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{ config, pkgs, ... }:
with import <stockholm/lib>;
{
options.lass.xjail = mkOption {
type = types.attrsOf (types.submodule ({ config, ...}: {
options = {
user = mkOption {
type = types.string;
default = "nobody";
};
groups = mkOption {
type = types.listOf types.str;
default = [];
};
name = mkOption {
type = types.string;
default = config._module.args.name;
};
display = mkOption {
type = types.string;
default = toString (genid_signed config._module.args.name);
};
script = mkOption {
type = types.path;
default = pkgs.writeScript "echo_lol" "echo lol";
};
from = mkOption {
type = types.string;
default = "lass";
};
};
}));
default = {};
};
options.lass.xjail-bins = mkOption {
type = types.attrsOf types.path;
};
# implementation
config = {
users.users = mapAttrs' (_: cfg:
nameValuePair cfg.name {
uid = genid cfg.name;
home = "/home/${cfg.name}";
useDefaultShell = true;
createHome = true;
extraGroups = cfg.groups;
}
) config.lass.xjail;
users.groups = mapAttrs' (_: cfg:
nameValuePair cfg.name {
members = [
cfg.name
cfg.from
];
}
) config.lass.xjail;
security.sudo.extraConfig = (concatStringsSep "\n" (mapAttrsToList (_: cfg:
# TODO allow just the right script with sudo
"${cfg.from} ALL=(${cfg.name}) NOPASSWD: ALL"
) config.lass.xjail));
lass.xjail-bins = mapAttrs' (name: cfg:
let
sudo-wrapper = pkgs.writeScript name ''
/var/run/wrappers/bin/sudo -u ${cfg.name} -i ${cfg.script} "$@"
'';
in nameValuePair name (pkgs.writeScriptBin cfg.name ''
export NDISPLAY=${cfg.display}
DISPLAY=:$NDISPLAY ${pkgs.xorg.xrandr}/bin/xrandr
if test $? -eq 0; then
echo xephyr already running
export DISPLAY=:$NDISPLAY
${sudo-wrapper} "$@"
else
echo xephyr not running
DROP_TO_USER=${cfg.name} ${pkgs.xephyrify}/bin/xephyrify ${sudo-wrapper} "$@"
fi
'')
) config.lass.xjail;
};
}
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