*****
[important]New version of the PowerShell WMI module 2.0 is out. It has now 19 cmdlets in total! To get the latest version of it, click here [/important]
*****
Have you ever needed to create a new WMI property ? Have you ever needed to create that WMI property in a specefic (and new) WMI class ?
Well, if you did, the WMI-Module is what you are looking for then !
After setting up the method on how to measure a Task sequence time (which I explained here), I needed to add it at the end of our task sequence in the “tatoo” section.
In OSD, we generaly like to put the same information, in various locations : Registry, environment variable and in the WMI repository. The registry and environment variable are pretty easy (or lets say that was something I had already done before), but how do we actually add a WMI property and a new WMI class ?
That is a good question right ?
I have started to write some cmdlets in order to create a class, then a property, then to import or export MOF files, and sooner then I thought, I came up with the WMI PowerShell Module.
And it is my turn to give something back to the PowerShell community.
For now, the module is composed of the following cmdlets :
Compile-MofFile
Export-MofFile
Get-WMIClass
Get-WMICommands
New-WMIClass
New-WMIProperty
Remove-WMIClass
Remove-WMIProperty
Set-WMIPropertyValue
New cmdlets will probably still come, and most likley, with your very valuable feedback, I will publish a new updated version with any eventual bug fixes etc…
[important]Download the latest version of the module on technet right here.[/important]
Here under you will also have the current listing of the module. You can either download it from technet here, or copy paste the listing here below in a new text file called “WMI-Module.psm1”
Listing WMI-Module.psm1
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Function New-WMIClass {
<#
.SYNOPSIS
This function help to create a new WMI class.
.DESCRIPTION
The function allows to create a WMI class in the CimV2 namespace.
Accepts a single string, or an array of strings.
.PARAMETER ClassName
Specify the name of the class that you would like to create. (Can be a single string, or a array of strings).
.PARAMETER NameSpace
Specify the namespace where class the class should be created.
If not specified, the class will automatically be created in “Rootcimv2”
.EXAMPLE
New-WMIClass -ClassName “PowerShellDistrict”
Creates a new class called “PowerShellDistrict”
.EXAMPLE
New-WMIClass -ClassName “aaaa”,“bbbb”
Creates two classes called “aaaa” and “bbbb” in the Rootcimv2
.NOTES
Version: 1.0
Author: Stephane van Gulick
Creation date:16.07.2014
Last modification date: 16.07.2014
.LINK
www.powershellDistrict.com
.LINK
http://social.technet.microsoft.com/profile/st%C3%A9phane%20vg/
#>
[/fusion_builder_column][fusion_builder_column type=“1_1” background_position=“left top” background_color=“” border_size=“” border_color=“” border_style=“solid” spacing=“yes” background_image=“” background_repeat=“no-repeat” padding=“” margin_top=“0px” margin_bottom=“0px” class=“” id=“” animation_type=“” animation_speed=“0.3” animation_direction=“left” hide_on_mobile=“no” center_content=“no” min_height=“none”][CmdletBinding()]
Param(
[Parameter(Mandatory=$true,valueFromPipeLine=$true)][string[]]$ClassName,
[Parameter(Mandatory=$false)][string]$NameSpace = “rootcimv2”
)
foreach ($NewClass in $ClassName){
if (!(Get-WMIClass -ClassName $NewClass -NameSpace $NameSpace)){
write-verbose “Attempting to create class $($NewClass)”
$WMI_Class = “”
$WMI_Class = New-Object System.Management.ManagementClass($NameSpace, $null, $null)
$WMI_Class.name = $NewClass
$WMI_Class.Put() | out-null
write-host “Class $($NewClass) created.”
}else{
write-host “Class $($NewClass) is already present. Skiping..”
}
}
}
Function New-WMIProperty {
<#
.SYNOPSIS
This function help to create new WMI properties.
.DESCRIPTION
The function allows to create new properties and set their values into a newly created WMI Class.
Event though it is possible, it is not recommended to create WMI properties in existing WMI classes !
.PARAMETER ClassName
Specify the name of the class where you would like to create the new properties.
.PARAMETER PropertyName
The name of the property.
.PARAMETER PropertyValue
The value of the property.
.EXAMPLE
New-WMIProperty -ClassName “PowerShellDistrict” -PropertyName “WebSite” -PropertyValue “www.PowerShellDistrict.com”
.NOTES
Version: 1.0
Author: Stephane van Gulick
Creation date:16.07.2014
Last modification date: 16.07.2014
.LINK
www.powershellDistrict.com
.LINK
http://social.technet.microsoft.com/profile/st%C3%A9phane%20vg/
#>
[CmdletBinding()]
Param(
[Parameter(Mandatory=$true)]
[ValidateScript({
$_ -ne “”
})]
[string]$ClassName,
[Parameter(Mandatory=$false)]
[string]$NameSpace=“Rootcimv2”,
[Parameter(Mandatory=$true)][string]$PropertyName,
[Parameter(Mandatory=$false)][string]$PropertyValue=“”
)
begin{
[wmiclass]$WMI_Class = Get-WmiObject -Class $ClassName -Namespace $NameSpace -list
}
Process{
write-verbose “Attempting to create property $($PropertyName) with value: $($PropertyValue) in class: $($ClassName)”
$WMI_Class.Properties.add($PropertyName,$PropertyValue)
Write-Output “Added $($PropertyName).”
}
end{
$WMI_Class.Put() | Out-Null
[wmiclass]$WMI_Class = Get-WmiObject -Class $ClassName -list
return $WMI_Class
}
}
Function Set-WMIPropertyValue {
<#
.SYNOPSIS
This function set a WMI property value.
.DESCRIPTION
The function allows to set a new value in an existing WMI property.
.PARAMETER ClassName
Specify the name of the class where the property resides.
.PARAMETER PropertyName
The name of the property.
.PARAMETER PropertyValue
The value of the property.
.EXAMPLE
New-WMIProperty -ClassName “PowerShellDistrict” -PropertyName “WebSite” -PropertyValue “www.PowerShellDistrict.com”
Sets the property “WebSite” to “www.PowerShellDistrict.com”
.EXAMPLE
New-WMIProperty -ClassName “PowerShellDistrict” -PropertyName “MainTopic” -PropertyValue “PowerShellDistrict”
Sets the property “MainTopic” to “PowerShell”
.NOTES
Version: 1.0
Author: Stephane van Gulick
Creation date:16.07.2014
Last modification date: 16.07.2014
.LINK
www.powershellDistrict.com
.LINK
http://social.technet.microsoft.com/profile/st%C3%A9phane%20vg/
#>
[CmdletBinding()]
Param(
[Parameter(Mandatory=$true)]
[ValidateScript({
$_ -ne “”
})]
[string]$ClassName,
[Parameter(Mandatory=$false)]
[string]$NameSpace=“Rootcimv2”,
[Parameter(Mandatory=$true)]
[ValidateScript({
$_ -ne “”
})]
[string]$PropertyName,
[Parameter(Mandatory=$true)]
[string]$PropertyValue
)
begin{
write-verbose “Setting new value : $($PropertyValue) on property: $($PropertyName):”
[wmiclass]$WMI_Class = Get-WmiObject -Class $ClassName -list
}
Process{
$WMI_Class.SetPropertyValue($PropertyName,$PropertyValue)
}
End{
$WMI_Class.Put() | Out-Null
return Get-WmiObject -Class $ClassName -list
}
}
Function Remove-WMIProperty{
<#
.SYNOPSIS
This function removes a WMI property.
.DESCRIPTION
The function allows to remove a specefic WMI property from a specefic WMI class.
/!Be aware that any wrongly deleted WMI properties could make your system unstable./!
.PARAMETER ClassName
Specify the name of the class name.
.PARAMETER PropertyName
The name of the property.
.EXAMPLE
Remove-WMIProperty -ClassName “PowerShellDistrict” -PropertyName “MainTopic”
Removes the WMI property “MainTopic”.
.NOTES
Version: 1.0
Author: Stephane van Gulick
Creation date:21.07.2014
Last modification date: 24.07.2014
.LINK
www.powershellDistrict.com
.LINK
http://social.technet.microsoft.com/profile/st%C3%A9phane%20vg/
#>
[CmdletBinding()]
Param(
[Parameter(Mandatory=$true)][string]$ClassName,
[Parameter(Mandatory=$true)][string]$PropertyName,
[Parameter(Mandatory=$false)][string]$NameSpace = “RootCimv2”,
[Parameter(Mandatory=$false)][string]$Force
)
if ($PSBoundParameters[‘NameSpace’]){
[wmiclass]$WMI_Class = Get-WmiObject -Class $ClassName -Namespace $NameSpace -list
}
else{
write-verbose “Gaterhing data of $($ClassName)”
[wmiclass]$WMI_Class = Get-WmiObject -Class $ClassName -list
}
if (!($force)){
$Answer = Read-Host “Deleting $($PropertyName) can make your system unreliable. Press ‘Y’ to continue”
if ($Answer -eq“Y”){
$WMI_Class.Properties.remove($PropertyName)
write-ouput “Property $($propertyName) removed.”
}else{
write-ouput “Uknowned answer. Class ‘$($PropertyName)’ has not been deleted.”
}
}#End force
elseif ($force){
$WMI_Class.Properties.remove($PropertyName)
write-ouput “Property $($propertyName) removed.”
}
}
Function Remove-WMIClass {
<#
.SYNOPSIS
This function removes a WMI class from the WMI repository.
/! Removing a wrong WMI class could make your system unreliable. Use wisely and at your own risk /!
.DESCRIPTION
The function deletes a WMI class from the WMI repository. Use this function wiseley as this could make your system unstable if wrongly used.
.PARAMETER ClassName
Specify the name of the class that you would like to delete.
.PARAMETER NameSpace
Specify the name of the namespace where the WMI class resides (default is Rootcimv2).
.PARAMETER Force
Will delete the class without asking for confirmation.
.EXAMPLE
Remove-WMIClass -ClassName “PowerShellDistrict”
This will launch an attempt to remove the WMI class PowerShellDistrict from the repository. The user will be asked for confirmation before deleting the class.
.EXAMPLE
Remove-WMIClass -ClassName “PowerShellDistrict” -force
This will remove the WMI PowerShellDistrict class from the repository. The user will NOT be asked for confirmation before deleting the class.
.NOTES
Version: 1.0
Author: Stephane van Gulick
Creation date:18.07.2014
Last modification date: 24.07.2014
.LINK
www.powershellDistrict.com
.LINK
http://social.technet.microsoft.com/profile/st%C3%A9phane%20vg/
#>
[CmdletBinding()]
Param(
[parameter(mandatory=$true,valuefrompipeline=$true)]
[ValidateScript({
$_ -ne “”
})]
[string[]]$ClassName,
[Parameter(Mandatory=$false)]
[string]$NameSpace = “RootCimV2”,
[Parameter(Mandatory=$false)]
[Switch]$Force
)
write-verbose “Attempting to delete classes”
foreach ($Class in $ClassName){
if(!($Class)){
write-verbose “Class name is empty. Skipping…”
}else{
[wmiclass]$WMI_Class = Get-WmiObject -Namespace $NameSpace -Class $Class -list
if ($WMI_Class){
if (!($force)){
write-host
$Answer = Read-Host “Deleting $($Class) can make your system unreliable. Press ‘Y’ to continue”
if ($Answer -eq“Y”){
$WMI_Class.Delete()
write-output “$($Class) deleted.”
}else{
write-output “Uknowned answer. Class ‘$($class)’ has not been deleted.”
}
}
elseif ($force){
$WMI_Class.Delete()
write-output “$($Class) deleted.”
}
}Else{
write-output “Class $($Class) not present”
}#End if WMI_CLASS
}#EndIfclass emtpy
}#End foreach
}
Function Compile-MofFile{
<#
.SYNOPSIS
This function will compile a mof file.
.DESCRIPTION
The function allows to create new WMI Namespaces, classes and properties by compiling a MOF file.
Important: Using the Compile-MofFile cmdlet, assures that the newly created WMI classes and Namespaces also will be recreated in case of WMI rebuild.
.PARAMETER MofFile
Specify the complete path to the MOF file.
.EXAMPLE
Compile-MofFile -MofFile C:tatoo.mof
.NOTES
Version: 1.0
Author: Stéphane van Gulick
Creation date:18.07.2014
Last modification date: 18.07.2014
History : Creation : 18.07.2014 —> SVG
.LINK
www.powershellDistrict.com
.LINK
http://social.technet.microsoft.com/profile/st%C3%A9phane%20vg/
#>
[CmdletBinding()]
Param(
[Parameter(Mandatory=$true)]
[ValidateScript({
test-path $_
})][string]$MofFile
)
begin{
if (test-path “C:WindowsSystem32wbemmofcomp.exe”){
$MofComp = get-item “C:WindowsSystem32wbemmofcomp.exe”
}
}
Process{
Invoke-expression “& $MofComp $MofFile”
Write-Output “Mof file compilation actions finished.”
}
End{
}
}
Function Export-MofFile {
<#
.SYNOPSIS
This function export a specefic class to a MOF file.
.DESCRIPTION
The function allows export specefic WMI Namespaces, classes and properties by exporting the data to a MOF file format.
Use the Generated MOF file in whit the cmdlet “Compile-MofFile” in order to import, or re-import the existing class.
.PARAMETER MofFile
Specify the complete path to the MOF file.(Must contain “.mof” as extension.
.EXAMPLE
Export-MofFile -ClassName “PowerShellDistrict” -Path “C:tempPowerShellDistrict_Class.mof”
.NOTES
Version: 1.0
Author: Stéphane van Gulick
Creation date:18.07.2014
Last modification date: 18.07.2014
History : Creation : 18.07.2014 —> SVG
.LINK
www.powershellDistrict.com
.LINK
http://social.technet.microsoft.com/profile/st%C3%A9phane%20vg/
#>
[CmdletBinding()]
Param(
[parameter(mandatory=$true)]
[ValidateScript({
$_.endsWith(“.mof”)
})]
[string]$Path,
[parameter(mandatory=$true)]
[string]$ClassName,
[Parameter(Mandatory=$false)]
[string]$NameSpace = “RootCimV2”
)
begin{}
Process{
if ($PSBoundParameters[‘ClassName’]){
write-verbose “Checking for Namespace: $($Namespace) and Class $($Classname)”
[wmiclass]$WMI_Info = Get-WmiObject -Namespace $NameSpace -Class $ClassName -list
}
else{
[wmi]$WMI_Info = Get-WmiObject -Namespace $NameSpace -list
}
[system.management.textformat]$mof = “mof”
$MofText = $WMI_Info.GetText($mof)
Write-Output “Exporting infos to $($path)”
“#PRAGMA AUTORECOVER” | out-file -FilePath $Path
$MofText | out-file -FilePath $Path -Append
}
End{
return Get-Item $Path
}
}
Function Get-WMIClass{
<#
.SYNOPSIS
get information about a specefic WMI class.
.DESCRIPTION
returns the listing of a WMI class.
.PARAMETER ClassName
Specify the name of the class that needs to be queried.
.PARAMETER NameSpace
Specify the name of the namespace where the class resides in (default is “Rootcimv2”).
.EXAMPLE
get-wmiclass
List all the Classes located in the rootcimv2 namespace (default location).
.EXAMPLE
get-wmiclass -classname win32_bios
Returns the Win32_Bios class.
.EXAMPLE
get-wmiclass -classname MyCustomClass
Returns information from MyCustomClass class located in the default namespace (Rootcimv2).
.EXAMPLE
Get-WMIClass -NameSpace rootccm -ClassName *
List all the Classes located in the rootccm namespace
.EXAMPLE
Get-WMIClass -NameSpace rootccm -ClassName ccm_client
Returns information from the cm_client class located in the rootccm namespace.
.NOTES
Version: 1.0
Author: Stephane van Gulick
Creation date:23.07.2014
Last modification date: 23.07.2014
.LINK
www.powershellDistrict.com
.LINK
http://social.technet.microsoft.com/profile/st%C3%A9phane%20vg/
#>
[CmdletBinding()]
Param(
[Parameter(Mandatory=$false,valueFromPipeLine=$true)][string]$ClassName,
[Parameter(Mandatory=$false)][string]$NameSpace = “rootcimv2”
)
begin{
write-verbose “Getting WMI class $($Classname)”
}
Process{
if (!($ClassName)){
$return = Get-WmiObject -Namespace $NameSpace -Class * -list
}else{
$return = Get-WmiObject -Namespace $NameSpace -Class $ClassName -list
}
}
end{
return $return
}
}
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