nixpkgs/nixos/modules/security/pam_usb.nix

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{config, pkgs, ...}:
with pkgs.lib;
let
inherit (pkgs) pam_usb;
cfg = config.security.pam.usb;
anyUsbAuth = any (attrByPath ["usbAuth"] false) (attrValues config.security.pam.services);
in
{
options = {
security.pam.usb = {
enable = mkOption {
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type = types.bool;
default = false;
description = ''
Enable USB login for all login systems that support it. For
more information, visit <link
xlink:href="http://pamusb.org/doc/quickstart#setting_up" />.
'';
};
};
};
config = mkIf (cfg.enable || anyUsbAuth) {
# pmount need to have a set-uid bit to make pam_usb works in user
# environment. (like su, sudo)
security.setuidPrograms = [ "pmount" "pumount" ];
environment.systemPackages = [ pkgs.pmount ];
};
}