Input Output
Nonblocking stdin
I've done this on QNX4.5 that doesn't support threads or Boost by using select. You basically pass select STDIN as the file descriptor to use and select will return when a new line is entered. I've added a simplified example loop below. It's platform independent, at least for Unix like systems. Not sure about Windows though.
while (!g_quit)
{
//we want to receive data from stdin so add these file
//descriptors to the file descriptor set. These also have to be reset
//within the loop since select modifies the sets.
FD_ZERO(&read_fds);
FD_SET(STDIN_FILENO, &read_fds);
result = select(sfd + 1, &read_fds, NULL, NULL, NULL);
if (result == -1 && errno != EINTR)
{
cerr << "Error in select: " << strerror(errno) << "\n";
break;
}
else if (result == -1 && errno == EINTR)
{
//we've received and interrupt - handle this
....
}
else
{
if (FD_ISSET(STDIN_FILENO, &read_fds))
{
process_cmd(sfd);
}
}
}