process group of tty**

Tue Mar 27 03:34:14 AEST 1990

I have a program that needs to be able to send a HUP signal to the
process group associated with the tty side of a tty/pty pair.  The
program has the pty side opened as a file, and knows the ascii file
name of the tty side.  If it could find out the process group, it
could use killpg().  Alternately, if it could find out the process id
of the controlling process (the one that originally opened the tty
side as a file, it could send the signal using kill().  HELP !!!!!

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