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# Copyright (c) 2012 Red Hat, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import logging
import os
import errno
def do_mkdir(path):
try:
os.mkdir(path)
except Exception, err:
logging.exception("Mkdir failed on %s err: %s", path, str(err))
if err.errno != errno.EEXIST:
raise
return True
def do_makedirs(path):
try:
os.makedirs(path)
except Exception, err:
logging.exception("Makedirs failed on %s err: %s", path, str(err))
if err.errno != errno.EEXIST:
raise
return True
def do_listdir(path):
try:
buf = os.listdir(path)
except Exception, err:
logging.exception("Listdir failed on %s err: %s", path, str(err))
raise
return buf
def do_chown(path, uid, gid):
try:
os.chown(path, uid, gid)
except Exception, err:
logging.exception("Chown failed on %s err: %s", path, str(err))
raise
return True
def do_stat(path):
try:
#Check for fd.
if isinstance(path, int):
buf = os.fstat(path)
else:
buf = os.stat(path)
except Exception, err:
logging.exception("Stat failed on %s err: %s", path, str(err))
raise
return buf
def do_open(path, mode):
try:
fd = open(path, mode)
except Exception, err:
logging.exception("Open failed on %s err: %s", path, str(err))
raise
return fd
def do_close(fd):
#fd could be file or int type.
try:
if isinstance(fd, int):
os.close(fd)
else:
fd.close()
except Exception, err:
logging.exception("Close failed on %s err: %s", fd, str(err))
raise
return True
def do_unlink(path, log = True):
try:
os.unlink(path)
except Exception, err:
if log:
logging.exception("Unlink failed on %s err: %s", path, str(err))
if err.errno != errno.ENOENT:
raise
return True
def do_rmdir(path):
try:
os.rmdir(path)
except Exception, err:
logging.exception("Rmdir failed on %s err: %s", path, str(err))
if err.errno != errno.ENOENT:
raise
return True
def do_rename(old_path, new_path):
try:
os.rename(old_path, new_path)
except Exception, err:
logging.exception("Rename failed on %s to %s err: %s", old_path, new_path, \
str(err))
raise
return True
def mkdirs(path):
"""
Ensures the path is a directory or makes it if not. Errors if the path
exists but is a file or on permissions failure.
:param path: path to create
"""
if not os.path.isdir(path):
try:
do_makedirs(path)
except OSError, err:
#TODO: check, isdir will fail if mounted and volume stopped.
#if err.errno != errno.EEXIST or not os.path.isdir(path)
if err.errno != errno.EEXIST:
raise
def dir_empty(path):
"""
Return true if directory/container is empty.
:param path: Directory path.
:returns: True/False.
"""
if os.path.isdir(path):
try:
files = do_listdir(path)
except Exception, err:
logging.exception("listdir failed on %s err: %s", path, str(err))
raise
if not files:
return True
else:
return False
else:
if not os.path.exists(path):
return True
def rmdirs(path):
if os.path.isdir(path) and dir_empty(path):
do_rmdir(path)
else:
logging.error("rmdirs failed dir may not be empty or not valid dir")
return False
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