config: read flush.cfg when elm_config_all_flush is called.

When elm_config_all_flush is called, another processes should get
the config of current process instead of saved base.cfg.
so current process save the config to flush.cfg and another processes
read it when it is changed.

@fix

legacy/elementary/src/lib/elm_config.c

@@ -116,7 +116,6 @@ static void        _config_free(Elm_Config *cfg);
 static void        _config_apply(void);
 static void        _config_sub_apply(void);
 static void        _config_update(void);
-static void        _config_get(void);
 static void        _env_get(void);
 static void        _color_overlays_cancel(void);
 
@@ -1468,13 +1467,53 @@ _config_load(void)
 }
 
 static void
-_config_get(void)
+_config_flush_load(void)
+{
+   Elm_Config *cfg = NULL;
+   Eet_File *ef;
+   char buf[PATH_MAX];
+
+   _elm_config_user_dir_snprintf(buf, sizeof(buf), "config/flush.cfg");
+
+   ef = eet_open(buf, EET_FILE_MODE_READ);
+   if (ef)
+     {
+        cfg = eet_data_read(ef, _config_edd, "config");
+        eet_close(ef);
+     }
+
+   if (cfg)
+     {
+        size_t len;
+
+        len = _elm_config_user_dir_snprintf(buf, sizeof(buf), "themes/");
+        if (len + 1 < sizeof(buf))
+          ecore_file_mkpath(buf);
+
+        _elm_config = cfg;
+
+        if ((_elm_config->config_version >> ELM_CONFIG_VERSION_EPOCH_OFFSET) < ELM_CONFIG_EPOCH)
+           {
+              WRN("User's elementary config seems outdated and unusable. Fallback to load system config.");
+              _config_free(_elm_config);
+              _elm_config = NULL;
+           }
+        else
+          {
+             if (_elm_config->config_version < ELM_CONFIG_VERSION)
+               _config_update();
+          }
+     }
+}
+
+static void
+_config_flush_get(void)
 {
    _elm_config_font_overlays_cancel();
    _color_overlays_cancel();
    _config_free(_elm_config);
    _elm_config = NULL;
-   _config_load();
+   _config_flush_load();
    _env_get();
    _config_apply();
    _config_sub_apply();
@@ -3062,16 +3101,83 @@ elm_config_window_auto_focus_animate_set(Eina_Bool enable)
 EAPI void
 elm_config_all_flush(void)
 {
-   FILE *f;
-   char buf[PATH_MAX];
+   char buf[4096], buf2[4096];
+   int ok = 0, ret;
+   const char *err;
+   Eet_File *ef;
+   size_t len;
 
-   _elm_config_user_dir_snprintf(buf, sizeof(buf), "config/flush");
-   f = fopen(buf, "w+");
-   if (f)
+   len = _elm_config_user_dir_snprintf(buf, sizeof(buf), "themes/");
+   if (len + 1 >= sizeof(buf))
+     return;
+
+   ok = ecore_file_mkpath(buf);
+   if (!ok)
      {
-        fprintf(f, "flush");
-        fclose(f);
+        ERR("Problem accessing Elementary's user configuration directory: %s",
+            buf);
+        return;
      }
+
+   len = _elm_config_user_dir_snprintf(buf, sizeof(buf), "config");
+   if (len + 1 >= sizeof(buf))
+     return;
+
+   ok = ecore_file_mkpath(buf);
+   if (!ok)
+     {
+        ERR("Problem accessing Elementary's user configuration directory: %s",
+            buf);
+        return;
+     }
+
+   if (!_elm_config_profile_save())
+     return;
+
+   buf[len] = '/';
+   len++;
+
+   if (len + sizeof("flush.cfg") >= sizeof(buf) - len)
+     return;
+
+   memcpy(buf + len, "flush.cfg", sizeof("flush.cfg"));
+   len += sizeof("flush.cfg") - 1;
+
+   if (len + sizeof(".tmp") >= sizeof(buf))
+     return;
+
+   memcpy(buf2, buf, len);
+   memcpy(buf2 + len, ".tmp", sizeof(".tmp"));
+
+   ef = eet_open(buf2, EET_FILE_MODE_WRITE);
+   if (!ef)
+     return;
+
+   ok = eet_data_write(ef, _config_edd, "config", _elm_config, 1);
+   if (!ok)
+     goto err;
+
+   err = _elm_config_eet_close_error_get(ef, buf2);
+   if (err)
+     {
+        ERR("%s", err);
+        free((void *)err);
+        goto err;
+     }
+
+   ret = ecore_file_mv(buf2, buf);
+   if (!ret)
+     {
+        ERR("Error saving Elementary's configuration file");
+        goto err;
+     }
+
+   ecore_file_unlink(buf2);
+   return;
+
+err:
+   ecore_file_unlink(buf2);
+   return;
 }
 
 static void
@@ -3134,7 +3240,10 @@ _elm_config_sub_shutdown(void)
 static Eina_Bool
 _config_change_delay_cb(void *data EINA_UNUSED)
 {
-   _config_get();
+   char buf[PATH_MAX];
+
+   _elm_config_user_dir_snprintf(buf, sizeof(buf), "config/flush.cfg");
+   if (ecore_file_exists(buf)) _config_flush_get();
    _config_change_delay_timer = NULL;
 
    return ECORE_CALLBACK_CANCEL;
@@ -3229,7 +3338,7 @@ _elm_config_sub_init(void)
    int ok = 0;
 
    len = _elm_config_user_dir_snprintf(buf, sizeof(buf), "config/");
-   if (len + 6 >= sizeof(buf)) // the space to add "flush"
+   if (len + 10 >= sizeof(buf)) // the space to add "flush.cfg"
      goto end;
 
    ok = ecore_file_mkpath(buf);
@@ -3240,18 +3349,9 @@ _elm_config_sub_init(void)
         goto end;
      }
 
-   strcat(buf, "flush");
-   if (!ecore_file_exists(buf))
-     {
-        FILE *f = fopen(buf, "w+");
+   strcat(buf, "flush.cfg");
+   if (!ecore_file_exists(buf)) elm_config_all_flush();
 
-        if (f)
-          {
-             fprintf(f, "flush");
-             fclose(f);
-             goto end;
-          }
-     }
    _eio_monitor = eio_monitor_add(buf);
    ecore_event_handler_add(EIO_MONITOR_FILE_MODIFIED, _elm_config_file_monitor_cb, NULL);