T o n g wrote: > How does cron decide whom the email will send to? It sends mail to the owner of the crontab. Who's crontab are you talking about?
/etc/crontab <= root crontabs BSD style
/etc/cron.d/* <= system crontabs Vixie Cron style
/var/spool/cron/crontabs/* <= user crontabs System V style
Note that /etc/cron.{daily,hourly,monthly} are chained from
/etc/crontab and are not built into vixie-cron.
Mail is sent to the process owner. Effectively the same as 'whoami'
would return. This silly example shows what I mean.
whoami
echo I am $(whoami) | mailx -s 'Who am I?' $(whoami)
> I know setting MAILTO is effective for individual crontab jobs, since the
> whole cron job will be run under a single user id. But how about the cron
> jobs under /etc/cron.d/?
Those have an extra field to specify the user. The sixth field is the
user that the job will run under. Since that is the user then that is
where the mail is sent.
> I know normally cron will send emails to whoever the job is owned/
> launched by, but if I put a MAILTO at the top of the file, will all
> emails be then sent to my designated MAILTO user id, instead of to
> different users that own/launch the jobs?
Yes. That is a Vixie cron specific feature. It does not exist in
either the old System V or BSD cron daemons.
Bob
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