4b32f9c9e3
The fix Iac8496065c8b6212d7edac320659444ab341b513 removed the last user of VFSLocalFS so this patch remove the class, the related tests and all the privsep functions that become dead code after this cleanup. Change-Id: Ia1eb1d93d1f9699a4027b7a07107109ab9a3a29a
113 lines
3.3 KiB
Python
113 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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import shutil
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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 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 chown(
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path: str, uid: int = -1, gid: int = -1, recursive: bool = False,
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) -> None:
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if not os.path.exists(path):
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raise exception.FileNotFound(file_path=path)
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if not recursive or os.path.isfile(path):
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return os.chown(path, uid, gid)
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for root, dirs, files in os.walk(path):
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os.chown(root, uid, gid)
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for item in dirs:
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os.chown(os.path.join(root, item), uid, gid)
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for item in files:
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os.chown(os.path.join(root, item), 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 move_tree(source_path: str, dest_path: str) -> None:
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shutil.move(source_path, dest_path)
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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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@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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