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Automatically execute lua-script on startup

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user669
How do I cheat?

Reputation: 0

Joined: 03 Jul 2016
Posts: 3

Posted: Sun Jul 03, 2016 6:37 pm Post subject: Automatically execute lua-script on startup

Hi

I've tried to get a simple lua script (open a process, write these bytes, read those bytes, execute command line afterwards...) to automatically execute on Cheat Engine start up with no luck.

For example this simple script, which works totally fine if executed with Tools->Lua Engine is doing absolutely nothing if added to main.lua

Code:

...
openProcess("citra.exe")
writeBytes(lOffset1, iValue1)
iValue2 = readBytes(lOffset1, 2)
...

I guess main.lua is beeing called before CE has initialised completely, so I thought how about a timer which will call a function after 5 seconds (should be enough time for CE to get initialised).

Code:

t = createTimer(nil,false)
timer_onTimer(t, MyFunc)
timer_setInterval(t, 5000)
timer_setEnabled(t, true)

function MyFunc()
...
openProcess("citra.exe")
writeBytes(lOffset1, iValue1)
iValue2 = readBytes(lOffset1, 2)
...

which however also does nothing. Is there any way to get some kind of automation like this done or even better, call CE directly from commandline and pass a lua.script as argument which will be executed after (not on) startup?

Trainers are not an option as I tend to manually search/patch something new almost every time. I just want to use vanilla CE with a few commands after the start.

STN
I post too much

Reputation: 43

Joined: 09 Nov 2005
Posts: 2676

Posted: Sun Jul 03, 2016 7:25 pm Post subject:

Add it to autorun folder _________________ Cheat Requests/Tables- Fearless Cheat Engine https://fearlessrevolution.com

Zanzer
I post too much

Reputation: 126

Joined: 09 Jun 2013
Posts: 3278

Posted: Sun Jul 03, 2016 7:41 pm Post subject:

Code:

getAutoAttachList().add("game.exe")
function onOpenProcess(processId)
reinitializeSymbolhandler()
-- enable whatever
end

user669
How do I cheat?

Reputation: 0

Joined: 03 Jul 2016
Posts: 3

Posted: Mon Jul 04, 2016 5:35 am Post subject:

STN wrote:

Add it to autorun folder

...
thats not what I want. CE gets called automatically, however it doesn't load the lua script.

Zanzer wrote:

Code:

getAutoAttachList().add("game.exe")
function onOpenProcess(processId)
reinitializeSymbolhandler()
-- enable whatever
end

Wow this actually works, even with openProcess(pid). getAutoAttachList().add() is missing in the documentation...

Just a problem, onOpenProcess gets called multiple (3-4) times.

Code:

getAutoAttachList().add("citra.exe")
function onOpenProcess()
reinitializeSymbolhandler()
showMessage("onProcess called")
end

Is there a way to fix this or do I have to rely on toggle-booleans?

ParkourPenguin
I post too much

Reputation: 152

Joined: 06 Jul 2014
Posts: 4722

Posted: Mon Jul 04, 2016 8:54 am Post subject:

user669 wrote:

getAutoAttachList().add() is missing in the documentation...

main.lua wrote:

getAutoAttachList(): returns the AutoAttach StringList object.
...
Stringlist Class: (Inheritance : Strings->Object)
...
Strings Class: (Inheritance : Object) (Mostly an abstract class)
properties
Text : String - All the strings in one string
Count: Integer - The number of strings in this list
String[]: String - Array to access one specific string in the list
[] = String[]

methods
clear() : Deletes all strings in the list
add(string) : adds a string to the list
delete(index) : Deletes a string from the list
...

user669 wrote:

Just a problem, onOpenProcess gets called multiple (3-4) times... Is there a way to fix this or do I have to rely on toggle-booleans?

main.lua wrote:

function onOpenProcess(processid):
If this function is defined it will be called whenever cheat engine opens a process.
Note: The the same process might be opened multiple times in a row internally
Note 2: This function is called before attachment is fully done. You can call reinitializeSymbolhandler() to force the open to complete, but it will slow down process opens. Alternatively, you could launch a timer which will run when the opening has finished

_________________

I don't know where I'm going, but I'll figure it out when I get there.

user669
How do I cheat?

Reputation: 0

Joined: 03 Jul 2016
Posts: 3

Posted: Mon Jul 04, 2016 10:16 am Post subject:

ParkourPenguin wrote:

...

Yes I figured it out already, turns out wiki.cheatengine.org/index.php?title=Lua is missing a ton of stuff. May someone updates it.
reinitializeSymbolhandler() does not solve anything though, onOpenProcess(processId) will nontheless get called 3-4 times. However processId will be 0 on every call except the last one. So my approach is a little different:

Code:

--main.lua:
if getProcessIDFromProcessName("citra.exe") == nil then
--quit if process not found
return
end
getAutoAttachList().add("citra.exe")

function onOpenProcess(processId)
if processId ~= getProcessIDFromProcessName("citra.exe") then
--onOpenProcess() gets called multiple times, but only the very last call should have a valid processId
return
end
--Do all stuff here
end

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