Add option to reboot device after a certain amount of time

subsystems/provisioning/definitions.go

@@ -299,6 +299,12 @@ func ConfigFromJSON(defaultConf Config, jsonBytes []byte) (*Config, error) {
 		return &conf, errw.Errorf("timeout values cannot be less than %s", time.Duration(minTimeout))
 	}
 
+	if conf.DeviceRebootAfterOfflineMinutes != 0 &&
+		conf.DeviceRebootAfterOfflineMinutes < int(time.Duration(conf.OfflineTimeout).Minutes()) &&
+		conf.DeviceRebootAfterOfflineMinutes < int(time.Duration(conf.UserTimeout).Minutes()) {
+		return &conf, errw.Errorf("device_reboot_after_offline_minutes cannot be less than offline_timeout or user_timeout")
+	}
+
 	return &conf, nil
 }
 
@@ -372,6 +378,10 @@ type Config struct {
 
 	// If set, will explicitly enable or disable power save for all wifi connections managed by NetworkManager.
 	WifiPowerSave *bool `json:"wifi_power_save"`
+
+	// If set, will reboot the device after it has been offline for this duration
+	// 0 will disable this feature.
+	DeviceRebootAfterOfflineMinutes int `json:"device_reboot_after_offline_minutes"`
 }
 
 // Timeout allows parsing golang-style durations (1h20m30s) OR seconds-as-float from/to json.

subsystems/provisioning/networkmanager.go

@@ -6,6 +6,7 @@ import (
 	"os"
 	"reflect"
 	"sort"
+	"syscall"
 	"time"
 
 	gnm "github.com/Otterverse/gonetworkmanager/v2"
@@ -698,6 +699,13 @@ func (w *Provisioning) mainLoop(ctx context.Context) {
 
 		if pMode {
 			// complex logic, so wasting some variables for readability
+			deviceRebootAfterOfflineDuration := time.Duration(w.cfg.DeviceRebootAfterOfflineMinutes) * time.Minute
+
+			if w.cfg.DeviceRebootAfterOfflineMinutes > 0 && now.After(lastOnline.Add(deviceRebootAfterOfflineDuration)) {
+				w.logger.Infof("device has been offline for more than %s minutes, rebooting", deviceRebootAfterOfflineDuration)
+				syscall.Sync()
+				syscall.Reboot(syscall.LINUX_REBOOT_CMD_RESTART)
+			}
 
 			// portal interaction time is updated when a user loads a page or makes a grpc request
 			inactivePortal := w.connState.getLastInteraction().Before(now.Add(time.Duration(w.cfg.UserTimeout)*-1)) || userInputReceived