cmd_help.c 1.5 KB

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  1. /*
  2. * Copyright 2000-2009
  3. * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  4. *
  5. * See file CREDITS for list of people who contributed to this
  6. * project.
  7. *
  8. * This program is free software; you can redistribute it and/or
  9. * modify it under the terms of the GNU General Public License as
  10. * published by the Free Software Foundation; either version 2 of
  11. * the License, or (at your option) any later version.
  12. *
  13. * This program is distributed in the hope that it will be useful,
  14. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16. * GNU General Public License for more details.
  17. *
  18. * You should have received a copy of the GNU General Public License
  19. * along with this program; if not, write to the Free Software
  20. * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21. * MA 02111-1307 USA
  22. */
  23. #include <common.h>
  24. #include <command.h>
  25. int do_help(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
  26. {
  27. return _do_help(&__u_boot_cmd_start,
  28. &__u_boot_cmd_end - &__u_boot_cmd_start,
  29. cmdtp, flag, argc, argv);
  30. }
  31. U_BOOT_CMD(
  32. help, CONFIG_SYS_MAXARGS, 1, do_help,
  33. "print command description/usage",
  34. "\n"
  35. " - print brief description of all commands\n"
  36. "help command ...\n"
  37. " - print detailed usage of 'command'"
  38. );
  39. /* This does not use the U_BOOT_CMD macro as ? can't be used in symbol names */
  40. cmd_tbl_t __u_boot_cmd_question_mark Struct_Section = {
  41. "?", CONFIG_SYS_MAXARGS, 1, do_help,
  42. "alias for 'help'",
  43. #ifdef CONFIG_SYS_LONGHELP
  44. ""
  45. #endif /* CONFIG_SYS_LONGHELP */
  46. };