@@ -8,6 +8,7 @@ import (

 	"sort"

 	"strconv"

 	"strings"

+	"sync"

 )

 // add a user and/or group to Linux /etc/passwd, /etc/group using standard

@@ -16,6 +17,7 @@ import (

 // useradd -r -s /bin/false <username>

 var (

+	once        sync.Once

 	userCommand string

 	cmdTemplates = map[string]string{

@@ -31,15 +33,6 @@ var (

 	userMod           = "usermod"

 )

-func init() {

-	// set up which commands are used for adding users/groups dependent on distro

-	if _, err := resolveBinary("adduser"); err == nil {

-		userCommand = "adduser"

-	} else if _, err := resolveBinary("useradd"); err == nil {

-		userCommand = "useradd"

-	}

-}

-

 func resolveBinary(binname string) (string, error) {

 	binaryPath, err := exec.LookPath(binname)

 	if err != nil {

@@ -94,7 +87,14 @@ func AddNamespaceRangesUser(name string) (int, int, error) {

 }

 func addUser(userName string) error {

-

+	once.Do(func() {

+		// set up which commands are used for adding users/groups dependent on distro

+		if _, err := resolveBinary("adduser"); err == nil {

+			userCommand = "adduser"

+		} else if _, err := resolveBinary("useradd"); err == nil {

+			userCommand = "useradd"

+		}

+	})

 	if userCommand == "" {

 		return fmt.Errorf("Cannot add user; no useradd/adduser binary found")

 	}