zopectl.py 文件源码

def run():
    # we don't care to be notified of our childrens' exit statuses.
    # this prevents zombie processes from cluttering up the process
    # table when zopectl start/stop is used interactively.
    # DM 2004-11-26: from the Linux "execve(2)" manual page:
    #     Any signals set to be caught by the calling process are reset
    #     to their default behaviour.
    #     The SIGCHLD signal (when set to SIG_IGN) may or may not be reset
    #     to SIG_DFL.
    #   If it is not reset, 'os.wait[pid]' can non-deterministically fail.
    #   Thus, use a way such that "SIGCHLD" is definitely reset in children.
    # signal.signal(signal.SIGCHLD, signal.SIG_IGN)
    if not WIN and os.uname()[0] != 'Darwin':
        # On Windows the os.uname method does not exist.
        # On Mac OS X, setting up a signal handler causes waitpid to
        # raise EINTR, which is not preventable via the Python signal
        # handler API and can't be dealt with properly as we can't pass
        # the SA_RESTART to the signal API. Since Mac OS X doesn't
        # appear to clutter up the process table with zombies if
        # SIGCHILD is unset, just don't bother registering a SIGCHILD
        # signal handler at all.
        signal.signal(signal.SIGCHLD, _ignoreSIGCHLD)
    exitstatus = main()
    sys.exit(exitstatus)