From 408e9600b7950c779f47a075c5a4f502ba8b395d Mon Sep 17 00:00:00 2001
From: XeonSquared <redtailedairways@gmail.com>
Date: Mon, 4 Nov 2019 08:54:30 +1100
Subject: [PATCH] made the kernel actually work again

---
 module/buffer.lua         | 171 ----------------------------------------------
 module/chatbox-dprint.lua |   7 ++
 module/init.lua           |   8 +--
 module/io.lua             | 116 -------------------------------
 module/loadfile.lua       |   3 +-
 module/newio.lua          |  34 +++++++++
 module/sched.lua          |   2 +-
 module/vt-task.lua        |   5 +-
 8 files changed, 52 insertions(+), 294 deletions(-)
 delete mode 100644 module/buffer.lua
 create mode 100644 module/chatbox-dprint.lua
 delete mode 100644 module/io.lua
 create mode 100644 module/newio.lua

diff --git a/module/buffer.lua b/module/buffer.lua
deleted file mode 100644
index 5b1e164..0000000
--- a/module/buffer.lua
+++ /dev/null
@@ -1,171 +0,0 @@
-buffer = {}
-local metatable = {
- __index = buffer,
- __metatable = "file",
- __close = buffer.close
-}
-
-function buffer.new(mode, stream)
- local result = {
-  closed = false,
-  tty = false,
-  mode = {},
-  stream = stream,
-  bufferRead = "",
-  bufferWrite = "",
-  bufferSize = math.max(512, math.min(8 * 1024, computer.freeMemory() / 8)),
-  bufferMode = "full",
-  readTimeout = math.huge,
- }
- mode = mode or "r"
- for i = 1, mode:len() do
-  result.mode[mode:sub(i, i)] = true
- end
- -- when stream closes, result should close first
- -- when result closes, stream should close after
- -- when stream closes, it is removed from the proc
- stream.close = setmetatable({close = stream.close,parent = result},{__call = buffer.close})
- return setmetatable(result, metatable)
-end
-
-function buffer:close()
- -- self is either the buffer, or the stream.close callable
- local meta = getmetatable(self)
- if meta == metatable.__metatable then
-  return self.stream:close()
- end
- local parent = self.parent
-
- if parent.mode.w or parent.mode.a then
-  parent:flush()
- end
- parent.closed = true
- return self.close(parent.stream)
-end
-
-function buffer:flush()
- if #self.bufferWrite > 0 then
-  local tmp = self.bufferWrite
-  self.bufferWrite = ""
-  local result, reason = self.stream:write(tmp)
-  if not result then
-   return nil, reason or "bad file descriptor"
-  end
- end
-
- return self
-end
-
-function buffer:lines(...)
- local args = table.pack(...)
- return function()
-  local result = table.pack(self:read(table.unpack(args, 1, args.n)))
-  if not result[1] and result[2] then
-   error(result[2])
-  end
-  return table.unpack(result, 1, result.n)
- end
-end
-
-local function readChunk(self)
- if computer.uptime() > self.timeout then
-  error("timeout")
- end
- local result, reason = self.stream:read(math.max(1,self.bufferSize))
- if result then
-  self.bufferRead = self.bufferRead .. result
-  return self
- else -- error or eof
-  return result, reason
- end
-end
-
-function buffer:readLine(chop, timeout)
- self.timeout = timeout or (computer.uptime() + self.readTimeout)
- local start = 1
- while true do
-  local buf = self.bufferRead
-  local i = buf:find("[\r\n]", start)
-  local c = i and buf:sub(i,i)
-  local is_cr = c == "\r"
-  if i and (not is_cr or i < #buf) then
-   local n = buf:sub(i+1,i+1)
-   if is_cr and n == "\n" then
-    c = c .. n
-   end
-   local result = buf:sub(1, i - 1) .. (chop and "" or c)
-   self.bufferRead = buf:sub(i + #c)
-   return result
-  else
-   start = #self.bufferRead - (is_cr and 1 or 0)
-   local result, reason = readChunk(self)
-   if not result then
-    if reason then
-     return result, reason
-    else -- eof
-     result = #self.bufferRead > 0 and self.bufferRead or nil
-     self.bufferRead = ""
-     return result
-    end
-   end
-  end
-  coroutine.yield()
- end
-end
-
-function buffer:read(...)
- if not self.mode.r then
-  return nil, "read mode was not enabled for this stream"
- end
-
- if self.mode.w or self.mode.a then
-  self:flush()
- end
-
- if select("#", ...) == 0 then
-  return self:readLine(true)
- end
- return self:formatted_read(readChunk, ...)
-end
-
-function buffer:setvbuf(mode, size)
- mode = mode or self.bufferMode
- size = size or self.bufferSize
-
- assert(mode == "no" or mode == "full" or mode == "line",
-  "bad argument #1 (no, full or line expected, got " .. tostring(mode) .. ")")
- assert(mode == "no" or type(size) == "number",
-  "bad argument #2 (number expected, got " .. type(size) .. ")")
-
- self.bufferMode = mode
- self.bufferSize = size
-
- return self.bufferMode, self.bufferSize
-end
-
-function buffer:write(...)
- if self.closed then
-  return nil, "bad file descriptor"
- end
- if not self.mode.w and not self.mode.a then
-  return nil, "write mode was not enabled for this stream"
- end
- local args = table.pack(...)
- for i = 1, args.n do
-  if type(args[i]) == "number" then
-   args[i] = tostring(args[i])
-  end
-  checkArg(i, args[i], "string")
- end
-
- for i = 1, args.n do
-  local arg = args[i]
-  local result, reason
-  result, reason = self.stream:write(arg)
-  if not result then
-   return nil, reason
-  end
- end
-
- return self
-end
diff --git a/module/chatbox-dprint.lua b/module/chatbox-dprint.lua
new file mode 100644
index 0000000..577a4fc
--- /dev/null
+++ b/module/chatbox-dprint.lua
@@ -0,0 +1,7 @@
+if component.list("chat_box")() then
+ function dprint(...)
+  for k,v in pairs({...}) do
+   component.invoke(component.list("chat_box")(),"say",v)
+  end
+ end
+end
diff --git a/module/init.lua b/module/init.lua
index 2855e96..0ea6a09 100644
--- a/module/init.lua
+++ b/module/init.lua
@@ -1,12 +1,12 @@
+--#include "module/chatbox-dprint.lua"
 --#include "module/syslog.lua"
 --#include "module/sched.lua"
---#include "module/buffer.lua"
 --#include "module/fs.lua"
---#include "module/io.lua"
+--#include "module/newio.lua"
 --#include "module/devfs.lua"
 --#include "module/devfs/syslog.lua"
+--#include "module/vt-task.lua"
 --#include "module/loadfile.lua"
---#include "module/term.lua"
-os.spawnfile("/boot/exec/init.lua","init")
+os.spawnfile("/boot/exec/init.lua")
 
 os.sched()
diff --git a/module/io.lua b/module/io.lua
deleted file mode 100644
index 59bf90a..0000000
--- a/module/io.lua
+++ /dev/null
@@ -1,116 +0,0 @@
-do
-io = {}
-
-function io.close(file)
- return (file or io.output()):close()
-end
-
-function io.flush()
- return io.output():flush()
-end
-
-function io.lines(filename, ...)
- if filename then
-  local file, reason = io.open(filename)
-  if not file then
-   error(reason, 2)
-  end
-  local args = table.pack(...)
-  return function()
-   local result = table.pack(file:read(table.unpack(args, 1, args.n)))
-   if not result[1] then
-    if result[2] then
-     error(result[2], 2)
-    else -- eof
-     file:close()
-     return nil
-    end
-   end
-   return table.unpack(result, 1, result.n)
-  end
- else
- return io.input():lines()
- end
-end
-
-function io.open(path, mode)
- local stream, result = fs.open(path, mode)
- if stream then
-  return buffer.new(mode, stream)
- else
-  return nil, result
- end
-end
-
-local fdt = {[0]="STDIN","STDOUT","STDERR"}
-local function getfh(fd)
- return os.getenv(fdt[fd] or "FILE"..tostring(fd))
-end
-local function setfh(fd,fh)
- os.setenv(fdt[fd] or "FILE"..tostring(fd),fh)
-end
-
-function io.stream(fd,file,mode)
- checkArg(1,fd,'number')
- assert(fd>=0,'fd must be >= 0. 0 is input, 1 is stdout, 2 is stderr')
- if file then
-  if type(file) == "string" then
-   local result, reason = io.open(file, mode)
-   if not result then
-    error(reason, 2)
-   end
-   file = result
-  elseif not io.type(file) then
-   error("bad argument #1 (string or file expected, got " .. type(file) .. ")", 2)
-  end
-  setfh(fd,file)
- end
- return getfh(fd)
-end
-
-function io.input(file)
- return io.stream(0, file, 'r')
-end
-
-function io.output(file)
- return io.stream(1, file,'w')
-end
-
-function io.error(file)
- return io.stream(2, file,'w')
-end
-
-function io.read(...)
- return io.input():read(...)
-end
-
-function io.tmpfile()
- local name = os.tmpname()
- if name then
-  return io.open(name, "a")
- end
-end
-
-function io.type(object)
- if type(object) == "table" then
-  if getmetatable(object) == "file" then
-   if object.stream.handle then
-    return "file"
-   else
-    return "closed file"
-   end
-  end
- end
- return nil
-end
-
-function io.write(...)
-  return io.output():write(...)
-end
-
-function print(...)
- for k,v in ipairs({...}) do
-  io.write(tostring(v).."\n")
- end
-end
-end
diff --git a/module/loadfile.lua b/module/loadfile.lua
index 6c29473..7e51efc 100644
--- a/module/loadfile.lua
+++ b/module/loadfile.lua
@@ -8,7 +8,8 @@ function runfile(p,...) -- runs file *p* with arbitrary arguments in the current
  return loadfile(p)(...)
 end
 function os.spawnfile(p,n) -- spawns a new process from file *p* with name *n*
- return os.spawn(function() xpcall(loadfile(p),function(e) dprint(e.."\n"..debug.traceback) end) end,n)
+ dprint(p,n)
+ return os.spawn(function() xpcall(loadfile(p),function(e) dprint(e.."\n"..debug.traceback()) end) end,n or p)
 end
 function require(f) -- searches for a library with name *f* and returns what the library returns, if possible
  local lib = os.getenv("LIB") or "/boot/lib"
diff --git a/module/newio.lua b/module/newio.lua
new file mode 100644
index 0000000..6c04164
--- /dev/null
+++ b/module/newio.lua
@@ -0,0 +1,34 @@
+io = {}
+function io.input(fd)
+ if type(fd) == "string" then
+  fd=fs.open(fd,"rb")
+ end
+ if fd then
+  os.setenv("STDIN",fd)
+ end
+ return os.getenv("STDIN")
+end
+function io.output(fd)
+ if type(fd) == "string" then
+  fd=fs.open(fd,"wb")
+ end
+ if fd then
+  os.setenv("STDOUT",fd)
+ end
+ return os.getenv("STDOUT")
+end
+
+io.open = fs.open
+
+function io.read(...)
+ return io.input():read()
+end
+function io.write(...)
+ io.output():write(...)
+end
+
+function print(...)
+ for k,v in ipairs({...}) do
+  io.write(tostring(v).."\n")
+ end
+end
diff --git a/module/sched.lua b/module/sched.lua
index 76611f9..7434a3c 100644
--- a/module/sched.lua
+++ b/module/sched.lua
@@ -1,5 +1,5 @@
 do
-local tTasks,nPid,nTimeout,cPid = {},1,0,0 -- table of tasks, next process ID, event timeout, current PID
+local tTasks,nPid,nTimeout,cPid = {},1,1,0 -- table of tasks, next process ID, event timeout, current PID
 function os.spawn(f,n) -- creates a process from function *f* with name *n*
  tTasks[nPid] = {
   c=coroutine.create(f), -- actual coroutine
diff --git a/module/vt-task.lua b/module/vt-task.lua
index f0032d5..83d0a58 100644
--- a/module/vt-task.lua
+++ b/module/vt-task.lua
@@ -27,9 +27,12 @@ function vtemu(gpua,scra)
   end
  end)) end,string.format("ttyd[%s:%s]",gpua:sub(1,8),scra:sub(1,8)))
  local function bread()
+  while not buf:find("\n") do
+   coroutine.yield()
+  end
   local n = buf:find("\n")
-  if not n then return nil end
   r, buf = buf:sub(1,n), buf:sub(n+1)
+  dprint("bread",r)
   return r
  end
  return bread, write, function() io.write("\27[2J\27[H") end