82 lines
2 KiB
Nix
82 lines
2 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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inherit (pkgs) ifplugd;
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cfg = config.networking.interfaceMonitor;
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# The ifplugd action script, which is called whenever the link
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# status changes (i.e., a cable is plugged in or unplugged).
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plugScript = pkgs.writeScript "ifplugd.action"
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''
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#! ${pkgs.stdenv.shell}
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iface="$1"
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status="$2"
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${cfg.commands}
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'';
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in
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{
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###### interface
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options = {
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networking.interfaceMonitor.enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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If <literal>true</literal>, monitor Ethernet interfaces for
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cables being plugged in or unplugged. When this occurs, the
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commands specified in
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<option>networking.interfaceMonitor.commands</option> are
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executed.
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'';
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};
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networking.interfaceMonitor.beep = mkOption {
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type = types.bool;
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default = false;
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description = ''
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If <literal>true</literal>, beep when an Ethernet cable is
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plugged in or unplugged.
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'';
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};
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networking.interfaceMonitor.commands = mkOption {
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type = types.lines;
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default = "";
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description = ''
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Shell commands to be executed when the link status of an
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interface changes. On invocation, the shell variable
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<varname>iface</varname> contains the name of the interface,
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while the variable <varname>status</varname> contains either
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<literal>up</literal> or <literal>down</literal> to indicate
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the new status.
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'';
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};
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};
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###### implementation
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config = mkIf cfg.enable {
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systemd.services.ifplugd = {
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description = "Network interface connectivity monitor";
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after = [ "network-interfaces.target" ];
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wantedBy = [ "multi-user.target" ];
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script = ''
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${ifplugd}/sbin/ifplugd --no-daemon --no-startup --no-shutdown \
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${if config.networking.interfaceMonitor.beep then "" else "--no-beep"} \
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--run ${plugScript}
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'';
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};
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environment.systemPackages = [ ifplugd ];
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};
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}
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