138 lines
4.2 KiB
Nix
138 lines
4.2 KiB
Nix
{pkgs, config, ...}:
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###### interface
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let
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inherit (pkgs.lib) mkOption concatStringsSep;
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inherit (pkgs) writeText;
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options = {
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services = {
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fcron = {
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enable = mkOption {
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default = false;
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description = ''Whether to enable the `fcron' daemon.
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From its docs: "fcron does both the job of Vixie Cron and anacron, but does even more and better".
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It can trigger actions even if the event has passed due to shutdown for example.
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TODO: add supoprt for fcron.allow and fcron.deny
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Of course on cron daemon is enough.. So if fcron works fine there should be a system option systemCron="fcron or cron"
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There are (or have been) some security issues.
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I haven't yet checked wether they have been resolved.
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For now you should trust the users registering crontab files.
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I think gentoo has them listed.
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'';
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};
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allow = mkOption {
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default = [];
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description = ''
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Users allowed to use fcrontab and fcrondyn (one name per line, special name "all" acts for everyone)
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nix adds username "root" for you.
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'';
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};
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deny = mkOption {
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default = [];
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description = " same as allow but deny ";
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};
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maxSerialJobs = mkOption {
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default = 1;
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description = "maximum number of serial jobs which can run simultaneously (-m)";
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};
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queuelen = mkOption {
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default = "";
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description = "number of jobs the serial queue and the lavg queue can contain - empty to net set this number (-q)";
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};
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systab = mkOption {
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default = "";
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description = ''
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The "system" crontab contents..
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'';
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};
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};
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};
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};
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in
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###### implementation
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let
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# Put all the system cronjobs together.
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# TODO allow using fcron only..
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#systemCronJobs =
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# config.services.cron.systemCronJobs;
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cfg = config.services.fcron;
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ifEnabled = if cfg.enable then pkgs.lib.id else (x : []);
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queuelen = if cfg.queuelen == "" then "" else "-q ${toString cfg.queuelen}";
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# shell is set to /sh in config..
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# ${pkgs.lib.concatStrings (map (job: job + "\n") systemCronJobs)}
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systemCronJobsFile = pkgs.writeText "fcron-systab" ''
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SHELL=${pkgs.bash}/bin/sh
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PATH=${pkgs.coreutils}/bin:${pkgs.findutils}/bin:${pkgs.gnused}/bin
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'';
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allowdeny = target: users : {
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source = writeText "fcron.${target}" (concatStringsSep "\n" users);
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target = "fcron.${target}";
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mode = "600"; # fcron has some security issues.. So I guess this is most safe
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};
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in
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{
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require = [
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# (import ../upstart-jobs/default.nix) # config.services.extraJobs
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# (import ?) # config.time.timeZone
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# (import ?) # config.environment.etc
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# (import ?) # config.environment.extraPackages
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# (import ?) # config.environment.cleanStart
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options
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];
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environment = {
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etc = ifEnabled [
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(allowdeny "allow" (["root"] ++ cfg.allow))
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(allowdeny "deny" cfg.deny)
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# see man 5 fcron.conf
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{ source = writeText "fcon.conf" ''
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fcrontabs = /var/spool/fcron
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pidfile = /var/run/fcron.pid
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fifofile = /var/run/fcron.fifo
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fcronallow = /etc/fcron.allow
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fcrondeny = /etc/fcron.deny
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shell = /bin/sh
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sendmail = /var/setuid-wrappers/sendmail
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editor = /var/run/current-system/sw/bin/vi
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'';
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target = "fcron.conf";
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mode = "0600"; # max allowed is 644
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}
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];
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extraPackages = ifEnabled (
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pkgs.lib.optional
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(!config.environment.cleanStart)
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pkgs.fcron);
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};
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services = {
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extraJobs = ifEnabled [{
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name = "fcron";
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job = ''
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description "fcron daemon"
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start on startup
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stop on shutdown
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env PATH=/var/run/current-system/sw/bin
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start script
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${pkgs.coreutils}/bin/mkdir -m 0700 -p /var/spool/fcron
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# load system crontab file
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${pkgs.fcron}/bin/fcrontab -u systab ${writeText "systab" cfg.systab}
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end script
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respawn ${pkgs.fcron}/sbin/fcron -f -m ${toString cfg.maxSerialJobs} ${queuelen}
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'';
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}];
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};
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}
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