--- lbbs/src/screen.c	2025/05/17 05:56:17	1.55
+++ lbbs/src/screen.c	2025/05/17 12:28:47	1.60
@@ -298,7 +298,7 @@ int display_file_ex(const char *filename
 				input_ok = 1;
 				switch (ch)
 				{
-				case KEY_NULL:
+				// case KEY_NULL:
 				case KEY_TIMEOUT:
 					goto cleanup;
 				case KEY_HOME:
@@ -395,7 +395,6 @@ int display_file_ex(const char *filename
 					clrline(begin_line, SCREEN_ROWS);
 					break;
 				default:
-					log_std("Input: %d\n", ch);
 					input_ok = 0;
 					break;
 				}
@@ -432,53 +431,73 @@ cleanup:
 	return ch;
 }
 
-int show_top(char *status)
+int show_top(const char *status)
 {
+	char status_f[21];
 	int truncate;
 	int status_len;
 	int section_name_len;
 	int len;
 
-	len = split_line(status, 20, &truncate, &status_len);
+	strncpy(status_f, status, sizeof(status_f) - 1);
+	status_f[sizeof(status_f) - 1] = '\0';
+
+	len = split_line(status_f, 20, &truncate, &status_len);
 	if (truncate)
 	{
-		status[len] = '\0';
+		log_error("Status string is truncated\n");
+		status_f[len] = '\0';
 	}
 
 	len = split_line(BBS_current_section_name, 20, &truncate, &section_name_len);
 	if (truncate)
 	{
-		status[len] = '\0';
+		log_error("Section name is truncated\n");
 	}
 
 	moveto(1, 0);
 	clrtoeol();
-	prints("\033[1;44;33m%s \033[37m%*s%*s\033[33m ÌÖÂÛÇø [%s]\033[m",
-		   status, (39 - status_len), BBS_name, (30 - section_name_len), "", BBS_current_section_name);
+	prints("\033[1;44;33m%s\033[37m%*s%*s\033[33m ÌÖÂÛÇø [%s]\033[m",
+		   status_f, 32, BBS_name, 26, "", BBS_current_section_name);
 	iflush();
 
 	return 0;
 }
 
-int show_bottom(char *msg)
+int show_bottom(const char *msg)
 {
 	char str_time[LINE_BUFFER_LEN];
-	char space[LINE_BUFFER_LEN];
 	time_t time_online;
 	struct tm *tm_online;
+	char msg_f[21];
+	int truncate;
+	int msg_len;
+	int len;
+	int len_username;
 
 	get_time_str(str_time, sizeof(str_time));
-	str_space(space, 34 - (int)strnlen(BBS_username, sizeof(BBS_username)));
+
+	strncpy(msg_f, msg, sizeof(msg_f) - 1);
+	msg_f[sizeof(msg_f) - 1] = '\0';
+
+	len = split_line(msg_f, 20, &truncate, &msg_len);
+	if (truncate)
+	{
+		log_error("Status string is truncated\n");
+		msg_f[len] = '\0';
+	}
+
+	len_username = (int)strnlen(BBS_username, sizeof(BBS_username));
 
 	time_online = time(0) - BBS_login_tm;
 	tm_online = gmtime(&time_online);
 
 	moveto(SCREEN_ROWS, 0);
 	clrtoeol();
-	prints("\033[1;44;33m[\033[36m%s\033[33m]%sÕʺÅ[\033[36m%s\033[33m]"
+	prints("\033[1;44;33m[\033[36m%s\033[33m]%*s%*sÕʺÅ[\033[36m%s\033[33m]"
 		   "[\033[36m%1d\033[33m:\033[36m%2d\033[33m:\033[36m%2d\033[33m]\033[m",
-		   str_time, space, BBS_username, tm_online->tm_mday - 1,
-		   tm_online->tm_hour, tm_online->tm_min);
+		   str_time, 21, msg_f, 13 - len_username, "", BBS_username,
+		   tm_online->tm_mday - 1, tm_online->tm_hour, tm_online->tm_min);
 	iflush();
 
 	return 0;
@@ -486,48 +505,55 @@ int show_bottom(char *msg)
 
 int show_active_board()
 {
-	char filename[FILE_PATH_LEN];
-	char buffer[LINE_BUFFER_LEN];
-	FILE *fin;
-	static int line;
-	int len;
-	int end_of_line;
-	int display_len;
+	static int line_current = 0;
+	static const void *p_file_shm = NULL;
+	static const void *p_data;
+	static size_t data_len;
+	static long line_total;
+	static const long *p_line_offsets;
 
-	clrline(3, 2 + ACTIVE_BOARD_HEIGHT);
-
-	if ((fin = fopen(DATA_ACTIVE_BOARD, "r")) == NULL)
-	{
-		log_error("Unable to open file %s\n", filename);
-		return -1;
-	}
+	char buffer[LINE_BUFFER_LEN];
+	long int len;
 
-	for (int i = 0; i < line; i++)
+	if (p_file_shm == NULL)
 	{
-		if (fgets(buffer, sizeof(buffer), fin) == NULL)
+		if ((p_file_shm = get_file_shm(DATA_ACTIVE_BOARD)) == NULL)
 		{
-			line = 0;
-			rewind(fin);
-			break;
+			log_error("get_file_shm(%s) error\n", DATA_ACTIVE_BOARD);
+			return KEY_NULL;
 		}
+
+		data_len = *((size_t *)p_file_shm);
+		line_total = *((long *)(p_file_shm + sizeof(size_t)));
+		p_data = p_file_shm + sizeof(data_len) + sizeof(line_total);
+		p_line_offsets = p_data + data_len + 1;
 	}
 
+	clrline(3, 2 + ACTIVE_BOARD_HEIGHT);
+
 	for (int i = 0; i < ACTIVE_BOARD_HEIGHT; i++)
 	{
-		if (fgets(buffer, sizeof(buffer), fin) == NULL)
+		len = p_line_offsets[line_current + 1] - p_line_offsets[line_current];
+		if (len >= LINE_BUFFER_LEN)
 		{
-			line = 0;
-			break;
+			log_error("Error length exceeds buffer size: %d\n", len);
+			len = LINE_BUFFER_LEN - 1;
 		}
-		line++;
-		len = split_line(buffer, SCREEN_COLS, &end_of_line, &display_len);
-		buffer[len] = '\0'; // Truncate over-length line
+
+		memcpy(buffer, (const char *)p_data + p_line_offsets[line_current], (size_t)len);
+		buffer[len] = '\0';
+
 		moveto(3 + i, 0);
 		prints("%s", buffer);
+
+		line_current++;
+		if (line_current >= line_total)
+		{
+			line_current = 0;
+			break;
+		}
 	}
 	iflush();
 
-	fclose(fin);
-
 	return 0;
 }