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。 sh-3ll

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Current File : //proc/self/root/proc/thread-self/root/usr/include/bits/ipc-perm.h
/* struct ipc_perm definition.
   Copyright (C) 2019-2021 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 _SYS_IPC_H
# error "Never use <bits/ipc-perm.h> directly; include <sys/ipc.h> instead."
#endif

/* Data structure used to pass permission information to IPC operations.
   It follows the kernel ipc64_perm size so the syscall can be made directly
   without temporary buffer copy.  However, since glibc defines the MODE
   field as mode_t per POSIX definition (BZ#18231), it omits the __PAD1 field
   (since glibc does not export mode_t as 16-bit for any architecture).  */
struct ipc_perm
{
  __key_t __key;				/* Key.  */
  __uid_t uid;					/* Owner's user ID.  */
  __gid_t gid;					/* Owner's group ID.  */
  __uid_t cuid;					/* Creator's user ID.  */
  __gid_t cgid;					/* Creator's group ID.  */
  __mode_t mode;				/* Read/write permission.  */
  unsigned short int __seq;			/* Sequence number.  */
  unsigned short int __pad2;
  __syscall_ulong_t __glibc_reserved1;
  __syscall_ulong_t __glibc_reserved2;
};