{pkgs, config, ...}: ###### interface let inherit (pkgs.lib) mkOption; options = { services = { cron = { mailto = mkOption { default = ""; description = " The job output will be mailed to this email address. "; }; systemCronJobs = mkOption { default = []; example = [ "* * * * * test ls -l / > /tmp/cronout 2>&1" "* * * * * eelco echo Hello World > /home/eelco/cronout" ]; description = '' A list of Cron jobs to be appended to the system-wide crontab. See the manual page for crontab for the expected format. If you want to get the results mailed you must setuid sendmail. See If neither /var/cron/cron.deny nor /var/cron/cron.allow exist only root will is allowed to have its own crontab file. The /var/cron/cron.deny file is created automatically for you. So every user can use a crontab. ''; }; }; }; }; in ###### implementation let # Put all the system cronjobs together. systemCronJobs = config.services.cron.systemCronJobs; systemCronJobsFile = pkgs.writeText "system-crontab" '' SHELL=${pkgs.bash}/bin/sh PATH=${pkgs.coreutils}/bin:${pkgs.findutils}/bin:${pkgs.gnused}/bin:${pkgs.su}/bin MAILTO="${config.services.cron.mailto}" ${pkgs.lib.concatStrings (map (job: job + "\n") systemCronJobs)} ''; in { require = [ # (import ../upstart-jobs/default.nix) # config.services.extraJobs # (import ?) # config.time.timeZone # (import ?) # config.environment.etc # (import ?) # config.environment.extraPackages # (import ?) # config.environment.cleanStart options ]; environment = { etc = [ # The system-wide crontab. { source = systemCronJobsFile; target = "crontab"; mode = "0600"; # Cron requires this. } ]; extraPackages = pkgs.lib.optional (!config.environment.cleanStart) pkgs.cron; }; services = { extraJobs = [{ name = "cron"; job = '' description "Cron daemon" start on startup stop on shutdown # Needed to interpret times in the local timezone. env TZ=${config.time.timeZone} start script mkdir -m 710 -p /var/cron # By default, allow all users to create a crontab. This # is denoted by the existence of an empty cron.deny file. if ! test -e /var/cron/cron.allow -o -e /var/cron/cron.deny; then touch /var/cron/cron.deny fi end script respawn ${pkgs.cron}/sbin/cron -n ''; }]; }; }