OT: Cron question
alvin at Maggie.Linux-Consulting.com
alvin at Maggie.Linux-Consulting.com
Fri Feb 15 16:40:15 PST 2002
hi ya
maybe i am misunderstanding...
if days-of-month(date) < 7... than run job B
otherwise job A
crontab -e
...
# 1:01am first 7 days of the month
1 1 1-7 * * /usr/local/scripts/JobB -job dothis
#
# 2:15am from 8th - 31st of the month
15 02 8-31 * * /usr/local/scripts/JobA -job somethingElse
have fun
alvin
http://www.Linux-Backup.net ... lots'o backup scripts ...
#
# format of fields
#
# MIN HOUR DAY MONTH DAYOFWEEK COMMAND
# --- ---- --- ----- --------- -----------
...
# Sat at 1:01am
# 1 01 * * 6 weekly backup on sat
# Sun at 2:01am
# 1 02 * * 0 full backup on su
On Sat, 16 Feb 2002, [iso-8859-1] Jakob Østergaard wrote:
> On Fri, Feb 15, 2002 at 06:15:46PM -0600, gj wrote:
> > use cron as a front to a script which uses formatted output from date to
> >
> > check the day of the week, if Fri
> > check day of the month, if <=7
> > execute job B
> > otherwise
> > execute job A
> >
> > This could be implemented in Bourne shell script in a few minutes.
> >
> > Cron doesn't really have any flow control capabilities. Scripting is
> > the only way to go.
> ...
>
> Thanks - ok, several people have suggested this, and in fact I did the script
> almost immediately after the first suggestion. Just for the record, here goes
> a script to make the Amanda backup system run one backup set every first friday
> in the month, and another set all other days.
>
> It is assumed that cron runs the script as root, and with the arguments "check"
> early in the day (to see if the right tape is available), and "backup" later on
> for the real backup.
>
> Use and abuse as you see fit :)
>
> ---------------------------8<------------------
> #!/bin/bash
> #
> # This script will either check tapes or perform
> # a backup of some particular backup set, depending
> # on the date, and on the argument given:
> #
> # argument "check" causes the script to check for tapes
> # argument "backup" causes the script to run the backup
> #
> # the first friday in the month, the script will use "FullSet"
> # on all other days it will use "DailySet"
> #
> DAILYSET="DailySet"
> FULLSET="FullSet"
>
> # 0 is sunday, 0-6
> DAYOFWEEK=`date +%w`
>
> # 1-31
> DAYOFMONTH=`date +%d`
>
> # Is this a friday ?
> if [ $DAYOFWEEK -eq 5 ]; then
> # Is this the first week of the month ?
> if [ $DAYOFMONTH -lt 8 ]; then
> USESET=$FULLSET
> else
> USESET=$DAILYSET
> fi
> else
> USESET=$DAILYSET
> fi
>
> # Check args
> case "$1" in
> check)
> COMMAND="/usr/sbin/amcheck -m $USESET"
> ;;
> backup)
> COMMAND="/usr/sbin/amdump $USESET && (/usr/sbin/amverify $USESET &> /dev/null)"
> ;;
> test)
> COMMAND="echo \"Will run backup set \\\"$USESET\\\"\""
> ;;
> *)
> echo "Must use either check, backup, or test as argument"
> exit 1
> esac
>
> # echo "$COMMAND"
> su amanda -c "$COMMAND"
> ---------------------------8<------------------
>
>
> --
> ................................................................
> : jakob at unthought.net : And I see the elder races, :
> :.........................: putrid forms of man :
> : Jakob Østergaard : See him rise and claim the earth, :
> : OZ9ABN : his downfall is at hand. :
> :.........................:............{Konkhra}...............:
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