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/**
* Copyright (C) 2022-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#ifndef _WIN32
#include "named_pipe.h"
#include <fmt/format.h>
#include <string>
#include <sys/stat.h>
#include <sys/types.h>
#include "mongo/db/storage/io_error_message.h"
#include "mongo/logv2/log.h"
#include "mongo/stdx/thread.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kStorage
namespace mongo {
using namespace fmt::literals;
NamedPipeOutput::NamedPipeOutput(const std::string& pipeRelativePath)
: _pipeAbsolutePath(kDefaultPipePath + pipeRelativePath), _ofs() {
remove(_pipeAbsolutePath.c_str());
uassert(7005005,
"Failed to create a named pipe, error={}"_format(
getErrorMessage("mkfifo", _pipeAbsolutePath)),
mkfifo(_pipeAbsolutePath.c_str(), 0664) == 0);
}
NamedPipeOutput::~NamedPipeOutput() {
close();
remove(_pipeAbsolutePath.c_str());
}
void NamedPipeOutput::open() {
_ofs.open(_pipeAbsolutePath.c_str(), std::ios::binary | std::ios::app);
if (!_ofs.is_open() || !_ofs.good()) {
LOGV2_ERROR(7005009,
"Failed to open a named pipe",
"error"_attr = getErrorMessage("open", _pipeAbsolutePath));
}
}
int NamedPipeOutput::write(const char* data, int size) {
uassert(7005011, "Output must have been opened before writing", _ofs.is_open());
_ofs.write(data, size);
if (_ofs.fail()) {
return -1;
}
return size;
}
void NamedPipeOutput::close() {
if (_ofs.is_open()) {
_ofs.close();
}
}
NamedPipeInput::NamedPipeInput(const std::string& pipeRelativePath)
: _pipeAbsolutePath(kDefaultPipePath + pipeRelativePath), _ifs() {}
NamedPipeInput::~NamedPipeInput() {
close();
}
void NamedPipeInput::doOpen() {
// Retry open every 1 ms for up to 1 sec in case writer has not created the pipe yet.
int retries = 0;
do {
_ifs.open(_pipeAbsolutePath.c_str(), std::ios::binary | std::ios::in);
if (!_ifs.is_open()) {
stdx::this_thread::sleep_for(stdx::chrono::milliseconds(1));
++retries;
}
} while (!_ifs.is_open() && retries <= 1000);
}
int NamedPipeInput::doRead(char* data, int size) {
_ifs.read(data, size);
return _ifs.gcount();
}
void NamedPipeInput::doClose() {
_ifs.close();
}
bool NamedPipeInput::isOpen() const {
return _ifs.is_open();
}
bool NamedPipeInput::isGood() const {
return _ifs.good();
}
bool NamedPipeInput::isFailed() const {
return _ifs.fail();
}
bool NamedPipeInput::isEof() const {
return _ifs.eof();
}
} // namespace mongo
#endif
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