util: Add CheckIfRoot

Replace IsUserRoot with CheckIfRoot. This allows all functions to use
the same error handling when a user is not root.

1 files changed, 8 insertions, 0 deletions

diff --git a/util/users.go b/util/users.go
index 92affa8..49abd32 100644
--- a/util/users.go
+++ b/util/users.go
@@ -48,3 +48,11 @@ func GetUser(uid int) *user.User {
 func CurrentUser() *user.User {
 	return GetUser(CurrentUserID())
 }
+
+// CheckIfRoot returns ErrNotRoot if the current user is not the root user.
+func CheckIfRoot() error {
+	if id := CurrentUserID(); id != 0 {
+		return ErrNotRoot
+	}
+	return nil
+}