[MiNT] Patch: add commandline option "--force" to gluestik

[Ole <ole@monochrom.net>]

Hello,

this patch adds support for command line options to gluestik.
Currently there is only one option parsed:

--force / -f

this is handled within install_cookie() and deletes any existing Stik 
cookie,
before trying to install the own StiK cookie.

This behavior is required by ColdFire FreeMiNT because the StiK Cookie 
is always set by FireTOS before running MiNT.

Please commit or comment,
thanks.

Greets,
Ole

--- freemint_orig/tools/gluestik/main.c	2012-08-06 23:00:57.000000000 +0200
+++ freemint/tools/gluestik/main.c	2012-08-06 22:58:25.000000000 +0200
@@ -34,7 +34,8 @@
 # include <signal.h>
 # include <unistd.h>
 # include <netdb.h>
-
+# include <stdbool.h>
+# include <string.h>
 
 # include "gs.h"
 
@@ -69,7 +70,7 @@
 # define MSG_FAILURE	\
 	"\7Sorry, driver NOT installed - initialization failed!\r\n\r\n"
 
-
+static bool opt_force_install = false;
 
 int (*init_funcs [])(void) =
 {
@@ -96,6 +97,18 @@
 		(*cleanup_funcs [i])();
 }
 
+/* ------------------
+   | Remove cookie |
+   ------------------ */
+static void
+uninstall_cookie (void)
+{
+# ifndef S_DELCOOKIE
+# define S_DELCOOKIE	26
+# endif
+
+	Ssystem(S_DELCOOKIE, C_STiK, 0L);
+}
 
 /* ------------------
    | Install cookie |
@@ -110,7 +123,10 @@
 		Cconws (MSG_MINT);
 		return 1;
 	}
-	
+
+	if (opt_force_install == true) {
+		uninstall_cookie();
+	}
 	if (Ssystem (S_GETCOOKIE, C_STiK, &dummy) == 0)
 	{
 		Cconws (MSG_ALREADY);
@@ -125,19 +141,6 @@
 	return 0;
 }
 
-/* ------------------
-   | Remove cookie |
-   ------------------ */
-static void
-uninstall_cookie (void)
-{
-# ifndef S_DELCOOKIE
-# define S_DELCOOKIE	26
-# endif
-
-	Ssystem(S_DELCOOKIE, C_STiK, 0L);
-}
-
 
 static void
 nothing (long sig)
@@ -156,13 +159,31 @@
 	exit (0);
 }
 
+
+/* ------------------
+   | Remove cookie |
+   ------------------ */
+static void 
+parse_cmdline(int argc, char *argv[])
+{
+	int i;
+
+	for (i = 1; i < argc; i++)
+        {
+        	if (!strncmp(argv[i], "--force", 7) || !strncmp(argv[i], "-f", 2))
+			opt_force_install = true; 
+	}
+}
+
 int
-main (void)
+main (int argc, char *argv[])
 {
 	if (fork () == 0)
 	{
 		int i;
-		
+
+		parse_cmdline(argc, argv);
+
 		Cconws (MSG_BOOT);
 		Cconws (MSG_GREET);
 # ifdef ALPHA