晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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/* Copyright (C) 1991-2018 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#ifndef	_WORDEXP_H
#define	_WORDEXP_H	1

#include <features.h>
#define __need_size_t
#include <stddef.h>

__BEGIN_DECLS

/* Bits set in the FLAGS argument to `wordexp'.  */
enum
  {
    WRDE_DOOFFS = (1 << 0),	/* Insert PWORDEXP->we_offs NULLs.  */
    WRDE_APPEND = (1 << 1),	/* Append to results of a previous call.  */
    WRDE_NOCMD = (1 << 2),	/* Don't do command substitution.  */
    WRDE_REUSE = (1 << 3),	/* Reuse storage in PWORDEXP.  */
    WRDE_SHOWERR = (1 << 4),	/* Don't redirect stderr to /dev/null.  */
    WRDE_UNDEF = (1 << 5),	/* Error for expanding undefined variables.  */
    __WRDE_FLAGS = (WRDE_DOOFFS | WRDE_APPEND | WRDE_NOCMD |
		    WRDE_REUSE | WRDE_SHOWERR | WRDE_UNDEF)
  };

/* Structure describing a word-expansion run.  */
typedef struct
  {
    size_t we_wordc;		/* Count of words matched.  */
    char **we_wordv;		/* List of expanded words.  */
    size_t we_offs;		/* Slots to reserve in `we_wordv'.  */
  } wordexp_t;

/* Possible nonzero return values from `wordexp'.  */
enum
  {
#ifdef __USE_XOPEN
    WRDE_NOSYS = -1,		/* Never used since we support `wordexp'.  */
#endif
    WRDE_NOSPACE = 1,		/* Ran out of memory.  */
    WRDE_BADCHAR,		/* A metachar appears in the wrong place.  */
    WRDE_BADVAL,		/* Undefined var reference with WRDE_UNDEF.  */
    WRDE_CMDSUB,		/* Command substitution with WRDE_NOCMD.  */
    WRDE_SYNTAX			/* Shell syntax error.  */
  };

/* Do word expansion of WORDS into PWORDEXP.  */
extern int wordexp (const char *__restrict __words,
		    wordexp_t *__restrict __pwordexp, int __flags);

/* Free the storage allocated by a `wordexp' call.  */
extern void wordfree (wordexp_t *__wordexp) __THROW;

__END_DECLS

#endif /* wordexp.h  */

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