/usr/share/debomatic/Debomatic/process.py is in debomatic 0.21-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 | # Deb-o-Matic
#
# Copyright (C) 2011-2015 Luca Falavigna
#
# Author: Luca Falavigna <dktrkranz@debian.org>
#
# 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; version 3 of the License.
#
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
import os
from concurrent.futures import as_completed, ThreadPoolExecutor
from atexit import register as on_exit
from fcntl import flock, LOCK_EX, LOCK_NB, LOCK_UN
from hashlib import sha256
from logging import basicConfig as log, debug, error, getLogger, info
from signal import signal, SIGINT, SIGTERM
from sys import stdin, stdout, stderr
from time import sleep
from Debomatic import dom
from .exceptions import DebomaticError
class Process:
def __init__(self):
pass
def _daemonize(self):
try:
pid = os.fork()
if pid > 0:
exit()
except OSError as e:
error(_('Error entering daemon mode: %s') % e.strerror)
exit()
os.chdir('/')
os.setsid()
os.umask(0)
stdout.flush()
stderr.flush()
si = open(os.devnull, 'r')
so = open(os.devnull, 'a+')
se = open(os.devnull, 'a+')
os.dup2(si.fileno(), stdin.fileno())
os.dup2(so.fileno(), stdout.fileno())
os.dup2(se.fileno(), stderr.fileno())
on_exit(self._quit)
old_log = getLogger()
if old_log.handlers:
for handler in old_log.handlers:
old_log.removeHandler(handler)
log(filename=self.logfile, level=self.loglevel,
format='%(asctime)s %(levelname)-8s %(message)s')
self._set_pid()
def _get_pid(self):
self.pidfile = ('/var/run/debomatic-%s' %
self._sha256(self.incoming))
try:
with open(self.pidfile, 'r') as fd:
self.pid = int(fd.read().strip())
except (IOError, ValueError):
self.pid = None
def _lock(self, wait=False):
self.fd = None
self.lockfile = ('/var/run/debomatic-%s.lock' %
self._sha256(self.incoming))
try:
self.fd = open(self.lockfile, 'w')
flags = LOCK_EX if wait else LOCK_EX | LOCK_NB
flock(self.fd, flags)
except (OSError, IOError) as ex:
if self.fd:
self.fd.close()
raise ex
def _notify_systemd(self):
try:
import systemd.daemon
systemd.daemon.notify('READY=1')
except (ImportError, SystemError):
pass
def _quit(self, signum=None, frame=None):
info(_('Waiting for threads to complete...'))
dom.pool.shutdown()
self.mod_sys.execute_hook('on_quit')
self._unlock()
os.unlink(self.pidfile)
exit()
def _set_pid(self):
self.pidfile = ('/var/run/debomatic-%s' %
self._sha256(self.incoming))
pid = str(os.getpid())
with open(self.pidfile, 'w+') as fd:
fd.write('%s\n' % pid)
def _sha256(self, value):
lock_sha = sha256()
lock_sha.update(value.encode('utf-8'))
return lock_sha.hexdigest()
def _unlock(self):
if self.fd:
flock(self.fd, LOCK_UN)
self.fd.close()
self.fd = None
if os.path.isfile(self.lockfile):
os.unlink(self.lockfile)
def shutdown(self):
self._get_pid()
if not self.pid:
return
info(_('Waiting for threads to complete...'))
try:
os.kill(self.pid, SIGTERM)
self._lock(wait=True)
except OSError as err:
err = str(err)
if err.find('No such process') > 0:
if os.path.exists(self.pidfile):
os.unlink(self.pidfile)
else:
error(err)
def startup(self):
try:
self._lock()
except (OSError, IOError):
error(_('Another instance is running, aborting'))
raise DebomaticError
self._set_pid()
signal(SIGINT, self._quit)
signal(SIGTERM, self._quit)
if self.daemonize:
self._daemonize()
self._notify_systemd()
self.launcher()
class ModulePool:
def __init__(self, workers=1):
self._jobs = {}
self._pool = ThreadPoolExecutor(workers)
def _launch(self, func, hook, dependencies):
if dependencies:
for dependency in dependencies:
while True:
if dependency in self._jobs.keys():
self._jobs[dependency].result()
break
else:
sleep(0.1)
func(hook)
def schedule(self, func, hook):
innerfunc, args, module, hookname, dependencies = hook
job = self._pool.submit(self._launch, func, hook, dependencies)
self._jobs[module] = job
def shutdown(self):
for job in as_completed([self._jobs[j] for j in self._jobs]):
job.result()
self._pool.shutdown()
class ThreadPool:
def __init__(self, workers=1):
self._jobs = []
self._pool = ThreadPoolExecutor(workers)
def _finish(self, job):
try:
self._jobs.remove(job)
except ValueError:
pass
try:
e = job.exception()
if e:
raise e
except Exception as e:
debug(str(e), exc_info=True)
def schedule(self, func):
job = self._pool.submit(func)
job.add_done_callback(self._finish)
self._jobs.append(job)
def shutdown(self):
for job in as_completed(self._jobs):
job.result()
self._pool.shutdown()
|