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nixpkgs/nixos/modules/programs/firejail.nix
Aidan Gauland 82dd41e74d firejail: clarify wrappedBinaries option description
I had trouble getting programs.firejail.wrappedBinaries to have any effect on my
system (#152852), because I did not realise that "put[ting] the actual
application binary in the global environment" included adding the program
package to environment.systemPackages, and I thought that the package must be
present for this option to take effect.  I have added a clarifying parenthetical
statement explicitly mentioning environment.systemPackages in this caveat.
2022-01-01 18:13:21 +13:00

98 lines
3 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.programs.firejail;
wrappedBins = pkgs.runCommand "firejail-wrapped-binaries"
{ preferLocalBuild = true;
allowSubstitutes = false;
}
''
mkdir -p $out/bin
${lib.concatStringsSep "\n" (lib.mapAttrsToList (command: value:
let
opts = if builtins.isAttrs value
then value
else { executable = value; profile = null; extraArgs = []; };
args = lib.escapeShellArgs (
(optional (opts.profile != null) "--profile=${toString opts.profile}")
++ opts.extraArgs
);
in
''
cat <<_EOF >$out/bin/${command}
#! ${pkgs.runtimeShell} -e
exec /run/wrappers/bin/firejail ${args} -- ${toString opts.executable} "\$@"
_EOF
chmod 0755 $out/bin/${command}
'') cfg.wrappedBinaries)}
'';
in {
options.programs.firejail = {
enable = mkEnableOption "firejail";
wrappedBinaries = mkOption {
type = types.attrsOf (types.either types.path (types.submodule {
options = {
executable = mkOption {
type = types.path;
description = "Executable to run sandboxed";
example = literalExpression ''"''${lib.getBin pkgs.firefox}/bin/firefox"'';
};
profile = mkOption {
type = types.nullOr types.path;
default = null;
description = "Profile to use";
example = literalExpression ''"''${pkgs.firejail}/etc/firejail/firefox.profile"'';
};
extraArgs = mkOption {
type = types.listOf types.str;
default = [];
description = "Extra arguments to pass to firejail";
example = [ "--private=~/.firejail_home" ];
};
};
}));
default = {};
example = literalExpression ''
{
firefox = {
executable = "''${lib.getBin pkgs.firefox}/bin/firefox";
profile = "''${pkgs.firejail}/etc/firejail/firefox.profile";
};
mpv = {
executable = "''${lib.getBin pkgs.mpv}/bin/mpv";
profile = "''${pkgs.firejail}/etc/firejail/mpv.profile";
};
}
'';
description = ''
Wrap the binaries in firejail and place them in the global path.
</para>
<para>
You will get file collisions if you put the actual application binary in
the global environment (such as by adding the application package to
<code>environment.systemPackages</code>), and applications started via
.desktop files are not wrapped if they specify the absolute path to the
binary.
'';
};
};
config = mkIf cfg.enable {
security.wrappers.firejail =
{ setuid = true;
owner = "root";
group = "root";
source = "${lib.getBin pkgs.firejail}/bin/firejail";
};
environment.systemPackages = [ pkgs.firejail ] ++ [ wrappedBins ];
};
meta.maintainers = with maintainers; [ peterhoeg ];
}