code: plan9front

ref: 7f697e822b2efd5c757141720469d105a5605ca4
dir: /rc/bin/uptime/

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#!/bin/awk -f

BEGIN{
	getline sysname < "/dev/sysname";

	getline < "/dev/time";
	sec = sprintf("%d", $3/$4);

	ct = sprintf("%02d:%02d:%02d", sec%86400/3600, sec%86400%3600/60, sec%60);
	printf("%s up %d days, %s\n", sysname, sec/86400, ct);

	exit
}