Add TOYBOX_PEDANTIC_ARGS to check arguments when there are no arguments,

and make uptime use it.

Config.in

@@ -135,6 +135,12 @@ config TOYBOX_DEBUG
 	  Enable extra checks for debugging purposes. All of them catch
 	  things that can only go wrong at development time, not runtime.
 
+config TOYBOX_PEDANTIC_ARGS
+	bool "Pedantic argument checking"
+	default n
+	help
+	  Check arguments for commands that have no arguments.
+
 config TOYBOX_UID_SYS
 	int "First system UID"
 	default 100

lib/toyflags.h

@@ -28,3 +28,9 @@
 
 // Suppress default --help processing
 #define TOYFLAG_NOHELP   (1<<9)
+
+#if CFG_TOYBOX_PEDANTIC_ARGS
+#define NO_ARGS ">0"
+#else
+#define NO_ARGS 0
+#endif

scripts/make.sh

@@ -182,6 +182,7 @@ make_flagsh()
     else
       $SED '/USE_.*([^)]*)$/s/$/ __VA_ARGS__/' generated/config.h
     fi
+    echo '#include "lib/toyflags.h"'
     cat generated/newtoys.h
 
     # Run result through preprocessor, glue together " " gaps leftover from USE

toys/other/uptime.c

@@ -5,7 +5,7 @@
  * Copyright 2013 Jeroen van Rijn <jvrnix@gmail.com>
 
 
-USE_UPTIME(NEWTOY(uptime, NULL, TOYFLAG_USR|TOYFLAG_BIN))
+USE_UPTIME(NEWTOY(uptime, NO_ARGS, TOYFLAG_USR|TOYFLAG_BIN))
 
 config UPTIME
   bool "uptime"