runners_sighup
static SIGFUNC_DECL runners_sighup __P((int));
FIX_SYSV_SIGNAL(sig, runners_sighup);
Oldsh_hup != runners_sighup)
cursh = sm_signal(SIGHUP, runners_sighup);
if (cursh != runners_sighup)
Oldsh != runners_sighup &&
Oldsh != runners_sighup && Oldsh != runners_sigterm)