patch to allow the configuration of the instance name of xtmux window on the command line

res_name.diff

diff --git a/tmux.c b/tmux.c
index 5d82ff5..3331f67 100644
--- a/tmux.c
+++ b/tmux.c
@@ -52,6 +52,7 @@ pid_t		 environ_pid = -1;
 int		 environ_idx = -1;
 #ifdef XTMUX
 char		*xdisplay = NULL;
+char		*res_name = NULL;
 #endif
 
 __dead void	 usage(void);
@@ -66,7 +67,11 @@ __dead void
 usage(void)
 {
 	fprintf(stderr,
+#ifdef XTMUX
+	    "usage: %s [-28lquvVx] [-n name] [-c shell-command] [-f file] [-L socket-name]\n"
+#else
 	    "usage: %s [-28lquvV] [-c shell-command] [-f file] [-L socket-name]\n"
+#endif
 	    "            [-S socket-path] [command [flags]]\n",
 	    __progname);
 	exit(1);
@@ -257,7 +262,7 @@ main(int argc, char **argv)
 	login_shell = (**argv == '-');
 	while ((opt = getopt(argc, argv, "28c:df:lL:qS:uUvV"
 #ifdef XTMUX
-					"x"
+					"n:x"
 #endif
 					)) != -1) {
 		switch (opt) {
@@ -310,6 +315,11 @@ main(int argc, char **argv)
 				optarg = getenv("DISPLAY");
 			xdisplay = xstrdup(optarg);
 			break;
+		case 'n':
+			if (!optarg)
+				usage();
+			res_name = xstrdup(optarg);
+			break;
 #endif
 		default:
 			usage();
diff --git a/tmux.h b/tmux.h
index e419c36..c365af1 100644
--- a/tmux.h
+++ b/tmux.h
@@ -1371,6 +1371,7 @@ extern pid_t	 environ_pid;
 extern int	 environ_idx;
 #ifdef XTMUX
 extern char	*xdisplay;
+extern char	*res_name;
 #endif
 void		 logfile(const char *);
 const char	*getshell(void);
diff --git a/xtmux.c b/xtmux.c
index 062d068..c524298 100644
--- a/xtmux.c
+++ b/xtmux.c
@@ -836,7 +836,9 @@ xtmux_open(struct tty *tty, char **cause)
 	wm_hints.input = True;
 	wm_hints.initial_state = NormalState;
 	wm_hints.flags = InputHint | StateHint;
-	class_hints.res_name = (char *)"xtmux";
+	if (!res_name)
+		res_name = (char *)"xtmux";
+	class_hints.res_name = xstrdup(res_name);
 	class_hints.res_class = (char *)"Xtmux";
 	Xutf8SetWMProperties(x->display, x->window, "xtmux", "xtmux", NULL, 0, &size_hints, &wm_hints, &class_hints);