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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Current File : //usr/include/linux/resource.h
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _LINUX_RESOURCE_H
#define _LINUX_RESOURCE_H

#include <linux/time.h>
#include <linux/types.h>

/*
 * Resource control/accounting header file for linux
 */

/*
 * Definition of struct rusage taken from BSD 4.3 Reno
 * 
 * We don't support all of these yet, but we might as well have them....
 * Otherwise, each time we add new items, programs which depend on this
 * structure will lose.  This reduces the chances of that happening.
 */
#define	RUSAGE_SELF	0
#define	RUSAGE_CHILDREN	(-1)
#define RUSAGE_BOTH	(-2)		/* sys_wait4() uses this */
#define	RUSAGE_THREAD	1		/* only the calling thread */

struct	rusage {
	struct timeval ru_utime;	/* user time used */
	struct timeval ru_stime;	/* system time used */
	__kernel_long_t	ru_maxrss;	/* maximum resident set size */
	__kernel_long_t	ru_ixrss;	/* integral shared memory size */
	__kernel_long_t	ru_idrss;	/* integral unshared data size */
	__kernel_long_t	ru_isrss;	/* integral unshared stack size */
	__kernel_long_t	ru_minflt;	/* page reclaims */
	__kernel_long_t	ru_majflt;	/* page faults */
	__kernel_long_t	ru_nswap;	/* swaps */
	__kernel_long_t	ru_inblock;	/* block input operations */
	__kernel_long_t	ru_oublock;	/* block output operations */
	__kernel_long_t	ru_msgsnd;	/* messages sent */
	__kernel_long_t	ru_msgrcv;	/* messages received */
	__kernel_long_t	ru_nsignals;	/* signals received */
	__kernel_long_t	ru_nvcsw;	/* voluntary context switches */
	__kernel_long_t	ru_nivcsw;	/* involuntary " */
};

struct rlimit {
	__kernel_ulong_t	rlim_cur;
	__kernel_ulong_t	rlim_max;
};

#define RLIM64_INFINITY		(~0ULL)

struct rlimit64 {
	__u64 rlim_cur;
	__u64 rlim_max;
};

#define	PRIO_MIN	(-20)
#define	PRIO_MAX	20

#define	PRIO_PROCESS	0
#define	PRIO_PGRP	1
#define	PRIO_USER	2

/*
 * Limit the stack by to some sane default: root can always
 * increase this limit if needed..  8MB seems reasonable.
 */
#define _STK_LIM	(8*1024*1024)

/*
 * GPG2 wants 64kB of mlocked memory, to make sure pass phrases
 * and other sensitive information are never written to disk.
 */
#define MLOCK_LIMIT	((PAGE_SIZE > 64*1024) ? PAGE_SIZE : 64*1024)

/*
 * Due to binary compatibility, the actual resource numbers
 * may be different for different linux versions..
 */
#include <asm/resource.h>


#endif /* _LINUX_RESOURCE_H */

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