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|
import os
import sys
import time
import signal
from select import select
from subprocess import *
from consts import *
from configured import *
DEFAULT_DELAY = 2
DEFAULT_PID_LOCATIONS = [
'/var/run/cherokee.pid',
os.path.join (PREFIX, 'var/run/cherokee.pid')
]
CHEROKEE_MIN_DEFAULT_CONFIG = """# Default configuration
server!pid_file = %s
vserver!default!document_root = /tmp
vserver!default!directory!/!handler = common
vserver!default!directory!/!priority = 1
""" % (DEFAULT_PID_LOCATIONS[0])
# Cherokee Management 'factory':
#
cherokee_management = None
def cherokee_management_get (cfg):
global cherokee_management
# Fast path
if cherokee_management:
return cherokee_management
# Needs to create a new object
cherokee_management = CherokeeManagement(cfg)
return cherokee_management
def cherokee_management_reset ():
global cherokee_management
cherokee_management = None
# Cherokee Management class
#
class CherokeeManagement:
def __init__ (self, cfg):
self._cfg = cfg
self._pid = self._get_guardian_pid()
# Public
#
def save (self, restart=True):
self._cfg.save()
if restart:
self._restart()
def is_alive (self):
if not self._pid:
return False
return is_PID_alive (self._pid)
def launch (self):
def daemonize():
os.setsid()
p = Popen ([CHEROKEE_GUARDIAN, '-C', self._cfg.file],
stdout=PIPE, stderr=PIPE,
preexec_fn=daemonize, close_fds=True)
stdout_f, stderr_f = (p.stdout, p.stderr)
stdout_fd, stderr_fd = stdout_f.fileno(), stderr_f.fileno()
stdout, stderr = '', ''
while True:
r,w,e = select([stdout_fd, stderr_fd], [], [stdout_fd, stderr_fd], 1)
if e:
self._pid = None
return "Could access file descriptors: " + str(e)
if stdout_fd in r:
stdout += stdout_f.read(1)
if stderr_fd in r:
stderr += stderr_f.read(1)
if stderr.count('\n'):
self.__stop_process (p.pid)
self._pid = None
return stderr
if stdout.count('\n') > 1:
break
self._pid = p.pid
time.sleep (DEFAULT_DELAY)
return None
def stop (self):
# Stop Cherokee Guardian
self.__stop_process (self._pid)
self._pid = None
# Get the PID
pid = self._get_cherokee_pid()
if not pid: return
# Stop Cherokee
self.__stop_process (pid)
time.sleep (DEFAULT_DELAY)
def create_config (self, file):
if os.path.exists (file):
return
dirname = os.path.dirname(file)
if not os.path.exists (dirname):
os.mkdir (dirname)
conf_sample = os.path.join(CHEROKEE_ADMINDIR, "cherokee.conf.sample")
if os.path.exists (conf_sample):
content = open(conf_sample, 'r').read()
else:
content = CHEROKEE_MIN_DEFAULT_CONFIG
f = open(file, 'w+')
f.write (content)
f.close()
# Protected
#
def _get_guardian_pid (self):
pid_file = os.path.join (CHEROKEE_VAR_RUN, "cherokee-guardian.pid")
return self.__read_pid_file (pid_file)
def _get_cherokee_pid (self):
pid_file = self._cfg.get_val("server!pid_file")
if not pid_file:
pid_file = os.path.join (CHEROKEE_VAR_RUN, "cherokee-guardian.pid")
return self.__read_pid_file (pid_file)
def _restart (self):
if not self._pid:
return
try:
os.kill (self._pid, signal.SIGUSR1)
except:
pass
# Private
#
def __read_pid_file (self, file):
if not os.access (file, os.R_OK):
return
f = open (file, "r")
try:
pid = int(f.readline())
except:
return None
try: f.close()
except: pass
return pid
def __stop_process (self, pid):
if not pid:
return
try: os.kill (pid, signal.SIGQUIT)
except: pass
try: os.waitpid (pid, 0)
except: pass
def is_PID_alive (pid):
if sys.platform.startswith('linux') or \
sys.platform.startswith('sunos'):
return os.path.exists('/proc/%s'%(pid))
elif sys.platform == 'darwin' or \
"bsd" in sys.platform.lower():
f = os.popen('/bin/ps -p %s'%(pid))
alive = len(f.readlines()) >= 2
try:
f.close()
except: pass
return alive
elif sys.platform == 'win32':
None
raise 'TODO'
|
