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/***
This file is part of snapcast
Copyright (C) 2014-2025 Johannes Pohl
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
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
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
***/
// prototype/interface header file
#include "pipe_stream.hpp"
// local headers
#include "common/aixlog.hpp"
#include "common/snap_exception.hpp"
#include "common/str_compat.hpp"
// standard headers
#include <cerrno>
#include <memory>
#include <system_error>
using namespace std;
namespace streamreader
{
static constexpr auto LOG_TAG = "PipeStream";
PipeStream::PipeStream(PcmStream::Listener* pcmListener, boost::asio::io_context& ioc, const ServerSettings& server_settings, const StreamUri& uri)
: AsioStream<stream_descriptor>(pcmListener, ioc, server_settings, uri)
{
umask(0);
string mode = uri_.getQuery("mode", "create");
LOG(INFO, LOG_TAG) << "PipeStream mode: " << mode << "\n";
if ((mode != "read") && (mode != "create"))
throw SnapException(R"(create mode for fifo must be "read" or "create")");
if (mode == "create")
{
if ((mkfifo(uri_.path.c_str(), 0666) != 0) && (errno != EEXIST))
throw SnapException("failed to make fifo \"" + uri_.path + "\": " + cpt::to_string(errno));
}
}
void PipeStream::connect()
{
int fd = open(uri_.path.c_str(), O_RDONLY | O_NONBLOCK);
if (fd < 0)
{
std::string error = "failed to open fifo \"" + uri_.path + "\": " + cpt::to_string(errno);
if (errno == static_cast<int>(std::errc::no_such_file_or_directory))
{
LOG(ERROR, LOG_TAG) << error << "\n";
wait(read_timer_, 200ms, [this, self = shared_from_this()] { connect(); });
return;
}
throw SnapException(error);
}
int pipe_size = -1;
#if !defined(MACOS) && !defined(FREEBSD)
pipe_size = fcntl(fd, F_GETPIPE_SZ);
#endif
LOG(TRACE, LOG_TAG) << "Stream: " << name_ << ", connect to pipe: " << uri_.path << ", fd: " << fd << ", pipe size: " << pipe_size << "\n";
stream_ = std::make_unique<boost::asio::posix::stream_descriptor>(strand_, fd);
on_connect();
}
} // namespace streamreader
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