Propellor.Property.Cron

Documentation

data Times

When to run a cron job.

The Daily, Monthly, and Weekly options allow the cron job to be run by anacron, which is useful for non-servers.

Constructors

Times String

formatted as in crontab(5)

Daily

Weekly

Monthly

job :: Desc -> Times -> User -> FilePath -> String -> Property DebianLike

Installs a cron job, that will run as a specified user in a particular directory. Note that the Desc must be unique, as it is used for the cron job filename.

Only one instance of the cron job is allowed to run at a time, no matter how long it runs. This is accomplished using flock locking of the cron job file.

The cron job's output will only be emailed if it exits nonzero.

niceJob :: Desc -> Times -> User -> FilePath -> String -> Property DebianLike

Installs a cron job, and runs it niced and ioniced.

jobDropped :: Desc -> Times -> Property UnixLike

Removes a cron job created by job or niceJob, as identified by the Desc passed to those properties when the cronjob was set up

Those properties are not revertable because simply removing a cronjob does not undo the changes it might have made to the system, i.e., jobDropped is not in the general case a reversion of job or niceJob

runPropellor :: Times -> RevertableProperty DebianLike UnixLike

Installs a cron job to run propellor.