+ return command_unknown_find(--argc, ++argv, (*out)->children, out);
+}
+
+static char *alloc_concatenate_strings(int argc, Jim_Obj * const *argv)
+{
+ char *prev, *all;
+ int i;
+
+ assert(argc >= 1);
+
+ all = strdup(Jim_GetString(argv[0], NULL));
+ if (!all) {
+ LOG_ERROR("Out of memory");
+ return NULL;
+ }
+
+ for (i = 1; i < argc; ++i) {
+ prev = all;
+ all = alloc_printf("%s %s", all, Jim_GetString(argv[i], NULL));
+ free(prev);
+ if (!all) {
+ LOG_ERROR("Out of memory");
+ return NULL;
+ }
+ }
+
+ return all;
+}
+
+static int run_usage(Jim_Interp *interp, int argc_valid, int argc, Jim_Obj * const *argv)
+{
+ struct command_context *cmd_ctx = current_command_context(interp);
+ char *command;
+ int retval;
+
+ assert(argc_valid >= 1);
+ assert(argc >= argc_valid);
+
+ command = alloc_concatenate_strings(argc_valid, argv);
+ if (!command)
+ return JIM_ERR;
+
+ retval = command_run_linef(cmd_ctx, "usage %s", command);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("unable to execute command \"usage %s\"", command);
+ return JIM_ERR;
+ }
+
+ if (argc_valid == argc)
+ LOG_ERROR("%s: command requires more arguments", command);
+ else {
+ free(command);
+ command = alloc_concatenate_strings(argc - argc_valid, argv + argc_valid);
+ if (!command)
+ return JIM_ERR;
+ LOG_ERROR("invalid subcommand \"%s\"", command);
+ }
+
+ free(command);
+ return retval;
+}
+
+static int exec_command(Jim_Interp *interp, struct command_context *cmd_ctx,
+ struct command *c, int argc, Jim_Obj *const *argv)
+{
+ if (c->jim_handler)
+ return c->jim_handler(interp, argc, argv);
+
+ /* use c->handler */
+ unsigned int nwords;
+ char **words = script_command_args_alloc(argc, argv, &nwords);
+ if (!words)
+ return JIM_ERR;
+
+ int retval = run_command(cmd_ctx, c, (const char **)words, nwords);
+ script_command_args_free(words, nwords);
+ return command_retval_set(interp, retval);