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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*
*/
#include "Exception.h"
#include "DataDir.h"
#include "qpid/log/Statement.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <cerrno>
namespace qpid {
DataDir::DataDir (std::string path) :
enabled (!path.empty ()),
dirPath (path)
{
if (!enabled)
{
QPID_LOG (info, "No data directory - Disabling persistent configuration");
return;
}
const char *cpath = dirPath.c_str ();
struct stat s;
if (::stat (cpath, &s))
throw Exception ("Data directory not found: " + path);
std::string lockFile (path);
lockFile = lockFile + "/lock";
int fd = ::open (lockFile.c_str (), O_CREAT | O_EXCL,
S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
if (fd == -1)
{
if (errno == EEXIST)
throw Exception ("Data directory is locked by another process");
if (errno == EACCES)
throw Exception ("Insufficient privileges for data directory");
std::ostringstream oss;
oss << "Error locking data directory: errno=" << errno;
throw Exception (oss.str ());
}
QPID_LOG (info, "Locked data directory: " << dirPath);
}
DataDir::~DataDir ()
{
if (dirPath.empty ())
return;
std::string lockFile (dirPath);
lockFile = lockFile + "/lock";
::unlink (lockFile.c_str ());
QPID_LOG (info, "Unlocked data directory: " << dirPath);
}
} // namespace qpid
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