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# ========================================================================== #
# #
# KVMD - The main Pi-KVM daemon. #
# #
# Copyright (C) 2018 Maxim Devaev <[email protected]> #
# #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation, either version 3 of the License, or #
# (at your option) any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program. If not, see <https://www.gnu.org/licenses/>. #
# #
# ========================================================================== #
import os
import signal
import time
from typing import List
from typing import Optional
import psutil
from ...logging import get_logger
from ...yamlconf import Section
from ... import gpio
from .. import init
# =====
def _clear_gpio(config: Section) -> None:
logger = get_logger(0)
with gpio.bcm():
for (name, pin) in [
*([
("hid_serial/reset", config.hid.reset_pin),
] if config.hid.type == "serial" else []),
*([
("atx_gpio/power_switch", config.atx.power_switch_pin),
("atx_gpio/reset_switch", config.atx.reset_switch_pin),
] if config.atx.type == "gpio" else []),
*([
("msd_relay/target", config.msd.target_pin),
("msd_relay/reset", config.msd.reset_pin),
] if config.msd.type == "relay" else []),
("streamer/cap", config.streamer.cap_pin),
("streamer/conv", config.streamer.conv_pin),
# *([
# (f"gpio/{channel}", params.pin)
# for (channel, params) in config.gpio.scheme.items()
# if params.mode == "output"
# ]),
]:
if pin >= 0:
logger.info("Writing 0 to GPIO pin=%d (%s)", pin, name)
try:
gpio.set_output(pin, False)
except Exception:
logger.exception("Can't clear GPIO pin=%d (%s)", pin, name)
def _kill_streamer(config: Section) -> None:
logger = get_logger(0)
if config.streamer.process_name_prefix:
prefix = config.streamer.process_name_prefix + ":"
logger.info("Trying to find and kill the streamer %r ...", prefix + " <app>")
for proc in psutil.process_iter():
attrs = proc.as_dict(attrs=["name"])
if attrs.get("name", "").startswith(prefix):
try:
proc.send_signal(signal.SIGTERM)
except Exception:
logger.exception("Can't send SIGTERM to streamer with pid=%d", proc.pid)
time.sleep(3)
if proc.is_running():
try:
proc.send_signal(signal.SIGKILL)
except Exception:
logger.exception("Can't send SIGKILL to streamer with pid=%d", proc.pid)
def _remove_sockets(config: Section) -> None:
logger = get_logger(0)
for (owner, unix_path) in [
("KVMD", config.server.unix),
("streamer", config.streamer.unix),
]:
if unix_path and os.path.exists(unix_path):
logger.info("Removing %s socket %r ...", owner, unix_path)
try:
os.remove(unix_path)
except Exception: # pragma: nocover
logger.exception("Can't remove %s socket %r", owner, unix_path)
# =====
def main(argv: Optional[List[str]]=None) -> None:
config = init(
prog="kvmd-cleanup",
description="Kill KVMD and clear resources",
argv=argv,
load_hid=True,
load_atx=True,
load_msd=True,
load_gpio=True,
)[2].kvmd
logger = get_logger(0)
logger.info("Cleaning up ...")
for method in [
_clear_gpio,
_kill_streamer,
_remove_sockets,
]:
try:
method(config)
except Exception:
pass
logger.info("Bye-bye")
|
