Fix freeze/crash when sigwinch signal is received during refresh (for example if repaint is done during terminal resize)

src/gui/curses/gui-curses-main.c

@@ -28,7 +28,6 @@
 #include <unistd.h>
 #include <string.h>
 #include <signal.h>
-#include <sys/ioctl.h>
 
 #include "../../core/weechat.h"
 #include "../../core/wee-command.h"
@@ -87,7 +86,6 @@ gui_main_init ()
     struct t_gui_buffer *ptr_buffer;
     struct t_gui_bar *ptr_bar;
     struct t_gui_bar_window *ptr_bar_win;
-    struct winsize size;
     
     initscr ();
     
@@ -106,15 +104,7 @@ gui_main_init ()
     gui_term_cols  = COLS;
     gui_term_lines = LINES;
     
-    if (ioctl (fileno (stdout), TIOCGWINSZ, &size) == 0)
-    {
-        resizeterm(size.ws_row, size.ws_col);
-        gui_term_cols = size.ws_col;
-        gui_term_lines = size.ws_row;
-    }
-    
-    gui_ok = ((gui_term_cols >= GUI_WINDOW_MIN_WIDTH)
-              && (gui_term_lines >= GUI_WINDOW_MIN_HEIGHT));
+    gui_window_read_terminal_size ();
     
     /* init clipboard buffer */
     gui_input_clipboard = NULL;
@@ -215,26 +205,7 @@ gui_main_signal_sighup ()
 void
 gui_main_signal_sigwinch ()
 {
-    struct winsize size;
-    int new_width, new_height;
-    
-    if (ioctl (fileno (stdout), TIOCGWINSZ, &size) == 0)
-    {
-        resizeterm (size.ws_row, size.ws_col);
-        gui_term_cols = size.ws_col;
-        gui_term_lines = size.ws_row;
-        gui_ok = ((gui_term_cols >= GUI_WINDOW_MIN_WIDTH)
-                  && (gui_term_lines >= GUI_WINDOW_MIN_HEIGHT));
-        wrefresh (curscr);
-    }
-    else
-    {
-        getmaxyx (stdscr, new_height, new_width);
-        gui_term_cols = new_width;
-        gui_term_lines = new_height;
-    }
-    
-    gui_window_ask_refresh (1);
+    gui_window_ask_refresh (2);
 }
 
 /*

src/gui/curses/gui-curses-window.c

@@ -26,6 +26,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <libgen.h>
+#include <sys/ioctl.h>
 
 #include "../../core/weechat.h"
 #include "../../core/wee-config.h"
@@ -72,6 +73,33 @@ gui_window_get_height ()
     return gui_term_lines;
 }
 
+/*
+ * gui_window_read_terminal_size: read terminal size
+ */
+
+void
+gui_window_read_terminal_size ()
+{
+    struct winsize size;
+    int new_width, new_height;
+    
+    if (ioctl (fileno (stdout), TIOCGWINSZ, &size) == 0)
+    {
+        resizeterm (size.ws_row, size.ws_col);
+        gui_term_cols = size.ws_col;
+        gui_term_lines = size.ws_row;
+    }
+    else
+    {
+        getmaxyx (stdscr, new_height, new_width);
+        gui_term_cols = new_width;
+        gui_term_lines = new_height;
+    }
+    
+    gui_ok = ((gui_term_cols >= GUI_WINDOW_MIN_WIDTH)
+              && (gui_term_lines >= GUI_WINDOW_MIN_HEIGHT));
+}
+
 /*
  * gui_window_objects_init: init Curses windows
  */
@@ -1322,21 +1350,21 @@ gui_window_switch_right (struct t_gui_window *window)
 
 /*
  * gui_window_refresh_screen: called when term size is modified
- *                            full_refresh == 1 when Ctrl+L is pressed
+ *                            full_refresh == 1 when Ctrl+L is pressed,
+ *                            or if terminal is resized
  */
 
 void
 gui_window_refresh_screen (int full_refresh)
 {
-    if (gui_ok)
+    if (full_refresh)
     {
-        if (full_refresh)
-        {
-            endwin ();
-            refresh ();
-        }
-        gui_window_refresh_windows ();
+        endwin ();
+        refresh ();
+        gui_window_read_terminal_size ();
     }
+    
+    gui_window_refresh_windows ();
 }
 
 /*

src/gui/curses/gui-curses.h

@@ -70,6 +70,7 @@ extern void gui_keyboard_default_bindings ();
 extern int gui_keyboard_read_cb (void *data, int fd);
 
 /* window functions */
+extern void gui_window_read_terminal_size ();
 extern void gui_window_redraw_buffer (struct t_gui_buffer *buffer);
 extern int gui_window_utf_char_valid (const char *utf_char);
 extern void gui_window_clear (WINDOW *window, int bg);