[9fans] Re: cron job

["有澤 健治" <karisawa@gmail.com>]

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On 2021/09/05 16:52, 有澤 健治 wrote:
> Hello all,
>
> I noticed what I donn't understand.
>
> Let alice be a user of a system hebe,
> and try an experiment on cron job.
>
> STEP 1.
> make /usr/alice/tmp/T that looks like:
> hebe# ls -dl /usr/alice/tmp/T
> d-rwxrwxrwx M 24 alice alice 0 Sep  3 01:00 /usr/alice/tmp/T
> hebe#
>
> STEP 2.
> make a rc script /usr/alice/bin/rc/touchtest:
> #!/bin/rc
> rfork e
> d=/usr/alice/tmp/T
> t=`{date -n}
> touch $d/$t
>
> STEP 3.
> make a cron job for alice on /cron/alice/cron such that:
> 0,10,20,30,40,50 * * * * local /usr/alice/bin/rc/touchtest
>
> STEP 4.
> observe files in /usr/alice/tmp/T
> and you can confirm, owner of created files is hostowner, not alice.
> my case:
> hebe% cd /usr/alice/tmp
> hebe% ls -l T
> --rw-rw-rw- M 195329 arisawa alice 0 Sep  3 00:40 T/1630597201
> --rw-rw-rw- M 195329 arisawa alice 0 Sep  3 00:50 T/1630597801
> --rw-rw-rw- M 195329 arisawa alice 0 Sep  3 01:00 T/1630598401
> hebe%
>
> where "arisawa" is the hostowner of "hebe".
> Is this reasonable ?
>
> additional info:
> hebe# ps | grep cron
> arisawa         366    0:00   0:00      128K Sleep    cron
> hebe#
>
> Kenji Arisawa
>

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