nixpkgs/modules/services/hardware/hal.nix
Eelco Dolstra 93571df680 * Make sure that hal is really running when the X server starts,
otherwise we could end up without any input devices.

svn path=/nixos/trunk/; revision=16998
2009-09-09 21:22:00 +00:00

111 lines
2.3 KiB
Nix

# HAL daemon.
{pkgs, config, ...}:
with pkgs.lib;
let
cfg = config.services.hal;
inherit (pkgs) hal;
fdi = pkgs.buildEnv {
name = "hal-fdi";
pathsToLink = [ "/share/hal/fdi" ];
paths = cfg.packages;
};
in
{
###### interface
options = {
services.hal = {
enable = mkOption {
default = true;
description = ''
Whether to start the HAL daemon.
'';
};
packages = mkOption {
default = [];
description = ''
Packages containing additional HAL configuration data.
'';
};
};
};
###### implementation
config = mkIf cfg.enable {
environment.systemPackages = [hal];
services.hal.packages = [hal pkgs.hal_info];
users.extraUsers = singleton
{ name = "haldaemon";
uid = config.ids.uids.haldaemon;
description = "HAL daemon user";
};
users.extraGroups = singleton
{ name = "haldaemon";
gid = config.ids.gids.haldaemon;
};
jobs = singleton
{ name = "hal";
description = "HAL daemon";
# !!! TODO: make sure that HAL starts after acpid,
# otherwise hald-addon-acpi will grab /proc/acpi/event.
startOn = if config.powerManagement.enable then "acpid" else "dbus";
stopOn = "shutdown";
# !!! HACK? These environment variables manipulated inside
# 'src'/hald/mmap_cache.c are used for testing the daemon
environment =
{ HAL_FDI_SOURCE_PREPROBE = "${fdi}/share/hal/fdi/preprobe";
HAL_FDI_SOURCE_INFORMATION = "${fdi}/share/hal/fdi/information";
HAL_FDI_SOURCE_POLICY = "${fdi}/share/hal/fdi/policy";
};
preStart =
''
mkdir -m 0755 -p /var/cache/hald
mkdir -m 0755 -p /var/run/hald
rm -f /var/cache/hald/fdi-cache
# !!! Hack: start the daemon here to make sure it's
# running when the Upstart job reaches the "running"
# state. Should be fixable in Upstart 0.6.
${hal}/sbin/hald
'';
postStop =
''
pid=$(cat /var/run/hald/pid)
test -n "$pid" && kill "$pid"
'';
};
services.udev.packages = [hal];
services.dbus.enable = true;
services.dbus.packages = [hal];
};
}