SHELD
if ((sigtable[sig].s_flag & SHELD) == 0)
if (sigtable[sig].s_flag & SHELD)
sigtable[sig].s_flag |= SHELD;
if ((sigtable[sig].s_flag & SHELD) == 0)
sigtable[sig].s_flag &= ~SHELD;
sigtable[sig].s_flag |= SHELD|SPAUSE;
if (sigtable[i].s_flag & SHELD)
if (sigtable[sig].s_flag & SHELD) {
sigtable[sig].s_flag |= SHELD;
sigtable[sig].s_flag &= ~SHELD;