check_apc

#!/bin/bash

. $(dirname $0)/lib.sh

while getopts "u:w:c:" OPT; do
	case $OPT in
		u) URL=$OPTARG ;;
		w) WARNING_PC=$OPTARG ;;
		c) CRITICAL_PC=$OPTARG ;;
	esac
done

if [[ -z $URL || -z $WARNING_PC || -z $CRITICAL_PC ]]; then
	echo "Usage: $0 -u <url> -w <warning percentage> -c <critical percentage>"
	exit $STATE_UNKNOWN
fi

INFO="$(curl -sf "$URL")"

if [ $? -gt 0 ]; then
	echo "Failed to fetch APC information"
	exit $STATE_CRITICAL
fi

# Inject sanitized info as prefixed variables
eval "$(sed -nr 's/^([a-z_]+)=([a-z0-9 ]+)$/APC_\U\1\E="\2"/ip' <<< "$INFO")"

if [ $APC_NUM_MISSES -gt 0 ]; then
	RATIO=$((100 * APC_NUM_HITS / (APC_NUM_HITS + APC_NUM_MISSES)))
else
	RATIO=0
fi

TOTAL=$((APC_NUM_SEG * APC_SEG_SIZE))
USED=$((TOTAL - APC_AVAIL_MEM))
USED_PC=$((100 * USED / TOTAL))

INFO="$USED_PC% used, $(bytes_to_human_bi $USED) of \
$(bytes_to_human_bi $TOTAL), $APC_NUM_ENTRIES entries, hit ratio $RATIO%"

# An expunge is triggered when the cache is full. With the default settings
# this clears all cache items. That's bad.
if [ $APC_EXPUNGES -gt 0 ]; then
	INFO="$APC_EXPUNGES EXPUNGES, $INFO"
	STATE=CRITICAL
else
	INFO="$INFO, no expunges"
	if [ $USED_PC -ge $CRITICAL_PC ]; then
		STATE=CRITICAL;
	elif [ $USED_PC -ge $WARNING_PC ]; then
		STATE=WARNING;
	else
		STATE=OK;
	fi
fi

echo "$INFO|used=${USED}B available=${APC_AVAIL_MEM}B \
entries=${APC_NUM_ENTRIES} ratio=${RATIO}"

eval exit \$STATE_$STATE