fifo.hpp

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#pragma once
 
#include <sys/stat.h>
#include <cstring>
#include <filesystem>
 
#include "../../std/expected.hpp"
#include "../../macro.hpp"
 
namespace ns_linux::ns_fifo
{
 
namespace
{
 
namespace fs = std::filesystem;
 
}

[[nodiscard]] inline Value<fs::path> create(fs::path const& path_file_fifo)
{
  fs::path path_dir_parent = path_file_fifo.parent_path();
  // Create parent directory(ies)
  return_if(not Try(fs::exists(path_dir_parent)) and not Try(fs::create_directories(path_dir_parent))
    , Error("E::Failed to create upper directories '{}' for fifo '{}'", path_dir_parent, path_file_fifo)
  );
  // Replace old fifo if exists
  if (Try(fs::exists(path_file_fifo)))
  {
    Try(fs::remove(path_file_fifo));
  }
  // Create fifo
  return_if(::mkfifo(path_file_fifo.c_str(), 0666) < 0
    , Error("E::Failed to create fifo '{}' with error '{}'", path_file_fifo, strerror(errno))
  );
  return path_file_fifo;
}
 
 
} // namespace ns_linux::ns_fifo