#!/bin/bash
# Check for OOM killer events
SEND_NTFY="/usr/local/bin/send-ntfy.sh"
STATE_FILE="/var/run/oom-check.state"

OOM_COUNT=$(dmesg 2>/dev/null | grep -c "killed process" || echo 0)
LAST_COUNT=0
[ -f "$STATE_FILE" ] && LAST_COUNT=$(cat "$STATE_FILE" 2>/dev/null || echo 0)

if [ "$OOM_COUNT" -gt "$LAST_COUNT" ]; then
    NEW_KILLS=$((OOM_COUNT - LAST_COUNT))
    $SEND_NTFY critical "OOM Killer Active" "🔴 CRITICAL: OOM killed $NEW_KILLS process(es)!" "skull,error"
fi

echo $OOM_COUNT > "$STATE_FILE"
logger -t oom-monitor "OOM: $OOM_COUNT kills"