--- lbbs/src/screen.c	2025/05/10 14:37:04	1.43
+++ lbbs/src/screen.c	2025/05/13 07:28:51	1.47
@@ -98,7 +98,7 @@ void set_input_echo(int echo)
 		prints("\xff\xfb\x01\xff\xfb\x03");
 		iflush();
 		igetch(0);
-		igetch(1);
+		igetch_reset();
 	}
 }
 
@@ -112,18 +112,20 @@ static int _str_input(char *buffer, int
 	for (offset = 0; offset < buf_size - 1 && buffer[offset] != '\0'; offset++)
 		;
 
-	while ((c = igetch_t(MIN(MAX_DELAY_TIME, 60))))
+	igetch_reset();
+
+	while (!SYS_server_exit && (c = igetch_t(MIN(MAX_DELAY_TIME, 60))))
 	{
 		if (c == CR)
 		{
-			igetch(1); // Cleanup remaining '\n' in the buffer
+			igetch_reset();
 			break;
 		}
-		else if (c == KEY_TIMEOUT)
+		else if (c == KEY_TIMEOUT || c == KEY_NULL) // timeout or broken pipe
 		{
 			return -1;
 		}
-		else if (c == KEY_NULL || c == LF)
+		else if (c == LF || c == '\0')
 		{
 			continue;
 		}
@@ -156,7 +158,7 @@ static int _str_input(char *buffer, int
 		{
 			if (!hz && offset + 2 > buf_size - 1) // No enough space for Chinese character
 			{
-				igetch(1); // Cleanup remaining input
+				igetch_reset();
 				outc('\a');
 				iflush();
 				continue;
@@ -210,8 +212,6 @@ int get_data(int row, int col, char *pro
 {
 	int len;
 
-	igetch(1); // Cleanup input buffer
-
 	moveto(row, col);
 	prints(prompt);
 	prints(buffer);
@@ -278,7 +278,7 @@ int display_file_ex(const char *filename
 	line = begin_line;
 	max_lines = screen_rows - 1;
 
-	while (loop)
+	while (!SYS_server_exit && loop)
 	{
 		if (c_line_current >= c_line_total && c_line_total <= screen_rows - 2)
 		{
@@ -313,12 +313,13 @@ int display_file_ex(const char *filename
 			iflush();
 
 			input_ok = 0;
-			while (!input_ok)
+			while (!SYS_server_exit && !input_ok)
 			{
 				ch = igetch_t(MAX_DELAY_TIME);
 				input_ok = 1;
 				switch (ch)
 				{
+				case KEY_NULL:
 				case KEY_TIMEOUT:
 					goto cleanup;
 				case KEY_UP: