diff --git a/c4mate b/c4mate
index 7a84755..7c746f7 100755
--- a/c4mate
+++ b/c4mate
@@ -136,8 +136,7 @@ sed -n '
     T fail
     b
     :fail
-    q 1
-']=], self.CURL_FLAGS, self.HOST, url_encode(self.USER), datefile))
+    q 1 ']=], self.CURL_FLAGS, self.HOST, url_encode(self.USER), datefile))
 
     while true do
         local entry = {}
@@ -242,8 +241,7 @@ sed -n --sandbox '
     T fail
     b
     :fail
-    q 1
-']=], self.CURL_FLAGS, self.HOST))
+    q 1 ']=], self.CURL_FLAGS, self.HOST))
 
     while true do
         local item = {}
@@ -311,10 +309,11 @@ Add or subtract credits:
     c4mate <difference>
 Give credits:
     c4mate -g <amount> <user> [<reason>]]=])
-    return
+    os.exit(0)
+end
 
--- Parse -u flag.
-elseif arg[1] == "-u" then
+-- Parse -u flag (which may be given multiple times).
+while arg[1] == "-u" do
     table.remove(arg, 1)
     USER = arg[1]
     table.remove(arg, 1)