govarnishadm uses the vsm package separately.

To get the management address and secret file path, if necessary.

cmd/govarnishadm/govarnishadm.go

@@ -30,6 +30,7 @@ package main
 
 import (
 	"code.uplex.de/uplex-varnish/varnishapi/pkg/admin"
+	"code.uplex.de/uplex-varnish/varnishapi/pkg/vsm"
 
 	"bufio"
 	"flag"
@@ -55,15 +56,38 @@ func errExit(err error) {
 
 func main() {
 	var adm *admin.Admin
-	var admErr error
 
 	flag.Parse()
 
 	tmo := time.Duration(*timeout * uint(time.Second))
 
 	if *tflag == "" || *sflag == "" {
-		adm, admErr = admin.Attach(*instance, tmo)
-	} else {
+		vsm := vsm.New()
+		if vsm == nil {
+			fmt.Println("Cannot initiate attachment to Varnish "+
+				"shared memory")
+			os.Exit(-1)
+		}
+		defer vsm.Destroy()
+		if err := vsm.Attach(*instance); err != nil {
+			errExit(err)
+		}
+		if *tflag == "" {
+			addr, err := vsm.GetMgmtAddr()
+			if err != nil {
+				errExit(err)
+			}
+			*tflag = addr
+		}
+		if *sflag == "" {
+			sarg, err := vsm.GetSecretPath()
+			if err != nil {
+				errExit(err)
+			}
+			*sflag = sarg
+		}
+	}
+
 	sfile, err := os.Open(*sflag)
 	if err != nil {
 		errExit(err)
@@ -72,10 +96,9 @@ func main() {
 	if err != nil {
 		errExit(err)
 	}
-		adm, admErr = admin.Dial(*tflag, secret, tmo)
-	}
-	if admErr != nil {
-		errExit(admErr)
+	adm, err = admin.Dial(*tflag, secret, tmo)
+	if err != nil {
+		errExit(err)
 	}
 
 	if len(flag.Args()) > 0 {