View source for ExecWait and waiting for child processes with Job Objects

{{PageAuthor|Anders}}

This macro will wait for a process and all of its children using the system plugin (Windows 2000 (NT5) and later)

The code has only very basic error checking (does not check for memalloc success) It does not preserve the registers and should probably be converted to a function at some point.

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!macro ExecWaitJob _exec
/*
0=ErrChk+JOBOBJECTASSOCIATE*+PROCESS_INFO 
1=hPort
2=hJob
3=ErrChk+hProcess+ioX
4=STARTINFO+hThread+ioOLAP
9="Stage"
*/
StrCpy $9 0
System::Call 'kernel32::CreateIoCompletionPort(i -1,i0,i0,i0)i.r1'
${IfThen} $1 != 0 ${|} IntOp $9 $9 + 1 ${|}
System::Call 'kernel32::CreateJobObject(i0,i0)i.r2'
${IfThen} $2 != 0 ${|} IntOp $9 $9 + 1 ${|}
System::Call '*(i 0,i $1)i.r0'
System::Call 'kernel32::SetInformationJobObject(i $2,i 7,i $0,i 8)i.r3'
${IfThen} $3 != 0 ${|} IntOp $9 $9 + 1 ${|}
System::Free $0
System::Call '*(i,i,i,i)i.r0'
System::Alloc 72
pop $4
System::Call "*$4(i 72)"
System::Call 'kernel32::CreateProcess(i0,t ${_exec},i0,i0,i0,i 0x01000004,i0,i0,i $4,i $0)i.r3'
${IfThen} $3 != 0 ${|} IntOp $9 $9 + 1 ${|}
System::Free $4
System::Call "*$0(i.r3,i.r4,i,i)"
System::Free $0
System::Call 'kernel32::AssignProcessToJobObject(i $2,i $3)i.r0'
${IfThen} $0 != 0 ${|} IntOp $9 $9 + 1 ${|}
System::Call 'kernel32::ResumeThread(i $4)i.r0'
${IfThen} $0 != -1 ${|} IntOp $9 $9 + 1 ${|}
System::Call 'kernel32::CloseHandle(i $3)'
System::Call 'kernel32::CloseHandle(i $4)'
!define __ExecWaitJob__ ExecWaitJob${__LINE__}
${__ExecWaitJob__}ioportwait:
System::Call 'kernel32::GetQueuedCompletionStatus(i $1,*i.r3,*i,*i.r4,i -1)i.r0'
${IfThen} $0 = 0 ${|} StrCpy $9 0 ${|}
${IfThen} $3 != 4 ${|} goto ${__ExecWaitJob__}ioportwait ${|}
System::Call 'kernel32::CloseHandle(i $2)'
System::Call 'kernel32::CloseHandle(i $1)'
!undef __ExecWaitJob__
${IfThen} $9 < 6 ${|} MessageBox mb_iconstop `ExecWaitJob "${_exec}" failed!` ${|}
!macroend

Section

StrCpy $8 'cmd /k echo Hello&start "" "%windir%\system32\cmd" /k echo ,World'
!insertmacro ExecWaitJob r8

;If the command is simple without doublequotes or commas you can do: 
!insertmacro ExecWaitJob '"cmd /k calc"'

SectionEnd
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[[Category:System Plugin Examples]]