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