mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-11-16 14:54:29 +01:00
afde028672
This is a very simple module that installs a single udev rule. The rule set the ownership of all /dev/i2c-* devices to a group, "i2c" by default but can be changed. The "uaccess" tag also makes systemd add an ACL for users with a seat[1]. Fix issue #91771 [1]: https://enotty.pipebreaker.pl/2012/05/23/linux-automatic-user-acl-management/
43 lines
932 B
Nix
43 lines
932 B
Nix
{ config, lib, ... }:
|
|
|
|
with lib;
|
|
|
|
let
|
|
cfg = config.hardware.i2c;
|
|
in
|
|
|
|
{
|
|
options.hardware.i2c = {
|
|
enable = mkEnableOption ''
|
|
i2c devices support. By default access is granted to users in the "i2c"
|
|
group (will be created if non-existent) and any user with a seat, meaning
|
|
logged on the computer locally.
|
|
'';
|
|
|
|
group = mkOption {
|
|
type = types.str;
|
|
default = "i2c";
|
|
description = ''
|
|
Grant access to i2c devices (/dev/i2c-*) to users in this group.
|
|
'';
|
|
};
|
|
};
|
|
|
|
config = mkIf cfg.enable {
|
|
|
|
boot.kernelModules = [ "i2c-dev" ];
|
|
|
|
users.groups = mkIf (cfg.group == "i2c") {
|
|
i2c = { };
|
|
};
|
|
|
|
services.udev.extraRules = ''
|
|
# allow group ${cfg.group} and users with a seat use of i2c devices
|
|
ACTION=="add", KERNEL=="i2c-[0-9]*", TAG+="uaccess", GROUP="${cfg.group}", MODE="660"
|
|
'';
|
|
|
|
};
|
|
|
|
meta.maintainers = [ maintainers.rnhmjoj ];
|
|
|
|
}
|