Write to STDIN of running Process

Additional.md

• https://linuxprograms.wordpress.com/2008/02/14/fifo-named-pipes-mkfifo-mknod/

namedPipeNode.md

http://stackoverflow.com/questions/15624641/spawn-node-child-process-with-named-pipe-as-stdin

var spawn = require('child_process').spawn;

var fd_stdin = fs.openSync('lk.log', 'r');
spawn('node', ['monitor.js'], {
    stdio: [fd_stdin, 1, 2];
});

http://stackoverflow.com/questions/33613341/how-to-send-broadcast-messages-with-named-pipe-using-c

write-stdin.sh

## Alternative 1: write to file descriptor (not usable)
input='testing'
pid=1212

echo $input > /proc/$pid/fd/0

## Alternative 2: Pipe fifo to the app

fifo_file=/tmp/fifo

mkfifo $fifo_file; cat > $fifo_file &; echo $! > {$fifo_file}.pid
(cat $fifo_file | myapp)

echo "testing" > $fifo_file

kill -9 `cat $fifo_file.pid` && rm $fifo_file*