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 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 } 17 18 U_BOOT_CMD( 19 help, CONFIG_SYS_MAXARGS, 1, do_help, 20 "print command description/usage", 21 "\n" 22 " - print brief description of all commands\n" 23 "help command ...\n" 24 " - print detailed usage of 'command'" 25 ); 26 27 /* This does not use the U_BOOT_CMD macro as ? can't be used in symbol names */ 28 ll_entry_declare(cmd_tbl_t, question_mark, cmd) = { 29 "?", CONFIG_SYS_MAXARGS, 1, do_help, 30 "alias for 'help'", 31 #ifdef CONFIG_SYS_LONGHELP 32 "" 33 #endif /* CONFIG_SYS_LONGHELP */ 34 }; 35