Add fallback UID range options at compile-time

Signed-off-by: AnErrupTion <anerruption@disroot.org>

build.zig

@@ -44,6 +44,8 @@ pub fn build(b: *std.Build) !void {
     const enable_x11_support = b.option(bool, "enable_x11_support", "Enable X11 support (default is on)") orelse true;
     const default_tty = b.option(u8, "default_tty", "Set the TTY (default is 2)") orelse 2;
     const fallback_tty = b.option(u8, "fallback_tty", "Set the fallback TTY (default is 2). This value gets embedded into the binary") orelse 2;
+    const fallback_uid_min = b.option(std.posix.uid_t, "fallback_uid_min", "Set the fallback minimum UID (default is 1000). This value gets embedded into the binary") orelse 2;
+    const fallback_uid_max = b.option(std.posix.uid_t, "fallback_uid_max", "Set the fallback maximum UID (default is 60000). This value gets embedded into the binary") orelse 2;
 
     default_tty_str = try std.fmt.allocPrint(b.allocator, "{d}", .{default_tty});
 
@@ -52,6 +54,8 @@ pub fn build(b: *std.Build) !void {
     build_options.addOption([]const u8, "version", version_str);
     build_options.addOption(u8, "tty", default_tty);
     build_options.addOption(u8, "fallback_tty", fallback_tty);
+    build_options.addOption(std.posix.uid_t, "fallback_uid_min", fallback_uid_min);
+    build_options.addOption(std.posix.uid_t, "fallback_uid_max", fallback_uid_max);
     build_options.addOption(bool, "enable_x11_support", enable_x11_support);
 
     const target = b.standardTargetOptions(.{});

res/lang/ar.ini

@@ -50,6 +50,7 @@ err_sleep = فشل في تنفيذ أمر sleep
 
 err_tty_ctrl = فشل في نقل تحكم الطرفية (TTY)
 
+
 err_user_gid = فشل في تعيين معرّف المجموعة (GID) للمستخدم
 err_user_init = فشل في تهيئة بيانات المستخدم
 err_user_uid = فشل في تعيين معرّف المستخدم (UID)

res/lang/cat.ini

@@ -50,6 +50,7 @@ err_pwnam = error en obtenir la informació de l'usuari
 
 
 
+
 err_user_gid = error en establir el GID de l'usuari
 err_user_init = error en inicialitzar usuari
 err_user_uid = error en establir l'UID de l'usuari

res/lang/cs.ini

@@ -50,6 +50,7 @@ err_pwnam = nelze získat informace o uživateli
 
 
 
+
 err_user_gid = nastavení GID uživatele selhalo
 err_user_init = inicializace uživatele selhala
 err_user_uid = nastavení UID uživateli selhalo

res/lang/de.ini

@@ -50,6 +50,7 @@ err_sleep = Sleep-Befehl fehlgeschlagen
 
 err_tty_ctrl = Fehler bei der TTY-Uebergabe
 
+
 err_user_gid = Fehler beim Setzen der Gruppen-ID
 err_user_init = Nutzer-Initialisierung fehlgeschlagen
 err_user_uid = Setzen der Benutzer-ID fehlgeschlagen

res/lang/en.ini

@@ -11,7 +11,7 @@ err_brightness_change = failed to change brightness
 err_chdir = failed to open home folder
 err_clock_too_long = clock string too long
 err_config = unable to parse config file
-
+err_crawl = failed to crawl session directories
 err_dgn_oob = log message
 err_domain = invalid domain
 err_empty_password = empty password not allowed
@@ -50,6 +50,7 @@ err_battery = failed to load battery status
 err_switch_tty = failed to switch tty
 err_tty_ctrl = tty control transfer failed
 err_no_users = no users found
+err_uid_range = failed to dynamically get uid range
 err_user_gid = failed to set user GID
 err_user_init = failed to initialize user
 err_user_uid = failed to set user UID

res/lang/es.ini

@@ -50,6 +50,7 @@ err_pwnam = error al obtener la información del usuario
 
 
 
+
 err_user_gid = error al establecer el GID del usuario
 err_user_init = error al inicializar usuario
 err_user_uid = error al establecer el UID del usuario

res/lang/fr.ini

@@ -50,6 +50,7 @@ err_battery = échec de lecture de l'état de la batterie
 err_switch_tty = échec du changement de terminal
 err_tty_ctrl = échec du transfert de contrôle du terminal
 err_no_users = aucun utilisateur trouvé
+err_uid_range = échec de récupération dynamique de la plage d'UID
 err_user_gid = échec de modification du GID
 err_user_init = échec d'initialisation de l'utilisateur
 err_user_uid = échec de modification du UID

res/lang/it.ini

@@ -50,6 +50,7 @@ err_pwnam = impossibile ottenere dati utente
 
 
 
+
 err_user_gid = impossibile impostare GID utente
 err_user_init = impossibile inizializzare utente
 err_user_uid = impossible impostare UID utente

res/lang/ja_JP.ini

@@ -50,6 +50,7 @@ err_sleep = スリープコマンドの実行に失敗しました
 
 err_tty_ctrl = TTY制御の転送に失敗しました
 
+
 err_user_gid = ユーザーGIDの設定に失敗しました
 err_user_init = ユーザーの初期化に失敗しました
 err_user_uid = ユーザーUIDの設定に失敗しました

res/lang/lv.ini

@@ -50,6 +50,7 @@ err_battery = neizdevās ielādēt akumulatora stāvokli
 err_switch_tty = neizdevās pārslēgt tty
 err_tty_ctrl = tty vadības nodošana neizdevās
 err_no_users = lietotāji nav atrasti
+
 err_user_gid = neizdevās iestatīt lietotāja GID
 err_user_init = neizdevās inicializēt lietotāju
 err_user_uid = neizdevās iestatīt lietotāja UID

res/lang/pl.ini

@@ -50,6 +50,7 @@ err_battery = nie udało się sprawdzić statusu baterii
 err_switch_tty = nie można przełączyć tty
 err_tty_ctrl = nie udało się przekazać kontroli tty
 err_no_users = nie znaleziono żadnego użytkownika
+
 err_user_gid = nie udało się ustawić GID użytkownika
 err_user_init = nie udało się zainicjalizować użytkownika
 err_user_uid = nie udało się ustawić UID użytkownika

res/lang/pt.ini

@@ -50,6 +50,7 @@ err_pwnam = erro ao obter informação do utilizador
 
 
 
+
 err_user_gid = erro ao definir o GID do utilizador
 err_user_init = erro ao iniciar o utilizador
 err_user_uid = erro ao definir o UID do utilizador

res/lang/pt_BR.ini

@@ -50,6 +50,7 @@ err_pwnam = não foi possível obter informações do usuário
 
 
 
+
 err_user_gid = não foi possível definir o GID do usuário
 err_user_init = não foi possível iniciar o usuário
 err_user_uid = não foi possível definir o UID do usuário

res/lang/ro.ini

@@ -59,6 +59,7 @@ err_perm_user = nu s-a putut face downgrade permisiunilor de utilizator
 
 
 
+
 login = utilizator
 logout = opreşte sesiunea
 

res/lang/ru.ini

@@ -50,6 +50,7 @@ err_battery = не удалось получить статус батареи
 err_switch_tty = не удалось переключить tty
 err_tty_ctrl = передача управления tty не удалась
 err_no_users = пользователи не найдены
+
 err_user_gid = не удалось установить GID пользователя
 err_user_init = не удалось инициализировать пользователя
 err_user_uid = не удалось установить UID пользователя

res/lang/sr.ini

@@ -50,6 +50,7 @@ err_pwnam = neuspijesno skupljanje informacija o korisniku
 
 
 
+
 err_user_gid = neuspijesno postavljanje korisničkog GID-a
 err_user_init = neuspijensa inicijalizacija korisnika
 err_user_uid = neuspijesno postavljanje UID-a korisnika

res/lang/sv.ini

@@ -50,6 +50,7 @@ err_pwnam = misslyckades att hämta användarinfo
 
 
 
+
 err_user_gid = misslyckades att ställa in användar-GID
 err_user_init = misslyckades att initialisera användaren
 err_user_uid = misslyckades att ställa in användar-UID

res/lang/tr.ini

@@ -50,6 +50,7 @@ err_pwnam = kullanici bilgileri alinamadi
 
 
 
+
 err_user_gid = kullanici icin GID ayarlanamadi
 err_user_init = kullanici oturumu baslatilamadi
 err_user_uid = kullanici icin UID ayarlanamadi

res/lang/uk.ini

@@ -50,6 +50,7 @@ err_pwnam = не вдалося отримати дані користувача
 
 
 
+
 err_user_gid = не вдалося змінити GID користувача
 err_user_init = не вдалося ініціалізувати користувача
 err_user_uid = не вдалося змінити UID користувача

res/lang/zh_CN.ini

@@ -50,6 +50,7 @@ err_pwnam = 获取用户信息失败
 
 
 
+
 err_user_gid = 设置用户GID失败
 err_user_init = 初始化用户失败
 err_user_uid = 设置用户UID失败

src/config/Lang.zig

@@ -55,6 +55,7 @@ err_battery: []const u8 = "failed to load battery status",
 err_switch_tty: []const u8 = "failed to switch tty",
 err_tty_ctrl: []const u8 = "tty control transfer failed",
 err_no_users: []const u8 = "no users found",
+err_uid_range: []const u8 = "failed to dynamically get uid range",
 err_user_gid: []const u8 = "failed to set user GID",
 err_user_init: []const u8 = "failed to initialize user",
 err_user_uid: []const u8 = "failed to set user UID",

src/main.zig

@@ -26,6 +26,7 @@ const SavedUsers = @import("config/SavedUsers.zig");
 const migrator = @import("config/migrator.zig");
 const SharedError = @import("SharedError.zig");
 const LogFile = @import("LogFile.zig");
+const UidRange = @import("UidRange.zig");
 
 const StringList = std.ArrayListUnmanaged([]const u8);
 const Ini = ini.Ini;
@@ -219,7 +220,8 @@ pub fn main() !void {
         migrator.lateConfigFieldHandler(&config);
     }
 
-    var usernames = try getAllUsernames(allocator, config.login_defs_path);
+    var maybe_uid_range_error: ?anyerror = null;
+    var usernames = try getAllUsernames(allocator, config.login_defs_path, &maybe_uid_range_error);
     defer {
         for (usernames.items) |username| allocator.free(username);
         usernames.deinit(allocator);
@@ -344,6 +346,11 @@ pub fn main() !void {
         try log_writer.print("unable to parse argument '{s}{s}': {s}\n", .{ longest.kind.prefix(), longest.name, @errorName(arg_parse_error) });
     }
 
+    if (maybe_uid_range_error) |err| {
+        try info_line.addMessage(lang.err_uid_range, config.error_bg, config.error_fg);
+        try log_writer.print("failed to get uid range: {s}; falling back to default\n", .{@errorName(err)});
+    }
+
     if (maybe_config_load_error) |err| {
         // We can't localize this since the config failed to load so we'd fallback to the default language anyway
         try info_line.addMessage("unable to parse config file", config.error_bg, config.error_fg);
@@ -1277,8 +1284,14 @@ fn findSessionByName(session: *Session, name: []const u8) ?usize {
     return null;
 }
 
-fn getAllUsernames(allocator: std.mem.Allocator, login_defs_path: []const u8) !StringList {
+fn getAllUsernames(allocator: std.mem.Allocator, login_defs_path: []const u8, uid_range_error: *?anyerror) !StringList {
-    const uid_range = try interop.getUserIdRange(allocator, login_defs_path);
+    const uid_range = interop.getUserIdRange(allocator, login_defs_path) catch |err| no_uid_range: {
+        uid_range_error.* = err;
+        break :no_uid_range UidRange{
+            .uid_min = build_options.fallback_uid_min,
+            .uid_max = build_options.fallback_uid_max,
+        };
+    };
 
     var usernames: StringList = .empty;
     var maybe_entry = interop.getNextUsernameEntry();