Import

Src/Hyperion-kernel/lib/modules/Hyperion/12_devfs.kmod

@@ -0,0 +1,147 @@
+--:Minify:--
+local kernel = ...
+
+local proxy = {}
+local data = {}
+
+proxy.address = "devfs0000"
+proxy.isvirt = true
+proxy.isReadOnly = function() return false end
+proxy.spaceUsed = function() return 0 end
+proxy.spaceTotal = function() return 0 end
+proxy.makeDirectory = function() error("EACCES") end
+proxy.remove = function() error("EACCES") end
+proxy.setLabel = function() error("EACCES") end
+proxy.getLabel = function() return "devfs" end
+proxy.attributes = function(path) return {
+    size = 0,
+    modified = 0,
+    created = 0,
+} end
+
+function proxy:open(path, mode)
+    local steps = kernel.vfs.splitPath(path)
+    local step = data
+    for i=1, #steps-1 do
+        local dat = step[steps[i]]
+        if type(dat) ~= "table" then error("ENFILE") end
+        step=dat
+    end
+    if type(step[steps[#steps]]) == "function" then
+        return step[steps[#steps]]("open", mode)
+    end
+    error("ENFILE")
+end
+
+function proxy:type(path, mode)
+    local steps = kernel.vfs.splitPath(path)
+    local step = data
+    if #steps == 0 then
+        return "directory"
+    end
+    for i=1, #steps-1 do
+        local dat = step[steps[i]]
+        if type(dat) ~= "table" then error("ENFILE") end
+        step=dat
+    end
+    if type(step[steps[#steps]]) == "function" then
+        return step[steps[#steps]]("type", mode)
+    end
+    if type(step[steps[#steps]]) == "table" then
+        return "directory"
+    end
+    error("ENOENT")
+end
+
+function proxy:list(path)
+    local steps = kernel.vfs.splitPath(path)
+    local step = data
+    if #steps == 0 then
+        return table.keys(data)
+    end
+    for i=1, #steps-1 do
+        local dat = step[steps[i]]
+        if type(dat) ~= "table" then error("ENOENT") end
+        step=dat
+    end
+    if type(step[steps[#steps]]) == "table" then
+        return table.keys(step[steps[#steps]])
+    end
+    error("ENOENT")
+end
+
+function proxy:fileExists(path)
+    local ok = pcall(function()
+        return self:type(path)
+    end)
+    return ok
+end
+
+function data.random(op, mode)
+    if op=="type" then
+        return "character device"
+    elseif op=="open" then
+        if mode=="r" then
+            return {
+                read=function(amount)
+                    local str = ""
+                    for i=1, amount or 1 do
+                        str=str..string.char(math.random(0, 255))
+                    end
+                    return str
+                end
+            }
+        elseif mode=="w" or mode=="a" then
+            return {
+                write=function() end
+            }
+        else error("EACCES")
+        end
+    end
+end
+
+function data.null(op, mode)
+    if op=="type" then
+        return "character device"
+    elseif op=="open" then
+        if mode=="r" then
+            return {
+                read=function(amount) end
+            }
+        elseif mode=="w" or mode=="a" then
+            return {
+                write=function() end
+            }
+        else error("EACCES")
+        end
+    end
+end
+
+function data.zero(op, mode)
+    if op=="type" then
+        return "character device"
+    elseif op=="open" then
+        if mode=="r" then
+            return {
+                read=function(amount)
+                    local str = ""
+                    for i=1, amount or 1 do
+                        str=str..string.char(0)
+                    end
+                    return str
+                end
+            }
+        elseif mode=="w" or mode=="a" then
+            return {
+                write=function() end
+            }
+        else error("EACCES")
+        end
+    end
+end
+
+data["disk"]={}
+kernel.devfs={}
+kernel.devfs.data=data
+kernel.devfs.proxy=proxy
+kernel.disks["devfs0000"]=proxy