usr/etc/Get-Uptime.ps1
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function Get-Uptime { [CmdletBinding()]param() begin { New-Delegate ntdll { int NtQuerySystemInformation([int, buf, int, buf]) } New-Structure SYSTEM_TIMEOFDAY_INFORMATION { Int64 BootTime Int64 CurrentTime Int64 TimeZoneBias UInt32 TimeZondeId UInt32 Reserved UInt64 BootTimeBias UInt64 SleepTimeBias } } process {} end { $buf = [Byte[]]::new([SYSTEM_TIMEOFDAY_INFORMATION]::GetSize()) if (($nts = $ntdll.NtQuerySystemInformation.Invoke(3, $buf, $buf.Length, $null)) -ne 0) { throw (ConvertTo-ErrMessage -NtStatus $nts) } $sti = ConvertTo-PointerOrStructure $buf ([SYSTEM_TIMEOFDAY_INFORMATION]) [TimeSpan]::FromMilliseconds(($sti.CurrentTime - $sti.BootTime) / 10000) } } |