Fix all linting errors found by cross-lint

Signed-off-by: Gunjan Vyas <vyasgun20@gmail.com>

cmd/win-sshproxy/main.go

@@ -100,12 +100,16 @@ func main() {
 	}
 
 	logrus.Debug("Setting up proxies")
-	setupProxies(ctx, group, sources, dests, identities)
+	err = setupProxies(ctx, group, sources, dests, identities)
+	if err != nil {
+		logrus.Errorf("Error setting up proxies: %v", err)
+		return
+	}
 
-	// Wait for cmopletion (cancellation) or error
+	// Wait for completion (cancellation) or error
 	if err := group.Wait(); err != nil {
-		logrus.Errorf("Error occured in execution group: " + err.Error())
+		logrus.Errorf("Error occurred in execution group: " + err.Error())
-		os.Exit(1)
+		return
 	}
 }
 

pkg/fs/umask_windows.go

@@ -1,3 +1,4 @@
+//go:build windows
 // +build windows
 
 package fs

pkg/sshclient/npipe_windows.go

@@ -30,7 +30,7 @@ func ListenNpipe(socketURI *url.URL) (net.Listener, error) {
 		InputBufferSize:    65536,
 		OutputBufferSize:   65536,
 	}
-	path := strings.Replace(socketURI.Path, "/", "\\", -1)
+	path := strings.ReplaceAll(socketURI.Path, "/", "\\")
 
 	listener, err := winio.ListenPipe(path, &config)
 	if err != nil {

test-win-sshproxy/basic_test.go

@@ -47,7 +47,9 @@ var _ = Describe("connectivity", func() {
 	It("proxies over a windows pipe", func() {
 		err := startProxy()
 		Expect(err).ShouldNot(HaveOccurred())
-		defer stopProxy(false)
+		defer func() {
+			Expect(stopProxy(false)).ShouldNot(HaveOccurred())
+		}()
 		httpClient := &http.Client{
 			Transport: &http.Transport{
 				DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
@@ -71,19 +73,18 @@ var _ = Describe("connectivity", func() {
 			g.Expect(string(reply)).To(Equal("pong"))
 
 		}).Should(Succeed())
-
-		err = stopProxy(true)
-		Expect(err).ShouldNot(HaveOccurred())
 	})
 
 	It("windows event logs were created", func() {
 		cmd := exec.Command("powershell", "-Command", "&{Get-WinEvent -ProviderName \".NET Runtime\" -MaxEvents 10 | Where-Object -Property Message -Match \"test:\"}")
 		reader, err := cmd.StdoutPipe()
 		Expect(err).ShouldNot(HaveOccurred())
-		cmd.Start()
+		err = cmd.Start()
+		Expect(err).ShouldNot(HaveOccurred())
 		output, err := io.ReadAll(reader)
 		Expect(err).ShouldNot(HaveOccurred())
-		cmd.Wait()
+		err = cmd.Wait()
+		Expect(err).ShouldNot(HaveOccurred())
 		Expect(strings.Contains(string(output), `[info ] test: Listening on: \\.\pipe\fake_docker_engine`)).Should(BeTrue())
 		Expect(strings.Contains(string(output), `[debug] test: Socket forward established`)).Should(BeTrue())
 	})

test-win-sshproxy/mock_sshserver.go

@@ -1,3 +1,4 @@
+//go:build windows
 // +build windows
 
 package e2e
@@ -42,7 +43,7 @@ func startMockServer() {
 	}
 	sshConfig.AddHostKey(key)
 
-	listener, err := net.Listen("tcp", ":2134")
+	listener, err := net.Listen("tcp", "localhost:2134")
 	if err != nil {
 		panic(err)
 	}
@@ -58,7 +59,7 @@ func startMockServer() {
 				break loop
 			default:
 				// proceed
-			} 
+			}
 			conn, err := listener.Accept()
 			if err != nil {
 				panic(err)
@@ -83,7 +84,7 @@ func stopMockServer() {
 }
 
 func handleRequests(reqs <-chan *ssh.Request) {
-	for _ = range reqs {
+	for range reqs {
 	}
 }
 
@@ -91,14 +92,20 @@ func handleChannels(chans <-chan ssh.NewChannel) {
 	directMsg := streamLocalDirect{}
 	for newChannel := range chans {
 		if t := newChannel.ChannelType(); t != "direct-streamlocal@openssh.com" {
-			newChannel.Reject(ssh.UnknownChannelType, fmt.Sprintf("unknown channel type: %s", t))
+			err := newChannel.Reject(ssh.UnknownChannelType, fmt.Sprintf("unknown channel type: %s", t))
+			if err != nil {
+				logrus.Errorf("could not reject channel: %s", err)
+			}
 			continue
 		}
 
 		if err := ssh.Unmarshal(newChannel.ExtraData(), &directMsg); err != nil {
 			logrus.Errorf("could not direct-streamlocal data: %s", err)
 
-			newChannel.Reject(ssh.Prohibited, "invalid format")
+			err = newChannel.Reject(ssh.Prohibited, "invalid format")
+			if err != nil {
+				logrus.Errorf("could not reject channel: %s", err)
+			}
 			return
 		}
 
@@ -124,7 +131,13 @@ func handleChannels(chans <-chan ssh.NewChannel) {
 			resp.StatusCode = 404
 			resp.ContentLength = 0
 		}
-		resp.Write(channel)
+		err = resp.Write(channel)
-		channel.CloseWrite()
+		if err != nil {
+			logrus.Errorf("could not write response: %s", err)
+		}
+		err = channel.CloseWrite()
+		if err != nil {
+			logrus.Errorf("could not close write: %s", err)
+		}
 	}
 }

test-win-sshproxy/suite_test.go

@@ -1,3 +1,4 @@
+//go:build windows
 // +build windows
 
 package e2e
@@ -14,6 +15,7 @@ import (
 
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
+	"github.com/sirupsen/logrus"
 )
 
 const (
@@ -64,14 +66,20 @@ func readTid() (uint32, uint32, error) {
 	}
 
 	var pid, tid uint32
-	fmt.Sscanf(string(contents), "%d:%d", &pid, &tid)
+	_, err = fmt.Sscanf(string(contents), "%d:%d", &pid, &tid)
+	if err != nil {
+		return 0, 0, err
+	}
 	return pid, tid, nil
 }
 
 func sendQuit(tid uint32) {
 	user32 := syscall.NewLazyDLL("user32.dll")
 	postMessage := user32.NewProc("PostThreadMessageW")
-	postMessage.Call(uintptr(tid), WM_QUIT, 0, 0)
+	_, _, err := postMessage.Call(uintptr(tid), WM_QUIT, 0, 0)
+	if err != nil {
+		logrus.Errorf("Error posting quit message: %v", err)
+	}
 }
 
 func stopProxy(noKill bool) error {