diff -urN cui84/Makefile cui85/Makefile
--- cui84/Makefile	Thu Mar 27 01:00:00 2014
+++ cui85/Makefile	Sun Mar 30 22:00:00 2014
@@ -1,7 +1,7 @@
 CC = gcc -Wall
 
 TARG = cui_test
-OBJS = cui.o focus.o etext.o menu.o dialog.o timer.o term.o scpanel.o tbar.o rszbox.o scbar.o fillbtn.o tab.o radio.o ckbox.o button.o lblfix.o fill.o label.o panel.o handler.o esc.o key.o rect.o
+OBJS = cui.o focus.o etext.o menu.o dialog.o timer.o term.o scpanel.o tbar.o rszbox.o scbar.o fillbtn.o tab.o radio.o ckbox.o button.o lblfix.o fill.o label.o panel.o handler.o esc.o key.o rect.o dbg.o
 
 all: $(TARG)
 
diff -urN cui84/cui.h cui85/cui.h
--- cui84/cui.h	Thu Mar 27 23:00:00 2014
+++ cui85/cui.h	Sun Mar 30 22:00:00 2014
@@ -7,6 +7,8 @@
 
 typedef struct cui_base *cui;
 
+#include "dbg.h"
+
 #define MSG(s) fprintf(stderr, "%s() %s L%d : %s\n", __func__, __FILE__, __LINE__, s)
 #define ERR(s) do{ fprintf(stderr, "ERR "); MSG(s); exit(1); }while(0)
 
diff -urN cui84/cui_test.c cui85/cui_test.c
--- cui84/cui_test.c	Fri Mar 28 03:00:00 2014
+++ cui85/cui_test.c	Sun Mar 30 22:00:00 2014
@@ -409,8 +409,9 @@
 }
 
 int
-main()
+main(int ac, char **av)
 {
+	int dbg_ret = cui_dbg_open(ac, av);
 	cui bs = cui_scpanel_new(NULL, 0, 0, 42, 23, "cui_test");
 	cui bs_bar = cui_base_new(bs, 1, 2, 0, 0);
 	cui lb_bar = cui_label_new(bs_bar, 1, 1, "bar");
@@ -442,6 +443,8 @@
 
 	char lb_timer1_buf[16];
 
+	cui_dbg_open(ac, av);
+
 	big_new(small2, 0, 0, &p);
 	cui_wh_fit(small2);
 
@@ -485,6 +488,7 @@
 	cui_main(bs, NULL);
 	printf("result %s\n", p->btn_result);
 	cui_free(bs);
+	if(dbg_ret == 0) cui_dbg_close();
 	return 0;
 }
 
diff -urN cui84/dbg.c cui85/dbg.c
--- cui84/dbg.c	Thu Jan  1 09:00:00 1970
+++ cui85/dbg.c	Sun Mar 30 22:00:00 2014
@@ -0,0 +1,43 @@
+#include "dbg.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+
+static FILE *fp = NULL;
+
+int
+cui_dbg_open(int ac, char **av)
+{
+	char buf[1024];	
+	int i;
+	char *nc_opt = "localhost 12345";
+
+	for(i=1; i<ac; i++) if(strcmp(av[i], "-dbg") == 0) break;
+	if(i >= ac) return 0;
+
+	if(i+1 < ac) nc_opt = av[i+1];
+	sprintf(buf, "nc %s", nc_opt);
+	if((fp = popen(buf, "w")) == NULL) return -1;
+	return 0;
+}
+
+void
+cui_dbg_close(void)
+{
+	if(fp) pclose(fp);
+}
+
+void
+cui_dbg(char *fmt, ...)
+{
+	va_list ap;
+
+	if(!fp) return;
+	va_start(ap, fmt);
+	vfprintf(fp, fmt, ap);
+	fflush(fp);
+	va_end(ap);
+}
+
+/* EOF */
diff -urN cui84/dbg.h cui85/dbg.h
--- cui84/dbg.h	Thu Jan  1 09:00:00 1970
+++ cui85/dbg.h	Sun Mar 30 22:00:00 2014
@@ -0,0 +1,8 @@
+#ifndef __DBG_H__
+#define __DBG_H__
+
+int cui_dbg_open(int ac, char **av);
+void cui_dbg_close(void);
+void cui_dbg(char *fmt, ...);
+
+#endif
diff -urN cui84/term.c cui85/term.c
--- cui84/term.c	Fri Mar 28 03:00:00 2014
+++ cui85/term.c	Sun Mar 30 22:00:00 2014
@@ -395,6 +395,7 @@
 	if(pipe(pipe_from_sh) < 0) ERR("pipe");
 	if((ret = fork()) < 0) ERR("fork");
 	if(ret == 0){ /* child */
+		setsid();
 		close(pipe_to_sh[1]);
 		close(pipe_from_sh[0]);
 		dup2(pipe_to_sh[0] ,0);
@@ -427,6 +428,7 @@
 	cui_terminal p = (cui_terminal)obj;
 	int evts;
 
+	cui_dbg("cui_terminal_init\n");
 	cui_base_init(obj, parent, x, y, w, h);
 	obj->flags |= CUI_FLG_CAN_FOCUS;
 
@@ -438,6 +440,7 @@
 	p->rszbox = cui_rszbox_new(obj);
 
 	boot_sh(obj);
+	cui_dbg("pipr_r=%d , pipe_w=%d\n", p->pipe_r, p->pipe_w);
 
 	evts = CUI_EVT_DRAW|CUI_EVT_KEY|CUI_EVT_RESIZE|CUI_EVT_TIMER|CUI_EVT_READABLE;
 	cui_bind(obj, evts, cui_terminal_hdr, NULL);