2014-04-14 15:26:48 +01:00
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{ config, lib, pkgs, ... }:
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2009-10-12 17:36:19 +01:00
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2014-04-14 15:26:48 +01:00
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with lib;
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2007-01-10 17:09:00 +00:00
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2008-02-01 12:01:27 +00:00
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let
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2009-10-12 17:36:19 +01:00
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# Put all the system cronjobs together.
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systemCronJobsFile = pkgs.writeText "system-crontab"
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''
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2009-11-24 14:20:33 +00:00
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SHELL=${pkgs.bash}/bin/bash
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2009-11-24 15:05:08 +00:00
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PATH=${config.system.path}/bin:${config.system.path}/sbin
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2013-10-30 16:37:45 +00:00
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${optionalString (config.services.cron.mailto != null) ''
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MAILTO="${config.services.cron.mailto}"
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''}
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2011-11-03 19:04:54 +00:00
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NIX_CONF_DIR=/etc/nix
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2014-05-05 19:58:51 +01:00
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${lib.concatStrings (map (job: job + "\n") config.services.cron.systemCronJobs)}
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2009-10-12 17:36:19 +01:00
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'';
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2010-10-10 12:08:10 +01:00
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# Vixie cron requires build-time configuration for the sendmail path.
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cronNixosPkg = pkgs.cron.override {
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# The mail.nix nixos module, if there is any local mail system enabled,
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# should have sendmail in this path.
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sendmailPath = "/var/setuid-wrappers/sendmail";
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};
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2011-09-14 19:20:50 +01:00
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2015-07-22 14:02:07 +01:00
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allFiles =
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optional (config.services.cron.systemCronJobs != []) systemCronJobsFile
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++ config.services.cron.cronFiles;
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2014-10-01 16:22:21 +01:00
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2009-10-12 17:36:19 +01:00
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in
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{
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###### interface
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2008-02-01 12:01:27 +00:00
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2008-11-09 16:44:43 +00:00
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options = {
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2011-09-14 19:20:50 +01:00
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2009-10-12 17:36:19 +01:00
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services.cron = {
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2008-11-09 16:44:43 +00:00
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2010-10-10 12:14:02 +01:00
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enable = mkOption {
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2013-10-30 16:37:45 +00:00
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type = types.bool;
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2010-10-10 12:14:02 +01:00
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default = true;
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2013-10-30 16:37:45 +00:00
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description = "Whether to enable the Vixie cron daemon.";
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2010-10-10 12:14:02 +01:00
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};
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2009-10-12 17:36:19 +01:00
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mailto = mkOption {
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2013-10-30 16:37:45 +00:00
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type = types.nullOr types.str;
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default = null;
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description = "Email address to which job output will be mailed.";
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2008-11-09 16:44:43 +00:00
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};
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2009-10-12 17:36:19 +01:00
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systemCronJobs = mkOption {
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2013-10-30 16:37:45 +00:00
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type = types.listOf types.str;
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2009-10-12 17:36:19 +01:00
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default = [];
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2013-10-30 16:37:45 +00:00
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example = literalExample ''
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[ "* * * * * test ls -l / > /tmp/cronout 2>&1"
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"* * * * * eelco echo Hello World > /home/eelco/cronout"
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]
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'';
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2009-10-12 17:36:19 +01:00
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description = ''
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A list of Cron jobs to be appended to the system-wide
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crontab. See the manual page for crontab for the expected
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format. If you want to get the results mailed you must setuid
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sendmail. See <option>security.setuidOwners</option>
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If neither /var/cron/cron.deny nor /var/cron/cron.allow exist only root
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will is allowed to have its own crontab file. The /var/cron/cron.deny file
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is created automatically for you. So every user can use a crontab.
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2010-10-10 12:35:15 +01:00
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Many nixos modules set systemCronJobs, so if you decide to disable vixie cron
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and enable another cron daemon, you may want it to get its system crontab
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based on systemCronJobs.
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2009-10-12 17:36:19 +01:00
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'';
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};
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2014-10-01 16:22:21 +01:00
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cronFiles = mkOption {
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type = types.listOf types.path;
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default = [];
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description = ''
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A list of extra crontab files that will be read and appended to the main
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crontab file when the cron service starts.
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'';
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};
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2008-11-09 16:44:43 +00:00
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};
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2011-09-14 19:20:50 +01:00
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2008-11-09 16:44:43 +00:00
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};
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2008-12-07 12:27:46 +00:00
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2009-10-12 17:36:19 +01:00
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###### implementation
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2008-11-09 16:44:43 +00:00
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2015-07-22 14:02:07 +01:00
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config = mkMerge [
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2008-02-01 13:56:36 +00:00
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2015-07-22 14:12:47 +01:00
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{ services.cron.enable = mkDefault (allFiles != []); }
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2008-11-09 16:44:43 +00:00
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2015-07-24 17:15:37 +01:00
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(mkIf (config.services.cron.enable) {
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2008-11-09 16:44:43 +00:00
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2015-07-22 14:02:07 +01:00
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security.setuidPrograms = [ "crontab" ];
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2011-11-25 16:32:54 +00:00
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2015-07-22 14:02:07 +01:00
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environment.systemPackages = [ cronNixosPkg ];
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2014-10-01 16:22:21 +01:00
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2015-07-22 14:12:47 +01:00
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environment.etc.crontab =
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{ source = pkgs.runCommand "crontabs" { inherit allFiles; }
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''
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touch $out
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for i in $allFiles; do
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cat "$i" >> $out
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done
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'';
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mode = "0600"; # Cron requires this.
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};
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2015-07-22 14:02:07 +01:00
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systemd.services.cron =
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{ description = "Cron Daemon";
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2009-04-03 16:14:00 +01:00
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2015-07-22 14:02:07 +01:00
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wantedBy = [ "multi-user.target" ];
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2009-10-12 17:36:19 +01:00
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2015-07-22 14:02:07 +01:00
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preStart =
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''
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mkdir -m 710 -p /var/cron
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# By default, allow all users to create a crontab. This
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# is denoted by the existence of an empty cron.deny file.
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if ! test -e /var/cron/cron.allow -o -e /var/cron/cron.deny; then
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touch /var/cron/cron.deny
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fi
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'';
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restartTriggers = [ config.environment.etc.localtime.source ];
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serviceConfig.ExecStart = "${cronNixosPkg}/bin/cron -n";
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};
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})
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];
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2011-09-14 19:20:50 +01:00
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2007-01-10 17:09:00 +00:00
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}
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