c743f66c4f
Previously we were testing by using methods without decorators, which were labelled as "inner" methods. We don't need to do that now that we can fixture away the decorator. Change-Id: I9b21e8a0f9a0ed9e70d1fc07e60a6beff110c19c
118 lines
3.3 KiB
Python
118 lines
3.3 KiB
Python
# Copyright 2016 Red Hat, Inc
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# Copyright 2017 Rackspace Australia
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Routines that bypass file-system checks."""
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import errno
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import os
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from oslo_utils import fileutils
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from nova import exception
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import nova.privsep
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@nova.privsep.sys_admin_pctxt.entrypoint
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def readfile(path):
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if not os.path.exists(path):
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raise exception.FileNotFound(file_path=path)
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with open(path, 'r') as f:
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return f.read()
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@nova.privsep.sys_admin_pctxt.entrypoint
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def writefile(path, mode, content):
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if not os.path.exists(os.path.dirname(path)):
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raise exception.FileNotFound(file_path=path)
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with open(path, mode) as f:
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f.write(content)
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@nova.privsep.sys_admin_pctxt.entrypoint
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def readlink(path):
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if not os.path.exists(path):
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raise exception.FileNotFound(file_path=path)
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return os.readlink(path)
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@nova.privsep.sys_admin_pctxt.entrypoint
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def chown(path, uid=-1, gid=-1):
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if not os.path.exists(path):
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raise exception.FileNotFound(file_path=path)
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return os.chown(path, uid, gid)
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@nova.privsep.sys_admin_pctxt.entrypoint
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def makedirs(path):
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fileutils.ensure_tree(path)
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@nova.privsep.sys_admin_pctxt.entrypoint
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def chmod(path, mode):
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if not os.path.exists(path):
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raise exception.FileNotFound(file_path=path)
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os.chmod(path, mode)
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@nova.privsep.sys_admin_pctxt.entrypoint
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def utime(path):
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if not os.path.exists(path):
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raise exception.FileNotFound(file_path=path)
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# NOTE(mikal): the old version of this used execute(touch, ...), which
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# would apparently fail on shared storage when multiple instances were
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# being launched at the same time. If we see failures here, we might need
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# to wrap this in a try / except.
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os.utime(path, None)
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@nova.privsep.sys_admin_pctxt.entrypoint
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def rmdir(path):
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if not os.path.exists(path):
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raise exception.FileNotFound(file_path=path)
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os.rmdir(path)
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class path(object):
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@staticmethod
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@nova.privsep.sys_admin_pctxt.entrypoint
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def exists(path):
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return os.path.exists(path)
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@nova.privsep.sys_admin_pctxt.entrypoint
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def last_bytes(path, num):
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"""Return num bytes from the end of the file, and remaining byte count.
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:param path: The file to read
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:param num: The number of bytes to return
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:returns: (data, remaining)
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"""
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with open(path, 'rb') as f:
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try:
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f.seek(-num, os.SEEK_END)
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except IOError as e:
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# seek() fails with EINVAL when trying to go before the start of
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# the file. It means that num is larger than the file size, so
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# just go to the start.
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if e.errno == errno.EINVAL:
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f.seek(0, os.SEEK_SET)
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else:
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raise
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remaining = f.tell()
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return (f.read(), remaining)
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