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/paperconfig
#! /bin/sh

# paperconfig: configuration of system paper name
#
# Copyright (C) 1996, Yves Arrouye <arrouye@debian.org>
#               2001, Adrian Bunk  <bunk@fs.tum.de>

usage() {
    if [ "$1" = -h ]
    then
	exec 1>&2
	echo -n U
    else
	echo -n u
    fi

    echo "sage: `basename $0` [ -v, --version ] [ -h, --help ] [ -p, --paper name | --force ]"

    if [ "$1" = -h ]
    then
	cat <<EOF

Options: -v, --verbose          print version information and exit
         -h, --help             print this help and exit
	 -p, --paper name	specify the paper to use
         --force                force paper configuration
EOF
	exit 0
    else
	exit 1
    fi
}

# "|| true" added below, to assure that the script does not fail even if
# called with bash -e. (MP 22/08/98)

unset PAPERSIZE || true 
: ${PAPERCONF:=/etc/papersize}
export PAPERCONF

unset PAPERDIR || true 
: ${PAPERDIR:=/etc/libpaper.d}
export PAPERDIR

force=0

if [ "$#" -eq 0 ]
  then
    usage
fi

while [ $# -ne 0 ]
do
    case "$1" in
	-v|--version)
	    echo "`basename $0` version 1.0" \
		"by Yves Arrouye <arrouye@debian.org>"
	    exit 0
	    ;;
	-h|--help)
	    usage -h
	    ;;
	-p|--paper)
	    test $# -gt 1 || usage
	    paper="$2"
	    shift
	    ;;
	--force)
	    force=1
	    ;;
	*)
	    usage
	    ;;
    esac
    shift
done

invalidpaper() {
    ! paperconf "$1" 2>/dev/null 1>&2
}

format() {
    _maxwidth=$1; shift
    _start="$1"; shift

    _cline=

    for w
    do
	if [ `echo "$_start$_cline$w " | wc -c` -ge 0$_maxwidth ]
	then
	    echo "$_cline"
	    _cline=
	    _start=
	fi
	_cline="$_cline$w "
    done

    if [ -n "$_cline" ]
    then
	echo "$_cline"
    fi

    unset _maxwidth _cline _start
}

# "chmod 644" added below, to assure that the conf file is created
# with the right access permissions (MP 13/05/2000)

setpaper() {
    paperright=`paperconf "$1" 2>/dev/null`

    ok=0

    if 2>/dev/null echo "$paperright" >${PAPERCONF}.new
    then
        if 2>/dev/null mv -f ${PAPERCONF}.new $PAPERCONF
	then
	    if 2>/dev/null chmod 644 $PAPERCONF
	    then
		ok=1
            fi
        fi
    fi

    if [ $ok -eq 0 ]
    then
        echo `basename $0`: cannot create $PAPERCONF
        exit 2
    else
	#
	# Added code for calling back applications when
	# papersize changes. See bug #345466
	# eppesuig@debian.org, 2006-01-05
	if [ -d ${PAPERDIR} ]
	then
	    run-parts ${PAPERDIR}
	fi
    fi
}

if [ ! -z "$paper" ]
then
    if invalidpaper $paper
    then
	>&2 echo `basename $0`: \"$paper\" is not a known paper name
	exit 3
    fi
    setpaper "$paper"
    exit 0
fi

knownpapers="`paperconf -a`"

prompt=
width=72

# "|| true" added below, to assure that the script does not fail even if 
# called with bash -e. (MP 22/08/98)

paper=`paperconf 2>/dev/null || true`
dftpaper=`paperconf -d`

if [ $force -eq 1 ] || [ ! -e $PAPERCONF ] || invalidpaper $paper
then
    papers="`format $width \"\" $knownpapers`"
    echo

    if [ -x /usr/bin/pager ]
    then
	: ${PAGER:=/usr/bin/pager}
    fi
    if [ -x /bin/more ]
    then
	: ${PAGER:=/bin/more}
    fi
    : ${PAGER:=cat}

    LESS="-X -E $LESS"
    export LESS

    (
	cat <<EOF
The default (also known as system) paper can be chosen from many known
papers that are currently recognized by programs using the libpaper
library (with libpaper, paper names are case insensitive; if you use
programs that use the system paper size but do not rely on the libpaper
library, this may not be true and some of the papers listed below may
not be known by these programs):

EOF
	echo "$papers" | sed 's/^/    /'
	echo
    ) | ${PAGER}

    : ${paper:=$dftpaper}

    echo -n "Default paper name? [$paper] "
    read ans
    : ${ans:=$paper}
    paper=$ans
fi

while invalidpaper "$paper"
do
    if [ -z "$paper" ]
    then
	echo "Please choose a paper from the available papers list."
    else
	echo "Unknow paper \"$paper\"," \
	    "please choose one from the available papers list."
    fi

    paper=$dftpaper

    echo -n "Default paper name? [$paper] "
    read ans
    paper=$ans
done

if [ "`paperconf 2>/dev/null`" != "$paper" ] || grep -q "[# 	]" $PAPERCONF
then
    setpaper "$paper"
fi

exit 0

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