qemu: enable control mode to monitor socket

Author: olljanat

drivers/qemu/driver.go

@@ -44,8 +44,8 @@ const (
 	// Represents an ACPI shutdown request to the VM (emulates pressing a physical power button)
 	// Reference: https://en.wikibooks.org/wiki/QEMU/Monitor
 	// Use a short file name since socket paths have a maximum length.
-	qemuGracefulShutdownMsg = "system_powerdown\n"
-	qemuQmpCapabilitiesMsg  = "qmp_capabilities\n"
+	qemuGracefulShutdownMsg = `{"execute": "system_powerdown"}`
+	qemuQmpCapabilitiesMsg  = `{"execute":"qmp_capabilities"}`
 	qemuMonitorSocketName   = "qm.sock"
 
 	// Socket file enabling communication with the Qemu Guest Agent (if enabled and running)
@@ -505,7 +505,7 @@ func (d *Driver) StartTask(cfg *drivers.TaskConfig) (*drivers.TaskHandle, *drive
 			return nil, nil, err
 		}
 		d.logger.Debug("got monitor path", "monitorPath", monitorPath)
-		args = append(args, "-monitor", fmt.Sprintf("unix:%s,server,nowait", monitorPath))
+		args = append(args, "-qmp", fmt.Sprintf("unix:%s,server=on,wait=off", monitorPath))
 	}
 
 	if driverConfig.GuestAgent {