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Merged
merged 3 commits into from
Nov 7, 2018
Merged

Uninstall-LTService updates #36

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56d97e9
Merge pull request #41 from LabtechConsulting/master
DarrenWhite99 Sep 26, 2018
05a4436
Uninstall-LTService Update to handle agent_uninstall.exe download errors
Apex-dwhite Oct 18, 2018
5333534
Uninstall-LTService - Adjusted minimum size for agent_uninstall.exe
Apex-dwhite Oct 19, 2018
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80 changes: 47 additions & 33 deletions LabTech.psm1
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Original file line number Diff line number Diff line change
Expand Up @@ -527,7 +527,7 @@ Function Uninstall-LTService{
This will uninstall the LabTech agent using the provided server URL to download the uninstallers.

.NOTES
Version: 1.5
Version: 1.6
Author: Chris Taylor
Website: labtechconsulting.com
Creation Date: 3/14/2016
Expand All @@ -554,6 +554,10 @@ Function Uninstall-LTService{
Updated support of -WhatIf parameter.
Added minimum size requirement for agent installer to detect and skip a bad file download.

Update Date: 10/18/2018
Purpose/Change: Added minimum size requirement for agent uninstaller exe to detect and skip a bad file download.
Uninstall will proceed even if the agent uninstaller exe cannot be downloaded.

.LINK
http://labtechconsulting.com
#>
Expand All @@ -568,19 +572,20 @@ Function Uninstall-LTService{
)

Begin{
Clear-Variable Executables,BasePath,reg,regs,installer,installerTest,installerResult,LTSI,uninstaller,uninstallerTest,uninstallerResult,xarg,Svr,SVer,SvrVer,SvrVerCheck,GoodServer,Item -EA 0 -WhatIf:$False -Confirm:$False #Clearing Variables for use
Write-Debug "Starting $($myInvocation.InvocationName)"
Clear-Variable Executables,BasePath,reg,regs,installer,installerTest,installerResult,LTSI,uninstaller,uninstallerTest,uninstallerResult,xarg,Svr,SVer,SvrVer,SvrVerCheck,GoodServer,AlternateServer,Item -EA 0 -WhatIf:$False -Confirm:$False #Clearing Variables for use
Set-Alias -name LINENUM -value Get-CurrentLineNumber -WhatIf:$False -Confirm:$False
Write-Debug "Starting $($myInvocation.InvocationName) at line $(LINENUM)"

If (-not ([bool](([System.Security.Principal.WindowsIdentity]::GetCurrent()|Select-object -Expand groups -EA 0) -match 'S-1-5-32-544'))) {
Throw "Needs to be ran as Administrator"
Throw "Line $(LINENUM): Needs to be ran as Administrator"
}

$LTSI = Get-LTServiceInfo -EA 0 -Verbose:$False -WhatIf:$False -Confirm:$False -Debug:$False
If (($LTSI) -and ($LTSI|Select-Object -Expand Probe -EA 0) -eq '1') {
If ($Force -eq $True) {
Write-Output "Probe Agent Detected. UnInstall Forced."
} Else {
Write-Error -Exception [System.OperationCanceledException]"Probe Agent Detected. UnInstall Denied." -ErrorAction Stop
Write-Error -Exception [System.OperationCanceledException]"Line $(LINENUM): Probe Agent Detected. UnInstall Denied." -ErrorAction Stop
}#End If
}#End If

Expand Down Expand Up @@ -655,14 +660,14 @@ Function Uninstall-LTService{

Write-Debug "Raw Response: $SvrVer"
$SVer = $SvrVer|select-string -pattern '(?<=[|]{6})[0-9]{1,3}\.[0-9]{1,3}'|ForEach-Object {$_.matches}|Select-Object -Expand value -EA 0
If (($SVer) -eq $Null) {
If ($Null -eq ($SVer)) {
Write-Verbose "Unable to test version response from $($Svr)."
Continue
}
if ([System.Version]$SVer -ge [System.Version]'110.374') {
If ([System.Version]$SVer -ge [System.Version]'110.374') {
#New Style Download Link starting with LT11 Patch 13 - Direct Location Targeting is no longer available
$installer = "$($Svr)/Labtech/Deployment.aspx?Probe=1&installType=msi&MSILocations=1"
} else {
} Else {
#Original Generic Installer URL - Yes, these both reference Location 1 and are thus the same. Will it change in Patch 14? This section is now ready.
$installer = "$($Svr)/Labtech/Deployment.aspx?Probe=1&installType=msi&MSILocations=1"
}
Expand All @@ -676,26 +681,30 @@ Function Uninstall-LTService{
$installerResult = $installerTest.GetResponse()
$installerTest.Abort()
If ($installerResult.StatusCode -ne 200) {
Write-Warning "Unable to download Agent_Install.msi from server $($Svr)."
Write-Warning "Line $(LINENUM): Unable to download Agent_Install.msi from server $($Svr)."
Continue
}
Else{
Else {
If ($PSCmdlet.ShouldProcess("$installer", "DownloadFile")) {
Write-Debug "Downloading Agent_Install.msi from $installer"
$Script:LTServiceNetWebClient.DownloadFile($installer,"$env:windir\temp\LabTech\Installer\Agent_Install.msi")
If((Test-Path "$env:windir\temp\LabTech\Installer\Agent_Install.msi") -and !((Get-Item "$env:windir\temp\LabTech\Installer\Agent_Install.msi" -EA 0).length/1KB -gt 1234)) {
Write-Warning "Agent_Install.msi size is below normal. Removing suspected corrupt file."
Remove-Item "$env:windir\temp\LabTech\Installer\Agent_Install.msi" -ErrorAction SilentlyContinue -Force -Confirm:$False
Continue
If ((Test-Path "$env:windir\temp\LabTech\Installer\Agent_Install.msi")) {
If (!((Get-Item "$env:windir\temp\LabTech\Installer\Agent_Install.msi" -EA 0).length/1KB -gt 1234)) {
Write-Warning "Line $(LINENUM): Agent_Install.msi size is below normal. Removing suspected corrupt file."
Remove-Item "$env:windir\temp\LabTech\Installer\Agent_Install.msi" -ErrorAction SilentlyContinue -Force -Confirm:$False
Continue
} Else {
$AlternateServer = $Svr
}#End If
}#End If
}#End If
}#End If

#Using $SVer results gathered above.
if ([System.Version]$SVer -ge [System.Version]'110.374') {
If ([System.Version]$SVer -ge [System.Version]'110.374') {
#New Style Download Link starting with LT11 Patch 13 - The Agent Uninstaller URI has changed.
$uninstaller = "$($Svr)/Labtech/Deployment.aspx?ID=-2"
} else {
} Else {
#Original Uninstaller URL
$uninstaller = "$($Svr)/Labtech/Deployment.aspx?probe=1&ID=-2"
}
Expand All @@ -709,27 +718,32 @@ Function Uninstall-LTService{
$uninstallerResult = $uninstallerTest.GetResponse()
$uninstallerTest.Abort()
If ($uninstallerResult.StatusCode -ne 200) {
Write-Warning "Unable to download Agent_Uninstall from server."
Write-Warning "Line $(LINENUM): Unable to download Agent_Uninstall from server."
Continue
} Else {
#Download Agent_Uninstall.exe
If ($PSCmdlet.ShouldProcess("$uninstaller", "DownloadFile")) {
Write-Debug "Downloading Agent_Uninstall.exe from $uninstaller"
$Script:LTServiceNetWebClient.DownloadFile($uninstaller,"$($env:windir)\temp\Agent_Uninstall.exe")
}
If ((Test-Path "$($env:windir)\temp\Agent_Uninstall.exe") -and !((Get-Item "$($env:windir)\temp\Agent_Uninstall.exe" -EA 0).length/1KB -gt 80)) {
Write-Warning "Line $(LINENUM): Agent_Uninstall.exe size is below normal. Removing suspected corrupt file."
Remove-Item "$($env:windir)\temp\Agent_Uninstall.exe" -ErrorAction SilentlyContinue -Force -Confirm:$False
Continue
}#End If
}#End If
}#End If
If ($WhatIfPreference -eq $True) {
$GoodServer = $Svr
} ElseIf ((Test-Path "$env:windir\temp\LabTech\Installer\Agent_Install.msi") -and (Test-Path "$($env:windir)\temp\Agent_Uninstall.exe")) {
$GoodServer = $Svr
Write-Verbose "Successfully downloaded files from $($Svr)."
} Else {
Write-Warning "Error encountered downloading from $($Svr). Uninstall file(s) could not be received."
Write-Warning "Line $(LINENUM): Error encountered downloading from $($Svr). Uninstall file(s) could not be received."
Continue
}#End If
}#End Try
Catch {
Write-Warning "Error encountered downloading from $($Svr)."
Write-Warning "Line $(LINENUM): Error encountered downloading from $($Svr)."
Continue
}
} Else {
Expand All @@ -743,30 +757,30 @@ Function Uninstall-LTService{
}#End Process

End{
if ($GoodServer) {
If ($GoodServer -match 'https?://.+' -or $AlternateServer -match 'https?://.+') {
Try{
Write-Output "Starting Uninstall."

try { Stop-LTService -ErrorAction SilentlyContinue } catch {}
Try { Stop-LTService -ErrorAction SilentlyContinue } Catch {}

#Kill all running processes from %ltsvcdir%
if (Test-Path $BasePath){
If (Test-Path $BasePath){
$Executables = (Get-ChildItem $BasePath -Filter *.exe -Recurse -ErrorAction SilentlyContinue|Select-Object -Expand FullName)
if ($Executables) {
If ($Executables) {
Write-Verbose "Terminating LabTech Processes from $($BasePath) if found running: $(($Executables) -replace [Regex]::Escape($BasePath),'' -replace '^\\','')"
Get-Process | Where-Object {$Executables -contains $_.Path } | ForEach-Object {
Write-Debug "Terminating Process $($_.ProcessName)"
$($_) | Stop-Process -Force -ErrorAction SilentlyContinue
}
Get-ChildItem $BasePath -Filter labvnc.exe -ErrorAction SilentlyContinue | Remove-Item -Force -ErrorAction 0
}
}#End If

If ($PSCmdlet.ShouldProcess("$($BasePath)\wodVPN.dll", "Unregister DLL")) {
#Unregister DLL
Write-Debug "Executing Command ""regsvr32.exe /u $($BasePath)\wodVPN.dll /s"""
Try {& "$env:windir\system32\regsvr32.exe" /u "$($BasePath)\wodVPN.dll" /s 2>''}
Catch {Write-Output "Error calling regsvr32.exe."}
}
}#End If
}#End If

If ($PSCmdlet.ShouldProcess("msiexec.exe $($xarg)", "Execute MSI Uninstall")) {
Expand Down Expand Up @@ -801,7 +815,7 @@ Function Uninstall-LTService{
Write-Debug "Removing Service: $($_)"
Try {& "$env:windir\system32\sc.exe" delete "$($_)" 2>''}
Catch {Write-Output "Error calling sc.exe."}
}#End If
}#End If
}#End If
}#End ForEach-Object

Expand All @@ -822,7 +836,7 @@ Function Uninstall-LTService{

Write-Verbose "Cleaning Registry Keys if found."
#Remove all registry keys - Depth First Value Removal, then Key Removal, to get as much removed as possible if complete removal fails
foreach ($reg in $regs) {
Foreach ($reg in $regs) {
If ((Test-Path "$($reg)" -EA 0)) {
Write-Debug "Found Registry Key: $($reg)"
If ( $PSCmdlet.ShouldProcess("$($Reg)","Remove Registry Key") ) {
Expand All @@ -836,7 +850,7 @@ Function Uninstall-LTService{
}#End Try

Catch{
Write-Error "ERROR: There was an error during the uninstall process. $($Error[0])" -ErrorAction Stop
Write-Error "ERROR: Line $(LINENUM): There was an error during the uninstall process. $($Error[0])" -ErrorAction Stop
}#End Catch

If ($WhatIfPreference -ne $True) {
Expand All @@ -846,7 +860,7 @@ Function Uninstall-LTService{
Start-Sleep -Seconds 10
}#End If
If((Test-Path "$env:windir\ltsvc") -or (Test-Path "$env:windir\temp\_ltudpate") -or (Test-Path registry::HKLM\Software\LabTech\Service) -or (Test-Path registry::HKLM\Software\WOW6432Node\Labtech\Service)){
Write-Error "Remnants of previous install still detected after uninstall attempt. Please reboot and try again."
Write-Error "Line $(LINENUM): Remnants of previous install still detected after uninstall attempt. Please reboot and try again."
} Else {
Write-Output "LabTech has been successfully uninstalled."
}#End If
Expand All @@ -855,9 +869,9 @@ Function Uninstall-LTService{
}#End If
}#End If
} ElseIf ($WhatIfPreference -ne $True) {
Write-Error "ERROR: No valid server was reached to use for the uninstall." -ErrorAction Stop
Write-Error "ERROR: Line $(LINENUM): No valid server was reached to use for the uninstall." -ErrorAction Stop
}#End If
Write-Debug "Exiting $($myInvocation.InvocationName)"
Write-Debug "Exiting $($myInvocation.InvocationName) at line $(LINENUM)"
}#End End
}#End Function Uninstall-LTService
#endregion Uninstall-LTService
Expand Down Expand Up @@ -1550,7 +1564,7 @@ Function Update-LTService{
$SvrVer = $Script:LTServiceNetWebClient.DownloadString($SvrVerCheck)
Write-Debug "Raw Response: $SvrVer"
$SVer = $SvrVer|select-string -pattern '(?<=[|]{6})[0-9]{1,3}\.[0-9]{1,3}'|ForEach-Object {$_.matches}|Select-Object -Expand value -EA 0
If (($SVer) -eq $Null) {
If ($Null -eq ($SVer)) {
Write-Verbose "Unable to test version response from $($Svr)."
Continue
}
Expand Down