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mpd service: Start when needed and harden

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This commit is contained in:
Johannes Frankenau 2017-06-30 23:51:42 +02:00
parent e7ab7798f1
commit c4528eb4cc
1 changed files with 34 additions and 1 deletions
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35
nixos/modules/services/audio/mpd.nix
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@ -44,6 +44,16 @@ in {
'';
};
startWhenNeeded = mkOption {
type = types.bool;
default = false;
description = ''
If set, <command>mpd</command> is socket-activated; that
is, instead of having it permanently running as a daemon,
systemd will start it on the first incoming connection.
'';
};
musicDirectory = mkOption {
type = types.path;
default = "${cfg.dataDir}/music";
@ -123,10 +133,23 @@ in {
config = mkIf cfg.enable {
systemd.sockets.mpd = mkIf cfg.startWhenNeeded {
description = "Music Player Daemon Socket";
wantedBy = [ "sockets.target" ];
listenStreams = [
"${optionalString (cfg.network.listenAddress != "any") "${cfg.network.listenAddress}:"}${toString cfg.network.port}"
];
socketConfig = {
Backlog = 5;
KeepAlive = true;
PassCredentials = true;
};
};
systemd.services.mpd = {
after = [ "network.target" "sound.target" ];
description = "Music Player Daemon";
wantedBy = [ "multi-user.target" ];
wantedBy = optional (!cfg.startWhenNeeded) "multi-user.target";
preStart = ''
mkdir -p "${cfg.dataDir}" && chown -R ${cfg.user}:${cfg.group} "${cfg.dataDir}"
@ -136,6 +159,16 @@ in {
User = "${cfg.user}";
PermissionsStartOnly = true;
ExecStart = "${pkgs.mpd}/bin/mpd --no-daemon ${mpdConf}";
Type = "notify";
LimitRTPRIO = 50;
LimitRTTIME = "infinity";
ProtectSystem = true;
NoNewPrivileges = true;
ProtectKernelTunables = true;
ProtectControlGroups = true;
ProtectKernelModules = true;
RestrictAddressFamilies = "AF_INET AF_INET6 AF_UNIX AF_NETLINK";
RestrictNamespaces = true;
};
};