123 lines
3 KiB
Nix
123 lines
3 KiB
Nix
{ config, pkgs, ... }:
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with pkgs.lib;
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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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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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# ${pkgs.lib.concatStrings (map (job: job + "\n") systemCronJobs)}
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systemCronJobsFile = pkgs.writeText "fcron-systab"
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''
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SHELL=${pkgs.bash}/bin/sh
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PATH=${pkgs.coreutils}/bin:${pkgs.findutils}/bin:${pkgs.gnused}/bin
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'';
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allowdeny = target: users:
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{ source = pkgs.writeText "fcron.${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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###### interface
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options = {
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services.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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};
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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, "all" for everyone).
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'';
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};
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deny = mkOption {
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default = [];
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description = "Users forbidden from using fcron.";
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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.";
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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 = ''The "system" crontab contents.'';
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};
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};
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};
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###### implementation
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config = mkIf cfg.enable {
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environment.etc =
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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 = pkgs.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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environment.systemPackages = [ pkgs.fcron ];
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jobs.fcron =
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{ description = "fcron daemon";
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startOn = "startup";
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stopOn = "shutdown";
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environment =
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{ PATH = "/var/run/current-system/sw/bin";
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};
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preStart =
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''
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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 ${pkgs.writeText "systab" cfg.systab}
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'';
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exec = "${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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