Fix golangci-lint issues

agentx/agentx_test.go

@@ -41,6 +41,7 @@ func TestFlagRegistration(t *testing.T) {
 	f := flag.Lookup("agentx.addr")
 	if f == nil {
 		t.Error("Expected agentx.addr flag to be registered")
+		return
 	}
 	
 	if f.DefValue != "localhost:705" {

ifmib/ifmib.go

@@ -4,7 +4,7 @@ package ifmib
 
 import (
 	"fmt"
-	"io/ioutil"
+	"os"
 	"sync"
 	"time"
 
@@ -102,7 +102,7 @@ func (m *InterfaceMIB) LoadVPPConfig(configPath string) error {
 	defer m.mutex.Unlock()
 
 	// Read YAML file
-	data, err := ioutil.ReadFile(configPath)
+	data, err := os.ReadFile(configPath)
 	if err != nil {
 		return fmt.Errorf("failed to read VPP config file: %v", err)
 	}

logger/logger_test.go

@@ -26,7 +26,7 @@ func TestPrintf(t *testing.T) {
 
 	// Read captured output
 	var buf bytes.Buffer
-	io.Copy(&buf, r)
+	_, _ = io.Copy(&buf, r)
 	output := buf.String()
 
 	// Check output format: "INFO file.go:function message"
@@ -64,7 +64,7 @@ func TestDebugfWithDebugEnabled(t *testing.T) {
 
 	// Read captured output
 	var buf bytes.Buffer
-	io.Copy(&buf, r)
+	_, _ = io.Copy(&buf, r)
 	output := buf.String()
 
 	// Check output format: "DEBUG file.go:function message"
@@ -98,7 +98,7 @@ func TestDebugfWithDebugDisabled(t *testing.T) {
 
 	// Read captured output
 	var buf bytes.Buffer
-	io.Copy(&buf, r)
+	_, _ = io.Copy(&buf, r)
 	output := buf.String()
 
 	// Should be empty when debug is disabled

vppstats/stats.go

@@ -142,10 +142,7 @@ func statsRoutine(period time.Duration, callback StatsCallback) {
 		}
 
 		// Wait for next tick
-		select {
-		case <-ticker.C:
-			continue
-		}
+		<-ticker.C
 	}
 }