xref: /openbmc/u-boot/cmd/help.c (revision 17fa0326)
1 /*
2  * Copyright 2000-2009
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * SPDX-License-Identifier:	GPL-2.0+
6  */
7 
8 #include <common.h>
9 #include <command.h>
10 
11 static int do_help(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
12 {
13 #ifdef CONFIG_CMDLINE
14 	cmd_tbl_t *start = ll_entry_start(cmd_tbl_t, cmd);
15 	const int len = ll_entry_count(cmd_tbl_t, 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 /* This does not use the U_BOOT_CMD macro as ? can't be used in symbol names */
32 ll_entry_declare(cmd_tbl_t, question_mark, cmd) = {
33 	"?",	CONFIG_SYS_MAXARGS,	1,	do_help,
34 	"alias for 'help'",
35 #ifdef  CONFIG_SYS_LONGHELP
36 	""
37 #endif /* CONFIG_SYS_LONGHELP */
38 };
39