How do I set the terminal foreground process group for a process I'm running under a pty?

How do I set the terminal foreground process group for a process I'm
running under a pty?

References

Reference NO 1

http://stackoverflow.com/questions/15200700/how-do-i-set-the-terminal-foreground-process-group-for-a-process-im-running-und

Reference NO 2

http://stackoverflow.com/questions/18107541/detecting-when-a-child-process-is-waiting-for-input

Reference NO 3

http://stackoverflow.com/questions/8710829/send-command-and-exit-using-python-pty-pseudo-terminal-process

Reference NO 4

http://fisica.ehu.es/ref/unixfaq.html

Reference NO 5

http://superuser.com/questions/396145/script-command-having-odd-effects-when-resizing-terminal-window

Reference NO 6

http://spin0r.wordpress.com/2012/12/28/terminally-confused-part-seven/

Reference NO 7

http://blog.nelhage.com/2010/01/a-brief-introduction-to-termios-signaling-and-job-control/

Reference NO 8

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