Log ping results of multiple ip-addresses to a csv file

log-pings.sh

#!/bin/bash

# List of IP addresses to ping (one per line)
IPS=(
    "1.1.1.1"
    "192.168.1.1"
    # Add more IPs here
)

# Ping interval in seconds
INTERVAL=5

while true; do
    # Get current time and calculate sleep duration until next interval mark
    current_seconds=$(date +%s)
    next_iteration=$((current_seconds - (current_seconds % INTERVAL) + INTERVAL))
    sleep $((next_iteration - current_seconds))

    timestamp=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
    current_date=$(date -u +"%Y-%m-%d")
    log_file="ping_results_${current_date}.csv"

    # Create file with headers if it doesn't exist
    if [ ! -f "$log_file" ]; then
        echo "timestamp;ip;response_ms;error" > "$log_file"
    fi

    # Start all pings in parallel
    for ip in "${IPS[@]}"; do
        (
            result=$(ping -c 1 -W 4 "$ip" 2>&1)
            if [ $? -eq 0 ]; then
                response_time=$(echo "$result" | grep -oP 'time=\K[0-9.]+')
                echo "$timestamp;$ip;$response_time;" >> "$log_file"
            else
                error=$(echo "$result" | sed -n 2,2p)
                echo "$timestamp;$ip;;$error" >> "$log_file"
            fi
        ) &
    done

    # Wait for all background processes to finish
    wait
done