On 11/18/2010 07:09 AM, Stephen Gallagher wrote:
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On 11/17/2010 04:51 PM, Adam Young wrote:
On 11/17/2010 04:31 PM, Simo Sorce wrote:
On Wed, 17 Nov 2010 16:07:24 -0500
Stephen Gallagher<sgall...@redhat.com> wrote:
This will require two changes to the HBAC schema. First of all, we
plan to drop the week-of-the-month concept entirely and replace it
with septet-of-the-month. This is being done to eliminate the
ambiguity entirely. Secondly, we will need to describe
day-of-the-septet in the grammar (where the day of the septet
describes the name of the weekday, and not its numerical position
within the septet, as that would be a useless and complex duplication
of the day-of-the-month concept).
I think we can keep using 1-7 in the septet with the
understanding that 1 is always Monday, 2 is always Tuesday and so on.
Simo.
I'd like to propose that we have a goal to be as close to the Cron
grammar as practicable. So we should allow 0 or 7 for Sunday. This is in
keeping with your proposal.
Here are the examples from the crontab 5 manpage;
# run five minutes after midnight, every day
5 0 * * * $HOME/bin/daily.job>> $HOME/tmp/out 2>&1
# run at 2:15pm on the first of every month -- output mailed to paul
15 14 1 * * $HOME/bin/monthly
# run at 10 pm on weekdays, annoy Joe
0 22 * * 1-5 mail -s "It’s 10pm" joe%Joe,%%Where are your kids?%
23 0-23/2 * * * echo "run 23 minutes after midn, 2am, 4am ..., everyday"
5 4 * * sun echo "run at 5 after 4 every sunday"
I'm not sure that 'First Wednesday of the month' is possible with this
grammar, either. Yet, somehow, it has survived many years.
0 8 1-7 * 3 (read, 08:00 on the Wednesday that falls between the 1st
and 7th day of the 6th month)
Yep: except you meant every month.
field allowed values
----- --------------
minute 0-59
hour 0-23
day of month 1-31
month 1-12 (or names, see below)
day of week 0-7 (0 or 7 is Sun, or use names)
OK. So we add a duration to this grammar, declare victory and go home.
I propose adding a hyphen and then duration in days:hours:minutes
0 8 1-7 * 3 : 0:0:30 #from 8 - 8:30
0 8 1-7 * 3 : 0:2:0 #from 8 - 10:
0 8 1-7 * 3 : 2:0:0 #For 48 hours
- --
Stephen Gallagher
RHCE 804006346421761
Delivering value year after year.
Red Hat ranks #1 in value among software vendors.
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