def stop(module_name):
"""
Stop the *module_name* module.
"""
if not status(module_name):
raise RuntimeError('Module `%s` is not running' % module_name)
remove_file = False
pid = 0
pid_file = path.pid_file(module_name)
with open(pid_file, 'r') as f:
try:
pid = int(f.readline())
except ValueError:
remove_file = True
if pid != 0:
try:
os.kill(pid, signal.SIGTERM)
except OSError as e:
if e.errno == 3: # No such process
remove_file = True
else:
raise e
if remove_file:
os.remove(pid_file)
def stop(module_name):
"""
Stop the *module_name* module.
"""
if not status(module_name):
raise RuntimeError('Module `%s` is not running' % module_name)
remove_file = False
pid = 0
pid_file = path.pid_file(module_name)
with open(pid_file, 'r') as f:
try:
pid = int(f.readline())
except ValueError:
remove_file = True
if pid != 0:
try:
os.kill(pid, signal.SIGTERM)
except OSError as e:
if e.errno == 3: # No such process
remove_file = True
else:
raise e
if remove_file:
os.remove(pid_file)
def status(module_name):
"""
Return the status of the module *module_name*
A module is considered as running if its pid file exists.
Return true if the module is running else false.
"""
pid_file = path.pid_file(module_name)
return os.path.exists(pid_file)
def status(module_name):
"""
Return the status of the module *module_name*
A module is considered as running if its pid file exists.
Return true if the module is running else false.
"""
pid_file = path.pid_file(module_name)
return os.path.exists(pid_file)
def execm(module_name, daemonize=True):
"""
Start a new module identified by its name *module_name*. The current
processus is killed at the end of the module when it's not a daemon. If it
is, the current processus is killed immediately. Use *invoke*
instead if you want to create a new killable process.
"""
child_proc = None
def signal_handler(signum, frame):
"""
Signal handler. If no child was created, it does nothing.
Else, it broadcasts the signal to the child.
"""
logger.info('Received signal %s, broadcasting it to child' % signum)
if child_proc is not None:
child_proc.send_signal(signum)
child_proc.wait()
# Check that only one instance is running at the same time
pid_file = path.pid_file(module_name)
if os.path.exists(pid_file):
raise RuntimeError('A pid file already exists for this module')
sys.exit(1)
# Get the start command from the configuration file
module_config = packaging.get_config(module_name)
if not 'start' in module_config:
raise RuntimeError(
'Missing "start" entry in the module\'s configuration file')
sys.exit(1)
start_cmd = module_config['start']
# Add our bin directory to the PATH variable
os.environ['PATH'] = path.bin_directory() + ':' + os.environ['PATH']
# Daemon or not Daemon ?
if daemonize:
# Create a daemon
daemon.possess_me()
# Redirect stdout and stderr into a log file
sys.stdout = open(path.log_file(module_name), 'a')
sys.stderr = sys.stdout
# Change the directory to the module directory
os.chdir(path.module_directory(module_name))
# Prepare to receive signal SIGINT and SIGTERM
signal.signal(signal.SIGINT, signal_handler)
signal.signal(signal.SIGTERM, signal_handler)
return_code = 0
try:
# Write the new daemon pid in a new file
with open(pid_file, 'w') as f:
f.write(str(os.getpid()))
f.flush()
except (OSError, IOError) as e:
return_code = 1
else:
# Execute the start command
logger.info('Starting the module `%s`', module_name)
try:
child_proc = sp.Popen(shlex.split(start_cmd))
except OSError as e:
logger.exception(e)
return_code = 1
else:
return_code = child_proc.wait()
finally:
# Remove the pid file and return the corresponding code
logger.info('Shutting down the module `%s`', module_name)
os.remove(pid_file)
sys.exit(return_code)
sys.exit(0)
def execm(module_name, daemonize=True):
"""
Start a new module identified by its name *module_name*. The current
processus is killed at the end of the module when it's not a daemon. If it
is, the current processus is killed immediately. Use *invoke*
instead if you want to create a new killable process.
"""
child_proc = None
def signal_handler(signum, frame):
"""
Signal handler. If no child was created, it does nothing.
Else, it broadcasts the signal to the child.
"""
logger.info('Received signal %s, broadcasting it to child' % signum)
if child_proc is not None:
child_proc.send_signal(signum)
child_proc.wait()
# Check that only one instance is running at the same time
pid_file = path.pid_file(module_name)
if os.path.exists(pid_file):
raise RuntimeError('A pid file already exists for this module')
sys.exit(1)
# Get the start command from the configuration file
module_config = packaging.get_config(module_name)
if not 'start' in module_config:
raise RuntimeError(
'Missing "start" entry in the module\'s configuration file')
sys.exit(1)
start_cmd = module_config['start']
# Add our bin directory to the PATH variable
os.environ['PATH'] = path.bin_directory() + ':' + os.environ['PATH']
# Daemon or not Daemon ?
if daemonize:
# Create a daemon
daemon.possess_me()
# Redirect stdout and stderr into a log file
sys.stdout = open(path.log_file(module_name), 'a')
sys.stderr = sys.stdout
# Change the directory to the module directory
os.chdir(path.module_directory(module_name))
# Prepare to receive signal SIGINT and SIGTERM
signal.signal(signal.SIGINT, signal_handler)
signal.signal(signal.SIGTERM, signal_handler)
return_code = 0
try:
# Write the new daemon pid in a new file
with open(pid_file, 'w') as f:
f.write(str(os.getpid()))
f.flush()
except (OSError, IOError) as e:
return_code = 1
else:
# Execute the start command
logger.info('Starting the module `%s`', module_name)
try:
child_proc = sp.Popen(shlex.split(start_cmd))
except OSError as e:
logger.exception(e)
return_code = 1
else:
return_code = child_proc.wait()
finally:
# Remove the pid file and return the corresponding code
logger.info('Shutting down the module `%s`', module_name)
os.remove(pid_file)
sys.exit(return_code)
sys.exit(0)
