Wait for a process to end I didn't start?

Archive: Wait for a process to end I didn't start?

MichaelFlya
7th October 2005 09:36 UTC

Wait for a process to end I didn't start?
Simple and short. How do I get the installer
to wait on a process to end I didn't start?

I need something like "ExecWait" for a process, yet the
process isn't executed by my installer. I need to pause
the installer without a messagebox until the process I
choose isn't running any longer. I keep coming across
a dead link within a recurring solution in threads posted
by Kichik. Here is a link to one of those threads below.

Thread:
http://forums.winamp.com/showthread....+installshield

Dead link:
http://unattended.sourceforge.net/installers.html

-MichaelFlya-

Takhir
7th October 2005 10:26 UTC

For apps with window:


!macro TerminateApp

    StrLen $5 "${PROG_NAME}"
    IntOp $5 $5 + 1 ; terminating 0 for caption to compare

restart:
    StrCpy $0 "0"

loop:
;    FindWindow $0 '' '' 0 $0
    FindWindow $0 'WindowsForms10.Window.8.app1' '' 0 $0
    IntCmp $0 0 done
    System::Call 'user32.dll::GetWindowText(i r0, t .r4, i r5) i .r2'
    StrCmp $4 "${PROG_NAME}" 0 loop
    System::Call 'user32.dll::GetWindowThreadProcessId(i r0, *i .r1)'
    System::Call 'kernel32.dll::OpenProcess(i 0x00100000, i 0, i r1) i .r2'
    SendMessage $0 0x0010 0 0 /TIMEOUT=2000
    System::Call 'kernel32.dll::WaitForSingleObject(i r2, i 3000) i .r3'
    IntCmp $3 0 done
    MessageBox MB_OKCANCEL|MB_ICONEXCLAMATION "Installer cannot terminate \
      running ${APP_NAME}.$\nClose Application and re-run Installer." IDOK restart
    Quit
  done:

!macroend

MichaelFlya
7th October 2005 10:58 UTC

Ok I start up the process "notepad.exe" after
which I start up my installer and hit install.

Now if the code works correctly the installation
should pause with the loading bar not moving till
I close notepad. How do I insert this in the script
correctly and properly?

-MichaelFlya-

KenA
7th October 2005 11:05 UTC

Re: Wait for a process to end I didn't start?

Originally posted by MichaelFlya
Simple and short. How do I get the installer
to wait on a process to end I didn't start?

I need something like "ExecWait" for a process, yet the
process isn't executed by my installer. I need to pause
the installer without a messagebox until the process I
choose isn't running any longer. I keep coming across
a dead link within a recurring solution in threads posted
by Kichik. Here is a link to one of those threads below.

Thread:
http://forums.winamp.com/showthread....+installshield

Dead link:
http://unattended.sourceforge.net/installers.html

-MichaelFlya-

Hi Michael,

for processes that don't include a window, you should use the FindProcDLL plug-ins - I never remember if all those plug-in I use are in the standard NSIS install, sorry - in a loop and exit the loop if the process is not found.

I'd also advise you to use a sleep instruction in your loop, or else you might peg the processor if your loop is tight. :)

KenA

Takhir
7th October 2005 11:24 UTC

Notepad window class name is 'Notepad' (for FindWindow).
For this specific window class you can skip 4 lines of window caption check out (2 lines at the beginning and GetWindowText+StrCmp in the loop). And " - Notepad" text is lang dependant and appears at the end of caption (like IE does). Please note 2000 and 3000 msec timeouts in the code. Usage:

!insertmacro TerminateApp

MichaelFlya
7th October 2005 11:30 UTC

Well, KenA has a good solution it seems.
Using the plugin found at this link:
http://nsis.sourceforge.net/wiki/Find_Process_By_Name

Plus using the code below. Which did the trick.


Section "Test"
Loop:
    FindProcDLL::FindProc "notepad.exe"
StrCmp $R0 0 0 +2
;MessageBox MB_OK "The number is $R0 meaning it is not found."
Goto Done
StrCmp $R0 1 0 +2
;MessageBox MB_OK "The number is $R0 meaning it is found."
Goto Loop
Done:
SectionEnd

Thanks !!

-MichaelFlya-