help.c 967 B

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright 2000-2009
  4. * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  5. */
  6. #include <common.h>
  7. #include <command.h>
  8. static int do_help(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  9. {
  10. #ifdef CONFIG_CMDLINE
  11. cmd_tbl_t *start = ll_entry_start(cmd_tbl_t, cmd);
  12. const int len = ll_entry_count(cmd_tbl_t, cmd);
  13. return _do_help(start, len, cmdtp, flag, argc, argv);
  14. #else
  15. return 0;
  16. #endif
  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. #ifdef CONFIG_CMDLINE
  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, cmd_always_repeatable, do_help,
  30. "alias for 'help'",
  31. #ifdef CONFIG_SYS_LONGHELP
  32. ""
  33. #endif /* CONFIG_SYS_LONGHELP */
  34. };
  35. #endif