我在Aix 5.3 下执行以下代码,用来用来测试多进程下次的日志操作.

#-*-coding: utf-8 -*-

import logging, os, sys, time

def forking_func():
    logging.debug("Here is forking_func")


def main():
    logging.debug("Befor fork: %s" % os.getpid())
    if os.fork():
    time.sleep(10)
        logging.debug("Parent: %s" % os.getpid())
    else:
        logging.debug("child: %s" % os.getpid())
        sys.exit(0)

    print "Exit process my pid: %s " % os.getpid


if __name__ == '__main__':
    main()

结果我得到如下的错误信息:
python test_forking.py
sem_wait: Permission denied
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "/usr/local/lib/python2.4/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/usr/local/lib/python2.4/logging/__init__.py", line 1333, in shutdown
    h.close()
  File "/usr/local/lib/python2.4/logging/__init__.py", line 677, in close
    _releaseLock()
  File "/usr/local/lib/python2.4/logging/__init__.py", line 188, in _releaseLock
    _lock.release()
  File "/usr/local/lib/python2.4/threading.py", line 113, in release
    assert self.__owner is me, "release() of un-acquire()d lock"
AssertionError: release() of un-acquire()d lock
sem_wait: Permission denied
sem_trywait: Permission denied
sem_trywait: Permission denied
sem_post: Permission denied
sem_wait: Permission denied
sem_trywait: Permission denied
sem_post: Permission denied
sem_wait: Permission denied
sem_trywait: Permission denied
sem_post: Permission denied
Error in sys.exitfunc:
Traceback (most recent call last):
  File "/usr/local/lib/python2.4/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/usr/local/lib/python2.4/logging/__init__.py", line 1333, in shutdown
    h.close()
  File "/usr/local/lib/python2.4/logging/__init__.py", line 677, in close
    _releaseLock()
  File "/usr/local/lib/python2.4/logging/__init__.py", line 188, in _releaseLock
    _lock.release()
  File "/usr/local/lib/python2.4/threading.py", line 113, in release
    assert self.__owner is me, "release() of un-acquire()d lock"
AssertionError: release() of un-acquire()d lock
sem_trywait: Permission denied
sem_post: Permission denied
sem_destroy: Permission denied
sem_wait: Permission denied
sem_post: Permission denied
sem_wait: Permission denied
sem_post: Permission denied
sem_wait: Permission denied
sem_post: Permission denied
sem_wait: Permission denied
sem_post: Permission denied
Exit process my pid: 409794

看上去似乎是权限的问题。
但是，我用多线程去实现以上的功能是没有问题的。不解。
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