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
do_help(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])10 static 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
22 U_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 /* This does not use the U_BOOT_CMD macro as ? can't be used in symbol names */
33 ll_entry_declare(struct cmd_tbl, question_mark, cmd) = {
34 "?", CONFIG_SYS_MAXARGS, cmd_always_repeatable, do_help,
35 "alias for 'help'",
36 #ifdef CONFIG_SYS_LONGHELP
37 ""
38 #endif /* CONFIG_SYS_LONGHELP */
39 };
40 #endif
41