#!/bin/sh # Normally, /etc/timestamp is update in a shutdown script. # # However, on Solo, we do not shut down; power just disappears. # # The goal of this script is to make time move forward, more-or-less, between # runs, i.e. all logs from one run should have timestamps greater than those # in logs from a previous run. /etc/timestamp only has minute-resolution, so # there can be overlap of up to about a minute between the very end of one # run and the very beginning of the next run. # # This is started by init and runs as long as the system is up. # # This only runs on Solo; Artoo is expected to get a power-button shutdown. # # Implementation note: Since power just disappears, we try to update # /etc/timestamp in a way such that it is always has valid contents. If we # just > into it, there may be a short time period when it is empty or does # not exist. The goal of writing a temp file, then doing a move, is to reduce # or eliminate the time window when it does not exist. while true; do date -u +%4Y%2m%2d%2H%2M > /etc/timestamp.new mv /etc/timestamp.new /etc/timestamp sleep 10 done