timeWarp.sh

#!/bin/bash
# my log file is n the same dir as the script
# this script creates backlogs with times stamps for sync ops
# Re-run with sudo if needed
if [[ $EUID -ne 0 ]]; then
    echo "Requesting sudo privileges..."
    exec sudo "$0" "$@"
fi

set -euo pipefail

LOGFILE="mca_log-1.csv"
LOOPS=3000
REAL_USER="${SUDO_USER:-$USER}"
DEST_ROOT="$(pwd)"
SCRIPT_PATH="$(readlink -f "$0")"
SCRIPT_DIR="$(dirname "$SCRIPT_PATH")"
SRC_LOG="$SCRIPT_DIR/$LOGFILE"

if [[ ! -f "$SRC_LOG" ]]; then
    echo "Source log file not found: $SRC_LOG"
    exit 1
fi

REAL_TS="$(date '+%Y-%m-%d %H:%M:%S')"
REAL_EPOCH="$(date +%s)"

echo "Real time saved: $REAL_TS"
echo "Starting ${LOOPS}-day simulation..."

cleanup() {
    echo "Restoring real time..."
    date -s "$REAL_TS" >/dev/null 2>&1 || true
    timedatectl set-ntp true >/dev/null 2>&1 || true
    systemctl start systemd-timesyncd >/dev/null 2>&1 || true
    systemctl start chronyd >/dev/null 2>&1 || true
    systemctl start ntpd >/dev/null 2>&1 || true
    echo "Done."
}
trap cleanup EXIT

# Disable time sync
timedatectl set-ntp false >/dev/null 2>&1 || true
systemctl stop systemd-timesyncd >/dev/null 2>&1 || true
systemctl stop chronyd >/dev/null 2>&1 || true
systemctl stop ntpd >/dev/null 2>&1 || true

for ((i=1; i<=LOOPS; i++)); do
    FAKE_EPOCH=$(( REAL_EPOCH - i*86400 ))
    FAKE_TIME="$(date -d "@$FAKE_EPOCH" '+%Y-%m-%d %H:%M:%S')"

    echo "[$i/$LOOPS] Setting fake date: $FAKE_TIME"
    date -s "$FAKE_TIME" >/dev/null

    YEAR="$(date '+%Y')"
    MONTH="$(date '+%m')"
    DAY="$(date '+%d')"

    DEST_DIR="$DEST_ROOT/$YEAR/$MONTH/$DAY"

    sudo -u "$REAL_USER" mkdir -p "$DEST_DIR"
    sudo -u "$REAL_USER" cp -f "$SRC_LOG" "$DEST_DIR/$LOGFILE"
    sudo -u "$REAL_USER" touch -d "$FAKE_TIME" "$DEST_DIR/$LOGFILE"

done

echo "Simulation complete."