util.py 文件源码

def rmtree(path, selinux=False, exclude=()):
    """Version of shutil.rmtree that ignores no-such-file-or-directory errors,
       tries harder if it finds immutable files and supports excluding paths"""
    if os.path.islink(path):
        raise OSError("Cannot call rmtree on a symbolic link")
    try_again = True
    retries = 0
    failed_to_handle = False
    failed_filename = None
    if path in exclude:
        return
    while try_again:
        try_again = False
        try:
            names = os.listdir(path)
            for name in names:
                fullname = os.path.join(path, name)
                if fullname not in exclude:
                    try:
                        mode = os.lstat(fullname).st_mode
                    except OSError:
                        mode = 0
                    if stat.S_ISDIR(mode):
                        try:
                            rmtree(fullname, selinux=selinux, exclude=exclude)
                        except OSError as e:
                            if e.errno in (errno.EPERM, errno.EACCES, errno.EBUSY):
                                # we alrady tried handling this on lower level and failed,
                                # there's no point in trying again now
                                failed_to_handle = True
                            raise
                    else:
                        os.remove(fullname)
            os.rmdir(path)
        except OSError as e:
            if failed_to_handle:
                raise
            if e.errno == errno.ENOENT:  # no such file or directory
                pass
            elif exclude and e.errno == errno.ENOTEMPTY:  # there's something excluded left
                pass
            elif selinux and (e.errno == errno.EPERM or e.errno == errno.EACCES):
                try_again = True
                if failed_filename == e.filename:
                    raise
                failed_filename = e.filename
                os.system("chattr -R -i %s" % path)
            elif e.errno == errno.EBUSY:
                retries += 1
                if retries > 1:
                    raise
                try_again = True
                getLog().debug("retrying failed tree remove after sleeping a bit")
                time.sleep(2)
            else:
                raise