nixpkgs/modules/services/scheduling/cron.nix
Eelco Dolstra 60b3f95ad8 * Move the definition of the set of system packages to
modules/config/system-path.nix.  system/system.nix is now almost
  empty.
* Removed the cleanStart option - it should be possible to get the
  same functionality by overriding config.system.path (or defining
  config.system.systemPackages with a higher priority - don't know if
  that works though).

svn path=/nixos/branches/modular-nixos/; revision=15727
2009-05-25 17:41:03 +00:00

103 lines
2.6 KiB
Nix

{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 <option>security.setuidOwners</option>
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
inherit (config.services) jobsTags;
# 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}"
${pkgs.lib.concatStrings (map (job: job + "\n") systemCronJobs)}
'';
in
{
require = [
# ../upstart-jobs/default.nix # config.services.extraJobs
# ? # config.time.timeZone
# ? # config.environment.etc
# ? # config.environment.extraPackages
options
];
environment = {
etc = [
# The system-wide crontab.
{ source = systemCronJobsFile;
target = "crontab";
mode = "0600"; # Cron requires this.
}
];
extraPackages = [pkgs.cron];
};
services = {
extraJobs = [{
name = "cron";
job = ''
description "Cron daemon"
start on startup
stop on shutdown
# Needed to interpret times in the local timezone.
env TZ=${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
'';
}];
};
}