from *host* and attach it to *lpath*.
  local px = rpc.proxy(host,rpath.."_")
  function px.getLabel()
   return host..":"..rpath
@@ -14,7 +14,7 @@ function netutil.importfs(host,rpath,lpath) -- import filesystem *rpath* from *h
  return fs.mount(lpath,px)
 end
 
-function netutil.exportfs(path) -- export the directory *path* over RPC
+function netutil.exportfs(path) -- string -- boolean -- Export the directory *path* over RPC.
  local path = "/"..table.concat(fs.segments(path),"/")
  local px = ufs.create(path)
  for k,v in pairs(px) do
@@ -24,7 +24,7 @@ function netutil.exportfs(path) -- export the directory *path* over RPC
  return true
 end
 
-function netutil.ping(addr,times,timeout, silent) -- Request acknowledgment from *addr*, waiting *timeout* seconds each try, and try *times* times. If *silent* is true, don't print status. Returns true if there was at least one successful ping, the number of successes, the number of failures, and the average round trip time.
+function netutil.ping(addr,times,timeout,silent) -- string number number boolean -- boolean number number number -- Request acknowledgment from *addr*, waiting *timeout* seconds each try, and try *times* times. If *silent* is true, don't print status. Returns true if there was at least one successful ping, the number of successes, the number of failures, and the average round trip time.
  local times, timeout = times or 5, timeout or 30
  local success, fail, time, avg = 0, 0, 0, 0
  for i = 1, times do
@@ -46,7 +46,7 @@ function netutil.ping(addr,times,timeout, silent) -- Request acknowledgment from
  return success > 0, success, fail, avg
 end
 
-function netutil.nc(host,port)
+function netutil.nc(host,port) -- string number -- boolean -- Starts an interactive Minitel socket connection to *host* on *port*, primarily for remote login. Returns whether the attempt was successful.
  port = port or 22
  local socket = minitel.open(host,port)
  if not socket then return false end
@@ -66,6 +66,7 @@ function netutil.nc(host,port)
    socket:write(b.."\n")
   end
  until socket.state ~= "open"
+ return true
 end
 
 return netutil