Disassocation from controlling tty

[bossert at ssc-bee.UUCP]

Where the desired goal is disassociation of a process from its
controlling tty, what are the differences between

		setpgrp() 
		
		and 
		
		ioctl(fd, TIOCSPGRP, &npgrp)?

Which is preferable?  Why?

	John Bossert
	ssc-vax!bossert at uw-beaver.{UUCP, ARPA}
-- 


	John Bossert
	uw-beaver!ssc-vax!bossert