nixpkgs/modules/system/boot/systemd-unit-options.nix
Eelco Dolstra 1a82024dd8 In the tests, don't start agetty on /dev/ttyS0
Running agetty on ttyS0 interferes with the backdoor, which uses ttyS0
as its standard error.  After agetty starts, writes to the stderr file
descriptor will return EIO (though doing "exec 2>/proc/self/fd/2" will
miracuously fix this).

http://hydra.nixos.org/build/3252782
2012-10-29 21:10:00 +01:00

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{ config, pkgs }:
with pkgs.lib;
rec {
unitOptions = {
enable = mkOption {
default = true;
types = types.bool;
description = ''
If set to false, this unit will be a symlink to
/dev/null. This is primarily useful to prevent specific
template instances (e.g. <literal>serial-getty@ttyS0</literal>)
from being started.
'';
};
description = mkOption {
default = "";
types = types.uniq types.string;
description = "Description of this unit used in systemd messages and progress indicators.";
};
requires = mkOption {
default = [];
types = types.listOf types.string;
description = ''
Start the specified units when this unit is started, and stop
this unit when the specified units are stopped or fail.
'';
};
wants = mkOption {
default = [];
types = types.listOf types.string;
description = ''
Start the specified units when this unit is started.
'';
};
after = mkOption {
default = [];
types = types.listOf types.string;
description = ''
If the specified units are started at the same time as
this unit, delay this unit until they have started.
'';
};
before = mkOption {
default = [];
types = types.listOf types.string;
description = ''
If the specified units are started at the same time as
this unit, delay them until this unit has started.
'';
};
bindsTo = mkOption {
default = [];
types = types.listOf types.string;
description = ''
Like requires, but in addition, if the specified units
unexpectedly disappear, this unit will be stopped as well.
'';
};
partOf = mkOption {
default = [];
types = types.listOf types.string;
description = ''
If the specified units are stopped or restarted, then this
unit is stopped or restarted as well.
'';
};
wantedBy = mkOption {
default = [];
types = types.listOf types.string;
description = "Units that want (i.e. depend on) this unit.";
};
unitConfig = mkOption {
default = {};
example = { RequiresMountsFor = "/data"; };
type = types.attrs;
description = ''
Each attribute in this set specifies an option in the
<literal>[Unit]</literal> section of the unit. See
<citerefentry><refentrytitle>systemd.unit</refentrytitle>
<manvolnum>5</manvolnum></citerefentry> for details.
'';
};
restartTriggers = mkOption {
default = [];
description = ''
An arbitrary list of items such as derivations. If any item
in the list changes between reconfigurations, the service will
be restarted.
'';
};
};
serviceOptions = unitOptions // {
environment = mkOption {
default = {};
type = types.attrs;
example = { PATH = "/foo/bar/bin"; LANG = "nl_NL.UTF-8"; };
description = "Environment variables passed to the services's processes.";
};
path = mkOption {
default = [];
apply = ps: "${makeSearchPath "bin" ps}:${makeSearchPath "sbin" ps}";
description = ''
Packages added to the service's <envar>PATH</envar>
environment variable. Both the <filename>bin</filename>
and <filename>sbin</filename> subdirectories of each
package are added.
'';
};
serviceConfig = mkOption {
default = {};
example =
{ StartLimitInterval = 10;
RestartSec = 5;
};
type = types.attrs;
description = ''
Each attribute in this set specifies an option in the
<literal>[Service]</literal> section of the unit. See
<citerefentry><refentrytitle>systemd.service</refentrytitle>
<manvolnum>5</manvolnum></citerefentry> for details.
'';
};
script = mkOption {
type = types.uniq types.string;
default = "";
description = "Shell commands executed as the service's main process.";
};
preStart = mkOption {
type = types.string;
default = "";
description = ''
Shell commands executed before the service's main process
is started.
'';
};
postStart = mkOption {
type = types.string;
default = "";
description = ''
Shell commands executed after the service's main process
is started.
'';
};
postStop = mkOption {
type = types.string;
default = "";
description = ''
Shell commands executed after the service's main process
has exited.
'';
};
restartIfChanged = mkOption {
type = types.bool;
default = true;
description = ''
Whether the service should be restarted during a NixOS
configuration switch if its definition has changed.
'';
};
};
socketOptions = unitOptions // {
socketConfig = mkOption {
default = {};
example = { ListenStream = "/run/my-socket"; };
type = types.attrs;
description = ''
Each attribute in this set specifies an option in the
<literal>[Socket]</literal> section of the unit. See
<citerefentry><refentrytitle>systemd.socket</refentrytitle>
<manvolnum>5</manvolnum></citerefentry> for details.
'';
};
};
}