+
+ entry = script_lookup_function(script, st->argv->argv[0]);
+ if (!entry) {
+ pb_log("grub2: undefined function '%s'\n", st->argv->argv[0]);
+ return 1;
+ }
+
+ rc = entry->fn(script, entry->data, st->argv->argc, st->argv->argv);
+
+ return rc;
+}
+
+int statement_block_execute(struct grub2_script *script,
+ struct grub2_statement *statement)
+{
+ struct grub2_statement_block *st = to_stmt_block(statement);
+ return statements_execute(script, st->statements);
+}
+
+/* returns 0 if the statement was executed, 1 otherwise */
+static int statement_conditional_execute(struct grub2_script *script,
+ struct grub2_statement *statement, bool *executed)
+{
+ struct grub2_statement_conditional *st = to_stmt_conditional(statement);
+ int rc;
+
+ rc = st->condition->exec(script, st->condition);
+ *executed = (!rc);
+ if (*executed)
+ rc = statements_execute(script, st->statements);
+
+ return rc;
+}
+
+int statement_if_execute(struct grub2_script *script,
+ struct grub2_statement *statement)
+{
+ struct grub2_statement_if *st = to_stmt_if(statement);
+ struct grub2_statement *conditional;
+ bool executed;
+ int rc = 0;
+
+ list_for_each_entry(&st->conditionals->list, conditional, list) {
+ rc = statement_conditional_execute(script,
+ conditional, &executed);
+ if (executed)
+ break;
+ }
+
+ if (!executed && st->else_case)
+ rc = statements_execute(script, st->else_case);
+
+ return rc;
+}
+
+int statement_menuentry_execute(struct grub2_script *script,
+ struct grub2_statement *statement)
+{
+ struct grub2_statement_menuentry *st = to_stmt_menuentry(statement);
+ struct discover_boot_option *opt;
+
+ process_expansions(script, st->argv);
+
+ opt = discover_boot_option_create(script->ctx, script->ctx->device);
+ if (st->argv->argc > 0) {
+ opt->option->name = talloc_strdup(opt, st->argv->argv[0]);
+ } else {
+ opt->option->name = talloc_strdup(opt, "(unknown)");
+ }
+ opt->option->id = talloc_asprintf(opt->option, "%s#%s",
+ script->ctx->device->device->id,
+ opt->option->name);
+
+ script->opt = opt;
+
+ statements_execute(script, st->statements);
+
+ opt->option->is_default = option_is_default(script, opt);
+
+ discover_context_add_boot_option(script->ctx, opt);
+ script->n_options++;
+ script->opt = NULL;
+
+ return 0;
+}
+
+static int function_invoke(struct grub2_script *script,
+ void *data, int argc, char **argv)
+{
+ struct grub2_statement_function *fn = data;
+ char *name;
+ int i;
+
+ /* set positional parameters */
+ for (i = 0; i < argc; i++) {
+ name = talloc_asprintf(script, "$%d", i);
+ script_env_set(script, name, argv[i]);
+ }
+
+ return statements_execute(script, fn->body);
+}
+
+int statement_function_execute(struct grub2_script *script,
+ struct grub2_statement *statement)
+{
+ struct grub2_statement_function *st = to_stmt_function(statement);
+ const char *name;
+
+ if (st->name->type == GRUB2_WORD_VAR)
+ expand_var(script, st->name);
+
+ name = st->name->text;
+ script_register_function(script, name, function_invoke, st);
+
+ return 0;
+}
+
+static void init_env(struct grub2_script *script)
+{
+ struct env_entry *env;