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#ifndef QPID_DATADIR_H
#define QPID_DATADIR_H
/*
* 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 <string>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <fcntl.h>
#include <cerrno>
#include <unistd.h>
namespace qpid {
class LockFile {
public:
LockFile(const std::string& path_, bool create):
path(path_), fd(-1), created(create) {
int flags=create ? O_WRONLY|O_CREAT|O_NOFOLLOW : O_RDWR;
fd = ::open(path.c_str(), flags, 0644);
if (fd < 0) throw Exception("Cannot open " + path + ": " + strError(errno));
if (::lockf(fd, F_TLOCK, 0) < 0) throw Exception("Cannot lock " + path + ": " + strError(errno));
}
~LockFile() {
if (fd >= 0) {
(void) ::lockf(fd, F_ULOCK, 0); // Suppress warnings about ignoring return value.
::close(fd);
}
}
std::string path;
int fd;
bool created;
};
/**
* DataDir class.
*/
class DataDir
{
const bool enabled;
const std::string dirPath;
std::auto_ptr<LockFile> lockFile;
public:
DataDir (std::string path);
~DataDir ();
bool isEnabled () { return enabled; }
std::string getPath () { return dirPath; }
};
} // namespace qpid
#endif /*!QPID_DATADIR_H*/
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