ramfs bugfixes

sys/modules/opus/fs/ramfs.lua

@@ -53,8 +53,10 @@ function ramfs.makeDir(_, dir)
 	fs.mount(dir, 'ramfs', 'directory')
 end
 
-function ramfs.isDir(node)
-	return not not node.nodes
+function ramfs.isDir(node, dir)
+	if node.mountPoint == dir then
+		return not not node.nodes
+	end
 end
 
 function ramfs.getDrive()
@@ -77,7 +79,6 @@ function ramfs.list(node, dir)
 end
 
 function ramfs.open(node, fn, fl)
-
 	if fl ~= 'r' and fl ~= 'w' and fl ~= 'rb' and fl ~= 'wb' then
 		error('Unsupported mode')
 	end
@@ -87,22 +88,31 @@ function ramfs.open(node, fn, fl)
 			return
 		end
 
+		local c = type(node.contents) == 'table'
+			and string.char(table.unpack(node.contents))
+			or node.contents
+
 		local ctr = 0
 		local lines
 		return {
-            read = function()
-                ctr = ctr + 1
-                return node.contents:sub(ctr, ctr)
+			read = function(n)
+				n = n or 1
+				if ctr >= node.size then
+					return
+				end
+				local t = c:sub(ctr + 1, ctr + n)
+				ctr = ctr + n
+				return t
 			end,
 			readLine = function()
 				if not lines then
-					lines = Util.split(node.contents)
+					lines = Util.split(c)
 				end
 				ctr = ctr + 1
 				return lines[ctr]
 			end,
 			readAll = function()
-				return node.contents
+				return c
 			end,
 			close = function()
 				lines = nil
@@ -134,11 +144,27 @@ function ramfs.open(node, fn, fl)
 			return
 		end
 
+		local c = node.contents
+		if type(node.contents) == 'string' then
+			c = { }
+			for i = 1, node.size do
+				c[i] = node.contents:sub(i, i):byte()
+			end
+		end
+
 		local ctr = 0
 		return {
-			read = function()
+			read = function(n)
+				if n and n > 1 and ctr < node.size then
+					-- some programs open in rb, when it should have
+					-- been opened in r - attempt to support multiple read
+					-- if nils are present in data, this will fail
+					local t = string.char(table.unpack(c, ctr + 1, ctr + n))
+					ctr = ctr + n
+					return t
+				end
 				ctr = ctr + 1
-				return node.contents[ctr]
+				return c[ctr]
 			end,
 			close = function()
 			end,
@@ -150,7 +176,13 @@ function ramfs.open(node, fn, fl)
 		local c = { }
 		return {
 			write = function(b)
-				table.insert(c, b)
+				if type(b) == 'number' then
+					table.insert(c, b)
+				else
+					for i = 1, #b do
+						table.insert(c, b:sub(i, i):byte())
+					end
+				end
 			end,
 			flush = function()
 				node.contents = c