On Sun, Jan 08, 2012 at 11:51:51AM +0400, Sandeep wrote:
> Could you please help me how to modify this in such a way that, call
> "stdin_cb" everytime there is input (but not simply in infinite loop), if
> there is no input just keep waiting without exiting.
>
> static void
> stdin_cb (EV_P_ struct ev_io *w, int revents)
> {
> puts ("stdin ready");
> }
The infinite-loop issue stems from the fact that you do not actually read
what the user entered on stdin, so that data stays available, and stdin_cb
keeps being triggered. You have to "flush" stdin to make clear to the kernel
that you got what the user entered and react to new input:
char buf[SIZE];
while(read(0, buf, SIZE) > 0);
You might also want to google "edge-triggered" vs. "level-triggered" (or read
the epoll(7) man page about it).
Best,
--
Gabriel
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