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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#!/usr/bin/sh

# Licensed under the GPLv2
#
# Copyright (C) 2011 Politecnico di Torino, Italy
#                    TORSEC group -- http://security.polito.it
# Roberto Sassu <roberto.sassu@polito.it>

IMASECDIR="${SECURITYFSDIR}/ima"
IMACONFIG="${NEWROOT}/etc/sysconfig/ima"
IMAPOLICY="/etc/sysconfig/ima-policy"

load_ima_policy() {
    # check kernel support for IMA
    if [ ! -e "${IMASECDIR}" ]; then
        if [ "${RD_DEBUG}" = "yes" ]; then
            info "integrity: IMA kernel support is disabled"
        fi
        return 0
    fi

    # override the default configuration
    # shellcheck disable=SC1090
    [ -f "${IMACONFIG}" ] \
        && . "${IMACONFIG}"

    # set the IMA policy path name
    IMAPOLICYPATH="${NEWROOT}${IMAPOLICY}"

    # check the existence of the IMA policy file
    [ -f "${IMAPOLICYPATH}" ] && {
        info "Loading the provided IMA custom policy"
        printf '%s' "${IMAPOLICYPATH}" > "${IMASECDIR}"/policy \
            || cat "${IMAPOLICYPATH}" > "${IMASECDIR}"/policy
    }

    return 0
}

load_ima_policy