From 9c18e832ceaedba4bce028703887955797f6c7d4 Mon Sep 17 00:00:00 2001
From: Cristian Maglie <c.maglie@bug.st>
Date: Thu, 1 Jan 2015 17:46:14 +0100
Subject: [PATCH] Fixed unchecked array access

---
 serial_unix.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/serial_unix.go b/serial_unix.go
index 98f8c71..edb1fac 100644
--- a/serial_unix.go
+++ b/serial_unix.go
@@ -10,6 +10,7 @@ package serial // import "go.bug.st/serial"
 
 import "io/ioutil"
 import "regexp"
+import "strings"
 import "syscall"
 import "unsafe"
 
@@ -116,7 +117,7 @@ func GetPortsList() ([]string, error) {
 		portName := devFolder + "/" + f.Name()
 
 		// Check if serial port is real or is a placeholder serial port "ttySxx"
-		if f.Name()[:4] == "ttyS" {
+		if strings.HasPrefix(f.Name(), "ttyS") {
 			port, err := OpenPort(portName, &Mode{})
 			if err != nil {
 				serr, ok := err.(*SerialPortError)