diff -urN cui81/cui.c cui82/cui.c
--- cui81/cui.c	Thu Mar 27 22:00:00 2014
+++ cui82/cui.c	Thu Mar 27 22:10:00 2014
@@ -12,6 +12,8 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <sys/time.h>
+#include <termios.h>
 
 typedef struct cui_main_stack *cui_main_stack;
 
@@ -405,6 +407,47 @@
 	cui_running_set(FALSE);
 }
 
+#define KEY_FD	0
+
+static fd_set sel_rfs, res_rfs;
+
+static void
+cui_select_init(void)
+{
+	FD_ZERO(&sel_rfs);
+}
+
+static void
+cui_select_add(int fd)
+{
+	FD_SET(fd, &sel_rfs);
+}
+
+static void
+cui_select_del(int fd)
+{
+	FD_CLR(fd, &sel_rfs);
+}
+
+static int
+cui_select(void)
+{
+	int nfds = 1, fd;
+	struct timeval tm;
+
+	res_rfs = sel_rfs;
+	for(fd=0; fd<FD_SETSIZE; fd++) if(FD_ISSET(fd, &res_rfs)) nfds++;
+	tm.tv_sec = 0;
+	tm.tv_usec = 100*1000;
+	return select(nfds, &res_rfs, NULL, NULL, &tm);
+}
+
+static int
+cui_select_chk(int fd)
+{
+	return FD_ISSET(fd, &res_rfs);
+}
+
 void
 cui_main(cui top_obj, cui init_focus)
 {
@@ -424,8 +467,17 @@
 
 	cui_clear(top_obj);
 	cui_draw(top_obj);
+
+	cui_select_init();
+	cui_select_add(KEY_FD);
+
 	while(cui_running_get()){
 		cui_timer_work();
+		if(cui_select() <= 0) continue;
+
+		// ...
+
+		if(!cui_select_chk(KEY_FD)) continue;
 		if((key = cui_key_get2()) == 0) continue;
 		focus = cui_focus_get();
 		if(focus){
diff -urN cui81/key.c cui82/key.c
--- cui81/key.c	Fri Jan 31 01:10:00 2014
+++ cui82/key.c	Thu Mar 27 22:10:00 2014
@@ -4,7 +4,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
-#include <sys/time.h>
 #include <termios.h>
 
 #define KEY_FD	0
@@ -34,17 +33,7 @@
 int
 cui_key_get(void)
 {
-	fd_set rfs;
-	struct timeval tm;
-	int ret;
 	unsigned char uc;
-
-	FD_ZERO(&rfs);
-	FD_SET(KEY_FD, &rfs);
-	tm.tv_sec = 0;
-	tm.tv_usec = 100*1000;
-	ret = select(KEY_FD+1, &rfs, NULL, NULL, &tm);
-	if(ret <= 0) return 0;
 
 	if(read(KEY_FD, &uc, 1) != 1) return 0;
 	return uc;