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// @file paths.h
// file paths and directory handling
/* Copyright 2010 10gen 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.
*/
#pragma once
#include "mongoutils/str.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
namespace mongo {
using namespace mongoutils;
extern string dbpath;
/** this is very much like a boost::path. however, we define a new type to get some type
checking. if you want to say 'my param MUST be a relative path", use this.
*/
struct RelativePath {
string _p;
bool empty() const { return _p.empty(); }
static RelativePath fromRelativePath(string f) {
RelativePath rp;
rp._p = f;
return rp;
}
/** from a full path */
static RelativePath fromFullPath(path f) {
path dbp(dbpath); // normalizes / and backslash
string fullpath = f.string();
string relative = str::after(fullpath, dbp.string());
if( relative.empty() ) {
log() << "warning file is not under db path? " << fullpath << ' ' << dbp.string() << endl;
RelativePath rp;
rp._p = fullpath;
return rp;
}
/*uassert(13600,
str::stream() << "file path is not under the db path? " << fullpath << ' ' << dbpath,
relative != fullpath);*/
if( str::startsWith(relative, "/") || str::startsWith(relative, "\\") ) {
relative.erase(0, 1);
}
RelativePath rp;
rp._p = relative;
return rp;
}
string toString() const { return _p; }
bool operator!=(const RelativePath& r) const { return _p != r._p; }
bool operator==(const RelativePath& r) const { return _p == r._p; }
bool operator<(const RelativePath& r) const { return _p < r._p; }
string asFullPath() const {
path x(dbpath);
x /= _p;
return x.string();
}
};
inline dev_t getPartition(const string& path){
struct stat stats;
if (stat(path.c_str(), &stats) != 0){
uasserted(13646, str::stream() << "stat() failed for file: " << path << " " << errnoWithDescription());
}
return stats.st_dev;
}
inline bool onSamePartition(const string& path1, const string& path2){
dev_t dev1 = getPartition(path1);
dev_t dev2 = getPartition(path2);
return dev1 == dev2;
}
inline void flushMyDirectory(const boost::filesystem::path& file){
#ifdef __linux__ // this isn't needed elsewhere
massert(13652, str::stream() << "Couldn't find parent dir for file: " << file.string(), file.has_branch_path());
boost::filesystem::path dir = file.branch_path(); // parent_path in new boosts
log(1) << "flushing directory " << dir.string() << endl;
int fd = ::open(dir.string().c_str(), O_RDONLY); // DO NOT THROW OR ASSERT BEFORE CLOSING
massert(13650, str::stream() << "Couldn't open directory '" << dir.string() << "' for flushing: " << errnoWithDescription(), fd >= 0);
if (fsync(fd) != 0){
int e = errno;
close(fd);
massert(13651, str::stream() << "Couldn't fsync directory '" << dir.string() << "': " << errnoWithDescription(e), false);
}
close(fd);
#endif
}
}
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