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106 lines
3.0 KiB
Nix
106 lines
3.0 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.signald;
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dataDir = "/var/lib/signald";
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defaultUser = "signald";
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in
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{
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options.services.signald = {
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enable = mkEnableOption (lib.mdDoc "the signald service");
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user = mkOption {
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type = types.str;
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default = defaultUser;
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description = lib.mdDoc "User under which signald runs.";
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};
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group = mkOption {
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type = types.str;
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default = defaultUser;
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description = lib.mdDoc "Group under which signald runs.";
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};
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socketPath = mkOption {
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type = types.str;
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default = "/run/signald/signald.sock";
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description = lib.mdDoc "Path to the signald socket";
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};
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};
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config = mkIf cfg.enable {
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users.users = optionalAttrs (cfg.user == defaultUser) {
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${defaultUser} = {
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group = cfg.group;
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isSystemUser = true;
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};
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};
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users.groups = optionalAttrs (cfg.group == defaultUser) {
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${defaultUser} = { };
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};
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systemd.services.signald = {
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description = "A daemon for interacting with the Signal Private Messenger";
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wants = [ "network.target" ];
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wantedBy = [ "multi-user.target" ];
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after = [ "network.target" ];
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serviceConfig = {
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User = cfg.user;
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Group = cfg.group;
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ExecStart = "${pkgs.signald}/bin/signald -d ${dataDir} -s ${cfg.socketPath}";
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Restart = "on-failure";
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StateDirectory = "signald";
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RuntimeDirectory = "signald";
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StateDirectoryMode = "0750";
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RuntimeDirectoryMode = "0750";
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BindReadOnlyPaths = [
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"/nix/store"
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"-/etc/resolv.conf"
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"-/etc/nsswitch.conf"
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"-/etc/hosts"
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"-/etc/localtime"
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];
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CapabilityBoundingSet = "";
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# ProtectClock= adds DeviceAllow=char-rtc r
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DeviceAllow = "";
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# Use a static user so other applications can access the files
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#DynamicUser = true;
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LockPersonality = true;
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# Needed for java
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#MemoryDenyWriteExecute = true;
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NoNewPrivileges = true;
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PrivateDevices = true;
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PrivateMounts = true;
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# Needs network access
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#PrivateNetwork = true;
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PrivateTmp = true;
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PrivateUsers = true;
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ProcSubset = "pid";
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ProtectClock = true;
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ProtectHome = true;
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ProtectHostname = true;
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# Would re-mount paths ignored by temporary root
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#ProtectSystem = "strict";
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ProtectControlGroups = true;
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ProtectKernelLogs = true;
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ProtectKernelModules = true;
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ProtectKernelTunables = true;
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ProtectProc = "invisible";
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RestrictAddressFamilies = [ "AF_INET" "AF_INET6" "AF_UNIX" ];
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RestrictNamespaces = true;
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RestrictRealtime = true;
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RestrictSUIDSGID = true;
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SystemCallArchitectures = "native";
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SystemCallFilter = [ "@system-service" "~@privileged @resources @setuid @keyring" ];
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TemporaryFileSystem = "/:ro";
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# Does not work well with the temporary root
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#UMask = "0066";
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};
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};
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};
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}
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