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""" Check for templated scripts or executables. """
import os
import stat
import Bcfg2.Server.Lint
from Bcfg2.Compat import any # pylint: disable=W0622
from Bcfg2.Server.Plugin import default_path_metadata
from Bcfg2.Server.Plugins.Cfg.CfgInfoXML import CfgInfoXML
from Bcfg2.Server.Plugins.Cfg.CfgGenshiGenerator import CfgGenshiGenerator
from Bcfg2.Server.Plugins.Cfg.CfgCheetahGenerator import CfgCheetahGenerator
from Bcfg2.Server.Plugins.Cfg.CfgJinja2Generator import CfgJinja2Generator
from Bcfg2.Server.Plugins.Cfg.CfgEncryptedGenshiGenerator import \
CfgEncryptedGenshiGenerator
from Bcfg2.Server.Plugins.Cfg.CfgEncryptedCheetahGenerator import \
CfgEncryptedCheetahGenerator
from Bcfg2.Server.Plugins.Cfg.CfgEncryptedJinja2Generator import \
CfgEncryptedJinja2Generator
class TemplateAbuse(Bcfg2.Server.Lint.ServerPlugin):
""" Check for templated scripts or executables. """
templates = [CfgGenshiGenerator, CfgCheetahGenerator, CfgJinja2Generator,
CfgEncryptedGenshiGenerator, CfgEncryptedCheetahGenerator,
CfgEncryptedJinja2Generator]
extensions = [".pl", ".py", ".sh", ".rb"]
def Run(self):
if 'Cfg' in self.core.plugins:
for entryset in self.core.plugins['Cfg'].entries.values():
for entry in entryset.entries.values():
if (self.HandlesFile(entry.name) and
any(isinstance(entry, t) for t in self.templates)):
self.check_template(entryset, entry)
@classmethod
def Errors(cls):
return {"templated-script": "warning",
"templated-executable": "warning"}
def check_template(self, entryset, entry):
""" Check a template to see if it's a script or an executable. """
# first, check for a known script extension
ext = os.path.splitext(entryset.path)[1]
if ext in self.extensions:
self.LintError("templated-script",
"Templated script found: %s\n"
"File has a known script extension: %s\n"
"Template a config file for the script instead" %
(entry.name, ext))
return
# next, check for a shebang line
firstline = open(entry.name).readline()
if firstline.startswith("#!"):
self.LintError("templated-script",
"Templated script found: %s\n"
"File starts with a shebang: %s\n"
"Template a config file for the script instead" %
(entry.name, firstline))
return
# finally, check for executable permissions in info.xml
for entry in entryset.entries.values():
if isinstance(entry, CfgInfoXML):
for pinfo in entry.infoxml.pnode.data.xpath("//FileInfo"):
try:
mode = int(
pinfo.get("mode",
default_path_metadata()['mode']), 8)
except ValueError:
# LintError will be produced by RequiredAttrs plugin
self.logger.warning("Non-octal mode: %s" % mode)
continue
if mode & stat.S_IXUSR != 0:
self.LintError(
"templated-executable",
"Templated executable found: %s\n"
"Template a config file for the executable instead"
% entry.name)
return
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