made spawnfile queue an event on a process ending, changed the shell to use it

exec/shell.lua

@@ -1,4 +1,5 @@
 local serial = require "serialization"
+local event = require "event"
 print(pcall(function()
 local shenv = {}
 function shenv.quit()
@@ -21,21 +22,14 @@ setmetatable(shenv,{__index=function(_,k)
  if _G[k] then
   return _G[k]
  elseif fp then
-  local rqid = string.format("shell-%d",math.random(1,99999))
   return function(...)
    local tA = {...}
-   local pid = os.spawn(function() computer.pushSignal(rqid,pcall(loadfile(fp),table.unpack(tA))) end,fp)
-   local tE = {}
-   repeat
-    tE = {coroutine.yield()}
-    if tE[1] == rqid then
-     table.remove(tE,1)
-     if tE[1] == true then
-      table.remove(tE,1)
-     end
-     return table.unpack(tE)
-    end
-   until not os.taskInfo(pid)
+   local pid = os.spawnfile(fp,fp,table.unpack(tA))
+   local tE = event.pull("process_finished",pid)
+   if tE[1] == true then
+    table.remove(tE,1)
+   end
+   return table.unpack(tE)
   end
  end
 end})
@@ -51,7 +45,7 @@ while os.getenv("run") do
  if tResult[1] == true then table.remove(tResult,1) end
  for k,v in pairs(tResult) do
   if type(v) == "table" then
-   print(serial.serialize(v))
+   print(serial.serialize(v,true))
   else
    print(v)
   end

module/loadfile.lua

@@ -7,8 +7,9 @@ end
 function runfile(p,...) -- runs file *p* with arbitrary arguments in the current thread
  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 or p)
+function os.spawnfile(p,n,...) -- spawns a new process from file *p* with name *n*, with arguments following *n*.
+ local tA = {...}
+ return os.spawn(function() computer.pushSignal("process_finished", os.pid(), pcall(loadfile(p), table.unpack(tA))) 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"