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nixpkgs/nixos/modules/programs/iftop.nix

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Nix

{ config, pkgs, lib, ... }:
let
cfg = config.programs.iftop;
in {
options = {
programs.iftop.enable = lib.mkEnableOption "iftop + setcap wrapper";
};
config = lib.mkIf cfg.enable {
environment.systemPackages = [ pkgs.iftop ];
security.wrappers.iftop = {
owner = "root";
group = "root";
capabilities = "cap_net_raw+p";
source = "${pkgs.iftop}/bin/iftop";
};
};
}