PowerShell: Get-Uptime for Computer(s)

I needed to check the server uptime for multiple servers, and well, I wanted to do it in PowerShell.  I found a sample from MSDN, and modified it, and threw it into a function.

Function Get-Uptime
{
	#Requires -version 2
	[CmdletBinding(SupportsShouldProcess=$true,ConfirmImpact="High")]
	Param(
	[parameter(Mandatory=$false,HelpMessage="Computer Name(s)",ValueFromPipeline=$true)]
	[object[]]$ComputerName = "."
	)
	PROCESS
	{
		$WmiOS = Get-WMIObject -class Win32_OperatingSystem -computer $ComputerName
		Function ConvertWMIDateToDateTime($BootTime)
		{
			[System.Management.ManagementDateTimeconverter]::ToDateTime($BootTime)
		}
		Function GetUptime($ComputerName)
		{
			$BootTime = $WmiOS.LastBootUpTime
			$LastBootUpTime = ConvertWMIDateToDateTime($BootTime)
			$Uptime = (Get-Date) - $lastBootUpTime
			$days = $Uptime.Days
			$hours = $Uptime.Hours
			$min = $uptime.Minutes
			$sec = $uptime.Seconds
			[console]::ForegroundColor = "Green"
			"$($ComputerName) has been up for: {0} days, {1} hours, {2} minutes and {3} seconds" -f $days,$hours,$min,$sec
			[console]::ResetColor()
		}
		GetUptime $ComputerName
	}
	<#
		.SYNOPSIS
		Gets uptime of a system via WMI

		.DESCRIPTION
		Get-Uptime uses WMI (specificaly Win32_ComputerSystem) to get the uptime of a system.
		The core component of the script was found at http://msdn.microsoft.com/en-us/library/aa394591(VS.85).aspx
		and addapted with additional functionality.

		.EXAMPLE
		PS c:\> Get-UpTime SERVER01
		SERVER01 has been up for: 355 days, 23 hours, 59 minutes and 59 seconds

		.EXAMPLE
		PS c:\> Get-ExchangeServer | Get-Uptime
		SERVER01 has been up for: 355 days, 23 hours, 59 minutes and 59 seconds
		SERVER02 has been up for: 355 days, 23 hours, 59 minutes and 59 seconds
		SERVER03 has been up for: 355 days, 23 hours, 59 minutes and 59 seconds
		SERVER04 has been up for: 355 days, 23 hours, 59 minutes and 59 seconds

		.LINK
		Script Posted to:

http://everydaynerd.com

		Adapted from sample posted at:

http://msdn.microsoft.com/en-us/library/aa394591(VS.85).aspx

		.NOTES
		Function Name : Get-UpTime
		Author: Dan Burgess
		Email: nerd@everydaynerd.com
		Script Requires:  Powershell 2.x or higher
	#>
}

Here’s an alternative to this function that outputs to a powershell object – rather than just writing to the screen. (Thanks for the encouragement Jeffery)

Function Get-Uptime
{
	#Requires -version 2
	[CmdletBinding(SupportsShouldProcess=$true,ConfirmImpact="High")]
	Param(
	[parameter(Mandatory=$true,HelpMessage="Computer Name(s)",ValueFromPipeline=$true)]
	[object[]]$ComputerName
	)
	PROCESS
	{
		$System = Get-WMIObject -class Win32_OperatingSystem -computer $ComputerName
		Function GetUptime($ComputerName)
		{
			$Bootup = $System.LastBootUpTime
			$LastBootUpTime = $System.ConvertToDateTime($System.LastBootUpTime)
			$now = Get-Date
			$Uptime = $now - $lastBootUpTime
			$NewObjectProperties = @{
				ComputerName=$ComputerName
				Days=$Uptime.Days;`
				Hours=$Uptime.Hours;`
				Minutes=$Uptime.Minutes;`
				Seconds=$Uptime.Seconds;`
				}
			New-Object psobject -Property $NewObjectProperties
		}
		$Results = GetUptime $ComputerName
		$Results | Select ComputerName, Days, Hours, Minutes, Seconds
	}
	<#
		.SYNOPSIS
		Gets uptime of a system via WMI

		.DESCRIPTION
		Get-Uptime uses WMI (specificaly Win32_ComputerSystem) to get the uptime of a system.
		The core component of the script was found at http://msdn.microsoft.com/en-us/library/aa394591(VS.85).aspx
		and addapted with additional functionality.

		.EXAMPLE
		PS c:\> Get-UpTime server01
		ComputerName : {server01}
		Days         : 27
		Hours        : 2
		Minutes      : 21
		Seconds      : 26

		.EXAMPLE
		PS c:\> Get-ExchangeServer | Get-Uptime | ft -AutoSize
		ComputerName Days Hours Minutes Seconds
		------------ ---- ----- ------- -------
		{server01}    27     2      15      49
		{server02}   130     6      40      23

		.LINK
		Script Posted to:

http://everydaynerd.com

		Adapted from sample posted at:

http://msdn.microsoft.com/en-us/library/aa394591(VS.85).aspx

		.NOTES
		Function Name : Get-UpTime
		Author: Dan Burgess
		Email: nerd@everydaynerd.com
		Script Requires:  Powershell 2.x or higher
	#>
}

Happy PowerShelling!

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