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 : //sbin/fsck.xfs
#!/bin/sh -f
#
# Copyright (c) 2006 Silicon Graphics, Inc.  All Rights Reserved.
#

NAME=$0

# get the right return code for fsck
repair2fsck_code() {
	case $1 in
	0)  return 0 # everything is ok
		;;
	1)  echo "$NAME error: xfs_repair could not fix the filesystem." 1>&2
		return 4 # errors left uncorrected
		;;
	2)  echo "$NAME error: The filesystem log is dirty, mount it to recover" \
		     "the log. If that fails, refer to the section DIRTY LOGS in the" \
		     "xfs_repair manual page." 1>&2
		return 4 # dirty log, don't do anything and let the user solve it
		;;
	4)  return 1 # The fs has been fixed
		;;
	127)
		echo "$NAME error: xfs_repair was not found!" 1>&2
		return 4
		;;
	*)  echo "$NAME error: An unknown return code from xfs_repair '$1'" 1>&2
		return 4 # something went wrong with xfs_repair
	esac
}

AUTO=false
FORCE=false
while getopts ":aApyf" c
do
	case $c in
	a|A|p|y)	AUTO=true;;
	f)      	FORCE=true;;
	esac
done
eval DEV=\${$#}
if [ ! -e $DEV ]; then
	echo "$0: $DEV does not exist"
	exit 8
fi

# The flag -f is added by systemd/init scripts when /forcefsck file is present
# or fsck.mode=force is used during boot; an unclean shutdown won't trigger
# this check, user has to explicitly require a forced fsck.
# But first of all, test if it is a non-interactive session.
# Invoking xfs_repair via fsck.xfs is only intended to happen via initscripts.
# Normal administrative filesystem repairs should always invoke xfs_repair
# directly.
#
# Use multiple methods to capture most of the cases:
# The case for *i* and -n "$PS1" are commonly suggested in bash manual
# and the -t 0 test checks stdin
case $- in
	*i*) FORCE=false ;;
esac
if [ -n "$PS1" -o -t 0 ]; then
	FORCE=false
fi

if $FORCE; then
	xfs_repair -e $DEV
	repair2fsck_code $?
	exit $?
fi

if $AUTO; then
	echo "$0: XFS file system."
else
	echo "If you wish to check the consistency of an XFS filesystem or"
	echo "repair a damaged filesystem, see xfs_repair(8)."
fi
exit 0

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