Onionr/src/onionrcommands/restartonionr.py

"""Onionr - Private P2P Communication.

Command to restart Onionr
"""
from threading import local
import time
import os
import subprocess  # nosec

from psutil import Process

from etc import onionrvalues
from etc import cleanup
from onionrutils import localcommand
import logger
import filepaths

from . import daemonlaunch
"""
    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/>.
"""

DEVNULL = subprocess.DEVNULL
SCRIPT_NAME = os.path.dirname(os.path.realpath(
    __file__)) + f'/../../{onionrvalues.SCRIPT_NAME}'


def restart():
    """Tell the Onionr daemon to restart."""

    logger.info('Restarting Onionr', terminal=True)

    daemon_terminal = localcommand.local_command("getpid")
    terminal = None
    if daemon_terminal:
        terminal = Process(int(daemon_terminal)).terminal()
    else:
        terminal = Process().terminal()

    # On platforms where we can, fork out to prevent locking
    try:
        pid = os.fork()
        if pid != 0:
            return
    except (AttributeError, OSError):
        logger.warn('Could not fork on restart')
    with open(filepaths.restarting_indicator, 'w') as f:
        f.write('t')
    daemonlaunch.kill_daemon()
    while localcommand.local_command('ping', max_wait=8) == 'pong!':
        time.sleep(0.3)
    time.sleep(15)
    while (os.path.exists(filepaths.private_API_host_file) or
           (os.path.exists(filepaths.daemon_mark_file))):
        time.sleep(1)

    cleanup.delete_run_files()

    with open(terminal, 'ab') as term:
        subprocess.Popen(
            [SCRIPT_NAME, 'start'],
            stdout=term,
            stdin=term,
            stderr=term)


restart.onionr_help = 'Gracefully restart Onionr'  # type: ignore