Does Restart-Computer expose an equivalent to shutdown /r /fw?

[RokeJulianLockhart]

I want to reboot to the EFI, but would like to not rely upon a Windows binary if I can, even if the PowerShell alternative isn't (yet) cross-platform, if one exists.

Currently, I have similar to:

#!/usr/bin/env pwsh

# Prerequisites
# -------------

	# ~~~pwsh
	# #Requires -PSEdition 'Core'
	# #Requires -Version 7.5.0
	# ~~~

# Reinitialiser
# -------------

	If ([OperatingSystem]::IsWindows())
	{
		sudo shutdown /r /fw /t 0
			# [^1] [^3]
	}

	ElseIf ([OperatingSystem]::IsLinux())
	{
		If ($Env:XDG_CURRENT_DESKTOP -Eq 'KDE')
		{
			busctl call org.freedesktop.login1 /org/freedesktop/login1 org.freedesktop.login1.Manager SetRebootToFirmwareSetup b true
			If ($? -Eq $True) {
				$AppendedCommand = ' org.kde.Shutdown /Shutdown org.kde.Shutdown.logoutAndReboot'
					# [^2]
				$Binaries = @(
					'qdbus-qt6',
					'qdbus6',
					'qdbus'
				)
				ForEach ($Binary In $Binaries)
				{
					If (
							Get-Command `
								-Name $Binary `
								-ErrorAction SilentlyContinue
						)
					{
						Invoke-Expression -Command "$Binary$AppendedCommand"
						Break
					}
				}
			}
		}
	}

# Citations
# ---------

	# [^1]: [`superuser.com/revisions/1803550/3`][1]

	# [^2]: [`discuss.kde.org/t/743/38`][2]

	# [^3]: [`github.com/PowerShell/PowerShell/discussions/25734`][2]

# URIs
# ----

	# [1]: https://superuser.com/revisions/1803550/3#content:~:text=shutdown%20/r%20/fw%20(requires%20elevation)%20per%20Microsoft's%20documentation

	# [2]: https://discuss.kde.org/t/logout-reboot-and-shutdown-using-the-terminal/743/38?u=rokejulianlockhart#post_38:~:text=this%20worked%20indeed:,qdbus%20org.kde.Shutdown%20/Shutdown%20org.kde.Shutdown.logoutAndReboot

	# [3]: https://github.com/PowerShell/PowerShell/discussions/25734#discussion-8544826

[SamErde]

Are you looking for a cross-platform solution? If so, please note this information directly from the documentation (/HT @sdwheeler)

In PowerShell 7.1, Restart-Computer was added for Linux and macOS. The non-Windows platforms only have the WhatIf, Confirm, and CommonParameters parameters. The cmdlet is just calling the native command /sbin/shutdown.

For Windows, Restart-Computer uses WMI, likely through .NET’s System.Management namespace.

In Windows, Restart-Computer uses the Win32Shutdown method of the Windows Management Instrumentation (WMI) Win32_OperatingSystem class. This method requires the SeShutdownPrivilege privilege be enabled for the user account used to restart the machine.

[RokeJulianLockhart]

@SamErde, thanks. I wanted a more consistent solution, but neither DotNet nor WMIC appear to expose any way to reboot to the EFI firmware UI, much less PowerShell. A shame.