TERMP_BRNEVER
p->flags |= TERMP_BRNEVER | TERMP_NOSPACE;
p->flags &= ~TERMP_BRNEVER;
p->flags |= TERMP_BRNEVER;
p->flags &= ~TERMP_BRNEVER;
p->flags |= TERMP_BRNEVER;
p->flags &= ~TERMP_BRNEVER;
p->flags & TERMP_BRNEVER ? SIZE_MAX : vtarget);