rhubarb-geek-nz.SinceYouAsk

1.0.0

SinceYouAsk.psm1

# Copyright 2025, Roger Brown
# Licensed under the MIT License.

function Get-UptimeSince
{
    if ($IsWindows -or ('Desktop' -eq $PSEdition))
    {
        (Get-CimInstance -ClassName 'Win32_OperatingSystem').LastBootupTime
    }
    else
    {
        if ($IsLinux)
        {
            if (Get-Command -Name 'uptime' -ErrorAction 'Ignore')
            {
                $dateTime = (uptime -s) -split ' '
                $list = New-Object -TypeName 'System.Collections.ArrayList'
                $null = $list.AddRange([int32[]]($dateTime[0] -split '-'))
                $null = $list.AddRange([int32[]]($dateTime[1] -split ':'))
                $null = $list.Add([System.DateTimeKind]::Local)
                New-Object -TypeName 'System.DateTime' -ArgumentList $list.ToArray()
            }
            else
            {
                (Get-Item -LiteralPath '/proc/1').CreationTime
            }
        }
        else
        {
            $hash = New-Object -TypeName 'System.Collections.Hashtable'
            $eq = $null
            $name = $null

            foreach ($v in (sysctl kern.boottime) -split ' ')
            {
                if ($v.EndsWith(','))
                {
                    $v = $v.Substring(0, $v.Length - 1)
                }

                if ($eq -eq '=')
                {
                    $hash.$name = $v
                }

                $name = $eq
                $eq = $v
            }

            [DateTime]::UnixEpoch.AddSeconds($hash.sec).AddMicroseconds($hash.usec).ToLocalTime()
        }
    }
}

Export-ModuleMember -Function Get-UptimeSince