Function ReinstateSignalHandler

cpp/src/arrow/util/io_util.cc:2080–2085

}

void ReinstateSignalHandler(int signum, SignalHandler::Callback handler) {
#if !ARROW_HAVE_SIGACTION
  // Cannot report any errors from signal() (but there shouldn't be any)
  signal(signum, handler);
#endif
}

Status SendSignal(int signum) {
  if (raise(signum) == 0) {