cron with extended feature

[Alexander Milovanov]

Hello,

In crontab I can set values for the day of the week: 0-6, for example
00 03 * * 3,6 csh -c '_command_'

I need to schedule some jobs on each fourth Friday. (Something like 00 03 * * 1-6/4 csh -c '_command_')
I think I cannot set such value in standard HP-UX cron, but maybe you know any tools to do that?

Thanks.

[Pete Randall]

You need to put that logic in your script. You could test the day of the month to see if it is greater than 21, for example.


Pete

[RAC_1]

You can not do that with cron. Search forums data hammer. This is tool developed by AC Clay for such things. Else, you need to put it for every froday and check if a friday is 4th, then execute your script.

[Arturo Galbiati · Accepted solution]

Hi,
you cannot do teh same using crontab only.
You have to write a wrapper script (sheduled to run every day in crontab or better every Friday) that checks about teh 4th Friday of teh month and if this is the case start your script.

#!/usr/bin/ksh
set -A Friday $(cal|awk 'NR>3 {print $6}'|grep -v ^$)
integer friday4=${Friday[3]}
integer today=$(echo $(date +%d)+0|bc)
if [[ $today = $friday4 ]]
then
echo "Today is the 4th friday of teh month"
#run your script here
fi

HTH,
Art

[Alexander Milovanov]

Thanks a lot