Correct root check

Fix a bug where the username was not being sourced correctly.  The
'USER' environment variable is not set in sysVinit scripts.

1 files changed, 1 insertions, 1 deletions

diff --git a/efi-sync b/efi-sync
index 02ab587..585b59f 100644
--- a/efi-sync
+++ b/efi-sync
@@ -43,7 +43,7 @@ require_efi () {
 }
 
 require_root () {
-  if [[ $USER != "root" ]]; then
+  if [[ "$(id --user --name)" != "root" ]]; then
     log "command must be run as root"
     exit 1
   fi