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The at(1) code is now more tightly integrated into the cron codebase.
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cron. When ISC cron 5.0 is out the integration will be even tighter.
Also rename /var/cron/{allow,deny} -> /var/cron/cron.{allow,deny}
for consistency with POSIX and at.{allow,deny} and install an empty
cron.deny file (as we do at.deny) since crontab will require this
in the near future for POSIX compliance.
After a "make build" you can update your system as follows:
# mv /var/at/* /var/cron
# mv /var/cron/jobs /var/cron/atjobs
# mv /var/cron.allow /var/cron/cron.allow
# mv /var/cron.deny /var/cron/cron.deny
# rm -rf /var/at
# kill `cat /var/run/cron.pid` ; cron
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long-standing annoyance that atrun's granularity is 10 minutes.
Most at jobs run with a 1 minute granularity. Jobs submitted via
"at now" or "batch" will run immediately. Includes a rewritten
cron(8) man page. at(1) will be integrated more closely into
cron at a future date.
Upgrading notes:
the atrun job in root's crontab should be removed.
the /var/at/spool directory is no longer used
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concatenation at compile time rather than run time.
o Some minor cosmetic changes to simplify diffing.
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These changes were modelled after the Owl version of vixie-cron,
but developed independently.
Our crontab used to send cron SIGUSR1 to tell cron to reread the
spool dir. Now that crontab is not setuid root this doesn't work.
Instead, crontab pokes cron via a Unix domain socket located in the
tabs dir.
Please note, after these changes, the owner on user crontab files
will have to be changed manually from root to the uid of the
corresponding user for crontab to be usable. cron itself will accept
tab files owned by either root or the user.
Also, any /var/cron/{allow,deny} files must be readable by group crontab.
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Change an unsafe vfork() to fork()
Fix dup2() usage--must check for oldd == newd case and no need to close oldd
Fixes annoying messages from sendmail about stdout being closed.
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I also fixed the signal handlers while I was at it.
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