146 lines
3.9 KiB
Nix
146 lines
3.9 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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clamavUser = "clamav";
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stateDir = "/var/lib/clamav";
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runDir = "/run/clamav";
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clamavGroup = clamavUser;
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cfg = config.services.clamav;
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pkg = pkgs.clamav;
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clamdConfigFile = pkgs.writeText "clamd.conf" ''
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DatabaseDirectory ${stateDir}
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LocalSocket ${runDir}/clamd.ctl
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PidFile ${runDir}/clamd.pid
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TemporaryDirectory /tmp
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User clamav
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Foreground yes
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${cfg.daemon.extraConfig}
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'';
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freshclamConfigFile = pkgs.writeText "freshclam.conf" ''
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DatabaseDirectory ${stateDir}
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Foreground yes
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Checks ${toString cfg.updater.frequency}
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${cfg.updater.extraConfig}
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DatabaseMirror database.clamav.net
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'';
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in
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{
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options = {
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services.clamav = {
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daemon = {
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enable = mkEnableOption "ClamAV clamd daemon";
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extraConfig = mkOption {
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type = types.lines;
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default = "";
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description = ''
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Extra configuration for clamd. Contents will be added verbatim to the
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configuration file.
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'';
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};
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};
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updater = {
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enable = mkEnableOption "ClamAV freshclam updater";
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frequency = mkOption {
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type = types.int;
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default = 12;
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description = ''
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Number of database checks per day.
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'';
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};
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interval = mkOption {
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type = types.str;
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default = "hourly";
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description = ''
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How often freshclam is invoked. See systemd.time(7) for more
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information about the format.
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'';
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};
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extraConfig = mkOption {
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type = types.lines;
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default = "";
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description = ''
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Extra configuration for freshclam. Contents will be added verbatim to the
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configuration file.
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'';
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};
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};
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};
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};
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config = mkIf (cfg.updater.enable || cfg.daemon.enable) {
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environment.systemPackages = [ pkg ];
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users.users = singleton {
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name = clamavUser;
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uid = config.ids.uids.clamav;
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group = clamavGroup;
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description = "ClamAV daemon user";
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home = stateDir;
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};
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users.groups = singleton {
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name = clamavGroup;
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gid = config.ids.gids.clamav;
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};
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environment.etc."clamav/freshclam.conf".source = freshclamConfigFile;
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environment.etc."clamav/clamd.conf".source = clamdConfigFile;
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systemd.services.clamav-daemon = mkIf cfg.daemon.enable {
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description = "ClamAV daemon (clamd)";
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after = optional cfg.updater.enable "clamav-freshclam.service";
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requires = optional cfg.updater.enable "clamav-freshclam.service";
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wantedBy = [ "multi-user.target" ];
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restartTriggers = [ clamdConfigFile ];
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preStart = ''
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mkdir -m 0755 -p ${runDir}
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chown ${clamavUser}:${clamavGroup} ${runDir}
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'';
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serviceConfig = {
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ExecStart = "${pkg}/bin/clamd";
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ExecReload = "${pkgs.coreutils}/bin/kill -USR2 $MAINPID";
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PrivateTmp = "yes";
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PrivateDevices = "yes";
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PrivateNetwork = "yes";
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};
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};
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systemd.timers.clamav-freshclam = mkIf cfg.updater.enable {
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description = "Timer for ClamAV virus database updater (freshclam)";
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wantedBy = [ "timers.target" ];
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timerConfig = {
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OnCalendar = cfg.updater.interval;
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Unit = "clamav-freshclam.service";
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};
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};
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systemd.services.clamav-freshclam = mkIf cfg.updater.enable {
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description = "ClamAV virus database updater (freshclam)";
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restartTriggers = [ freshclamConfigFile ];
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preStart = ''
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mkdir -m 0755 -p ${stateDir}
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chown ${clamavUser}:${clamavGroup} ${stateDir}
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'';
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serviceConfig = {
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Type = "oneshot";
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ExecStart = "${pkg}/bin/freshclam";
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SuccessExitStatus = "1"; # if databases are up to date
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PrivateTmp = "yes";
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PrivateDevices = "yes";
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};
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};
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};
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}
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