1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * Copyright 2000-2009 4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 5 */ 6 7#include <common.h> 8#include <command.h> 9 10static int do_help(struct cmd_tbl *cmdtp, int flag, int argc, 11 char *const argv[]) 12{ 13#ifdef CONFIG_CMDLINE 14 struct cmd_tbl *start = ll_entry_start(struct cmd_tbl, cmd); 15 const int len = ll_entry_count(struct cmd_tbl, cmd); 16 return _do_help(start, len, cmdtp, flag, argc, argv); 17#else 18 return 0; 19#endif 20} 21 22U_BOOT_CMD( 23 help, CONFIG_SYS_MAXARGS, 1, do_help, 24 "print command description/usage", 25 "\n" 26 " - print brief description of all commands\n" 27 "help command ...\n" 28 " - print detailed usage of 'command'" 29); 30 31#ifdef CONFIG_CMDLINE 32/* 33 * This does not use the U_BOOT_CMD macro as ? can't be used in symbol names 34 * nor can we rely on the CONFIG_SYS_LONGHELP helper macro 35 */ 36ll_entry_declare(struct cmd_tbl, question_mark, cmd) = { 37 "?", CONFIG_SYS_MAXARGS, cmd_always_repeatable, do_help, 38 "alias for 'help'", 39#ifdef CONFIG_SYS_LONGHELP 40 "" 41#endif /* CONFIG_SYS_LONGHELP */ 42}; 43#endif 44