Add script to kill processes by patterns on Windows.

Author: riclolsen

platform-windows/kill_processes_by_pattern.ps1

@@ -0,0 +1,31 @@
+param(
+    [Parameter(Mandatory=$true)]
+    [string[]]$Patterns
+)
+
+# For each pattern, find processes where CommandLine contains the pattern, then terminate them.
+# Uses CIM (Get-CimInstance) instead of WMIC. Works on PowerShell 5.1 and later.
+
+$errors = @()
+foreach ($p in $Patterns) {
+    try {
+        # Escape single quotes in pattern for WQL-like contains by using simple substring match in PowerShell
+        $pat = $p
+        $matches = Get-CimInstance Win32_Process | Where-Object { $_.CommandLine -and ($_.CommandLine -like "*$pat*") }
+        foreach ($proc in $matches) {
+            try {
+                Write-Host "Terminating pid=$($proc.ProcessId) cmdline='$($proc.CommandLine)'"
+                $rc = $proc | Invoke-CimMethod -MethodName Terminate
+                if ($rc.ReturnValue -ne 0) { Write-Warning "Terminate returned $($rc.ReturnValue) for pid $($proc.ProcessId)" }
+            } catch {
+                Write-Warning "Failed to terminate pid $($proc.ProcessId): $_"
+                $errors += $_
+            }
+        }
+    } catch {
+        Write-Warning "Error querying processes for pattern '$p': $_"
+        $errors += $_
+    }
+}
+
+if ($errors.Count -gt 0) { exit 2 } else { exit 0 }