pgsignal
pgsignal(sp->s_ttyp->t_pgrp, SIGHUP, 1);
pgsignal(sp->s_ttyp->t_pgrp, SIGHUP, 1);
pgsignal(pgrp, SIGHUP, 1);
pgsignal(p->p_pgrp, SIGTTOU, 1);
pgsignal(p->p_pgrp, SIGTTIN, 1);
pgsignal(p->p_pgrp, SIGTTOU, 1);
pgsignal(pgrp, sig, 1);
pgsignal(pgrp, sig, sess != NULL);
void pgsignal(struct pgrp *, int, int);