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cmd/help.c 921 Bytes
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  /*
   * Copyright 2000-2009
   * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   *
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   * SPDX-License-Identifier:	GPL-2.0+
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   */
  
  #include <common.h>
  #include <command.h>
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  static int do_help(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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  {
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  #ifdef CONFIG_CMDLINE
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  	cmd_tbl_t *start = ll_entry_start(cmd_tbl_t, cmd);
  	const int len = ll_entry_count(cmd_tbl_t, cmd);
  	return _do_help(start, len, cmdtp, flag, argc, argv);
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  #else
  	return 0;
  #endif
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  }
  
  U_BOOT_CMD(
  	help,	CONFIG_SYS_MAXARGS,	1,	do_help,
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  	"print command description/usage",
  	"
  "
  	"	- print brief description of all commands
  "
  	"help command ...
  "
  	"	- print detailed usage of 'command'"
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  );
  
  /* This does not use the U_BOOT_CMD macro as ? can't be used in symbol names */
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  ll_entry_declare(cmd_tbl_t, question_mark, cmd) = {
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  	"?",	CONFIG_SYS_MAXARGS,	1,	do_help,
  	"alias for 'help'",
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  #ifdef  CONFIG_SYS_LONGHELP
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  	""
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  #endif /* CONFIG_SYS_LONGHELP */
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  };