pid_t
ypldap_dns(int pipe_ntp[2], struct passwd *pw)
{
pid_t pid;
struct event ev_sigint;
struct event ev_sigterm;
struct event ev_sighup;
struct env env;
switch (pid = fork()) {
case -1:
fatal("cannot fork");
break;
case 0:
break;
default:
return (pid);
}
setproctitle("dns engine");
close(pipe_ntp[0]);
if (setgroups(1, &pw->pw_gid) ||
setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) ||
setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid))
fatal("can't drop privileges");
endservent();
if (pledge("stdio dns", NULL) == -1)
fatal("pledge");
event_init();
signal_set(&ev_sigint, SIGINT, dns_sig_handler, NULL);
signal_set(&ev_sigterm, SIGTERM, dns_sig_handler, NULL);
signal_set(&ev_sighup, SIGHUP, dns_sig_handler, NULL);
signal_add(&ev_sigint, NULL);
signal_add(&ev_sigterm, NULL);
signal_add(&ev_sighup, NULL);
if ((env.sc_iev = calloc(1, sizeof(*env.sc_iev))) == NULL)
fatal(NULL);
env.sc_iev->events = EV_READ;
env.sc_iev->data = &env;
imsg_init(&env.sc_iev->ibuf, pipe_ntp[1]);
env.sc_iev->handler = dns_dispatch_imsg;
event_set(&env.sc_iev->ev, env.sc_iev->ibuf.fd, env.sc_iev->events,
env.sc_iev->handler, &env);
event_add(&env.sc_iev->ev, NULL);
event_dispatch();
dns_shutdown();
return (0);
}
void
dns_sig_handler(int sig, short event, void *p)
{
switch (sig) {
case SIGINT:
case SIGTERM:
dns_shutdown();
break;
default:
fatalx("unexpected signal");
}
}