From 43440ff00c7b77ec2af8195cc922a9c15abdcdde Mon Sep 17 00:00:00 2001
From: Wolfy-J <wolfy.jd@gmail.com>
Date: Mon, 23 Dec 2019 15:08:46 +0300
Subject: - check before erasing unix sock

---
 util/network.go | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

(limited to 'util')

diff --git a/util/network.go b/util/network.go
index 3f533023..b9066de7 100644
--- a/util/network.go
+++ b/util/network.go
@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"net"
+	"os"
 	"strings"
 	"syscall"
 )
@@ -19,7 +20,7 @@ func CreateListener(address string) (net.Listener, error) {
 		return nil, errors.New("invalid Protocol (tcp://:6001, unix://file.sock)")
 	}
 
-	if dsn[0] == "unix" {
+	if dsn[0] == "unix" && fileExists(dsn[1]) {
 		err := syscall.Unlink(dsn[1])
 		if err != nil {
 			return nil, fmt.Errorf("error during the unlink syscall: error %v", err)
@@ -28,3 +29,13 @@ func CreateListener(address string) (net.Listener, error) {
 
 	return net.Listen(dsn[0], dsn[1])
 }
+
+// fileExists checks if a file exists and is not a directory before we
+// try using it to prevent further errors.
+func fileExists(filename string) bool {
+	info, err := os.Stat(filename)
+	if os.IsNotExist(err) {
+		return false
+	}
+	return !info.IsDir()
+}
-- 
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