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Grid Redstone.png  Function commands.execAsync
Available only to Command Computers, orders the specified MineCraft command to be executed, but doesn't yield. A "task_complete" event will be queued once the command has actually been executed. You can use the taskID returned by this function to identify the "task_complete" event, should you wish to pull it. Compare commands.exec, which automatically yields until this event is thrown, then catches it and returns the results.

This function allows huge amounts of commands to be requested in a very short time - much faster than Minecraft can actually perform them. Generating an excessive queue will cause your script to error out; to avoid problems, either perform periodic sleeps or measure incoming task_complete events (up to 256 events may exist within the event queue at a time; see os.pullEvent() for more info on the event system).
Syntax commands.execAsync(string command)
Returns number taskID
Part of ComputerCraft
API commands


Grid paper.png  Example
Says 'Hello' to the player, closest to the Command Computer.
commands.execAsync( "say @p Hello" )

Grid paper.png  Example
Checks if there are any players around the Command Computer in 2 block radius.
local radius = 2
local taskID = commands.execAsync( "testfor @a[r=" .. radius .. "]")

local arePlayersAround
  local event, id, success, executed, error = os.pullEvent( "task_complete" )
  arePlayersAround = success and executed
until id == taskID

if arePlayersAround then
  print( "There is one or more players around me." )
  print( "There are no players around me." )

Grid disk.png Commands API Functions
commands.exec - commands.execAsync - commands.list - commands.getBlockPosition - commands.getBlockInfo - commands.getBlockInfos