103 lines
2.7 KiB
Nix
103 lines
2.7 KiB
Nix
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{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.incron;
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in
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{
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options = {
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services.incron = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether to enable the incron daemon.
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Note that commands run under incrontab only support common Nix profiles for the <envar>PATH</envar> provided variable.
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'';
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};
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allow = mkOption {
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type = types.nullOr (types.listOf types.str);
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default = null;
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description = lib.mdDoc ''
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Users allowed to use incrontab.
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If empty then no user will be allowed to have their own incrontab.
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If `null` then will defer to {option}`deny`.
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If both {option}`allow` and {option}`deny` are null
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then all users will be allowed to have their own incrontab.
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'';
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};
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deny = mkOption {
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type = types.nullOr (types.listOf types.str);
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default = null;
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description = lib.mdDoc "Users forbidden from using incrontab.";
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};
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systab = mkOption {
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type = types.lines;
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default = "";
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description = lib.mdDoc "The system incrontab contents.";
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example = ''
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/var/mail IN_CLOSE_WRITE abc $@/$#
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/tmp IN_ALL_EVENTS efg $@/$# $&
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'';
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};
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extraPackages = mkOption {
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type = types.listOf types.package;
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default = [];
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example = literalExpression "[ pkgs.rsync ]";
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description = lib.mdDoc "Extra packages available to the system incrontab.";
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};
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};
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};
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config = mkIf cfg.enable {
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warnings = optional (cfg.allow != null && cfg.deny != null)
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"If `services.incron.allow` is set then `services.incron.deny` will be ignored.";
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environment.systemPackages = [ pkgs.incron ];
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security.wrappers.incrontab =
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{ setuid = true;
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owner = "root";
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group = "root";
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source = "${pkgs.incron}/bin/incrontab";
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};
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# incron won't read symlinks
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environment.etc."incron.d/system" = {
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mode = "0444";
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text = cfg.systab;
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};
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environment.etc."incron.allow" = mkIf (cfg.allow != null) {
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text = concatStringsSep "\n" cfg.allow;
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};
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environment.etc."incron.deny" = mkIf (cfg.deny != null) {
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text = concatStringsSep "\n" cfg.deny;
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};
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systemd.services.incron = {
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description = "File System Events Scheduler";
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wantedBy = [ "multi-user.target" ];
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path = cfg.extraPackages;
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serviceConfig.PIDFile = "/run/incrond.pid";
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serviceConfig.ExecStartPre = "${pkgs.coreutils}/bin/mkdir -m 710 -p /var/spool/incron";
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serviceConfig.ExecStart = "${pkgs.incron}/bin/incrond --foreground";
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};
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};
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}
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