Patch PasteScript to support safe termination of daemon threads

buildout.cfg

[buildout]
eggs = ...
parts = ...
        pastescript

[pastescript]
recipe = zc.recipe.egg
eggs = PasteScript      # required to generate the specific paster script if not already in eggs list
       ${buildout:eggs}
extra-paths = path/to/pastescriptpatches.py
scripts = paster
initialization = import pastescriptpatches

pastescriptpatches.py

import os
import time

from paste.script.serve import live_pidfile
from paste.script.serve import read_pidfile

def patched_stop_daemon(self):
    pid_file = self.options.pid_file or 'paster.pid'
    if not os.path.exists(pid_file):
        print 'No PID file exists in %s' % pid_file
        return 1
    pid = read_pidfile(pid_file)
    if not pid:
        print "Not a valid PID file in %s" % pid_file
        return 1
    pid = live_pidfile(pid_file)
    if not pid:
        print "PID in %s is not valid (deleting)" % pid_file
        try:
            os.unlink(pid_file)
        except (OSError, IOError), e:
            print "Could not delete: %s" % e
            return 2
        return 1
    for j in range(10):
        if not live_pidfile(pid_file):
            break
        import signal
        os.kill(pid, signal.SIGINT)
        time.sleep(1)
    for j in range(10):
        if not live_pidfile(pid_file):
            break
        import signal
        os.kill(pid, signal.SIGTERM)
        time.sleep(1)
    else:
        print "failed to kill web process %s" % pid
        return 3
    if os.path.exists(pid_file):
        os.unlink(pid_file)
    return 0


from paste.script.serve import ServeCommand
ServeCommand.stop_daemon__old__ = ServeCommand.stop_daemon
ServeCommand.stop_daemon = patched_stop_daemon