jcs.org
"Das U-Boot" Source Tree
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 <command.h>
8
9static int do_help(struct cmd_tbl *cmdtp, int flag, int argc,
10 char *const argv[])
11{
12#ifdef CONFIG_CMDLINE
13 struct cmd_tbl *start = ll_entry_start(struct cmd_tbl, cmd);
14 const int len = ll_entry_count(struct cmd_tbl, cmd);
15 return _do_help(start, len, cmdtp, flag, argc, argv);
16#else
17 return 0;
18#endif
19}
20
21U_BOOT_CMD(
22 help, CONFIG_SYS_MAXARGS, 1, do_help,
23 "print command description/usage",
24 "\n"
25 " - print brief description of all commands\n"
26 "help command ...\n"
27 " - print detailed usage of 'command'"
28);
29
30#ifdef CONFIG_CMDLINE
31/*
32 * This does not use the U_BOOT_CMD macro as ? can't be used in symbol names
33 * nor can we rely on the CONFIG_SYS_LONGHELP helper macro
34 */
35ll_entry_declare(struct cmd_tbl, question_mark, cmd) = {
36 "?", CONFIG_SYS_MAXARGS, cmd_always_repeatable, do_help,
37 "alias for 'help'",
38#ifdef CONFIG_SYS_LONGHELP
39 ""
40#endif /* CONFIG_SYS_LONGHELP */
41};
42#endif