--- lbbs/src/screen.c	2025/05/10 15:23:42	1.44
+++ lbbs/src/screen.c	2025/05/13 10:41:31	1.48
@@ -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 +112,22 @@ static int _str_input(char *buffer, int
 	for (offset = 0; offset < buf_size - 1 && buffer[offset] != '\0'; offset++)
 		;
 
-	while (!SYS_server_exit && (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 +160,7 @@ 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(0); // Ignore 1 character
 				outc('\a');
 				iflush();
 				continue;
@@ -210,8 +214,6 @@ int get_data(int row, int col, char *pro
 {
 	int len;
 
-	igetch(1); // Cleanup input buffer
-
 	moveto(row, col);
 	prints(prompt);
 	prints(buffer);
@@ -319,6 +321,7 @@ int display_file_ex(const char *filename
 				input_ok = 1;
 				switch (ch)
 				{
+				case KEY_NULL:
 				case KEY_TIMEOUT:
 					goto cleanup;
 				case KEY_UP: