[Bug 191304] New: Improve cron(8)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=191304

            Bug ID: 191304
           Summary: Improve cron(8)
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: Needs Triage
          Severity: Affects Only Me
          Priority: ---
         Component: bin
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: tmwalaszek at gmail.com

Created attachment 144064
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=144064&action=edit
Patch against HEAD

Hello,
I saw on the FreeBSD Ideas page topic about cron :).
I've started updating the 'original' FreeBSD cron from sources to vixi cron
4.1. I think (well I hope :P) most of the features that were done in FreeBSD
cron are now ported into vixi cron 4.1, there are unfortunately some missing
features at the moment:
- @every_second - this need to be done
- -s and -o, in vixi cron 4.1 daylight time switches are enabled by default, at
the moment there is no -s and -o options. So you need to remove '-s' from the
cron rc script

I've also added one feature from OpenBSD, crontab is poking cron using
unix-domain socket so we don't need to have suid on crontab.

Path is in the attachment (it was done against freebsd HEAD). I'm testing it on
my FreeBSD box and it looks good but anyway don't try it on production machines
:).

After the installation we have to do a few things:
- Add crontab group
- Change group to crontab on /var/cron/tabs
- Add sticky bit on /var/cron/tabs
- Add group write permissions on /var/cron/tabs

This is still work in progress but if someone could have a look on this and
give me some feedback it would be great.

Regards,
Tomasz Walaszek

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