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|
#! %%PYTHON_CMD%%
################################################################################
# Author: Jean-Baptiste Quenot <jb.quenot@caraldi.com>
# Purpose: Control cocoon process
# Date Created: 2004-05-04 11:14:05
# Revision: $FreeBSD$
################################################################################
# Copyright (c) 2004, Jean-Baptiste Quenot <jb.quenot@caraldi.com>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
# * The name of the contributors may not be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
################################################################################
#
# Files handled by this script (pid file, log files) must reside in a writable
# directory, ie the directory must be owned by the user running the program.
import sys, os, signal, time, stat, re
def readProcessId():
f = open(PID_FILE, 'r')
pid = int(f.readline())
f.close()
return pid
def isProgramRunning(pid):
# Send a dummy signal to the process. If it died, an exception is
# thrown
try:
os.kill(pid, signal.SIGCONT)
return 1
except OSError:
return 0
def usage():
print >> sys.stderr, "Usage: %s {start|stop|restart}" % sys.argv[0]
def start():
cwd = os.getcwd()
if os.path.exists(PID_FILE):
# Read the process id
pid = readProcessId()
if isProgramRunning(pid):
print >> sys.stderr, '%s already started' % APP_NAME
sys.exit(3)
if not(os.path.exists(COMMAND)):
print >> sys.stderr, '%s cannot be found' % COMMAND
sys.exit(3)
# Append program output to a log file
l = open(LOG_FILE, 'a')
orig_stderr = os.dup(sys.stderr.fileno())
os.dup2(l.fileno(), sys.stdout.fileno())
os.dup2(l.fileno(), sys.stderr.fileno())
finfo = os.stat(COMMAND)[stat.ST_MODE]
executable = stat.S_IMODE(finfo) & 0111
if not(executable):
sys.stderr = os.fdopen(orig_stderr, 'w')
print >> sys.stderr, 'Cannot run %s, execute bit is missing' % COMMAND
sys.exit(5)
if APP_HOME:
# Change current directory to APP_HOME
os.chdir(APP_HOME)
# Start program in the background
pid = os.spawnv(os.P_NOWAIT, COMMAND, ARGS)
# Wait a little
time.sleep(.4)
(status_pid, status) = os.waitpid(pid, os.WNOHANG)
# Check program exit status, if available
if status_pid != 0 and os.WIFEXITED(status):
sys.stderr = os.fdopen(orig_stderr, 'w')
print >> sys.stderr, 'Could not start %s. Check %s for errors.' % (APP_NAME, LOG_FILE)
sys.exit(2)
# It's alive, so write down the process id
os.chdir(cwd)
f = open(PID_FILE, 'w')
print >> f, pid
f.close()
def warnNotRunning():
if sys.argv[1] == "stop":
print >> sys.stderr, '%s is not running' % APP_NAME
else:
print >> sys.stderr, 'Warning: %s was not running' % APP_NAME
def cleanup():
os.unlink(PID_FILE)
def stop():
if os.path.exists(PID_FILE):
# Read the process id
pid = readProcessId()
else:
warnNotRunning()
return
if not(isProgramRunning(pid)):
warnNotRunning()
cleanup()
return
# Terminate program
os.kill(pid, signal.SIGTERM)
while isProgramRunning(pid):
time.sleep(.1)
cleanup()
if __name__ == '__main__':
LOG_FILE = "%%LOG_FILE%%"
APP_NAME = "%%APP_NAME%%"
APP_HOME = "%%APP_HOME%%"
PID_FILE = "%%PID_FILE%%"
COMMAND = "%%APP_HOME%%/cocoon.sh"
os.environ["JAVA_OPTIONS"] = " ".join(sys.argv[1:-1])
ARGS = [COMMAND, "servlet"]
if len(sys.argv) < 2:
usage()
sys.exit(1)
if sys.argv[-1] == "start":
start()
elif sys.argv[-1] == "stop":
stop()
elif sys.argv[-1] == "restart":
stop()
start()
else:
usage()
sys.exit(1)
|
