-
Notifications
You must be signed in to change notification settings - Fork 1
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Added options and daemon mode to Aaptos.py
Aaptos.py can be run in two ways: as a daemon or in the console. In both cases, the db logger can be started optionnally as a separate thread. In console mode, the client can be started as well.
- Loading branch information
Showing
2 changed files
with
198 additions
and
7 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,129 @@ | ||
import sys, os, time, atexit | ||
from signal import SIGTERM | ||
|
||
class Daemon: | ||
""" | ||
A generic daemon class. | ||
Original code by Sander Marechal (http://www.jejik.com/articles/2007/02/a_simple_unix_linux_daemon_in_python/) | ||
Usage: subclass the Daemon class and override the run() method | ||
""" | ||
def __init__(self, pidfile, stdin='/dev/null', stdout='/dev/null', stderr='/dev/null'): | ||
self.stdin = stdin | ||
self.stdout = stdout | ||
self.stderr = stderr | ||
self.pidfile = pidfile | ||
|
||
def daemonize(self): | ||
""" | ||
do the UNIX double-fork magic, see Stevens' "Advanced | ||
Programming in the UNIX Environment" for details (ISBN 0201563177) | ||
http://www.erlenstar.demon.co.uk/unix/faq_2.html#SEC16 | ||
""" | ||
try: | ||
pid = os.fork() | ||
if pid > 0: | ||
# exit first parent | ||
sys.exit(0) | ||
except OSError, e: | ||
sys.stderr.write("fork #1 failed: %d (%s)\n" % (e.errno, e.strerror)) | ||
sys.exit(1) | ||
|
||
# decouple from parent environment | ||
os.chdir("/") | ||
os.setsid() | ||
os.umask(0) | ||
|
||
# do second fork | ||
try: | ||
pid = os.fork() | ||
if pid > 0: | ||
# exit from second parent | ||
sys.exit(0) | ||
except OSError, e: | ||
sys.stderr.write("fork #2 failed: %d (%s)\n" % (e.errno, e.strerror)) | ||
sys.exit(1) | ||
|
||
# redirect standard file descriptors | ||
sys.stdout.flush() | ||
sys.stderr.flush() | ||
si = file(self.stdin, 'r') | ||
so = file(self.stdout, 'a+') | ||
se = file(self.stderr, 'a+', 0) | ||
os.dup2(si.fileno(), sys.stdin.fileno()) | ||
os.dup2(so.fileno(), sys.stdout.fileno()) | ||
os.dup2(se.fileno(), sys.stderr.fileno()) | ||
|
||
# write pidfile | ||
atexit.register(self.delpid) | ||
pid = str(os.getpid()) | ||
file(self.pidfile,'w+').write("%s\n" % pid) | ||
|
||
def delpid(self): | ||
os.remove(self.pidfile) | ||
|
||
def getpid(self): | ||
""" | ||
Check for a pidfile to see if the daemon already runs | ||
""" | ||
# Check for a pidfile to see if the daemon already runs | ||
try: | ||
pf = file(self.pidfile,'r') | ||
pid = int(pf.read().strip()) | ||
pf.close() | ||
except IOError: | ||
pid = None | ||
return pid | ||
|
||
def start(self): | ||
""" | ||
Start the daemon | ||
""" | ||
# Check for a pidfile to see if the daemon already runs | ||
if self.getpid(): | ||
message = "pidfile %s already exist. Daemon already running?\n" | ||
sys.stderr.write(message % self.pidfile) | ||
sys.exit(1) | ||
|
||
# Start the daemon | ||
self.daemonize() | ||
self.run() | ||
|
||
def stop(self): | ||
""" | ||
Stop the daemon | ||
""" | ||
# Get the pid from the pidfile | ||
pid = self.getpid() | ||
|
||
if not pid: | ||
message = "pidfile %s does not exist. Daemon not running?\n" | ||
sys.stderr.write(message % self.pidfile) | ||
return # not an error in a restart | ||
|
||
# Try killing the daemon process | ||
try: | ||
while 1: | ||
os.kill(pid, SIGTERM) | ||
time.sleep(0.1) | ||
except OSError, err: | ||
err = str(err) | ||
if err.find("No such process") > 0: | ||
if os.path.exists(self.pidfile): | ||
os.remove(self.pidfile) | ||
else: | ||
print str(err) | ||
sys.exit(1) | ||
|
||
def restart(self): | ||
""" | ||
Restart the daemon | ||
""" | ||
self.stop() | ||
self.start() | ||
|
||
def run(self): | ||
""" | ||
You should override this method when you subclass Daemon. It will be called after the process has been | ||
daemonized by start() or restart(). | ||
""" | ||
|