#!/bin/sh

# Need to cover this also:
#  4:13pm  up 29 day(s), 3 min(s),  3 users,  load average: 1.59, 2.54, 2.58
#
uptimeOutput=`/usr/bin/uptime`;
PATH="/bin:/usr/bin:/usr/local/bin";
export PATH;

days=`echo $uptimeOutput | /bin/sed 's/^.* up.* \([0-9][0-9]*\) *day[\(s\)]*.*$/\1/'`;
if [ x"`echo $days | /bin/grep -w up`" != x ]
then
	days=0;
fi
hours_mins=`echo $uptimeOutput | /bin/sed 's/^.* up [^0-9]*\([0-9][0-9]*:[0-9][0-9]*\).*/\1/'`;
if [ x"`echo $hours_mins | /bin/grep up`" = x ]
then
	hours=`echo $hours_mins | cut -f1 -d:`;
	minutes=`echo $hours_mins | cut -f2 -d:`;
else
	hours=`echo $uptimeOutput | /bin/sed 's/^.* up.* \([0-9][0-9]*\) *hr[\(s\)]*.*$/\1/'`;
	if [ x"`echo $hours | grep up`" != x ]
	then
		hours="0";
	fi
	minutes=`echo $uptimeOutput | /bin/sed 's/^.* up.* \([0-9][0-9]*\) *min[\(s\)]*.*$/\1/'`;
	if [ x"`echo $minutes | grep up`" != x ]
	then
		minutes="0";
	fi
fi

if [ x"`echo \"$days $hours $minutes\" | /bin/grep up`" != x ]
then
	echo "Uptime UNKNOWN: Unable to parse uptime output: \"$uptimeOutput\"";
	exit 3;
fi

# 1440 minutes in a day
dayMinutes=`expr $days \* 1440`;
hourMinutes=`expr $hours \* 60`;

totalMinutes=`expr $dayMinutes \+ $hourMinutes`;
totalMinutes=`expr $totalMinutes \+ $minutes`;

# Has it been rebooted in the last hour?
if [ "$totalMinutes" -lt 60 ]
then
	# exit with a warning
	echo "Uptime WARNING: Uptime less than one hour (currently $totalMinutes minutes)|mins=$totalMinutes";
	exit 1;
else
	# everything's okay!
	echo "Uptime OK: Currently $days days, $hours hours and $minutes minutes|mins=$totalMinutes";
	exit 0;
fi