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|
{ config, lib, pkgs, utils, ... }:
let
cfg = config.systemd.sysusers;
userCfg = config.users;
sysusersConfig = pkgs.writeTextDir "00-nixos.conf" ''
# Type Name ID GECOS Home directory Shell
# Users
${lib.concatLines (lib.mapAttrsToList
(username: opts:
let
uid = if opts.uid == null then "-" else toString opts.uid;
in
''u ${username} ${uid}:${opts.group} "${opts.description}" ${opts.home} ${utils.toShellPath opts.shell}''
)
userCfg.users)
}
# Groups
${lib.concatLines (lib.mapAttrsToList
(groupname: opts: ''g ${groupname} ${if opts.gid == null then "-" else toString opts.gid}'') userCfg.groups)
}
# Group membership
${lib.concatStrings (lib.mapAttrsToList
(groupname: opts: (lib.concatMapStrings (username: "m ${username} ${groupname}\n")) opts.members ) userCfg.groups)
}
'';
staticSysusersCredentials = pkgs.runCommand "static-sysusers-credentials" { } ''
mkdir $out; cd $out
${lib.concatLines (
(lib.mapAttrsToList
(username: opts: "echo -n '${opts.initialHashedPassword}' > 'passwd.hashed-password.${username}'")
(lib.filterAttrs (_username: opts: opts.initialHashedPassword != null) userCfg.users))
++
(lib.mapAttrsToList
(username: opts: "echo -n '${opts.initialPassword}' > 'passwd.plaintext-password.${username}'")
(lib.filterAttrs (_username: opts: opts.initialPassword != null) userCfg.users))
++
(lib.mapAttrsToList
(username: opts: "cat '${opts.hashedPasswordFile}' > 'passwd.hashed-password.${username}'")
(lib.filterAttrs (_username: opts: opts.hashedPasswordFile != null) userCfg.users))
)
}
'';
staticSysusers = pkgs.runCommand "static-sysusers"
{
nativeBuildInputs = [ pkgs.systemd ];
} ''
mkdir $out
export CREDENTIALS_DIRECTORY=${staticSysusersCredentials}
systemd-sysusers --root $out ${sysusersConfig}/00-nixos.conf
'';
in
{
options = {
# This module doesn't set it's own user options but reuses the ones from
# users-groups.nix
systemd.sysusers = {
enable = lib.mkEnableOption (lib.mdDoc "systemd-sysusers") // {
description = lib.mdDoc ''
If enabled, users are created with systemd-sysusers instead of with
the custom `update-users-groups.pl` script.
Note: This is experimental.
'';
};
};
};
config = lib.mkIf cfg.enable {
assertions = [
{
assertion = config.system.activationScripts.users == "";
message = "system.activationScripts.users has to be empty to use systemd-sysusers";
}
{
assertion = config.users.mutableUsers -> config.system.etc.overlay.enable;
message = "config.users.mutableUsers requires config.system.etc.overlay.enable.";
}
];
systemd = lib.mkMerge [
({
# Create home directories, do not create /var/empty even if that's a user's
# home.
tmpfiles.settings.home-directories = lib.mapAttrs'
(username: opts: lib.nameValuePair opts.home {
d = {
mode = opts.homeMode;
user = username;
group = opts.group;
};
})
(lib.filterAttrs (_username: opts: opts.home != "/var/empty") userCfg.users);
})
(lib.mkIf config.users.mutableUsers {
additionalUpstreamSystemUnits = [
"systemd-sysusers.service"
];
services.systemd-sysusers = {
# Enable switch-to-configuration to restart the service.
unitConfig.ConditionNeedsUpdate = [ "" ];
requiredBy = [ "sysinit-reactivation.target" ];
before = [ "sysinit-reactivation.target" ];
restartTriggers = [ "${config.environment.etc."sysusers.d".source}" ];
serviceConfig = {
LoadCredential = lib.mapAttrsToList
(username: opts: "passwd.hashed-password.${username}:${opts.hashedPasswordFile}")
(lib.filterAttrs (_username: opts: opts.hashedPasswordFile != null) userCfg.users);
SetCredential = (lib.mapAttrsToList
(username: opts: "passwd.hashed-password.${username}:${opts.initialHashedPassword}")
(lib.filterAttrs (_username: opts: opts.initialHashedPassword != null) userCfg.users))
++
(lib.mapAttrsToList
(username: opts: "passwd.plaintext-password.${username}:${opts.initialPassword}")
(lib.filterAttrs (_username: opts: opts.initialPassword != null) userCfg.users))
;
};
};
})
];
environment.etc = lib.mkMerge [
(lib.mkIf (!userCfg.mutableUsers) {
"passwd" = {
source = "${staticSysusers}/etc/passwd";
mode = "0644";
};
"group" = {
source = "${staticSysusers}/etc/group";
mode = "0644";
};
"shadow" = {
source = "${staticSysusers}/etc/shadow";
mode = "0000";
};
"gshadow" = {
source = "${staticSysusers}/etc/gshadow";
mode = "0000";
};
})
(lib.mkIf userCfg.mutableUsers {
"sysusers.d".source = sysusersConfig;
})
];
};
meta.maintainers = with lib.maintainers; [ nikstur ];
}
|