#!/bin/bash

# Check if correct number of arguments are passed
if [ "$#" -ne 4 ]; then
    echo "Usage: $0 <start-date> <start-time> <end-date> <end-time>"
    echo "Example: $0 2024-09-26 08:00:00 2024-09-26 12:00:00"
    exit 1
fi

START_DATE=$1
START_TIME=$2
END_DATE=$3
END_TIME=$4

# Combine date and time into the format expected by journalctl
START="$START_DATE $START_TIME"
END="$END_DATE $END_TIME"

# Check if journalctl is available on the server
if ! command -v journalctl &> /dev/null
then
    echo "journalctl could not be found. Please install it first."
    exit 1
fi

# Fetch logs from the given date/time range
journalctl --since="$START" --until="$END" > /tmp/logs_${START_DATE}_${START_TIME}_to_${END_DATE}_${END_TIME}.log

echo "Logs from $START to $END have been saved to /tmp/logs_${START_DATE}_${START_TIME}_to_${END_DATE}_${END_TIME}.log"