Without fsync, there's a risk of zero-length files being persisted if
there's a power failure.
Don't bother fsyncing the parent directory because it's OK if the data rolls
back to the previous version; we only need to avoid data corruption.
Closes: #101
Specifically, certspotter no longer terminates unless it receives SIGTERM
or SIGINT or there is a serious error.
Although using cron made sense in the early days of Certificate
Transparency, certspotter now needs to run continuously to reliably keep
up with the high growth rate of contemporary CT logs, and to gracefully
handle the many transient errors that can arise when monitoring CT.
Closes: #63Closes: #37Closes: #32 (presumably by eliminating $DNS_NAMES and $IP_ADDRESSES)
Closes: #21 (with $WATCH_ITEM)
Closes: #25
Andrew Ayer