On 5/28/2013 6:01 PM, Kenta Suzumoto wrote:
Hi. Is there no built-in way of making "sleep" sleep in increments
of minutes, hours, etc? The GNU "sleep" can be invoked like "sleep
1h" for an hour. The FreeBSD one's manpage leads me to believe we
can only use seconds, which is kind of annoying. Is there an
undocmented or missing feature here? Seems really trivial to
implement.
~ $ sleep 1h
usage: sleep seconds
You think it's trivial until you read this:
http://infiniteundo.com/post/25326999628/falsehoods-programmers-believe-about-time
If you sleep one hour, do you sleep one hour from now or one hour from
the system clock which may change in the next hour? If it's the system
clock, you may sleep for ten minutes or ten hours. If you need to sleep
for 3600 seconds, that's simple and understandable.
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