one more try

lib/ed.lua

@@ -112,6 +112,7 @@ function ed.newBuffer()
 end 
 
 function ed.open(buffer)
+ local bpath = buffer
  if ed.buffers[buffer] then
   buffer = ed.buffers[buffer]
  end
@@ -120,7 +121,9 @@ function ed.open(buffer)
   nb:load(buffer)
   buffer = nb
  end
- if type(buffer) ~= "table" then buffer = ed.newBuffer() buffer[1] = "" end
+ if type(buffer) ~= "table" then buffer = ed.newBuffer() end
+ buffer[1] = buffer[1] or "" 
+ buffer.path = buffer.path or "/"..((bpath:sub(1,1) == "/" and table.concat(fs.segments(path),"/")) or table.concat(fs.segments(os.getenv("PWD").."/"..bpath),"/"))
  return buffer
 end
 

module/buffer.lua

@@ -303,11 +303,21 @@ function buffer:read(...)
       end
       hIndex = math.max(math.min(hIndex,#self.history),0)
      end
-    elseif char == "\8" then
+    elseif char == "\8" then -- backspace
      if #buffer > 0 and pos <= #buffer then
       buffer = buffer:sub(1, (#buffer - pos)) .. buffer:sub((#buffer - pos) + 2)
      end
-    elseif char == "\13" or char == "\10" or char == "\n" then
+    elseif char == "\1" then -- ^A, go to start of line
+     pos = buffer:len()+1
+    elseif char == "\5" then -- ^E, go to end of line
+     pos = 1
+    elseif char == "\2" then -- ^B, back one word
+     local nc = buffer:reverse():find(" ",pos+1)
+     pos = nc or #buffer+1
+    elseif char == "\6" then -- ^F, forward one word
+     local nc = buffer:find(" ",math.max(#buffer-pos+3,0))
+     pos = (nc and #buffer-nc+2) or 1
+    elseif char == "\13" or char == "\10" or char == "\n" then -- return / newline
      io.write("\n")
      self.history[#self.history+1] = buffer
      if #self.history > (self.maxhistory or 16) then table.remove(self.history,1) end