aniki, 2 months ago

This exactly. And because this is open-source, its super easy to track this down. I searched for the source of the error message:

github.com/iputils/iputils/blob/…/ping.c#L237

see this is ping_strtod function - so search for that function name and the first hit is the ‘-i’ case:

<span style="color:#323232;">		case 'i':
</span><span style="color:#323232;">		{
</span><span style="color:#323232;">			double optval;
</span><span style="color:#323232;">
</span><span style="color:#323232;">			optval = ping_strtod(optarg, _("bad timing interval"));
</span><span style="color:#323232;">			if (isless(optval, 0) || isgreater(optval, (double)INT_MAX / 1000))
</span><span style="color:#323232;">				error(2, 0, _("bad timing interval: %s"), optarg);
</span><span style="color:#323232;">			rts.interval = (int)(optval * 1000);
</span><span style="color:#323232;">			rts.opt_interval = 1;
</span><span style="color:#323232;">		}
</span><span style="color:#323232;">			break;
</span>