+int child_stdin;
+
+/*
+ * Clears all blocks from the statusline structure in memory and frees their
+ * associated resources.
+ */
+static void clear_status_blocks() {
+ struct status_block *first;
+ while (!TAILQ_EMPTY(&statusline_head)) {
+ first = TAILQ_FIRST(&statusline_head);
+ I3STRING_FREE(first->full_text);
+ TAILQ_REMOVE(&statusline_head, first, blocks);
+ free(first);
+ }
+}
+
+/*
+ * Replaces the statusline in memory with an error message. Pass a format
+ * string and format parameters as you would in `printf'. The next time
+ * `draw_bars' is called, the error message text will be drawn on the bar in
+ * the space allocated for the statusline.
+ */
+__attribute__((format(printf, 1, 2))) static void set_statusline_error(const char *format, ...) {
+ clear_status_blocks();
+
+ char *message;
+ va_list args;
+ va_start(args, format);
+ vasprintf(&message, format, args);
+
+ struct status_block *err_block = scalloc(sizeof(struct status_block));
+ err_block->full_text = i3string_from_utf8("Error: ");
+ err_block->name = "error";
+ err_block->color = "red";
+ err_block->no_separator = true;
+
+ struct status_block *message_block = scalloc(sizeof(struct status_block));
+ message_block->full_text = i3string_from_utf8(message);
+ message_block->name = "error_message";
+ message_block->color = "red";
+ message_block->no_separator = true;
+
+ TAILQ_INSERT_HEAD(&statusline_head, err_block, blocks);
+ TAILQ_INSERT_TAIL(&statusline_head, message_block, blocks);
+
+ FREE(message);
+ va_end(args);
+}
+