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""" Trigger is a plugin that calls external scripts (on the server) """
import os
import pipes
import Bcfg2.Server.Plugin
from subprocess import Popen, PIPE
class TriggerFile(Bcfg2.Server.Plugin.FileBacked):
""" Representation of a trigger script file """
def HandleEvent(self, event=None):
return
def __str__(self):
return "%s: %s" % (self.__class__.__name__, self.name)
class Trigger(Bcfg2.Server.Plugin.Plugin,
Bcfg2.Server.Plugin.ClientRunHooks,
Bcfg2.Server.Plugin.DirectoryBacked):
"""Trigger is a plugin that calls external scripts (on the server)."""
name = 'Trigger'
__author__ = 'bcfg-dev@mcs.anl.gov'
def __init__(self, core, datastore):
Bcfg2.Server.Plugin.Plugin.__init__(self, core, datastore)
Bcfg2.Server.Plugin.ClientRunHooks.__init__(self)
Bcfg2.Server.Plugin.DirectoryBacked.__init__(self, self.data,
self.core.fam)
def async_run(self, args):
""" Run the trigger script asynchronously in a forked process
"""
pid = os.fork()
if pid:
os.waitpid(pid, 0)
else:
dpid = os.fork()
if not dpid:
self.debug_log("Running %s" % " ".join(pipes.quote(a)
for a in args))
proc = Popen(args, stdin=PIPE, stdout=PIPE, stderr=PIPE)
err = proc.communicate()[1]
rv = proc.wait()
if rv != 0:
self.logger.error("Trigger: Error running %s (%s): %s" %
(args[0], rv, err))
elif err:
self.debug_log("Trigger: Error: %s" % err)
os._exit(0) # pylint: disable=W0212
def end_client_run(self, metadata):
args = [metadata.hostname, '-p', metadata.profile, '-g',
':'.join([g for g in metadata.groups])]
for notifier in self.entries.keys():
npath = os.path.join(self.data, notifier)
self.async_run([npath] + args)
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