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