killpg
if ((n < -1 ? killpg(-n, sig) : kill(n, sig)) < 0) {
killpg(j->pgrp, SIGHUP);
killpg(j->pgrp, SIGCONT);
(void) killpg(j->pgrp, SIGCONT);
if (killpg(j->pgrp, sig) < 0) {
if (j->state == PRUNNING && killpg(j->pgrp, SIGCONT) < 0) {
killpg(0, SIGTTIN);
if (killpg(jp->pgrp, SIGCONT) != -1)
int killpg(pid_t, int);
(void)killpg(pid, sig);
killpg(pid, sig);
killpg(getpgid(child), SIGKILL);
#define KILLPG(pid, sig) killpg((pid), (sig))
killpg(pgid, killsig);
killpg(pgid, killsig);
killpg(ttysig_forward, signo);