added some sync calls to store settings more reliably on power loss

main/gen_gdl90.go

@@ -1316,6 +1316,7 @@ func saveSettings() {
 	defer fd.Close()
 	jsonSettings, _ := json.Marshal(&globalSettings)
 	fd.Write(jsonSettings)
+	fd.Sync()
 	log.Printf("wrote settings.\n")
 }
 
@@ -1369,6 +1370,7 @@ func saveWiFiUserSettings() {
 		fmt.Fprintf(writer, "wpa_passphrase=%s\n", globalSettings.WiFiPassphrase)
 	}
 	writer.Flush()
+	fd.Sync()
 }
 
 func openReplay(fn string, compressed bool) (WriteCloser, error) {

main/networksettings.go

@@ -146,4 +146,5 @@ func writeTemplate(tplFile string, outFile string, settings NetworkTemplateParam
 		log.Printf("Network Settings: Unable to execute template substitution %s: %s", outFile, err)
 		return
 	}
+	outputFile.Sync()
 }