When process started by dcron doesn't exit or fork in background dcron will wait until it exit and until that happens it doesn't check for crontab updates (/var/spool/cron/crontabs/cron.update). This is security issue because any user may add this to his crontab: * * * * * sleep 86400 and in next 24 hours no one (including root) will be able to update their crontabs.
(In reply to Alex Efros from comment #0) > When process started by dcron doesn't exit or fork in background dcron will > wait until it exit and until that happens it doesn't check for crontab > updates (/var/spool/cron/crontabs/cron.update). > > This is security issue because any user may add this to his crontab: > * * * * * sleep 86400 Not _any_ user. It would be a security issue if you trusted all users to set a crontab, but we already have the cron group for that.
This is an upstream issue I think http://www.jimpryor.net/linux/dcron.html
