nixpkgs/modules/services/system/dbus.nix

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# D-Bus system-wide daemon.
{pkgs, config, ...}:
###### interface
let
inherit (pkgs.lib) mkOption;
options = {
services = {
dbus = {
enable = mkOption {
default = true;
description = "
Whether to start the D-Bus message bus daemon. It is required
by the HAL service.
";
merge = pkgs.lib.mergeEnableOption;
};
services = mkOption {
default = [];
description = ".. fill me ..";
};
};
};
};
in
###### implementation
let
cfg = config.services.dbus;
services = cfg.services;
inherit (pkgs.lib) mkIf;
inherit (pkgs) stdenv dbus;
homeDir = "/var/run/dbus";
# Take the standard system configuration file, except that we don't
# want to fork (Upstart will monitor the daemon).
configFile = stdenv.mkDerivation {
name = "dbus-conf";
buildCommand = "
ensureDir $out
ln -s ${dbus}/etc/dbus-1/system.conf $out/system.conf
ensureDir $out/system.d
for i in ${toString services}; do
ln -s $i/etc/dbus-1/system.d/* $out/system.d/
done
";
};
user = {
name = "messagebus";
uid = (import ../../../system/ids.nix).uids.messagebus;
description = "D-Bus system message bus daemon user";
home = homeDir;
};
job = {
name = "dbus";
job = ''
description "D-Bus system message bus daemon"
start on startup
stop on shutdown
start script
mkdir -m 0755 -p ${homeDir}
chown messagebus ${homeDir}
mkdir -m 0755 -p /var/lib/dbus
${dbus.tools}/bin/dbus-uuidgen --ensure
rm -f ${homeDir}/pid
${dbus}/bin/dbus-daemon --config-file=${configFile}/system.conf
end script
respawn sleep 1000000
stop script
pid=$(cat ${homeDir}/pid)
if test -n "$pid"; then
kill -9 $pid
fi
end script
'';
};
in
mkIf cfg.enable {
require = [
# ../upstart-jobs/default.nix # config.services.extraJobs
# ../system/user.nix # users.*
# ? # config.environment.extraPackages
options
];
environment = {
extraPackages = [dbus.daemon dbus.tools];
};
users = {
extraUsers = [user];
};
services = {
extraJobs = [job];
};
}