help.c 921 B

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  1. /*
  2. * Copyright 2000-2009
  3. * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  4. *
  5. * SPDX-License-Identifier: GPL-2.0+
  6. */
  7. #include <common.h>
  8. #include <command.h>
  9. static int do_help(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  10. {
  11. #ifdef CONFIG_CMDLINE
  12. cmd_tbl_t *start = ll_entry_start(cmd_tbl_t, cmd);
  13. const int len = ll_entry_count(cmd_tbl_t, cmd);
  14. return _do_help(start, len, cmdtp, flag, argc, argv);
  15. #else
  16. return 0;
  17. #endif
  18. }
  19. U_BOOT_CMD(
  20. help, CONFIG_SYS_MAXARGS, 1, do_help,
  21. "print command description/usage",
  22. "\n"
  23. " - print brief description of all commands\n"
  24. "help command ...\n"
  25. " - print detailed usage of 'command'"
  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. };