How can I execute WMI method asynchronously?

Hi,

I have sample script below which I use to archive files on remote server, I
need to wait till my remote process exits and then copy archived files over,
problem is that method call to ZipFile returns immediately instead of waiting
for process to actually terminate, is there an easy way to wait for it to
terminate before proceeding further?

$ComputerName = "SERVER01"
ZipFile $ComputerName
Write-Host "All Done"


function ZipFile ([string]$ComputerName)
{
$objWMI = New-Object System.Management.ManagementClass
"\\$ComputerName\root\cimv2:Win32_Process"
$FullPath = "c:\winnt\system32\7za.exe a -y -tgzip
d:\Logs\FTPLogs\MSFTPSVC1\a.gzip d:\Logs\FTPLogs\MSFTPSVC1\ex071127.log"
$cmdargs = $FullPath, $null, $null, 0
$objWmi.Create($FullPath) | Out-Null
}

ChanKaiShi wrote: How about in your ZipFile function, just before it ends, that you create
a loop checking whether the 7za.exe process is still running? Once
gone, then exiting the function...

Marco

--
Microsoft MVP - Windows PowerShell
http://www.microsoft.com/mvp

PowerGadgets MVP
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Blog:
http://marcoshaw.blogspot.com

I can not figure out how to do what you are offering since I have no idea how
to find ProcessID of remotely executing process, it returns 0 for me.

"Marco Shaw [MVP]" wrote:

ChanKaiShi wrote: I tried this:
$objWMI = New-Object System.Management.ManagementClass
"\\.\root\cimv2:Win32_Process"
$FullPath = "c:\windows\system32\notepad.exe c:\test.txt "
$cmdargs = $FullPath, $null, $null, 0
$objWmi.Create($FullPath) | Out-Null
get-wmiobject -computer . win32_process| `
foreach-object{
if($_.commandline -eq $fullpath){"notepad found"}
}

Just drop something like this into your function:

while ($true) {
$wmi=get-wmiobject -computer . win32_process| `
where-object{ `
$_.commandline -eq $fullpath
}
if($wmi -eq $null){break}
start-sleep -seconds 5
}

Thanks,

But this code will not be specific to my instance of process but any process
with similar command line. It's possible that their will be some stale
processes out there with similar command line option. I really need to find
ProcessID for newly created process for endless loop but code below does not
produce it.
Does code below returs processID for you? It returns 0 for me always and
this the only way I beleive to make endless loop work since this is the only
unique thing about process.


$objWMI = [WmiClass]"\\$ComputerName\root\cimv2:Win32_Process"
$FullPath = "notepad.exe"
$cmdargs = $FullPath, $null, $null, 0
$ProcessID = $objWmi.PsBase.InvokeMethod("Create", $cmdArgs)


"Marco Shaw [MVP]" wrote:

"ChanKaiShi" <ChanKaiShi@xxxxxx> wrote in message
news:B9C6CAB0-B54F-47C4-8247-12E4491E60BE@xxxxxx

The object returned by the 'Create' method should contain the process id
eg

$Computer = "."
$c = [WMICLASS]"\\$computer\root\cimv2:WIn32_Process"
$proc = $c.Create("notepad.exe")
$proc.ProcessId


--
Jon

Thanks,

My sample code was too complex, I used your example and it does return
processID, but original question I guess is still unanswered since I can not
use blocking call for "Create" method.

"Jon" wrote:

"ChanKaiShi" <ChanKaiShi@xxxxxx> wrote in message
news:3601248B-3079-4227-A1A1-26ACED112329@xxxxxx


You could try using the 'GetProcessById' method to return a process
object,and then use 'WaitForExit' on it. eg something like

$Computer = "."
$c = [WMICLASS]"\\$computer\root\cimv2:WIn32_Process"
$proc = $c.Create("notepad.exe")
$ProcessId =$proc.ProcessId
$p = [diagnostics.process]::GetProcessById($ProcessId,$Computer)
$p.WaitForExit()



Process.GetProcessById Method (Int32, String)
http://msdn2.microsoft.com/en-us/lib...ec(VS.80).aspx


Process..::.WaitForExit Method
http://msdn2.microsoft.com/en-us/lib...itforexit.aspx



--
Jon

WaitForProcess() is not supported for remote machines.

"Jon" wrote:

"ChanKaiShi" <ChanKaiShi@xxxxxx> wrote in message
news:B9CDA456-C8B3-4606-B3D1-E08DC50B4351@xxxxxx
Had a feeling that that may be the case, but I thought I'd throw it out
there anyway.

You may be able to do something with some of the other members of the
process object eg 'HasExited'


#--------------------------------------------------------------------
$Computer = "."
$c = [WMICLASS]"\\$computer\root\cimv2:WIn32_Process"
$proc = $c.Create("notepad.exe")
$ProcessId =$proc.ProcessId
$p = [diagnostics.process]::GetProcessById($ProcessId,$Computer)

foreach ($i in 1..100) {

If ($p.HasExited) {break}
start-sleep -seconds 1

}

#--------------------------------------------------------------------

Can't test it here at the moment, but that is what I would try.

Pipe $p to Get-Member for more options

$p | gm

--
Jon