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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DIR:/proc/thread-self/root/lib/dracut/modules.d/06dbus-daemon/
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Current File : //proc/thread-self/root/lib/dracut/modules.d/06dbus-daemon/module-setup.sh
#!/usr/bin/bash
# This file is part of dracut.
# SPDX-License-Identifier: GPL-2.0-or-later

# Prerequisite check(s) for module.
check() {

    # If the binary(s) requirements are not fulfilled the module can't be installed
    require_binaries busctl || return 1
    require_binaries dbus-daemon || return 1
    require_binaries dbus-send || return 1

    # Return 255 to only include the module, if another module requires it.
    return 255
}

# Module dependency requirements.
depends() {

    # This module has external dependency on the systemd module.
    echo systemd
    # Return 0 to include the dependent systemd module in the initramfs.
    return 0
}

# Install the required file(s) and directories for the module in the initramfs.
install() {
    # dbus conflicts with dbus-broker.
    if dracut_module_included "dbus-broker"; then
        derror "dbus conflicts with dbus-broker in the initramfs."
        return 1
    fi

    # Create dbus related directories.
    inst_dir "$dbus"
    inst_dir "$dbusinterfaces"
    inst_dir "$dbusservices"
    inst_dir "$dbussession"
    inst_dir "$dbussystem"
    inst_dir "$dbussystemservices"
    inst_dir "$dbusconfdir"
    inst_dir "$dbusinterfacesconfdir"
    inst_dir "$dbusservicesconfdir"
    inst_dir "$dbussessionconfdir"
    inst_dir "$dbussystemconfdir"
    inst_dir "$dbussystemservicesconfdir"

    inst_multiple -o \
        "$dbus"/system.conf \
        "$dbussystem"/org.freedesktop.systemd1.conf \
        "$dbusservicesconfdir"/org.freedesktop.systemd1.service \
        "$dbussystemservices"/org.freedesktop.systemd1.service \
        "$systemdsystemunitdir"/dbus.service \
        "$systemdsystemunitdir"/dbus.socket \
        "$systemdsystemunitdir"/dbus.target.wants \
        busctl dbus-send dbus-daemon

    # Adjusting dependencies for initramfs in the dbus service unit.
    # shellcheck disable=SC1004
    sed -i -e \
        '/^\[Unit\]/aDefaultDependencies=no\
        Conflicts=shutdown.target\
        Before=shutdown.target' \
        "$initdir$systemdsystemunitdir/dbus.service"

    # Adjusting dependencies for initramfs in the dbus socket unit.
    # shellcheck disable=SC1004
    sed -i -e \
        '/^\[Unit\]/aDefaultDependencies=no\
        Conflicts=shutdown.target\
        Before=shutdown.target
        /^\[Socket\]/aRemoveOnStop=yes' \
        "$initdir$systemdsystemunitdir/dbus.socket"

    # Adding the user and group for dbus
    grep '^\(d\|message\)bus:' "$dracutsysrootdir"/etc/passwd >> "$initdir/etc/passwd"
    grep '^\(d\|message\)bus:' "$dracutsysrootdir"/etc/group >> "$initdir/etc/group"

    # Install the hosts local user configurations if enabled.
    if [[ $hostonly ]]; then
        inst_multiple -H -o \
            "$dbusconfdir"/system.conf \
            "$systemdsystemconfdir"/dbus.socket \
            "$systemdsystemconfdir"/dbus.socket.d/*.conf \
            "$systemdsystemconfdir"/dbus.service \
            "$systemdsystemconfdir"/dbus.service.d/*.conf
    fi

    # We need to make sure that systemd-tmpfiles-setup.service->dbus.socket
    # will not wait for local-fs.target to start if swap is encrypted,
    # this would make dbus wait the timeout for the swap before loading.
    # This could delay sysinit services that are dependent on dbus.service.
    sed -i -Ee \
        '/^After/s/(After[[:space:]]*=.*)(local-fs.target[[:space:]]*)(.*)/\1-\.mount \3/' \
        "$initdir$systemdsystemunitdir/systemd-tmpfiles-setup.service"
}