Re: Detect that a child is waiting for input

[unDEFER via Digitalmars-d]

On Wednesday, 23 November 2016 at 07:18:27 UTC, Shachar Shemesh 
wrote:

The shell does that for background processes. I think it takes 
away the TTY from its children, and this way, when they try to 
read from stdin, they get SIGSTOP from the system.

I'm not sure what the precise mechanism is.

There are flags passed to wait which will cause it to report 
when a child gets SIGSTOP.

Hope this helps,
Shachar

So, I have found with strace, this signal is SIGTTIN is special 
signal which sends to _background_ task when it tries to read 
from terminal.

So it is possible such detect when I will write not simple 
pipeProcess, but will write terminal emulator.
Thank you.