On 2009-04-23, Sjoerd Hardeman <sjo...@lorentz.leidenuniv.nl> wrote:
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> Kurian Thayil wrote:
>> Hi All,
>> =EF=BF=BD
>> I have 3 cron jobs enabled and all are relating to RSYNC. Now, all of=20
>> these scripts are run once in every 7 minutes all day. The problem=20
>> occurs when the scripts doesn't finish to execute in 7 minutes. This=20
>> will result in starting execution of the same script again and this wil=
> l=20
>> malfunction the setup.
>>=20
>> Is there an option in CRON, which always check if CRON has started the =
>
>> process and is already running? Cron should execute the script only if =
>
>> the the process isn't running already. Any hints on this?
> You could create a lockfile
> touch /var/lock/cronfiletest
> and the test if this lockfile exists, or else exit
> test -f /var/lock/cronfiletest || exit 0
Should it be this?
test -f /var/lock/cronfiletest && exit 0
if you want to exit when the lock file exist.
> You'll find similar tricks in many cron and init scripts.
>
> Sjoerd
>
> PS. Kurian, my apologies for the message sent to you. Hit the 'reply'=20
> vs. 'reply to list' button accidentally.
>
>
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