Symbol: isbackground
sys/kern/tty.c
1510
if (isbackground(pr, tp)) {
sys/kern/tty.c
1760
if (isbackground(pr, tp) &&
sys/kern/tty.c
743
while (isbackground(pr, tp) &&
sys/kern/tty_pty.c
291
while (isbackground(pr, tp)) {