Re: Applescript schedulers
Re: Applescript schedulers
- Subject: Re: Applescript schedulers
- From: Paul Scott <email@hidden>
- Date: Sun, 18 Nov 2007 16:32:28 -0800
when the MBP is sleeping when the "event time" nothing happens.
How do you handle this problem?
With anacron for example. See <http://en.wikipedia.org/wiki/Anacron>.
On Leopard, and I think Tiger IIRC, the cron job will run *after* the
machine wakes from sleep if it was sleeping when it should have run.
I just now ran a test to prove it.
crontab:
4 * * * * echo "Hello world!"
The job should run at 4 minutes after the hour.
I slept the computer at 2 minutes after the hour. Then, at just shy of
8 minutes after the hour I woke up the computer. The job ran and e-
mailed
me the results (notice the time):
From: hidden email (Cron Daemon)
To: hidden email
Subject: Cron <pscott@paul-scotts-imac> echo "Hello world!"
X-Cron-Env: <SHELL=/bin/sh>
X-Cron-Env: <PATH=/usr/bin:/bin>
X-Cron-Env: <LOGNAME=pscott>
X-Cron-Env: <USER=pscott>
X-Cron-Env: <HOME=/Users/pscott>
Message-Id: <20071119000759.C9997122709@hidden-email>
Date: Sun, 18 Nov 2007 16:07:59 -0800 (PST)
Hello world!
This is, of course, different than what happens with cron on BSD, and
I don't
know what tolerance OS X's cron uses, but I do recall that when I was
running
Tiger, my jobs that were scheduled to run at 8a.m. were sitting in my
e-mail
inbox when I woke up the machine at 9:30a.m., although I never actually
checked the run time and it's possible that they had run because the
machine
woke up for some other reason (wake-on-lan or wake-on-modem). Still,
this
recent test on Leopard shows that cron won't ignore a job that wasn't
run
during sleep. There are potential problems with this approach if you
weren't
expecting it. I suggest you run your own tests and compensate as
required.
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