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Lock the Postfix config dir

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This commit is contained in:
Brad Warren 2017-08-24 15:03:11 -07:00
parent 967a1830e6
commit 0efc02d6ee
1 changed files with 14 additions and 0 deletions
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14
certbot-postfix/certbot_postfix/installer.py
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@ -60,6 +60,7 @@ class Installer(plugins_common.Plugin):
self._verify_postconf_available()
self._set_config_dir()
self._check_version()
self._lock_config_dir()
self.fn = self.find_postfix_cf()
with open(self.fn) as f:
@ -146,6 +147,19 @@ class Installer(plugins_common.Plugin):
# - Built-in support for TLS management and DANE added, see:
# http://www.postfix.org/postfix-tls.1.html
def _lock_config_dir(self):
"""Stop two Postfix plugins from modifying the config at once.
:raises .PluginError: if unable to acquire the lock
"""
try:
certbot_util.lock_dir_until_exit(self.config_dir)
except (OSError, errors.LockError):
logger.debug("Encountered error:", exc_info=True)
raise errors.PluginError(
"Unable to lock %s", self.config_dir)
def find_postfix_cf(self):
"Search far and wide for the correct postfix configuration file"
return os.path.join(self.config_dir, "main.cf")