Does python logging.handlers.RotatingFileHandler allow creation of a group writable log file?

Question

I\'m using the standard python (2.5.2) logging module, specifically the RotatingFileHandler, on a linux system. My application supports both a command-line interfa

Answer 1

It looks that def _open(self): worked with umask(0o000) to get all the permissions of -rw-rw-rw-.

os.chmod(self.baseFilename, 0o0777) failed with ValueError: Unable to configure handler 'some_handler': [Errno 1] Operation not permitted: if the log file has ownership of root:root that's different from running process's, such as testuser.

from logging import handlers

import logging
import os

class GroupWriteRotatingFileHandler(handlers.RotatingFileHandler):
    def _open(self):
        prevumask = os.umask(0o000)  # -rw-rw-rw-
        rtv = logging.handlers.RotatingFileHandler._open(self)
        os.umask(prevumask)
        return rtv

LOGGING = {
    'handlers': {
        'db_handler': {
                'level': 'DEBUG',
                'class': 'log.GroupWriteRotatingFileHandler',
                'filename': PATH_TO_LOGS + '/db.log',
                'maxBytes': maxBytes,
                'backupCount': backupCount,
                'formatter': 'standard',
        },

Log files:

logs]# ls -lrt
-rw-rw-rw- 1 root root 71 Apr  1 16:02 db.log

logs]# ls -lrt
total 0
-rw-rw-rw- 1 testuser testuser 0 Apr  1 16:20 db.log