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 : //proc/thread-self/root/lib/python3.6/site-packages/cloudinit/handlers/shell_script_by_frequency.py
import logging
import os

from cloudinit import util
from cloudinit.handlers import Handler
from cloudinit.settings import PER_ALWAYS, PER_INSTANCE, PER_ONCE

LOG = logging.getLogger(__name__)

# cloudinit/settings.py defines PER_*** frequency constants. It makes sense to
# use them here, instead of hardcodes, and map them to the 'per-***' frequency-
# specific folders in /v/l/c/scripts. It might make sense to expose this at a
# higher level or in a more general module -- eg maybe in cloudinit/settings.py
# itself -- but for now it's here.
path_map = {
    PER_ALWAYS: "per-boot",
    PER_INSTANCE: "per-instance",
    PER_ONCE: "per-once",
}


def get_mime_type_by_frequency(freq):
    mime_type = f"text/x-shellscript-{path_map[freq]}"
    return mime_type


def get_script_folder_by_frequency(freq, scripts_dir):
    """Return the frequency-specific subfolder for a given frequency constant
    and parent folder."""
    freqPath = path_map[freq]
    folder = os.path.join(scripts_dir, freqPath)
    return folder


def write_script_by_frequency(script_path, payload, frequency, scripts_dir):
    """Given a filename, a payload, a frequency, and a scripts folder, write
    the payload to the correct frequency-specific path"""
    filename = os.path.basename(script_path)
    filename = util.clean_filename(filename)
    folder = get_script_folder_by_frequency(frequency, scripts_dir)
    path = os.path.join(folder, filename)
    payload = util.dos2unix(payload)
    util.write_file(path, payload, 0o700)


class ShellScriptByFreqPartHandler(Handler):
    """Common base class for the frequency-specific script handlers."""

    def __init__(self, script_frequency, paths, **_kwargs):
        Handler.__init__(self, PER_ALWAYS)
        self.prefixes = [get_mime_type_by_frequency(script_frequency)]
        self.script_frequency = script_frequency
        self.scripts_dir = paths.get_cpath("scripts")
        if "script_path" in _kwargs:
            self.scripts_dir = paths.get_cpath(_kwargs["script_path"])

    def handle_part(self, data, ctype, script_path, payload, frequency):
        if script_path is not None:
            filename = os.path.basename(script_path)
            filename = util.clean_filename(filename)
            write_script_by_frequency(
                script_path, payload, self.script_frequency, self.scripts_dir
            )

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