Start of peercred package, with Linux only for now.

peercred_unix_test.go

@@ -0,0 +1,62 @@
+// Copyright (c) 2021 AUTHORS All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build go1.15
+// +build linux
+
+package peercred // import "inet.af/peercred"
+
+import (
+	"fmt"
+	"net"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestUnix(t *testing.T) {
+	d := t.TempDir()
+	path := filepath.Join(d, "foo.sock")
+	sock, err := net.Listen("unix", path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer sock.Close()
+
+	go func() {
+		c, err := net.Dial("unix", path)
+		if err != nil {
+			t.Error(err)
+			return
+		}
+		c.Close()
+	}()
+
+	c, err := sock.Accept()
+	if err != nil {
+		t.Fatalf("Accept: %v", err)
+	}
+	defer c.Close()
+
+	creds, err := Get(c)
+	if err != nil {
+		t.Fatalf("Get: %v", err)
+	}
+
+	uid, ok := creds.UserID()
+	if !ok {
+		t.Errorf("no UID")
+	}
+	if got, want := uid, fmt.Sprint(os.Getuid()); got != want {
+		t.Errorf("UID = %q; want %q", got, want)
+	}
+	pid, ok := creds.PID()
+	if !ok {
+		t.Errorf("no PID")
+	}
+	if got, want := pid, os.Getpid(); got != want {
+		t.Errorf("PID = %v; want %v", got, want)
+	}
+
+}