+ register_task(&sit->task);
+
+ for (i = 0, parent = sit->btrn; i < conf.filter_given; i++) {
+ char *fa = conf.filter_arg[i];
+ struct filter_node *fn = para_calloc(sizeof(*fn));
+
+ ret = check_filter_arg(fa, &fn->conf);
+ if (ret < 0) {
+ free(fn);
+ goto err;
+ }
+ fn->filter_num = ret;
+ f = filters + fn->filter_num;
+ sprintf(fn->task.status, "%s", f->name);
+ PARA_DEBUG_LOG("filter #%d: %s\n", i, f->name);
+ fn->btrn = btr_new_node(f->name, parent, f->execute, fn);
+ fn->task.pre_select = f->pre_select;
+ fn->task.post_select = f->post_select;
+ f->open(fn);
+ register_task(&fn->task);
+ parent = fn->btrn;
+ }
+ sot->btrn = btr_new_node("stdout", parent, NULL, NULL);
+ stdout_set_defaults(sot);
+ register_task(&sot->task);
+
+ s.default_timeout.tv_sec = 1;
+ s.default_timeout.tv_usec = 0;
+ ret = schedule(&s);
+err:
+ if (ret < 0)
+ PARA_EMERG_LOG("%s\n", para_strerror(-ret));
+ exit(ret < 0? EXIT_FAILURE : EXIT_SUCCESS);
+}
+
+/**
+ * The main function of para_filter.
+ *
+ * Para_filter reads data from stdin, converts it by using a chain
+ * of filters (specified on the command line) and writes the resulting
+ * data to stdout.
+ *
+ * \param argc Number of command line options.
+ * \param argv Vector of arguments.
+ *
+ * \return \a EXIT_SUCCESS on success, EXIT_FAILURE on errors.
+ */
+int main(int argc, char *argv[])
+{
+ int ret;
+ static struct sched s;