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""" Invoke an external command to verify file contents """
import os
import sys
import shlex
import logging
import Bcfg2.Server.Plugin
from subprocess import Popen, PIPE
from Bcfg2.Server.Plugins.Cfg import CfgVerifier, CfgVerificationError
LOGGER = logging.getLogger(__name__)
class CfgExternalCommandVerifier(CfgVerifier):
""" Invoke an external script to verify
:ref:`server-plugins-generators-cfg` file contents """
#: Handle :file:`:test` files
__basenames__ = [':test']
def __init__(self, name, specific, encoding):
CfgVerifier.__init__(self, name, specific, encoding)
self.cmd = []
__init__.__doc__ = CfgVerifier.__init__.__doc__
def verify_entry(self, entry, metadata, data):
try:
proc = Popen(self.cmd, stdin=PIPE, stdout=PIPE, stderr=PIPE)
err = proc.communicate(input=data)[1]
rv = proc.wait()
if rv != 0:
raise CfgVerificationError(err)
except:
err = sys.exc_info()[1]
raise CfgVerificationError("Error running external command "
"verifier: %s" % err)
verify_entry.__doc__ = CfgVerifier.verify_entry.__doc__
def handle_event(self, event):
CfgVerifier.handle_event(self, event)
if not self.data:
return
self.cmd = []
if not os.access(self.name, os.X_OK):
bangpath = self.data.splitlines()[0].strip()
if bangpath.startswith("#!"):
self.cmd.extend(shlex.split(bangpath[2:].strip()))
else:
msg = "%s: Cannot execute %s" % (self.__class__.__name__,
self.name)
LOGGER.error(msg)
raise Bcfg2.Server.Plugin.PluginExecutionError(msg)
self.cmd.append(self.name)
handle_event.__doc__ = CfgVerifier.handle_event.__doc__
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