Fix for #42 and #62, adding iwlist for when iw is not available

main.go

@@ -46,6 +46,7 @@ var format2 = logging.MustStringFormatter(
 
 var verbose = true
 var errorsInARow = 0
+var hasIw = true
 
 func getInput(prompt string) string {
 	reader := bufio.NewReader(os.Stdin)
@@ -175,6 +176,16 @@ func main() {
 	}
 	app.Run(os.Args)
 
+	// Check, if linux, if user has iw or iwlist
+	if runtime.GOOS == "linux" {
+		command := "/sbin/iw dev wlan0 scan -u"
+		out, _ := exec.Command(strings.Split(command, " ")[0], strings.Split(command, " ")[1:]...).Output()
+		if strings.Contains(string(out), "not found") {
+			hasIw = false
+			log.Notice("/sbin/iw not found, defaulting to /sbin/iwlist")
+		}
+	}
+
 	// Print the current parameters
 	log.Notice("You can see fewer messages by adding --nodebug")
 	log.Notice("User: " + f.Username)

os_configuration.go

@@ -47,10 +47,18 @@ func populateConfigurations(wlanInterface string) {
 		ScanConfig:      ScanParsingConfig{darwinFindMac, darwinFindRssi},
 	}
 
-	linuxCommand := "/sbin/iw dev " + wlanInterface + " scan -u"
-	osConfigurations["linux"] = OSConfig{
-		WifiScanCommand: linuxCommand,
-		ScanConfig:      ScanParsingConfig{linuxFindMac, linuxFindRssi},
+	if hasIw {
+		linuxCommand := "/sbin/iw dev " + wlanInterface + " scan -u"
+		osConfigurations["linux"] = OSConfig{
+			WifiScanCommand: linuxCommand,
+			ScanConfig:      ScanParsingConfig{linuxFindMac, linuxFindRssi},
+		}
+	} else {
+		linuxCommand := "/sbin/iwlist " + wlanInterface + " scan"
+		osConfigurations["linux"] = OSConfig{
+			WifiScanCommand: linuxCommand,
+			ScanConfig:      ScanParsingConfig{linuxFindMac, linuxFindRssiIwList},
+		}
 	}
 
 	osConfigurations["windows"] = OSConfig{