builtins/builtin.def

This file is builtin.def, from which is created builtin.c.
It implements the builtin "builtin" in Bash.

Copyright (C) 1987-2002 Free Software Foundation, Inc.

This file is part of GNU Bash, the Bourne Again SHell.

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the terms of the GNU General Public License as published by the Free
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version.

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$PRODUCES builtin.c

$BUILTIN builtin
$FUNCTION builtin_builtin
$SHORT_DOC builtin [shell-builtin [arg ...]]
Run a shell builtin.  This is useful when you wish to rename a
shell builtin to be a function, but need the functionality of the
builtin within the function itself.
$END
#include <config.h>

#if defined (HAVE_UNISTD_H)
#  ifdef _MINIX
#    include <sys/types.h>
#  endif
#  include <unistd.h>
#endif

#include "../shell.h"
#include "common.h"
#include "bashgetopt.h"

extern char *this_command_name;

/* Run the command mentioned in list directly, without going through the
   normal alias/function/builtin/filename lookup process. */
int
builtin_builtin (list)
     WORD_LIST *list;
{
  sh_builtin_func_t *function;
  register char *command;

  if (no_options (list))
    return (EX_USAGE);
  list = loptend;	/* skip over possible `--' */

  if (list == 0)
    return (EXECUTION_SUCCESS);

  command = list->word->word;
#if defined (DISABLED_BUILTINS)
  function = builtin_address (command);
#else /* !DISABLED_BUILTINS */
  function = find_shell_builtin (command);
#endif /* !DISABLED_BUILTINS */

  if (!function)
    {
      builtin_error ("%s: not a shell builtin", command);
      return (EXECUTION_FAILURE);
    }
  else
    {
      this_command_name = command;
      list = list->next;
      return ((*function) (list));
    }
}