diff --git a/bin/qemush b/bin/qemush
index cd360c1..754eee4 100755
--- a/bin/qemush
+++ b/bin/qemush
@@ -1,10 +1,18 @@
 #!/bin/bash
 
-if [ "$(whoami)" != root ]; then
-    exec sudo -u qemu "$0" "$@"
-else
-    cd || exit
-fi
+exec_as() {
+    local user
+    user="$1"
+    shift
+
+    if [ "$(whoami)" != "$user" ]; then
+        exec sudo -u "$user" "$0" "$@"
+    else
+        cd || exit
+    fi
+}
+
+exec_as qemu "$@"
 
 bin=bin
 images=images