LXR uboot/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
  10static 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
  22U_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 */
  33ll_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