Re: Slightly OT: non-buffered stdin in Java

On Thu, Jun 8, 2023 at 2:39 PM Dr. Nikolaus Klepp <dr.klepp@gmx.at> wrote:
>
> Anno domini 2023 Thu, 8 Jun 14:01:19 -0400
>  Aryeh Friedman scripsit:
> > Under Java stdin (System.in) is a buffered stream not sent to the
> > application until return is pressed.  But, Java can read from
> > files/sockets and other generic InputStreams unbuffered.   So I was
> > wondering if there is a command that will make stdin go to a file so
> > that Java can open that file and read it unbuffered?
> >
> > I know I can do something like cat ->file but that makes it hard to
> > sync stdout and stderr (both are unbuffered in Java) with the file
> > version of stdin
> >
>
> "stdbuf" might be what you look for:
>
> https://man.freebsd.org/cgi/man.cgi?query=stdbuf

Will likely need to play with it more but stdbuf -i 0 -o 0 cat -|cat
didn't produce the expected immediate echo I still had to hit return

-- 
Aryeh M. Friedman, Lead Developer, http://www.PetiteCloud.org