This patch, put together by Manuel Novoa III, is a merge of work
done by Evin Robertson (bug#1105) and work from Manuel to make
usage messages occupy less space and simplify how usage messages
are displayed.
diff --git a/whoami.c b/whoami.c
index 398e373..54df0bf 100644
--- a/whoami.c
+++ b/whoami.c
@@ -31,7 +31,7 @@
 	uid_t uid = geteuid();
 
 	if (argc > 1)
-		usage(whoami_usage);
+		show_usage();
 
 	my_getpwuid(user, uid);
 	if (*user) {