how to get the PID of an application after each time it changed

[camilla]

Hello everybody,

i cannot get the logic to do this:

- get the pid of a running app

-stor it in a variable $iPID

$iPID = WinGetProcess("[class:MozillaWindowClass]") this will do the first thing
 

but the problem i want to compare it with another pid of the same application after a wihle to see if the pid has been changed or not

- if it doesn't change exit

- if it changed than compare it to the first pid

any help

 

[jchd]

A new PID is assigned every time a new process is launched, irrespective of what application is launched.

Hence rerun $iPID = WinGetProcess("[class:MozillaWindowClass]") every time you suspect it could have changed.

What is the point of "comparing" in "if it changed than compare it to the first pid"?

[camilla]

 

A new PID is assigned every time a new process is launched, irrespective of what application is launched.

 

the point is in your answer to know if the app has been closed or not . forthat i want to get the first PID than compare it to another pid of the app

if they are equal exit if the are not then msg introducing the new pid

[Unc3nZureD]

Global $oPID = WinGetProcess("[class:MozillaWindowClass]")
While 1
    $nPID = WinGetProcess("[class:MozillaWindowClass]")
    If $nPID <> $oPid Then
        MsgBox(64, "Info", "The PID Has been Changed. I will quit.")
        Exit
    EndIf
WEnd

Maybe something like this?

[jchd]

So what's wrong with what I said, examplified by the post just made?

[camilla]

 

Unc3nZureD

thank you i will test it

but if i want to test the change of the pide 3 times

for example take the first pid as refernce $pid1

if it changed take the new pid as refernce $pid2

if the second pid $pid2 changed compare it to the third pid $pid3

i'm just learning and i'm new to autoit i get this idea and i want to realize it

[FireFox]

Hi,

A PID (Process Identifier) is unique, so you won't have the same.

Hence I don't see the purpose to compare the PIDs.

Br, FireFox.

[camilla]

 

FireFox.

Hence I don't see the purpose to compare the PIDs.

 

the point is in your answer to know if the app has been closed or not

[FireFox]

Well, just compare the new PID with the old one, like in the example posted.

Br, FireFox.

[Unc3nZureD]

Then just modfiy the example above. Use your logic. So. You're checking if it changed or not. If it changed then set the default comparing $oPID to the $nPID, since this time it'll be the next. But you have to cont it too! Then make a new variable for counting purposese. For example $count. After setting the $oPID to the new one, then increase the $count by one ( += 1 )

[camilla]

 

Unc3nZureD

thank you very much i will play with the logic

[jdelaney]

Use winlist, and convert the hwnd's returned in the array to a PID (_winapi function out there).

Loop through your, now, array of pids, and verify that YOUR PID is present or not.

Your route is only checking that the first instance of class:MozillaWindowClass is not present.

Edit: on launch of firefox, it spawns a new process (so the original Run PID is not present for long), so my suggestion would not work...but this works, generally:

#include <WinAPI.au3>
; example of waitin for the second instance to close
Run("C:\Program Files (x86)\Mozilla Firefox\firefox.exe")
$ipid = Run("C:\Program Files (x86)\Mozilla Firefox\firefox.exe")
Run("C:\Program Files (x86)\Mozilla Firefox\firefox.exe")
MsgBox(1,1,$ipid)
Sleep(5000)
MsgBox(1,1,ProcessExists($iPid))
While True
    $aWinList = WinList("[CLASS:MozillaWindowClass]")
    $bExists = False
    For $i = 1 To UBound($aWinList)-1
        Local $iTempPID=""
        _WinAPI_GetWindowThreadProcessId($aWinList[$i][1],$iTempPID)
        If $iTempPID=$ipid Then
            $bExists = True ; PID still exists
            ExitLoop
        EndIf
    Next
    If Not $bExists Then ExitLoop
WEnd

Another edit: all the PID's for ANY firefox launched will be the same...you will need to use handles to validate the window is no longer present.

Edited February 6, 2014 by jdelaney

[camilla]

 

jdelaney

thank you for you help,but i will tell you my idea

my idea is about the possibilities of exucuting an application after 3 times of pc reboot.

because the only thing that changed after each reboot is the apps PID i get the idea of taking the PID of  windows explorer "[CabinetWClass]" because it is the only process that alawys works and have a window handle

here we come to my script :

-first we take the first $Pid1 as reference to first reboot

-after 1 reboot we compare a second $Pid2 with the first one $Pid1 if they are different this means the computer has been rebooted here we take the

second $Pid2 as refernce after a second reboot we take a third $Pid3 and again compare it to the second one $Pid2

if they are different this means the computer has been rebooted now we give a message box telling how many times the computer has been rebooted

i cannot get the logic to do this  only

Edited February 6, 2014 by camilla

[Unc3nZureD]

What if you restart the explorer.exe because something freezed it?

[camilla]

 

Unc3nZureD

what do you mean?

[jdelaney]

Seems like it would be easier to have a startup job, that write the date time to a file.

If over 3 lines in the file, do something, delete the file.

[camilla]

 

jdelaney

thank you i did that,but  if we can make the script  writes each time it starts and save it inside itself then when we reach 3 times it pops a message

[Unc3nZureD]

The problem is that it will bea quite easy to bypass

If you write it into the starup, it takes 3 click to remove

If you use registry, it can be sniffed and midified to have unlimited restart.

[camilla]

i don't care about its remove rather than get it to work first

[kylomas]

camilla,

Do you want to limit the 3 starts test to a certain duration, eg; 3 starts within 5 hours?