nixpkgs/modules/services/system/dbus.nix
Peter Simons 20b364f4de Reverting revisions 30103-30106: "always set nixpkgs.config.{state,store}Dir", etc.
After the change from revision 30103, nixos-rebuild suddenly consumed
freaky amounts of memory. I had to abort the process after it had
allocated well in excess of 30GB(!) of RAM. I'm not sure what is causing
this behavior, but undoing that assignment fixes the problem. The other
two commits needed to be revoked, too, because they depend on 30103.

svn path=/nixos/trunk/; revision=30127
2011-10-30 15:19:58 +00:00

167 lines
4.2 KiB
Nix

# D-Bus configuration and system bus daemon.
{ config, pkgs, ... }:
with pkgs.lib;
let
cfg = config.services.dbus;
homeDir = "/var/run/dbus";
configDir = pkgs.stdenv.mkDerivation {
name = "dbus-conf";
buildCommand = ''
ensureDir $out
cp -v ${pkgs.dbus_daemon}/etc/dbus-1/system.conf $out/system.conf
# !!! Hm, these `sed' calls are rather error-prone...
# Tell the daemon where the setuid wrapper around
# dbus-daemon-launch-helper lives.
sed -i $out/system.conf \
-e 's|<servicehelper>.*/libexec/dbus-daemon-launch-helper|<servicehelper>${config.security.wrapperDir}/dbus-daemon-launch-helper|'
# Add the system-services and system.d directories to the system
# bus search path.
sed -i $out/system.conf \
-e 's|<standard_system_servicedirs/>|${systemServiceDirs}|' \
-e 's|<includedir>system.d</includedir>|${systemIncludeDirs}|'
cp ${pkgs.dbus_daemon}/etc/dbus-1/session.conf $out/session.conf
# Add the services and session.d directories to the session bus
# search path.
sed -i $out/session.conf \
-e 's|<standard_session_servicedirs />|${sessionServiceDirs}&|' \
-e 's|<includedir>session.d</includedir>|${sessionIncludeDirs}|'
''; # */
};
systemServiceDirs = concatMapStrings
(d: "<servicedir>${d}/share/dbus-1/system-services</servicedir> ")
cfg.packages;
systemIncludeDirs = concatMapStrings
(d: "<includedir>${d}/etc/dbus-1/system.d</includedir> ")
cfg.packages;
sessionServiceDirs = concatMapStrings
(d: "<servicedir>${d}/share/dbus-1/services</servicedir> ")
cfg.packages;
sessionIncludeDirs = concatMapStrings
(d: "<includedir>${d}/etc/dbus-1/session.d</includedir> ")
cfg.packages;
in
{
###### interface
options = {
services.dbus = {
enable = mkOption {
default = true;
description = ''
Whether to start the D-Bus message bus daemon, which is
required by many other system services and applications.
'';
merge = pkgs.lib.mergeEnableOption;
};
packages = mkOption {
default = [];
description = ''
Packages whose D-Bus configuration files should be included in
the configuration of the D-Bus system-wide message bus.
Specifically, every file in
<filename><replaceable>pkg</replaceable>/etc/dbus-1/system.d</filename>
is included.
'';
};
};
};
###### implementation
config = mkIf cfg.enable {
environment.systemPackages = [ pkgs.dbus_daemon pkgs.dbus_tools ];
environment.etc = singleton
{ source = configDir;
target = "dbus-1";
};
users.extraUsers = singleton
{ name = "messagebus";
uid = config.ids.uids.messagebus;
description = "D-Bus system message bus daemon user";
home = homeDir;
group = "messagebus";
};
users.extraGroups = singleton
{ name = "messagebus";
gid = config.ids.gids.messagebus;
};
jobs.dbus =
{ startOn = "started udev and started syslogd";
preStart =
''
mkdir -m 0755 -p ${homeDir}
chown messagebus ${homeDir}
mkdir -m 0755 -p /var/lib/dbus
${pkgs.dbus_tools}/bin/dbus-uuidgen --ensure
rm -f ${homeDir}/pid
'';
daemonType = "fork";
exec = "${pkgs.dbus_daemon}/bin/dbus-daemon --system";
postStop =
''
# !!! Hack: doesn't belong here.
pid=$(cat /var/run/ConsoleKit/pid || true)
if test -n "$pid"; then
kill $pid || true
rm -f /var/run/ConsoleKit/pid
fi
'';
};
security.setuidOwners = singleton
{ program = "dbus-daemon-launch-helper";
source = "${pkgs.dbus_daemon}/libexec/dbus-daemon-launch-helper";
owner = "root";
group = "messagebus";
setuid = true;
setgid = false;
permissions = "u+rx,g+rx,o-rx";
};
services.dbus.packages =
[ "/nix/var/nix/profiles/default"
config.system.path
];
environment.pathsToLink = [ "/etc/dbus-1" "/share/dbus-1" ];
};
}