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