killchild
killchild(0);
ssh_signal(SIGTERM, killchild);
ssh_signal(SIGINT, killchild);
ssh_signal(SIGHUP, killchild);
ssh_signal(SIGTERM, killchild);
ssh_signal(SIGINT, killchild);
ssh_signal(SIGHUP, killchild);
sa.sa_handler = interactive ? read_interrupt : killchild;
ssh_signal(SIGTERM, killchild);
ssh_signal(SIGINT, killchild);
ssh_signal(SIGHUP, killchild);