sysinfo_windows.ps1

#Requires -Version 3.0
<#
.SYNOPSIS
    Collects hardware, OS, and network information on Windows.
    Produces the same output structure as task4_1.sh.
.OUTPUTS
    sysinfo_windows.out in the same directory as this script.
#>

$OutputFile = Join-Path $PSScriptRoot "sysinfo_windows.out"
$lines = [System.Collections.Generic.List[string]]::new()

# ─────────────────────────────────────────────────────────────── Hardware ────

$lines.Add("--- Hardware ---")

# CPU
$cpu = (Get-CimInstance Win32_Processor | Select-Object -First 1).Name.Trim()
$lines.Add("CPU: $(if ($cpu) { $cpu } else { 'Unknown' })")

# RAM — total physical memory in MB
$ramBytes = (Get-CimInstance Win32_ComputerSystem).TotalPhysicalMemory
$ramMB    = [math]::Round($ramBytes / 1MB)
$lines.Add("RAM: $ramMB MB")

# Motherboard
$board = Get-CimInstance Win32_BaseBoard | Select-Object -First 1
$noData = @("", $null, "Not Available", "Not Specified", "To Be Filled By O.E.M.", "Default string")
$mfr  = if ($board.Manufacturer -and $board.Manufacturer.Trim() -notin $noData) { $board.Manufacturer.Trim() } else { "" }
$prod = if ($board.Product      -and $board.Product.Trim()      -notin $noData) { $board.Product.Trim()      } else { "Unknown" }
$mb   = if ($mfr) { "$mfr $prod" } else { $prod }
$lines.Add("Motherboard: $mb")

# System Serial Number
$serial = (Get-CimInstance Win32_BIOS | Select-Object -First 1).SerialNumber
if (-not $serial -or $serial.Trim() -in $noData) { $serial = "Unknown" }
$lines.Add("System Serial Number: $serial")

# ──────────────────────────────────────────────────────────────── System ─────

$lines.Add("--- System ---")

# OS Distribution
$osCaption = (Get-CimInstance Win32_OperatingSystem | Select-Object -First 1).Caption.Trim()
$lines.Add("OS Distribution: $(if ($osCaption) { $osCaption } else { 'Unknown' })")

# Kernel version (Windows build number)
$kernelVer = [System.Environment]::OSVersion.Version.ToString()
$lines.Add("Kernel version: $kernelVer")

# Installation date (UTC)
$installRaw = (Get-CimInstance Win32_OperatingSystem).InstallDate.ToUniversalTime()
$installStr = $installRaw.ToString("ddd MMM dd HH:mm:ss") + " UTC " + $installRaw.Year
$lines.Add("Installation date: $installStr")

# Hostname
$lines.Add("Hostname: $($env:COMPUTERNAME.ToLower())")

# Uptime — computed from last boot time
$lastBoot   = (Get-CimInstance Win32_OperatingSystem).LastBootUpTime
$totalMins  = [math]::Floor(((Get-Date) - $lastBoot).TotalMinutes)
$upWeeks    = [math]::Floor($totalMins / 10080)
$upDays     = [math]::Floor(($totalMins % 10080) / 1440)
$upHours    = [math]::Floor(($totalMins % 1440) / 60)
$upMins     = $totalMins % 60

$uptimeParts = @()
if ($upWeeks -gt 0) { $uptimeParts += "$upWeeks weeks" }
if ($upDays  -gt 0) { $uptimeParts += "$upDays days"   }
if ($upHours -gt 0) { $uptimeParts += "$upHours hours" }
if ($upMins  -gt 0) { $uptimeParts += "$upMins minutes" }
if ($uptimeParts.Count -eq 0) { $uptimeParts = @("0 minutes") }
$lines.Add("Uptime: $($uptimeParts -join ', ')")

# Processes running
$lines.Add("Processes running: $((Get-Process).Count)")

# Users logged in — interactive and remote-interactive sessions
$userSessions = Get-CimInstance Win32_LogonSession |
    Where-Object { $_.LogonType -in @(2, 10) }
$lines.Add("Users logged in: $(($userSessions | Measure-Object).Count)")

# ────────────────────────────────────────────────────────────── Network ──────

$lines.Add("--- Network ---")

Get-NetAdapter | Sort-Object InterfaceIndex | ForEach-Object {
    $adapterName = $_.Name
    $addrs = Get-NetIPAddress -InterfaceIndex $_.InterfaceIndex `
                              -AddressFamily IPv4 `
                              -ErrorAction SilentlyContinue
    if ($addrs) {
        $ipList = ($addrs | ForEach-Object { "$($_.IPAddress)/$($_.PrefixLength)" }) -join ", "
        $lines.Add("${adapterName}: $ipList")
    } else {
        $lines.Add("${adapterName}: -")
    }
}

# ─────────────────────────────────────────────────────────────── Output ──────

$lines | Set-Content -Path $OutputFile -Encoding UTF8
Write-Host "Written: $OutputFile"