Merge pull request #10416 from tych0/activation-drop-FDNAMES

pkg/systemd: don't require LISTEN_FDNAMES for socket activation

pkg/systemd/activation.go

@@ -25,11 +25,5 @@ func SocketActivated() bool {
 	if err != nil || nfds == 0 {
 		return false
 	}
-
-	// "github.com/coreos/go-systemd/v22/activation" will use and validate this variable's
-	// value. We're just providing a fast fail
-	if _, found = os.LookupEnv("LISTEN_FDNAMES"); !found {
-		return false
-	}
 	return true
 }

pkg/systemd/activation_test.go

@@ -0,0 +1,32 @@
+package systemd
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestSocketActivated(t *testing.T) {
+	assert := assert.New(t)
+
+	assert.False(SocketActivated())
+
+	// different pid
+	assert.NoError(os.Setenv("LISTEN_PID", "1"))
+	assert.False(SocketActivated())
+
+	// same pid no fds
+	assert.NoError(os.Setenv("LISTEN_PID", fmt.Sprintf("%d", os.Getpid())))
+	assert.NoError(os.Setenv("LISTEN_FDS", "0"))
+	assert.False(SocketActivated())
+
+	// same pid some fds
+	assert.NoError(os.Setenv("LISTEN_FDS", "1"))
+	assert.True(SocketActivated())
+
+	// FDNAME is ok too (but not required)
+	assert.NoError(os.Setenv("LISTEN_FDNAMES", "/meshuggah/rocks"))
+	assert.True(SocketActivated())
+}