Merge tag 'u-boot-rockchip-20190819' of https://gitlab.denx.de/u-boot/custodians...
[platform/kernel/u-boot.git] / cmd / help.c
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
10 static int do_help(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
11 {
12 #ifdef CONFIG_CMDLINE
13         cmd_tbl_t *start = ll_entry_start(cmd_tbl_t, cmd);
14         const int len = ll_entry_count(cmd_tbl_t, cmd);
15         return _do_help(start, len, cmdtp, flag, argc, argv);
16 #else
17         return 0;
18 #endif
19 }
20
21 U_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 /* 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, cmd_always_repeatable,      do_help,
34         "alias for 'help'",
35 #ifdef  CONFIG_SYS_LONGHELP
36         ""
37 #endif /* CONFIG_SYS_LONGHELP */
38 };
39 #endif