feat(Greeter): improved multi-user UI and per-user theme sync

- Introduce multi-account greeter login with per-user theme previews
- Add `dms greeter sync --profile` for secondary users with or without sudo
- Add Manage greeter group membership from Settings UI → Users Tab

core/cmd/dms/commands_greeter.go

@@ -59,22 +59,29 @@ var greeterInstallCmd = &cobra.Command{
 }
 
 var greeterSyncCmd = &cobra.Command{
-	Use:     "sync",
-	Short:   "Sync DMS theme and settings with greeter",
-	Long:    "Synchronize your current user's DMS theme, settings, and wallpaper configuration with the login greeter screen",
-	PreRunE: preRunPrivileged,
+	Use:   "sync",
+	Short: "Sync DMS theme and settings with greeter",
+	Long:  "Synchronize your current user's DMS theme, settings, and wallpaper configuration with the login greeter screen. Also updates a per-user cache slot at users/<username>/ for multi-account greeter theme preview.\n\nUse --profile on secondary accounts to sync only your own users/<username>/ slot without sudo or greetd changes.",
+	PreRunE: func(cmd *cobra.Command, args []string) error {
+		profile, _ := cmd.Flags().GetBool("profile")
+		if profile {
+			return nil
+		}
+		return preRunPrivileged(cmd, args)
+	},
 	Run: func(cmd *cobra.Command, args []string) {
 		yes, _ := cmd.Flags().GetBool("yes")
 		auth, _ := cmd.Flags().GetBool("auth")
 		local, _ := cmd.Flags().GetBool("local")
+		profile, _ := cmd.Flags().GetBool("profile")
 		term, _ := cmd.Flags().GetBool("terminal")
 		if term {
-			if err := syncInTerminal(yes, auth, local); err != nil {
+			if err := syncInTerminal(yes, auth, local, profile); err != nil {
 				log.Fatalf("Error launching sync in terminal: %v", err)
 			}
 			return
 		}
-		if err := syncGreeter(yes, auth, local); err != nil {
+		if err := syncGreeter(yes, auth, local, profile); err != nil {
 			log.Fatalf("Error syncing greeter: %v", err)
 		}
 	},
@@ -85,6 +92,7 @@ func init() {
 	greeterSyncCmd.Flags().BoolP("terminal", "t", false, "Run sync in a new terminal (for entering sudo password); terminal auto-closes when done")
 	greeterSyncCmd.Flags().BoolP("auth", "a", false, "Configure PAM for fingerprint and U2F (adds both if modules exist); overrides UI toggles")
 	greeterSyncCmd.Flags().BoolP("local", "l", false, "Developer mode: force greetd config to use a local DMS checkout path")
+	greeterSyncCmd.Flags().BoolP("profile", "p", false, "Sync only your per-user greeter slot (no sudo; for secondary accounts)")
 }
 
 var greeterEnableCmd = &cobra.Command{
@@ -512,8 +520,8 @@ func runCommandInTerminal(shellCmd string) error {
 	return fmt.Errorf("no terminal emulator found (tried: gnome-terminal, konsole, xfce4-terminal, ghostty, wezterm, alacritty, kitty, xterm)")
 }
 
-func syncInTerminal(nonInteractive bool, forceAuth bool, local bool) error {
-	syncFlags := make([]string, 0, 3)
+func syncInTerminal(nonInteractive bool, forceAuth bool, local bool, profileOnly bool) error {
+	syncFlags := make([]string, 0, 4)
 	if nonInteractive {
 		syncFlags = append(syncFlags, "--yes")
 	}
@@ -523,6 +531,9 @@ func syncInTerminal(nonInteractive bool, forceAuth bool, local bool) error {
 	if local {
 		syncFlags = append(syncFlags, "--local")
 	}
+	if profileOnly {
+		syncFlags = append(syncFlags, "--profile")
+	}
 	shellSyncCmd := "dms greeter sync"
 	if len(syncFlags) > 0 {
 		shellSyncCmd += " " + strings.Join(syncFlags, " ")
@@ -541,7 +552,11 @@ func resolveLocalWrapperShell() (string, error) {
 	return "", fmt.Errorf("could not find bash or sh in PATH for local greeter wrapper")
 }
 
-func syncGreeter(nonInteractive bool, forceAuth bool, local bool) error {
+func syncGreeter(nonInteractive bool, forceAuth bool, local bool, profileOnly bool) error {
+	if profileOnly {
+		return syncGreeterProfileOnly(nonInteractive)
+	}
+
 	if !nonInteractive {
 		fmt.Println("=== DMS Greeter Sync ===")
 		fmt.Println()
@@ -752,6 +767,26 @@ func syncGreeter(nonInteractive bool, forceAuth bool, local bool) error {
 	return nil
 }
 
+func syncGreeterProfileOnly(nonInteractive bool) error {
+	logFunc := func(msg string) {
+		fmt.Println(msg)
+	}
+	if !nonInteractive {
+		fmt.Println("=== DMS Greeter Profile Sync ===")
+		fmt.Println()
+		fmt.Println("Syncing your personal greeter theme slot (no system changes)...")
+	}
+	if err := greeter.SyncUserProfileCache(logFunc); err != nil {
+		return err
+	}
+	if !nonInteractive {
+		fmt.Println("\n=== Profile Sync Complete ===")
+		fmt.Println("\nYour theme, wallpaper, and profile photo have been synced for the login screen.")
+		fmt.Println("Log out to preview your greeter look when selecting your account.")
+	}
+	return nil
+}
+
 func hasDmsShellQml(dir string) bool {
 	info, err := os.Stat(filepath.Join(dir, "shell.qml"))
 	return err == nil && !info.IsDir()
@@ -837,7 +872,14 @@ func resolveLocalDMSPath() (string, error) {
 		}
 	}
 
-	return "", fmt.Errorf("could not locate a local DMS checkout from %s; run from repo root or set DMS_LOCAL_PATH=/absolute/path/to/repo", wd)
+	configuredCommand := readDefaultSessionCommand("/etc/greetd/config.toml")
+	if pathOverride := extractGreeterPathOverrideFromCommand(configuredCommand); pathOverride != "" {
+		if resolved, ok := resolveDMSLocalCandidate(pathOverride); ok {
+			return resolved, nil
+		}
+	}
+
+	return "", fmt.Errorf("could not locate a local DMS checkout from %s; run from repo root, set DMS_LOCAL_PATH=/absolute/path/to/repo, or configure greetd with -p /path/to/quickshell", wd)
 }
 
 func disableDisplayManager(dmName string) (bool, error) {

core/internal/greeter/installer.go

@@ -9,6 +9,7 @@ import (
 	"fmt"
 	"os"
 	"os/exec"
+	"os/user"
 	"path/filepath"
 	"strings"
 	"time"
@@ -572,6 +573,7 @@ func EnsureGreeterCacheDir(logFunc func(string), sudoPassword string) error {
 	}
 
 	runtimeDirs := []string{
+		filepath.Join(cacheDir, "users"),
 		filepath.Join(cacheDir, ".local"),
 		filepath.Join(cacheDir, ".local", "state"),
 		filepath.Join(cacheDir, ".local", "share"),
@@ -1255,6 +1257,16 @@ func SyncDMSConfigs(dmsPath, compositor string, logFunc func(string), sudoPasswo
 		return fmt.Errorf("greeter wallpaper override sync failed: %w", err)
 	}
 
+	currentUser, err := user.Current()
+	if err != nil {
+		return fmt.Errorf("failed to resolve syncing user for per-user greeter cache: %w", err)
+	}
+	if err := syncUserGreeterCacheSlot(homeDir, cacheDir, currentUser.Username, state, logFunc, userSlotSyncOpts{
+		sudoPassword: sudoPassword,
+	}); err != nil {
+		return fmt.Errorf("per-user greeter cache sync failed: %w", err)
+	}
+
 	if strings.ToLower(compositor) != "niri" {
 		return nil
 	}

core/internal/greeter/user_cache_sync.go

@@ -0,0 +1,548 @@
+package greeter
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"os"
+	"os/exec"
+	"os/user"
+	"path/filepath"
+	"regexp"
+	"strings"
+
+	"github.com/AvengeMedia/DankMaterialShell/core/internal/privesc"
+	"github.com/AvengeMedia/DankMaterialShell/core/internal/utils"
+)
+
+var monitorWallpaperSanitizer = regexp.MustCompile(`[^a-zA-Z0-9]+`)
+
+func userGreeterCacheDir(cacheDir, username string) string {
+	return filepath.Join(cacheDir, "users", username)
+}
+
+func isUserOwnedGreeterCacheSlot(path, username string) bool {
+	if strings.TrimSpace(username) == "" {
+		return false
+	}
+	userDir, err := filepath.Abs(userGreeterCacheDir(GreeterCacheDir, username))
+	if err != nil {
+		return false
+	}
+	abs, err := filepath.Abs(path)
+	if err != nil {
+		return false
+	}
+	return abs == userDir || strings.HasPrefix(abs, userDir+string(filepath.Separator))
+}
+
+func UserIsInGreeterGroup(username string) bool {
+	group := DetectGreeterGroup()
+	if !utils.HasGroup(group) {
+		return false
+	}
+	groupsCmd := exec.Command("groups", username)
+	groupsOutput, err := groupsCmd.Output()
+	if err != nil {
+		return false
+	}
+	return strings.Contains(string(groupsOutput), group)
+}
+
+func CanSyncOwnUserGreeterProfile(username string) bool {
+	currentUser, err := user.Current()
+	if err != nil || currentUser.Username != username {
+		return false
+	}
+	if !UserIsInGreeterGroup(username) {
+		return false
+	}
+	usersDir := filepath.Join(GreeterCacheDir, "users")
+	if st, err := os.Stat(usersDir); err != nil || !st.IsDir() {
+		return false
+	}
+	testFile := filepath.Join(usersDir, ".write-test-"+username)
+	file, err := os.OpenFile(testFile, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0o660)
+	if err != nil {
+		return false
+	}
+	_ = file.Close()
+	_ = os.Remove(testFile)
+	return true
+}
+
+func GreeterProfileSyncReady() bool {
+	if command := readGreeterSessionCommand(); command != "" && strings.Contains(command, "dms-greeter") {
+		return true
+	}
+	usersDir := filepath.Join(GreeterCacheDir, "users")
+	st, err := os.Stat(usersDir)
+	return err == nil && st.IsDir()
+}
+
+func readGreeterSessionCommand() string {
+	data, err := os.ReadFile("/etc/greetd/config.toml")
+	if err != nil {
+		return ""
+	}
+	inDefaultSession := false
+	for line := range strings.SplitSeq(string(data), "\n") {
+		trimmed := strings.TrimSpace(line)
+		if strings.HasPrefix(trimmed, "[") && strings.HasSuffix(trimmed, "]") {
+			inDefaultSession = strings.EqualFold(strings.Trim(trimmed, "[]"), "default_session")
+			continue
+		}
+		if !inDefaultSession {
+			continue
+		}
+		if idx := strings.Index(trimmed, "#"); idx >= 0 {
+			trimmed = strings.TrimSpace(trimmed[:idx])
+		}
+		if !strings.HasPrefix(trimmed, "command") {
+			continue
+		}
+		parts := strings.SplitN(trimmed, "=", 2)
+		if len(parts) != 2 {
+			continue
+		}
+		command := strings.Trim(strings.TrimSpace(parts[1]), `"`)
+		if command != "" {
+			return command
+		}
+	}
+	return ""
+}
+
+// SyncUserProfileCache writes the current user's theme slot under users/<username>/
+// without modifying greetd or other system configuration. Requires membership in the
+// greeter group and a prior full greeter setup by an administrator.
+func SyncUserProfileCache(logFunc func(string)) error {
+	if logFunc == nil {
+		logFunc = func(string) {}
+	}
+	if !GreeterProfileSyncReady() {
+		return fmt.Errorf("greeter is not set up on this system yet; an administrator must run 'dms greeter install' or 'dms greeter sync' once first")
+	}
+
+	currentUser, err := user.Current()
+	if err != nil {
+		return fmt.Errorf("failed to resolve current user: %w", err)
+	}
+	if !CanSyncOwnUserGreeterProfile(currentUser.Username) {
+		group := DetectGreeterGroup()
+		return fmt.Errorf("cannot sync greeter profile: you must be in the %s group with write access to %s/users\nAsk an administrator to run:\n  sudo usermod -aG %s %s\nThen log out and back in before running:\n  dms greeter sync --profile",
+			group, GreeterCacheDir, group, currentUser.Username)
+	}
+
+	homeDir, err := os.UserHomeDir()
+	if err != nil {
+		return fmt.Errorf("failed to get user home directory: %w", err)
+	}
+
+	state, err := resolveGreeterThemeSyncState(homeDir)
+	if err != nil {
+		return fmt.Errorf("failed to resolve greeter color source: %w", err)
+	}
+
+	if err := syncUserGreeterCacheSlot(homeDir, GreeterCacheDir, currentUser.Username, state, logFunc, userSlotSyncOpts{
+		profileOnly: true,
+	}); err != nil {
+		return err
+	}
+
+	logFunc(fmt.Sprintf("  → %s/users/%s/", GreeterCacheDir, currentUser.Username))
+	return nil
+}
+
+func canWriteUserGreeterCacheSlot(dest, username string) bool {
+	return isUserOwnedGreeterCacheSlot(dest, username) && CanSyncOwnUserGreeterProfile(username)
+}
+
+type userSlotSyncOpts struct {
+	sudoPassword string
+	profileOnly  bool
+	username     string
+}
+
+func (o userSlotSyncOpts) useDirectWrite(dest string) bool {
+	if !o.profileOnly {
+		return false
+	}
+	return canWriteUserGreeterCacheSlot(dest, o.username)
+}
+
+func isGreeterCachePath(path string) bool {
+	abs, err := filepath.Abs(path)
+	if err != nil {
+		return true
+	}
+	cacheAbs, err := filepath.Abs(GreeterCacheDir)
+	if err != nil {
+		return true
+	}
+	if abs == cacheAbs {
+		return true
+	}
+	return strings.HasPrefix(abs, cacheAbs+string(filepath.Separator))
+}
+
+func greeterCacheOwner() string {
+	greeterGroup := DetectGreeterGroup()
+	daemonUser := DetectGreeterUser()
+	return daemonUser + ":" + greeterGroup
+}
+
+func ensureGreeterCacheSubdir(dir string, opts userSlotSyncOpts) error {
+	if opts.useDirectWrite(dir) {
+		if err := os.MkdirAll(dir, 0o770); err != nil {
+			return fmt.Errorf("failed to create cache directory %s: %w", dir, err)
+		}
+		return nil
+	}
+
+	if err := privesc.Run(context.Background(), opts.sudoPassword, "mkdir", "-p", dir); err != nil {
+		return fmt.Errorf("failed to create cache directory %s: %w", dir, err)
+	}
+
+	owner := greeterCacheOwner()
+	if err := privesc.Run(context.Background(), opts.sudoPassword, "chown", owner, dir); err != nil {
+		if fallbackErr := privesc.Run(context.Background(), opts.sudoPassword, "chown", "root:"+DetectGreeterGroup(), dir); fallbackErr != nil {
+			return fmt.Errorf("failed to set ownership on %s: %w", dir, err)
+		}
+	}
+	if err := privesc.Run(context.Background(), opts.sudoPassword, "chmod", "2770", dir); err != nil {
+		return fmt.Errorf("failed to set permissions on %s: %w", dir, err)
+	}
+	return nil
+}
+
+func setGreeterCacheFileOwnership(path, sudoPassword string) error {
+	owner := greeterCacheOwner()
+	if err := privesc.Run(context.Background(), sudoPassword, "chown", owner, path); err != nil {
+		if fallbackErr := privesc.Run(context.Background(), sudoPassword, "chown", "root:"+DetectGreeterGroup(), path); fallbackErr != nil {
+			return fmt.Errorf("failed to set ownership on %s: %w", path, err)
+		}
+	}
+	if err := privesc.Run(context.Background(), sudoPassword, "chmod", "644", path); err != nil {
+		return fmt.Errorf("failed to set permissions on %s: %w", path, err)
+	}
+	return nil
+}
+
+func syncUserGreeterCacheSlot(homeDir, cacheDir, username string, state greeterThemeSyncState, logFunc func(string), opts userSlotSyncOpts) error {
+	if strings.TrimSpace(username) == "" {
+		return nil
+	}
+	opts.username = username
+
+	userDir := userGreeterCacheDir(cacheDir, username)
+	if err := ensureGreeterCacheSubdir(userDir, opts); err != nil {
+		return err
+	}
+
+	settingsPath := filepath.Join(homeDir, ".config", "DankMaterialShell", "settings.json")
+	settingsBytes, err := os.ReadFile(settingsPath)
+	if err != nil {
+		return fmt.Errorf("failed to read settings for user cache slot: %w", err)
+	}
+
+	settingsMap := map[string]any{}
+	if strings.TrimSpace(string(settingsBytes)) != "" {
+		if err := json.Unmarshal(settingsBytes, &settingsMap); err != nil {
+			return fmt.Errorf("failed to parse settings for user cache slot: %w", err)
+		}
+	}
+
+	if customTheme, ok := settingsMap["customThemeFile"].(string); ok && strings.TrimSpace(customTheme) != "" {
+		resolvedTheme := customTheme
+		if !filepath.IsAbs(resolvedTheme) {
+			resolvedTheme = filepath.Join(homeDir, resolvedTheme)
+		}
+		if st, statErr := os.Stat(resolvedTheme); statErr == nil && !st.IsDir() {
+			destTheme := filepath.Join(userDir, "custom-theme.json")
+			if err := copyFileWithPrivesc(resolvedTheme, destTheme, opts); err != nil {
+				return err
+			}
+			settingsMap["customThemeFile"] = destTheme
+		}
+	}
+
+	settingsBytes, err = json.Marshal(settingsMap)
+	if err != nil {
+		return fmt.Errorf("failed to marshal settings for user cache slot: %w", err)
+	}
+	if err := writeFileWithPrivesc(filepath.Join(userDir, "settings.json"), settingsBytes, opts); err != nil {
+		return err
+	}
+
+	sessionPath := filepath.Join(homeDir, ".local", "state", "DankMaterialShell", "session.json")
+	sessionBytes, err := os.ReadFile(sessionPath)
+	if err != nil {
+		return fmt.Errorf("failed to read session for user cache slot: %w", err)
+	}
+
+	sessionMap := map[string]any{}
+	if strings.TrimSpace(string(sessionBytes)) != "" {
+		if err := json.Unmarshal(sessionBytes, &sessionMap); err != nil {
+			return fmt.Errorf("failed to parse session for user cache slot: %w", err)
+		}
+	}
+
+	if err := localizeSessionWallpapers(sessionMap, userDir, opts); err != nil {
+		return err
+	}
+
+	sessionBytes, err = json.Marshal(sessionMap)
+	if err != nil {
+		return fmt.Errorf("failed to marshal session for user cache slot: %w", err)
+	}
+	if err := writeFileWithPrivesc(filepath.Join(userDir, "session.json"), sessionBytes, opts); err != nil {
+		return err
+	}
+
+	colorsSource := state.effectiveColorsSource(homeDir)
+	if err := copyFileWithPrivesc(colorsSource, filepath.Join(userDir, "colors.json"), opts); err != nil {
+		return fmt.Errorf("failed to copy colors for user cache slot: %w", err)
+	}
+
+	if err := syncUserProfileImage(homeDir, userDir, opts); err != nil {
+		return err
+	}
+
+	rootOverride := filepath.Join(cacheDir, "greeter_wallpaper_override.jpg")
+	userOverride := filepath.Join(userDir, "greeter_wallpaper_override.jpg")
+	if st, statErr := os.Stat(rootOverride); statErr == nil && !st.IsDir() {
+		if err := copyFileWithPrivesc(rootOverride, userOverride, opts); err != nil {
+			return fmt.Errorf("failed to copy greeter wallpaper override for user cache slot: %w", err)
+		}
+	} else if opts.useDirectWrite(userOverride) {
+		_ = os.Remove(userOverride)
+	} else {
+		_ = privesc.Run(context.Background(), opts.sudoPassword, "rm", "-f", userOverride)
+	}
+
+	logFunc(fmt.Sprintf("✓ Synced per-user greeter cache for %s", username))
+	return nil
+}
+
+func localizeSessionWallpapers(session map[string]any, userDir string, opts userSlotSyncOpts) error {
+	stringKeys := []struct {
+		key    string
+		prefix string
+	}{
+		{"wallpaperPath", "wallpaper"},
+		{"wallpaperPathLight", "wallpaper-light"},
+		{"wallpaperPathDark", "wallpaper-dark"},
+	}
+	for _, item := range stringKeys {
+		if err := localizeWallpaperStringField(session, item.key, userDir, item.prefix, opts); err != nil {
+			return err
+		}
+	}
+
+	mapKeys := []struct {
+		key    string
+		prefix string
+	}{
+		{"monitorWallpapers", "wallpaper-monitor"},
+		{"monitorWallpapersLight", "wallpaper-monitor-light"},
+		{"monitorWallpapersDark", "wallpaper-monitor-dark"},
+	}
+	for _, item := range mapKeys {
+		if err := localizeWallpaperMapField(session, item.key, userDir, item.prefix, opts); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func localizeWallpaperStringField(session map[string]any, key, userDir, prefix string, opts userSlotSyncOpts) error {
+	raw, ok := session[key]
+	if !ok {
+		return nil
+	}
+	path, ok := raw.(string)
+	if !ok || strings.TrimSpace(path) == "" {
+		return nil
+	}
+	dest, err := copyWallpaperIntoUserCache(path, userDir, prefix, opts)
+	if err != nil {
+		return err
+	}
+	if dest != "" {
+		session[key] = dest
+	}
+	return nil
+}
+
+func localizeWallpaperMapField(session map[string]any, key, userDir, prefix string, opts userSlotSyncOpts) error {
+	raw, ok := session[key]
+	if !ok || raw == nil {
+		return nil
+	}
+	values, ok := raw.(map[string]any)
+	if !ok {
+		return nil
+	}
+	for monitor, rawPath := range values {
+		path, ok := rawPath.(string)
+		if !ok || strings.TrimSpace(path) == "" {
+			continue
+		}
+		safeMonitor := monitorWallpaperSanitizer.ReplaceAllString(monitor, "-")
+		dest, err := copyWallpaperIntoUserCache(path, userDir, prefix+"-"+safeMonitor, opts)
+		if err != nil {
+			return err
+		}
+		if dest != "" {
+			values[monitor] = dest
+		}
+	}
+	return nil
+}
+
+func copyWallpaperIntoUserCache(srcPath, userDir, prefix string, opts userSlotSyncOpts) (string, error) {
+	if strings.TrimSpace(srcPath) == "" {
+		return "", nil
+	}
+	st, err := os.Stat(srcPath)
+	if err != nil || st.IsDir() {
+		return "", nil
+	}
+	ext := filepath.Ext(srcPath)
+	if ext == "" {
+		ext = ".jpg"
+	}
+	dest := filepath.Join(userDir, prefix+ext)
+	if err := copyFileWithPrivesc(srcPath, dest, opts); err != nil {
+		return "", err
+	}
+	return dest, nil
+}
+
+func copyFileWithPrivesc(src, dest string, opts userSlotSyncOpts) error {
+	if opts.useDirectWrite(dest) {
+		if err := os.MkdirAll(filepath.Dir(dest), 0o770); err != nil {
+			return fmt.Errorf("failed to create parent dir for %s: %w", dest, err)
+		}
+		data, err := os.ReadFile(src)
+		if err != nil {
+			return fmt.Errorf("failed to read %s: %w", src, err)
+		}
+		if err := os.WriteFile(dest, data, 0o644); err != nil {
+			return fmt.Errorf("failed to write %s: %w", dest, err)
+		}
+		return nil
+	}
+
+	if !isGreeterCachePath(dest) {
+		if err := os.MkdirAll(filepath.Dir(dest), 0o755); err != nil {
+			return fmt.Errorf("failed to create parent dir for %s: %w", dest, err)
+		}
+		data, err := os.ReadFile(src)
+		if err != nil {
+			return fmt.Errorf("failed to read %s: %w", src, err)
+		}
+		if err := os.WriteFile(dest, data, 0o644); err != nil {
+			return fmt.Errorf("failed to write %s: %w", dest, err)
+		}
+		return nil
+	}
+
+	_ = privesc.Run(context.Background(), opts.sudoPassword, "rm", "-f", dest)
+	if err := privesc.Run(context.Background(), opts.sudoPassword, "cp", src, dest); err != nil {
+		return fmt.Errorf("failed to copy %s to %s: %w", src, dest, err)
+	}
+	return setGreeterCacheFileOwnership(dest, opts.sudoPassword)
+}
+
+func writeFileWithPrivesc(path string, data []byte, opts userSlotSyncOpts) error {
+	if opts.useDirectWrite(path) {
+		if err := os.MkdirAll(filepath.Dir(path), 0o770); err != nil {
+			return fmt.Errorf("failed to create parent dir for %s: %w", path, err)
+		}
+		if err := os.WriteFile(path, data, 0o644); err != nil {
+			return fmt.Errorf("failed to write %s: %w", path, err)
+		}
+		return nil
+	}
+
+	if !isGreeterCachePath(path) {
+		if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
+			return fmt.Errorf("failed to create parent dir for %s: %w", path, err)
+		}
+		if err := os.WriteFile(path, data, 0o644); err != nil {
+			return fmt.Errorf("failed to write %s: %w", path, err)
+		}
+		return nil
+	}
+
+	tmp, err := os.CreateTemp("", "dms-greeter-user-cache-*")
+	if err != nil {
+		return fmt.Errorf("failed to create temp file for %s: %w", path, err)
+	}
+	tmpPath := tmp.Name()
+	if _, err := tmp.Write(data); err != nil {
+		_ = tmp.Close()
+		_ = os.Remove(tmpPath)
+		return fmt.Errorf("failed to write temp file for %s: %w", path, err)
+	}
+	if err := tmp.Close(); err != nil {
+		_ = os.Remove(tmpPath)
+		return fmt.Errorf("failed to close temp file for %s: %w", path, err)
+	}
+	defer os.Remove(tmpPath)
+
+	_ = privesc.Run(context.Background(), opts.sudoPassword, "rm", "-f", path)
+	if err := privesc.Run(context.Background(), opts.sudoPassword, "cp", tmpPath, path); err != nil {
+		return fmt.Errorf("failed to install %s: %w", path, err)
+	}
+	return setGreeterCacheFileOwnership(path, opts.sudoPassword)
+}
+
+func resolveUserProfileImageSource(homeDir string) string {
+	candidates := []string{
+		filepath.Join(homeDir, ".face"),
+		filepath.Join(homeDir, ".face.icon"),
+	}
+	if homeDir != "" {
+		username := filepath.Base(homeDir)
+		if username != "" && username != "." && username != string(filepath.Separator) {
+			candidates = append([]string{filepath.Join("/var/lib/AccountsService/icons", username)}, candidates...)
+		}
+	}
+	for _, src := range candidates {
+		st, err := os.Stat(src)
+		if err == nil && !st.IsDir() && st.Size() > 0 {
+			return src
+		}
+	}
+	return ""
+}
+
+func syncUserProfileImage(homeDir, userDir string, opts userSlotSyncOpts) error {
+	for _, name := range []string{"profile.jpg", "profile.jpeg", "profile.png", "profile.webp"} {
+		path := filepath.Join(userDir, name)
+		if opts.useDirectWrite(path) {
+			_ = os.Remove(path)
+		} else {
+			_ = privesc.Run(context.Background(), opts.sudoPassword, "rm", "-f", path)
+		}
+	}
+
+	src := resolveUserProfileImageSource(homeDir)
+	if src == "" {
+		return nil
+	}
+
+	ext := filepath.Ext(src)
+	if ext == "" {
+		ext = ".jpg"
+	}
+	dest := filepath.Join(userDir, "profile"+ext)
+	if err := copyFileWithPrivesc(src, dest, opts); err != nil {
+		return fmt.Errorf("failed to copy profile image for user cache slot: %w", err)
+	}
+	return nil
+}

core/internal/greeter/user_cache_sync_test.go

@@ -0,0 +1,81 @@
+package greeter
+
+import (
+	"path/filepath"
+	"testing"
+)
+
+func TestUserGreeterCacheDir(t *testing.T) {
+	t.Parallel()
+
+	got := userGreeterCacheDir("/var/cache/dms-greeter", "alice")
+	want := filepath.Join("/var/cache/dms-greeter", "users", "alice")
+	if got != want {
+		t.Fatalf("userGreeterCacheDir() = %q, want %q", got, want)
+	}
+}
+
+func TestResolveUserProfileImageSource(t *testing.T) {
+	t.Parallel()
+
+	homeDir := t.TempDir()
+	facePath := filepath.Join(homeDir, ".face")
+	writeTestFile(t, facePath, "face")
+
+	got := resolveUserProfileImageSource(homeDir)
+	if got != facePath {
+		t.Fatalf("resolveUserProfileImageSource() = %q, want %q", got, facePath)
+	}
+}
+
+func TestIsUserOwnedGreeterCacheSlot(t *testing.T) {
+	t.Parallel()
+
+	slot := filepath.Join(GreeterCacheDir, "users", "alice", "settings.json")
+	if !isUserOwnedGreeterCacheSlot(slot, "alice") {
+		t.Fatalf("expected alice to own %q", slot)
+	}
+	if isUserOwnedGreeterCacheSlot(slot, "bob") {
+		t.Fatalf("expected bob not to own alice slot")
+	}
+	if isUserOwnedGreeterCacheSlot(filepath.Join(GreeterCacheDir, "settings.json"), "alice") {
+		t.Fatalf("expected root cache file not to be a user slot")
+	}
+}
+
+func TestLocalizeSessionWallpapers(t *testing.T) {
+	t.Parallel()
+
+	homeDir := t.TempDir()
+	userDir := filepath.Join(homeDir, "users", "alice")
+	wallpaperPath := filepath.Join(homeDir, "wall.jpg")
+	writeTestFile(t, wallpaperPath, "wallpaper")
+
+	session := map[string]any{
+		"wallpaperPath": wallpaperPath,
+		"monitorWallpapers": map[string]any{
+			"DP-1": wallpaperPath,
+		},
+	}
+
+	if err := localizeSessionWallpapers(session, userDir, userSlotSyncOpts{}); err != nil {
+		t.Fatalf("localizeSessionWallpapers returned error: %v", err)
+	}
+
+	gotPath, ok := session["wallpaperPath"].(string)
+	if !ok || gotPath == "" {
+		t.Fatalf("expected localized wallpaperPath, got %#v", session["wallpaperPath"])
+	}
+	if gotPath == wallpaperPath {
+		t.Fatalf("expected copied wallpaper path, still points to source")
+	}
+
+	monitorMap, ok := session["monitorWallpapers"].(map[string]any)
+	if !ok {
+		t.Fatalf("expected monitorWallpapers map")
+	}
+	monitorPath, ok := monitorMap["DP-1"].(string)
+	if !ok || monitorPath == "" || monitorPath == wallpaperPath {
+		t.Fatalf("expected localized monitor wallpaper, got %#v", monitorMap["DP-1"])
+	}
+}

quickshell/Common/SessionData.qml

@@ -1353,13 +1353,27 @@ Singleton {
         }
     }
 
+    readonly property string _greeterCacheDir: Quickshell.env("DMS_GREET_CFG_DIR") || "/var/cache/dms-greeter"
+
+    property string greeterSessionBaseDir: root._greeterCacheDir
+
+    function setGreeterSessionBaseDir(dir) {
+        const next = dir || root._greeterCacheDir;
+        if (greeterSessionBaseDir === next)
+            return;
+        greeterSessionBaseDir = next;
+        if (isGreeterMode)
+            greeterSessionFile.reload();
+    }
+
+    function resetGreeterSessionBaseDir() {
+        setGreeterSessionBaseDir(root._greeterCacheDir);
+    }
+
     FileView {
         id: greeterSessionFile
 
-        path: {
-            const greetCfgDir = Quickshell.env("DMS_GREET_CFG_DIR") || "/var/cache/dms-greeter";
-            return greetCfgDir + "/session.json";
-        }
+        path: root.greeterSessionBaseDir ? (root.greeterSessionBaseDir + "/session.json") : ""
         preload: isGreeterMode
         blockLoading: false
         blockWrites: true

quickshell/Common/Theme.qml

@@ -2079,12 +2079,29 @@ Singleton {
         }
     }
 
+    readonly property string _greeterCacheDir: Quickshell.env("DMS_GREET_CFG_DIR") || "/var/cache/dms-greeter"
+
+    property string greeterColorsBaseDir: root._greeterCacheDir
+
+    function setGreeterColorsBaseDir(dir) {
+        const next = dir || root._greeterCacheDir;
+        if (greeterColorsBaseDir === next)
+            return;
+        greeterColorsBaseDir = next;
+        if (typeof SessionData !== "undefined" && SessionData.isGreeterMode)
+            dynamicColorsFileView.reload();
+    }
+
+    function resetGreeterColorsBaseDir() {
+        setGreeterColorsBaseDir(root._greeterCacheDir);
+    }
+
     FileView {
         id: dynamicColorsFileView
         path: {
-            const greetCfgDir = Quickshell.env("DMS_GREET_CFG_DIR") || "/var/cache/dms-greeter";
-            const colorsPath = SessionData.isGreeterMode ? greetCfgDir + "/colors.json" : stateDir + "/dms-colors.json";
-            return colorsPath;
+            if (SessionData.isGreeterMode)
+                return root.greeterColorsBaseDir ? (root.greeterColorsBaseDir + "/colors.json") : "";
+            return stateDir + "/dms-colors.json";
         }
         blockLoading: false
         watchChanges: !SessionData.isGreeterMode

quickshell/Modules/Greetd/GreetdSettings.qml

@@ -12,16 +12,24 @@ Singleton {
     id: root
     readonly property var log: Log.scoped("GreetdSettings")
 
-    readonly property string configPath: {
-        const greetCfgDir = Quickshell.env("DMS_GREET_CFG_DIR") || "/var/cache/dms-greeter";
-        return greetCfgDir + "/settings.json";
+    readonly property string _greeterCacheDir: Quickshell.env("DMS_GREET_CFG_DIR") || "/var/cache/dms-greeter"
+
+    property string configBaseDir: root._greeterCacheDir
+    readonly property string configPath: root.configBaseDir ? (root.configBaseDir + "/settings.json") : ""
+    readonly property string greeterWallpaperOverridePath: root.configBaseDir ? (root.configBaseDir + "/greeter_wallpaper_override.jpg") : ""
+
+    function setConfigBaseDir(dir) {
+        const next = dir || root._greeterCacheDir;
+        if (configBaseDir === next)
+            return;
+        configBaseDir = next;
+        settingsLoaded = false;
+        settingsFile.reload();
     }
 
-    readonly property string _greeterCacheDir: {
-        const i = root.configPath.lastIndexOf("/");
-        return i >= 0 ? root.configPath.substring(0, i) : "";
+    function resetConfigBaseDir() {
+        setConfigBaseDir(root._greeterCacheDir);
     }
-    readonly property string greeterWallpaperOverridePath: root._greeterCacheDir ? (root._greeterCacheDir + "/greeter_wallpaper_override.jpg") : ""
 
     property string currentThemeName: "purple"
     property bool settingsLoaded: false

quickshell/Modules/Greetd/GreeterContent.qml

@@ -62,6 +62,11 @@ Item {
     readonly property bool greeterPamHasU2f: greeterPamStackHasModule("pam_u2f")
     readonly property bool greeterExternalAuthAvailable: (greeterPamHasFprint && GreetdSettings.greeterEnableFprint) || (greeterPamHasU2f && GreetdSettings.greeterEnableU2f)
     readonly property bool greeterPamHasExternalAuth: greeterPamHasFprint || greeterPamHasU2f
+    readonly property bool multipleUsersAvailable: GreeterUsersService.loaded && GreeterUsersService.users.length > 1
+    readonly property bool showUserPicker: multipleUsersAvailable && !GreeterState.showPasswordInput
+    property bool userListOpen: false
+    property bool skipAutoSelectUser: false
+    property string pickerThemeUsername: ""
 
     function initWeatherService() {
         if (weatherInitialized)
@@ -428,20 +433,61 @@ Item {
         fprintdDeviceProbe.running = true;
     }
 
+    function applyPickerPreviewTheme() {
+        let previewUser = (pickerThemeUsername || "").trim();
+        if (!previewUser && GreetdSettings.rememberLastUser)
+            previewUser = (GreetdMemory.lastSuccessfulUser || "").trim();
+        if (previewUser)
+            GreeterUserTheme.applyForUser(previewUser);
+        else
+            GreeterUserTheme.applyDefault();
+    }
+
     function applyLastSuccessfulUser() {
+        if (root.skipAutoSelectUser)
+            return;
         if (!GreetdSettings.settingsLoaded || !GreetdSettings.rememberLastUser)
             return;
         const lastUser = GreetdMemory.lastSuccessfulUser;
         if (lastUser && !GreeterState.showPasswordInput && !GreeterState.username) {
-            GreeterState.username = lastUser;
-            GreeterState.usernameInput = lastUser;
-            GreeterState.showPasswordInput = true;
-            PortalService.getGreeterUserProfileImage(lastUser);
-            maybeAutoStartExternalAuth();
+            selectUser(lastUser, true);
         }
     }
 
-    function submitUsername(rawValue) {
+    function returnToUserPicker() {
+        if (!root.multipleUsersAvailable || GreeterState.unlocking)
+            return;
+        root.skipAutoSelectUser = true;
+        awaitingExternalAuth = false;
+        pendingPasswordResponse = false;
+        passwordSubmitRequested = false;
+        resetPasswordSessionTransition(true);
+        authTimeout.interval = defaultAuthTimeoutMs;
+        authTimeout.stop();
+        clearAuthFeedback();
+        passwordFailureCount = 0;
+        externalAuthAutoStartedForUser = "";
+        if (Greetd.state !== GreetdState.Inactive)
+            Greetd.cancelSession();
+        const previousUser = GreeterState.username;
+        GreeterState.reset();
+        inputField.text = "";
+        PortalService.profileImage = "";
+        if (previousUser)
+            root.pickerThemeUsername = previousUser;
+        root.applyPickerPreviewTheme();
+        root.userListOpen = true;
+    }
+
+    function selectUser(rawValue, skipDropdownUpdate) {
+        const user = (rawValue || "").trim();
+        if (!user)
+            return;
+        root.skipAutoSelectUser = false;
+        submitUsername(user, skipDropdownUpdate === true);
+    }
+
+    function submitUsername(rawValue, skipDropdownUpdate) {
         const user = (rawValue || "").trim();
         if (!user)
             return;
@@ -450,8 +496,15 @@ Item {
             clearAuthFeedback();
             externalAuthAutoStartedForUser = "";
         }
+        root.pickerThemeUsername = user;
         GreeterState.username = user;
+        GreeterState.usernameInput = user;
         GreeterState.showPasswordInput = true;
+        if (!skipDropdownUpdate && typeof GreeterUsersService !== "undefined") {
+            const idx = GreeterUsersService.usernames.indexOf(user);
+            GreeterState.selectedUserIndex = idx;
+        }
+        root.userListOpen = false;
         PortalService.getGreeterUserProfileImage(user);
         GreeterState.passwordBuffer = "";
         pendingPasswordResponse = false;
@@ -637,13 +690,44 @@ Item {
         }
     }
 
+    Connections {
+        target: GreeterUsersService
+        function onLoadedChanged() {
+            if (GreeterUsersService.loaded && isPrimaryScreen)
+                applyPickerPreviewTheme();
+        }
+        function onSyncedThemePathsChanged() {
+            if (!isPrimaryScreen)
+                return;
+            if (GreeterState.username)
+                GreeterUserTheme.applyForUser(GreeterState.username);
+            else if (root.showUserPicker || root.userListOpen)
+                applyPickerPreviewTheme();
+        }
+    }
+
     Connections {
         target: GreeterState
         function onUsernameChanged() {
             if (GreeterState.username) {
+                root.pickerThemeUsername = GreeterState.username;
+                GreeterUserTheme.applyForUser(GreeterState.username);
                 PortalService.getGreeterUserProfileImage(GreeterState.username);
+            } else if (root.showUserPicker || root.userListOpen) {
+                applyPickerPreviewTheme();
             }
         }
+        function onShowPasswordInputChanged() {
+            if (GreeterState.showPasswordInput)
+                root.userListOpen = false;
+        }
+    }
+
+    onShowUserPickerChanged: {
+        if (showUserPicker && !GreeterState.username)
+            applyPickerPreviewTheme();
+        if (!showUserPicker)
+            userListOpen = false;
     }
 
     FileView {
@@ -736,19 +820,26 @@ Item {
         anchors.fill: parent
         color: "transparent"
 
-        Item {
-            id: clockContainer
-            anchors.horizontalCenter: parent.horizontalCenter
-            anchors.bottom: parent.verticalCenter
-            anchors.bottomMargin: 60
-            width: parent.width
-            height: clockText.implicitHeight
+        Column {
+            id: greeterMainColumn
 
-            Row {
-                id: clockText
-                anchors.horizontalCenter: parent.horizontalCenter
-                anchors.top: parent.top
-                spacing: 0
+            anchors.horizontalCenter: parent.horizontalCenter
+            anchors.verticalCenter: parent.verticalCenter
+            spacing: Theme.spacingM
+            width: 380
+
+            Item {
+                id: clockContainer
+
+                width: parent.width
+                height: clockText.implicitHeight
+
+                Row {
+                    id: clockText
+
+                    anchors.horizontalCenter: parent.horizontalCenter
+                    anchors.top: parent.top
+                    spacing: 0
 
                 property string fullTimeStr: {
                     const format = GreetdSettings.getEffectiveTimeFormat();
@@ -853,60 +944,118 @@ Item {
                     visible: clockText.ampm !== ""
                 }
             }
-        }
-
-        StyledText {
-            id: dateText
-            anchors.horizontalCenter: parent.horizontalCenter
-            anchors.top: clockContainer.bottom
-            anchors.topMargin: 4
-            text: {
-                return systemClock.date.toLocaleDateString(I18n.locale(), GreetdSettings.getEffectiveLockDateFormat());
             }
-            font.pixelSize: Theme.fontSizeXLarge
-            color: "white"
-            opacity: 0.9
-        }
 
-        Item {
-            anchors.horizontalCenter: parent.horizontalCenter
-            anchors.top: dateText.bottom
-            anchors.topMargin: Theme.spacingL
-            width: 380
-            height: 140
+            StyledText {
+                id: dateText
+
+                anchors.horizontalCenter: parent.horizontalCenter
+                text: systemClock.date.toLocaleDateString(I18n.locale(), GreetdSettings.getEffectiveLockDateFormat())
+                font.pixelSize: Theme.fontSizeXLarge
+                color: "white"
+                opacity: 0.9
+            }
+
+            StyledText {
+                id: userPickerHint
+
+                anchors.horizontalCenter: parent.horizontalCenter
+                visible: root.showUserPicker && !GreeterState.showPasswordInput && !GreeterState.username && !root.userListOpen
+                text: I18n.tr("Select user...", "greeter user picker placeholder")
+                font.pixelSize: Theme.fontSizeMedium
+                color: "white"
+                opacity: 0.85
+            }
 
             ColumnLayout {
-                anchors.fill: parent
+                id: authColumn
+
+                width: parent.width
                 spacing: Theme.spacingM
 
                 RowLayout {
                     spacing: Theme.spacingL
                     Layout.fillWidth: true
 
-                    DankCircularImage {
+                    Item {
                         Layout.preferredWidth: 60
                         Layout.preferredHeight: 60
-                        imageSource: {
-                            if (PortalService.profileImage === "")
-                                return "";
-                            if (PortalService.profileImage.startsWith("/"))
-                                return encodeFileUrl(PortalService.profileImage);
-                            return PortalService.profileImage;
+                        visible: GreetdSettings.lockScreenShowProfileImage || root.multipleUsersAvailable
+
+                        DankCircularImage {
+                            anchors.fill: parent
+                            imageSource: {
+                                const displayUser = GreeterState.username || root.pickerThemeUsername;
+                                if (displayUser) {
+                                    const cachedPath = GreeterUsersService.profileImagePath(displayUser);
+                                    if (cachedPath)
+                                        return encodeFileUrl(cachedPath);
+                                }
+                                if (PortalService.profileImage === "")
+                                    return "";
+                                if (PortalService.profileImage.startsWith("/"))
+                                    return encodeFileUrl(PortalService.profileImage);
+                                return PortalService.profileImage;
+                            }
+                            fallbackIcon: "person"
+                        }
+
+                        Rectangle {
+                            anchors.fill: parent
+                            radius: width / 2
+                            color: "transparent"
+                            border.color: Theme.primary
+                            border.width: avatarPickerArea.containsMouse || root.userListOpen ? 2 : 0
+                            visible: root.multipleUsersAvailable
+                            Behavior on border.width {
+                                NumberAnimation {
+                                    duration: Theme.shortDuration
+                                    easing.type: Theme.standardEasing
+                                }
+                            }
+                        }
+
+                        MouseArea {
+                            id: avatarPickerArea
+
+                            anchors.fill: parent
+                            visible: root.multipleUsersAvailable
+                            hoverEnabled: true
+                            cursorShape: Qt.PointingHandCursor
+                            onClicked: {
+                                if (GreeterState.showPasswordInput)
+                                    root.returnToUserPicker();
+                                else
+                                    root.userListOpen = !root.userListOpen;
+                            }
                         }
-                        fallbackIcon: "person"
-                        visible: GreetdSettings.lockScreenShowProfileImage
                     }
 
                     Rectangle {
                         property bool showPassword: false
 
                         Layout.fillWidth: true
-                        Layout.preferredHeight: 60
+                        Layout.preferredHeight: root.showUserPicker && root.userListOpen ? Math.max(60, userPicker.implicitHeight + Theme.spacingM * 2) : 60
+
                         radius: Theme.cornerRadius
                         color: Qt.rgba(Theme.surfaceContainer.r, Theme.surfaceContainer.g, Theme.surfaceContainer.b, 0.9)
                         border.color: inputField.activeFocus ? Theme.primary : Qt.rgba(1, 1, 1, 0.3)
                         border.width: inputField.activeFocus ? 2 : 1
 
+                        GreeterUserPicker {
+                            id: userPicker
+
+                            anchors.left: parent.left
+                            anchors.right: parent.right
+                            anchors.verticalCenter: root.userListOpen ? undefined : parent.verticalCenter
+                            anchors.top: root.userListOpen ? parent.top : undefined
+                            anchors.margins: Theme.spacingM
+                            visible: root.showUserPicker && !GreeterState.showPasswordInput
+                            expanded: root.userListOpen
+                            onUserSelected: username => root.selectUser(username, false)
+                            onToggleRequested: root.userListOpen = !root.userListOpen
+                        }
+
                         DankIcon {
                             id: lockIcon
 
@@ -916,6 +1065,7 @@ Item {
                             name: GreeterState.showPasswordInput ? "lock" : "person"
                             size: 20
                             color: inputField.activeFocus ? Theme.primary : Theme.surfaceVariantText
+                            visible: !root.showUserPicker
                         }
 
                         TextInput {
@@ -941,8 +1091,9 @@ Item {
                                 }
                                 return margin;
                             }
+                            enabled: !root.showUserPicker || GreeterState.showPasswordInput
                             opacity: 0
-                            focus: true
+                            focus: !root.showUserPicker || GreeterState.showPasswordInput
                             echoMode: GreeterState.showPasswordInput ? (parent.showPassword ? TextInput.Normal : TextInput.Password) : TextInput.Normal
                             onTextChanged: {
                                 if (syncingFromState)
@@ -1005,11 +1156,14 @@ Item {
                                 if (GreeterState.showPasswordInput) {
                                     return I18n.tr("Password...");
                                 }
+                                if (root.showUserPicker) {
+                                    return "";
+                                }
                                 return I18n.tr("Username...");
                             }
                             color: (GreeterState.unlocking || (Greetd.state !== GreetdState.Inactive && !awaitingExternalAuth && !pendingPasswordResponse)) ? Theme.primary : Theme.outline
                             font.pixelSize: Theme.fontSizeMedium
-                            opacity: (GreeterState.showPasswordInput ? GreeterState.passwordBuffer.length === 0 : GreeterState.usernameInput.length === 0) ? 1 : 0
+                            opacity: (GreeterState.showPasswordInput ? GreeterState.passwordBuffer.length === 0 : (root.showUserPicker ? false : GreeterState.usernameInput.length === 0)) ? 1 : 0
 
                             Behavior on opacity {
                                 NumberAnimation {
@@ -1043,7 +1197,7 @@ Item {
                             }
                             color: Theme.surfaceText
                             font.pixelSize: (GreeterState.showPasswordInput && !parent.showPassword) ? Theme.fontSizeLarge : Theme.fontSizeMedium
-                            opacity: (GreeterState.showPasswordInput ? GreeterState.passwordBuffer.length > 0 : GreeterState.usernameInput.length > 0) ? 1 : 0
+                            opacity: (GreeterState.showPasswordInput ? GreeterState.passwordBuffer.length > 0 : (root.showUserPicker ? false : GreeterState.usernameInput.length > 0)) ? 1 : 0
                             clip: true
                             elide: Text.ElideNone
                             horizontalAlignment: implicitWidth > width ? Text.AlignRight : Text.AlignLeft
@@ -1088,7 +1242,7 @@ Item {
                             anchors.verticalCenter: parent.verticalCenter
                             iconName: "keyboard"
                             buttonSize: 32
-                            visible: (Greetd.state === GreetdState.Inactive || awaitingExternalAuth || pendingPasswordResponse) && !GreeterState.unlocking
+                            visible: (Greetd.state === GreetdState.Inactive || awaitingExternalAuth || pendingPasswordResponse) && !GreeterState.unlocking && (!root.showUserPicker || GreeterState.showPasswordInput)
                             enabled: visible
                             onClicked: {
                                 if (keyboard_controller.isKeyboardActive) {
@@ -1107,7 +1261,7 @@ Item {
                             anchors.verticalCenter: parent.verticalCenter
                             iconName: "keyboard_return"
                             buttonSize: 36
-                            visible: (Greetd.state === GreetdState.Inactive || awaitingExternalAuth || pendingPasswordResponse) && !GreeterState.unlocking
+                            visible: (Greetd.state === GreetdState.Inactive || awaitingExternalAuth || pendingPasswordResponse) && !GreeterState.unlocking && (!root.showUserPicker || GreeterState.showPasswordInput)
                             enabled: true
                             onClicked: {
                                 if (GreeterState.showPasswordInput) {
@@ -1198,13 +1352,8 @@ Item {
                     StateLayer {
                         stateColor: Theme.primary
                         cornerRadius: parent.radius
-                        enabled: !GreeterState.unlocking && Greetd.state === GreetdState.Inactive && GreeterState.showPasswordInput
-                        onClicked: {
-                            GreeterState.reset();
-                            root.externalAuthAutoStartedForUser = "";
-                            inputField.text = "";
-                            PortalService.profileImage = "";
-                        }
+                        enabled: !GreeterState.unlocking && GreeterState.showPasswordInput
+                        onClicked: root.returnToUserPicker()
                     }
                 }
             }

quickshell/Modules/Greetd/GreeterState.qml

@@ -19,6 +19,8 @@ Singleton {
     property var sessionExecs: []
     property var sessionPaths: []
     property int currentSessionIndex: 0
+    property var availableUsers: []
+    property int selectedUserIndex: -1
 
     function reset() {
         showPasswordInput = false;
@@ -26,5 +28,6 @@ Singleton {
         usernameInput = "";
         passwordBuffer = "";
         pamState = "";
+        selectedUserIndex = -1;
     }
 }

quickshell/Modules/Greetd/GreeterUserPicker.qml

@@ -0,0 +1,141 @@
+import QtQuick
+import QtQuick.Layouts
+import qs.Common
+import qs.Services
+import qs.Widgets
+
+Item {
+    id: root
+
+    property bool expanded: false
+
+    signal userSelected(string username)
+    signal toggleRequested()
+
+    function encodeFileUrl(path) {
+        if (!path)
+            return "";
+        return "file://" + path.split("/").map(s => encodeURIComponent(s)).join("/");
+    }
+
+    function profileImageSource(username) {
+        const path = GreeterUsersService.profileImagePath(username);
+        if (path)
+            return encodeFileUrl(path);
+        return "";
+    }
+
+    implicitHeight: column.implicitHeight
+    implicitWidth: parent ? parent.width : 320
+
+    ColumnLayout {
+        id: column
+
+        anchors.left: parent.left
+        anchors.right: parent.right
+        spacing: Theme.spacingS
+
+        RowLayout {
+            Layout.fillWidth: true
+            spacing: Theme.spacingM
+            visible: !root.expanded && !!GreeterState.username
+
+            StyledText {
+                Layout.fillWidth: true
+                text: GreeterUsersService.optionLabel(GreeterState.username)
+                color: Theme.surfaceText
+                font.pixelSize: Theme.fontSizeMedium
+                elide: Text.ElideRight
+            }
+
+            DankIcon {
+                name: "expand_more"
+                size: 20
+                color: Theme.surfaceVariantText
+            }
+
+            MouseArea {
+                anchors.fill: parent
+                cursorShape: Qt.PointingHandCursor
+                onClicked: root.toggleRequested()
+            }
+        }
+
+        Item {
+            Layout.fillWidth: true
+            Layout.preferredHeight: 36
+            visible: !root.expanded && !GreeterState.username
+
+            DankIcon {
+                anchors.centerIn: parent
+                name: "expand_more"
+                size: 20
+                color: Theme.surfaceVariantText
+            }
+
+            MouseArea {
+                anchors.fill: parent
+                cursorShape: Qt.PointingHandCursor
+                onClicked: root.toggleRequested()
+            }
+        }
+
+        ColumnLayout {
+            Layout.fillWidth: true
+            spacing: Theme.spacingXS
+            visible: root.expanded
+
+            Repeater {
+                model: GreeterUsersService.users
+
+                delegate: Rectangle {
+                    id: userRow
+
+                    required property var modelData
+
+                    Layout.fillWidth: true
+                    Layout.preferredHeight: 52
+                    radius: Theme.cornerRadius
+                    color: userRowMouse.containsMouse ? Theme.surfacePressed : "transparent"
+                    border.color: GreeterState.username === userRow.modelData.username ? Theme.primary : "transparent"
+                    border.width: GreeterState.username === userRow.modelData.username ? 1 : 0
+
+                    RowLayout {
+                        anchors.fill: parent
+                        anchors.leftMargin: Theme.spacingS
+                        anchors.rightMargin: Theme.spacingS
+                        spacing: Theme.spacingM
+
+                        Item {
+                            Layout.preferredWidth: 36
+                            Layout.preferredHeight: 36
+
+                            DankCircularImage {
+                                anchors.fill: parent
+                                imageSource: root.profileImageSource(userRow.modelData.username)
+                                fallbackIcon: "person"
+                            }
+                        }
+
+                        StyledText {
+                            Layout.fillWidth: true
+                            text: GreeterUsersService.optionLabel(userRow.modelData.username)
+                            color: Theme.surfaceText
+                            font.pixelSize: Theme.fontSizeMedium
+                            elide: Text.ElideRight
+                        }
+                    }
+
+                    MouseArea {
+                        id: userRowMouse
+
+                        anchors.fill: parent
+                        hoverEnabled: true
+                        cursorShape: Qt.PointingHandCursor
+                        onClicked: root.userSelected(userRow.modelData.username)
+                    }
+                }
+            }
+        }
+    }
+}

quickshell/Modules/Greetd/GreeterUserTheme.qml

@@ -0,0 +1,51 @@
+pragma Singleton
+pragma ComponentBehavior: Bound
+
+import QtQuick
+import Quickshell
+import qs.Common
+import qs.Services
+
+Singleton {
+    id: root
+
+    readonly property var log: Log.scoped("GreeterUserTheme")
+    readonly property string greetCfgDir: Quickshell.env("DMS_GREET_CFG_DIR") || "/var/cache/dms-greeter"
+
+    property string activeUsername: ""
+
+    function userCacheDir(username) {
+        if (!username)
+            return "";
+        return greetCfgDir + "/users/" + username;
+    }
+
+    function applyForUser(username) {
+        const name = (username || "").trim();
+        activeUsername = name;
+        if (!name) {
+            applyDefault();
+            return;
+        }
+        const dir = userCacheDir(name);
+        if (typeof GreeterUsersService !== "undefined" && GreeterUsersService.hasSyncedTheme(name)) {
+            Theme.setGreeterColorsBaseDir(dir);
+            SessionData.setGreeterSessionBaseDir(dir);
+            GreetdSettings.setConfigBaseDir(dir);
+            return;
+        }
+        applyDefault();
+    }
+
+    function applyDefault() {
+        activeUsername = "";
+        Theme.resetGreeterColorsBaseDir();
+        SessionData.resetGreeterSessionBaseDir();
+        GreetdSettings.resetConfigBaseDir();
+    }
+
+    readonly property string activeWallpaperOverridePath: {
+        const base = activeUsername && typeof GreeterUsersService !== "undefined" && GreeterUsersService.hasSyncedTheme(activeUsername) ? userCacheDir(activeUsername) : greetCfgDir;
+        return base ? base + "/greeter_wallpaper_override.jpg" : "";
+    }
+}

quickshell/Modules/Greetd/README.md

@@ -250,7 +250,17 @@ Only niri currently has a generated greeter config path managed by `dms greeter
 
 The greeter can be personalized with wallpapers, themes, weather, clock formats, and more - configured exactly the same as dms.
 
-**Easiest method:** Run `dms greeter sync` to automatically sync your DMS theme with the greeter.
+**Easiest method (single user):** Run `dms greeter sync` to automatically sync your DMS theme with the greeter.
+
+**Multi-user systems:** One **main admin** runs full sync once to set up greetd and the shared cache (`dms greeter sync`, or `dms greeter sync --local` when developing from a checkout). **Every other account**—including other admins—should only run:
+
+```bash
+dms greeter sync --profile
+```
+
+Before that, an administrator must add each user to the `greeter` group in **Settings → Users** (greeter toggle) or with `sudo usermod -aG greeter <username>`. Each added user must log out and back in before `--profile` will work.
+
+Per-user settings are stored under `/var/cache/dms-greeter/users/<username>/` for the login picker; the root cache remains the default fallback and is owned by whoever ran full sync.
 
 **Manual method:** You can manually synchronize configurations if you want greeter settings to always mirror your shell:
 

quickshell/Modules/Settings/GreeterTab.qml

@@ -446,7 +446,7 @@ Item {
                 settingKey: "greeterStatus"
 
                 StyledText {
-                    text: I18n.tr("Check sync status on demand. Sync copies your theme, settings, and wallpaper configuration to the login screen. Authentication changes apply automatically.")
+                    text: I18n.tr("Check sync status on demand. Sync (full) is for the main admin: it copies your theme to the login screen and sets up system greeter config. On multi-user systems, add other accounts in Settings → Users, then have each of them run dms greeter sync --profile after logging out and back in—not full sync. Authentication changes apply automatically.")
                     font.pixelSize: Theme.fontSizeSmall
                     color: Theme.surfaceVariantText
                     width: parent.width

quickshell/Modules/Settings/UsersTab.qml

@@ -17,12 +17,14 @@ Item {
     property string pendingPassword: ""
     property string pendingConfirm: ""
     property bool pendingAdmin: false
+    property bool pendingGreeter: false
 
     function _resetForm() {
         pendingUsername = "";
         pendingPassword = "";
         pendingConfirm = "";
         pendingAdmin = false;
+        pendingGreeter = false;
         usernameField.text = "";
         passwordField.text = "";
         confirmField.text = "";
@@ -59,6 +61,10 @@ Item {
         id: adminToggleConfirm
     }
 
+    ConfirmModal {
+        id: greeterToggleConfirm
+    }
+
     DankFlickable {
         anchors.fill: parent
         clip: true
@@ -112,6 +118,26 @@ Item {
                         height: 1
                     }
 
+                    StyledText {
+                        text: I18n.tr("Greeter group:")
+                        font.pixelSize: Theme.fontSizeSmall
+                        color: Theme.surfaceVariantText
+                        anchors.verticalCenter: parent.verticalCenter
+                    }
+
+                    StyledText {
+                        text: UsersService.greeterGroup
+                        font.pixelSize: Theme.fontSizeSmall
+                        font.weight: Font.Medium
+                        color: Theme.surfaceText
+                        anchors.verticalCenter: parent.verticalCenter
+                    }
+
+                    Item {
+                        width: Theme.spacingM
+                        height: 1
+                    }
+
                     StyledText {
                         text: UsersService.refreshing ? I18n.tr("Refreshing…") : ""
                         font.pixelSize: Theme.fontSizeSmall
@@ -120,6 +146,14 @@ Item {
                     }
                 }
 
+                StyledText {
+                    width: parent.width
+                    text: I18n.tr("Greeter group members can sync their login-screen theme with dms greeter sync --profile after logging out and back in.")
+                    font.pixelSize: Theme.fontSizeSmall
+                    color: Theme.surfaceVariantText
+                    wrapMode: Text.Wrap
+                }
+
                 Repeater {
                     model: UsersService.users
 
@@ -179,6 +213,24 @@ Item {
                                             font.weight: Font.Medium
                                         }
                                     }
+
+                                    Rectangle {
+                                        visible: userRow.modelData.isGreeter
+                                        width: greeterChipText.implicitWidth + Theme.spacingS * 2
+                                        height: greeterChipText.implicitHeight + Theme.spacingXS * 2
+                                        radius: Theme.cornerRadius
+                                        color: Theme.withAlpha(Theme.secondary, 0.15)
+                                        anchors.verticalCenter: parent.verticalCenter
+
+                                        StyledText {
+                                            id: greeterChipText
+                                            anchors.centerIn: parent
+                                            text: I18n.tr("greeter")
+                                            font.pixelSize: Theme.fontSizeSmall
+                                            color: Theme.secondary
+                                            font.weight: Font.Medium
+                                        }
+                                    }
                                 }
 
                                 StyledText {
@@ -195,6 +247,34 @@ Item {
                                 spacing: Theme.spacingS
                                 anchors.verticalCenter: parent.verticalCenter
 
+                                DankActionButton {
+                                    id: greeterToggleBtn
+                                    readonly property bool actionBlocked: root.operationPending
+                                    buttonSize: 36
+                                    iconSize: 20
+                                    iconName: userRow.modelData.isGreeter ? "login" : "how_to_reg"
+                                    iconColor: userRow.modelData.isGreeter ? Theme.secondary : Theme.surfaceVariantText
+                                    opacity: actionBlocked ? 0.4 : 1.0
+                                    tooltipText: userRow.modelData.isGreeter ? I18n.tr("Remove greeter login access") : I18n.tr("Allow greeter login access")
+                                    tooltipSide: "left"
+                                    onClicked: {
+                                        if (actionBlocked)
+                                            return;
+                                        const enableGreeter = !userRow.modelData.isGreeter;
+                                        greeterToggleConfirm.showWithOptions({
+                                            title: enableGreeter ? I18n.tr("Allow greeter access?") : I18n.tr("Remove greeter access?"),
+                                            message: enableGreeter ? I18n.tr("Add \"%1\" to the %2 group? They must log out and back in, then run dms greeter sync --profile to publish their login-screen theme.").arg(userRow.modelData.username).arg(UsersService.greeterGroup) : I18n.tr("Remove \"%1\" from the %2 group?").arg(userRow.modelData.username).arg(UsersService.greeterGroup),
+                                            confirmText: enableGreeter ? I18n.tr("Allow") : I18n.tr("Remove"),
+                                            confirmColor: Theme.primary,
+                                            onConfirm: () => {
+                                                root.operationPending = true;
+                                                root.statusText = "";
+                                                UsersService.setGreeterAccess(userRow.modelData.username, enableGreeter, null);
+                                            }
+                                        });
+                                    }
+                                }
+
                                 DankActionButton {
                                     id: adminToggleBtn
                                     readonly property bool actionBlocked: root.operationPending || (userRow.isLastAdmin && userRow.modelData.isAdmin)
@@ -380,6 +460,15 @@ Item {
                     onToggled: checked => root.pendingAdmin = checked
                 }
 
+                SettingsToggleRow {
+                    settingKey: "createUserGreeter"
+                    tags: ["user", "greeter", "login", "sync"]
+                    text: I18n.tr("Allow greeter login access")
+                    description: I18n.tr("Add the new user to the %1 group so they can run dms greeter sync --profile.").arg(UsersService.greeterGroup)
+                    checked: root.pendingGreeter
+                    onToggled: checked => root.pendingGreeter = checked
+                }
+
                 Row {
                     width: parent.width
                     spacing: Theme.spacingM
@@ -395,7 +484,7 @@ Item {
                                 return;
                             root.operationPending = true;
                             root.statusText = "";
-                            UsersService.createUser(root.pendingUsername, root.pendingPassword, root.pendingAdmin, null);
+                            UsersService.createUser(root.pendingUsername, root.pendingPassword, root.pendingAdmin, root.pendingGreeter, null);
                         }
                     }
 

quickshell/Services/GreeterUsersService.qml

@@ -0,0 +1,163 @@
+pragma Singleton
+
+import QtQuick
+import Quickshell
+import Quickshell.Io
+import qs.Common
+
+Singleton {
+    id: root
+
+    readonly property var log: Log.scoped("GreeterUsersService")
+
+    readonly property string greetCfgDir: Quickshell.env("DMS_GREET_CFG_DIR") || "/var/cache/dms-greeter"
+    readonly property string usersCacheDir: greetCfgDir + "/users"
+
+    property var users: []
+    property var usernames: []
+    property var profileImageMap: ({})
+    property bool loaded: false
+    property bool refreshing: false
+
+    Component.onCompleted: refresh()
+
+    function refresh() {
+        if (refreshing)
+            return;
+        refreshing = true;
+        _loadUsers();
+    }
+
+    function displayName(username) {
+        const u = _findUser(username);
+        if (!u)
+            return username || "";
+        const gecos = (u.gecos || "").trim();
+        return gecos.length > 0 ? gecos : username;
+    }
+
+    function optionLabel(username) {
+        const label = displayName(username);
+        return label !== username ? label : username;
+    }
+
+    function usernameFromOptionLabel(label) {
+        for (let i = 0; i < users.length; i++) {
+            if (root.optionLabel(users[i].username) === label)
+                return users[i].username;
+        }
+        return label;
+    }
+
+    function hasSyncedTheme(username) {
+        if (!username)
+            return false;
+        return syncedThemePaths[username] === true;
+    }
+
+    property var syncedThemePaths: ({})
+
+    function userCacheDir(username) {
+        if (!username)
+            return "";
+        return usersCacheDir + "/" + username;
+    }
+
+    function syncedSettingsPath(username) {
+        const dir = userCacheDir(username);
+        return dir ? dir + "/settings.json" : "";
+    }
+
+    function _findUser(name) {
+        for (let i = 0; i < users.length; i++) {
+            if (users[i].username === name)
+                return users[i];
+        }
+        return null;
+    }
+
+    function _loadUsers() {
+        Proc.runCommand("greeterUsersService-loadUsers", ["sh", "-c", "getent passwd | awk -F: '$3>=1000 && $3<60000 && $1!=\"nobody\" {print $1\":\"$3\":\"$5\":\"$6\":\"$7}'"], (output, exitCode) => {
+            const lines = (output || "").trim().split("\n").filter(l => l.length > 0);
+            const list = [];
+            const names = [];
+            for (let i = 0; i < lines.length; i++) {
+                const parts = lines[i].split(":");
+                if (parts.length < 5)
+                    continue;
+                const username = parts[0];
+                list.push({
+                    username,
+                    uid: parseInt(parts[1], 10),
+                    gecos: (parts[2] || "").split(",")[0],
+                    home: parts[3] || "",
+                    shell: parts[4] || ""
+                });
+                names.push(username);
+            }
+            list.sort((a, b) => a.username.localeCompare(b.username));
+            names.sort((a, b) => a.localeCompare(b));
+            root.users = list;
+            root.usernames = names;
+            root.loaded = true;
+            root.refreshing = false;
+            _refreshSyncedThemeFlags();
+            _loadProfileIcons();
+        }, 0);
+    }
+
+    function _refreshSyncedThemeFlags() {
+        if (usernames.length === 0) {
+            syncedThemePaths = ({});
+            return;
+        }
+        const checks = usernames.map(u => `[ -f "${syncedSettingsPath(u)}" ] && echo "${u}:1" || echo "${u}:0"`).join("; ");
+        Proc.runCommand("greeterUsersService-syncedThemes", ["sh", "-c", checks], (output, exitCode) => {
+            const map = {};
+            const lines = (output || "").trim().split("\n").filter(l => l.length > 0);
+            for (let i = 0; i < lines.length; i++) {
+                const parts = lines[i].split(":");
+                if (parts.length >= 2)
+                    map[parts[0]] = parts[1] === "1";
+            }
+            root.syncedThemePaths = map;
+        }, 0);
+    }
+
+    function profileImagePath(username) {
+        if (!username)
+            return "";
+        return profileImageMap[username] || "";
+    }
+
+    function _loadProfileIcons() {
+        if (users.length === 0) {
+            profileImageMap = ({});
+            return;
+        }
+        const script = users.map(u => {
+            const safeUser = u.username.replace(/'/g, "'\\''");
+            const safeHome = (u.home || "").replace(/'/g, "'\\''");
+            const cacheDir = usersCacheDir + "/" + u.username;
+            return `( icon=""; for f in "${cacheDir}/profile.jpg" "${cacheDir}/profile.jpeg" "${cacheDir}/profile.png" "${cacheDir}/profile.webp" "/var/lib/AccountsService/icons/${safeUser}" "${safeHome}/.face" "${safeHome}/.face.icon"; do if [ -f "$f" ] && [ -r "$f" ]; then icon="$f"; break; fi; done; echo "${u.username}:$icon" )`;
+        }).join("; ");
+        Proc.runCommand("greeterUsersService-profileIcons", ["sh", "-c", script], (output, exitCode) => {
+            const map = {};
+            const lines = (output || "").trim().split("\n").filter(l => l.length > 0);
+            for (let i = 0; i < lines.length; i++) {
+                const idx = lines[i].indexOf(":");
+                if (idx <= 0)
+                    continue;
+                const user = lines[i].substring(0, idx);
+                const icon = lines[i].substring(idx + 1).trim();
+                map[user] = icon && icon.length > 0 ? icon : "";
+            }
+            for (let j = 0; j < users.length; j++) {
+                const u = users[j].username;
+                if (!(u in map))
+                    map[u] = "";
+            }
+            root.profileImageMap = map;
+        }, 0);
+    }
+}

quickshell/Services/PortalService.qml

@@ -239,11 +239,23 @@ Singleton {
         });
     }
 
+    property string pendingGreeterProfileUser: ""
+
     function getGreeterUserProfileImage(username) {
         if (!username) {
             profileImage = "";
+            pendingGreeterProfileUser = "";
             return;
         }
+        if (typeof GreeterUsersService !== "undefined") {
+            const cachedPath = GreeterUsersService.profileImagePath(username);
+            if (cachedPath) {
+                profileImage = cachedPath;
+                pendingGreeterProfileUser = "";
+                return;
+            }
+        }
+        pendingGreeterProfileUser = username;
         userProfileCheckProcess.command = ["bash", "-c", `uid=$(id -u ${username} 2>/dev/null) && [ -n "$uid" ] && dbus-send --system --print-reply --dest=org.freedesktop.Accounts /org/freedesktop/Accounts/User$uid org.freedesktop.DBus.Properties.Get string:org.freedesktop.Accounts.User string:IconFile 2>/dev/null | grep -oP 'string "\\K[^"]+' || echo ""`];
         userProfileCheckProcess.running = true;
     }
@@ -261,12 +273,14 @@ Singleton {
                 } else {
                     root.profileImage = "";
                 }
+                root.pendingGreeterProfileUser = "";
             }
         }
 
         onExited: exitCode => {
-            if (exitCode !== 0) {
+            if (exitCode !== 0 && root.pendingGreeterProfileUser !== "") {
                 root.profileImage = "";
+                root.pendingGreeterProfileUser = "";
             }
         }
     }

quickshell/Services/UsersService.qml

@@ -12,7 +12,9 @@ Singleton {
 
     property var users: []
     property string adminGroup: "wheel"
+    property string greeterGroup: "greeter"
     property var adminMembers: []
+    property var greeterMembers: []
     property bool refreshing: false
 
     signal operationCompleted(string op, string username, bool success, string message)
@@ -69,6 +71,21 @@ Singleton {
         Proc.runCommand("usersService-adminMembers", ["sh", "-c", "getent group " + root.adminGroup + " | awk -F: '{print $4}'"], (output, exitCode) => {
             const members = (output || "").trim().split(",").map(s => s.trim()).filter(s => s.length > 0);
             root.adminMembers = members;
+            _detectGreeterGroup();
+        }, 0);
+    }
+
+    function _detectGreeterGroup() {
+        Proc.runCommand("usersService-detectGreeterGroup", ["sh", "-c", "getent group greeter >/dev/null 2>&1 && echo greeter || (getent group greetd >/dev/null 2>&1 && echo greetd || (getent group _greeter >/dev/null 2>&1 && echo _greeter || echo greeter))"], (output, exitCode) => {
+            root.greeterGroup = (output || "").trim() || "greeter";
+            _loadGreeterMembers();
+        }, 0);
+    }
+
+    function _loadGreeterMembers() {
+        Proc.runCommand("usersService-greeterMembers", ["sh", "-c", "getent group " + root.greeterGroup + " 2>/dev/null | awk -F: '{print $4}'"], (output, exitCode) => {
+            const members = (output || "").trim().split(",").map(s => s.trim()).filter(s => s.length > 0);
+            root.greeterMembers = members;
             _loadUsers();
         }, 0);
     }
@@ -78,8 +95,11 @@ Singleton {
             const lines = (output || "").trim().split("\n").filter(l => l.length > 0);
             const list = [];
             const adminSet = {};
+            const greeterSet = {};
             for (let i = 0; i < root.adminMembers.length; i++)
                 adminSet[root.adminMembers[i]] = true;
+            for (let i = 0; i < root.greeterMembers.length; i++)
+                greeterSet[root.greeterMembers[i]] = true;
 
             for (let i = 0; i < lines.length; i++) {
                 const parts = lines[i].split(":");
@@ -92,7 +112,8 @@ Singleton {
                     gecos: (parts[2] || "").split(",")[0],
                     home: parts[3] || "",
                     shell: parts[4] || "",
-                    isAdmin: adminSet[username] === true
+                    isAdmin: adminSet[username] === true,
+                    isGreeter: greeterSet[username] === true
                 });
             }
             list.sort((a, b) => a.username.localeCompare(b.username));
@@ -101,7 +122,7 @@ Singleton {
         }, 0);
     }
 
-    function createUser(username, password, addToAdmin, callback) {
+    function createUser(username, password, addToAdmin, addToGreeter, callback) {
         if (!isValidUsername(username)) {
             _emit("create", username, false, I18n.tr("Invalid username"), callback);
             return;
@@ -114,7 +135,7 @@ Singleton {
             _emit("create", username, false, I18n.tr("User already exists"), callback);
             return;
         }
-        _runUseradd(username, password, addToAdmin === true, callback);
+        _runUseradd(username, password, addToAdmin === true, addToGreeter === true, callback);
     }
 
     function setPassword(username, newPassword, callback) {
@@ -156,6 +177,55 @@ Singleton {
         _runAdminToggle(username, makeAdmin === true, callback);
     }
 
+    function setGreeterAccess(username, enable, callback) {
+        if (!userExists(username)) {
+            _emit("greeter", username, false, I18n.tr("User not found"), callback);
+            return;
+        }
+        _runGreeterToggle(username, enable === true, callback);
+    }
+
+    function _finishCreateUser(targetUser, addAdmin, addGreeter, outerCb) {
+        function finish(success, message) {
+            root._emit("create", targetUser, success, message, outerCb);
+        }
+
+        function maybeGreeter(onDone) {
+            if (addGreeter) {
+                root._runGreeterToggle(targetUser, true, (greeterOk, greeterMsg) => {
+                    if (greeterOk)
+                        onDone();
+                    else
+                        finish(false, greeterMsg);
+                });
+            } else {
+                onDone();
+            }
+        }
+
+        function createMessage() {
+            if (addAdmin && addGreeter)
+                return I18n.tr("User created with administrator and greeter login access");
+            if (addAdmin)
+                return I18n.tr("User created with administrator privileges");
+            if (addGreeter)
+                return I18n.tr("User created with greeter login access");
+            return I18n.tr("User created");
+        }
+
+        if (addAdmin) {
+            root._runAdminToggle(targetUser, true, (adminOk, adminMsg) => {
+                if (!adminOk) {
+                    finish(false, adminMsg);
+                    return;
+                }
+                maybeGreeter(() => finish(true, createMessage()));
+            });
+        } else {
+            maybeGreeter(() => finish(true, createMessage()));
+        }
+    }
+
     function _emit(op, username, success, message, callback) {
         root.operationCompleted(op, username, success, message);
         if (typeof callback === "function") {
@@ -174,6 +244,7 @@ Singleton {
             property string targetUser: ""
             property string targetPassword: ""
             property bool addAdmin: false
+            property bool addGreeter: false
             property var cb: null
             property string capturedErr: ""
             running: false
@@ -191,6 +262,7 @@ Singleton {
                 const targetUser = useraddProc.targetUser;
                 const targetPassword = useraddProc.targetPassword;
                 const addAdmin = useraddProc.addAdmin;
+                const addGreeter = useraddProc.addGreeter;
                 const outerCb = useraddProc.cb;
                 Qt.callLater(() => useraddProc.destroy());
 
@@ -199,17 +271,7 @@ Singleton {
                         svc._emit("create", targetUser, false, pwMsg, outerCb);
                         return;
                     }
-                    if (addAdmin) {
-                        svc._runAdminToggle(targetUser, true, (adminOk, adminMsg) => {
-                            if (adminOk) {
-                                svc._emit("create", targetUser, true, I18n.tr("User created with administrator privileges"), outerCb);
-                            } else {
-                                svc._emit("create", targetUser, false, adminMsg, outerCb);
-                            }
-                        });
-                    } else {
-                        svc._emit("create", targetUser, true, I18n.tr("User created"), outerCb);
-                    }
+                    svc._finishCreateUser(targetUser, addAdmin, addGreeter, outerCb);
                 });
             }
         }
@@ -290,6 +352,36 @@ Singleton {
         }
     }
 
+    Component {
+        id: greeterToggleComp
+        Process {
+            id: greeterToggleProc
+            property string targetUser: ""
+            property bool enableGreeter: false
+            property var cb: null
+            property string capturedErr: ""
+            running: false
+            stdout: StdioCollector {}
+            stderr: StdioCollector {
+                onStreamFinished: greeterToggleProc.capturedErr = text || ""
+            }
+            onExited: exitCode => {
+                const targetUser = greeterToggleProc.targetUser;
+                const enableGreeter = greeterToggleProc.enableGreeter;
+                const cb = greeterToggleProc.cb;
+                const err = (greeterToggleProc.capturedErr || "").trim();
+                Qt.callLater(() => greeterToggleProc.destroy());
+
+                if (exitCode !== 0) {
+                    root._emit("greeter", targetUser, false, err || I18n.tr("usermod failed (exit %1)").arg(exitCode), cb);
+                } else {
+                    root.refresh();
+                    root._emit("greeter", targetUser, true, enableGreeter ? I18n.tr("Granted greeter login access") : I18n.tr("Removed greeter login access"), cb);
+                }
+            }
+        }
+    }
+
     Component {
         id: adminToggleComp
         Process {
@@ -320,12 +412,13 @@ Singleton {
         }
     }
 
-    function _runUseradd(username, password, addToAdmin, callback) {
+    function _runUseradd(username, password, addToAdmin, addToGreeter, callback) {
         const proc = useraddComp.createObject(root, {
             command: ["pkexec", "useradd", "-m", "-s", "/bin/bash", username],
             targetUser: username,
             targetPassword: password,
             addAdmin: addToAdmin,
+            addGreeter: addToGreeter,
             cb: callback
         });
         proc.running = true;
@@ -361,5 +454,16 @@ Singleton {
         proc.running = true;
     }
 
+    function _runGreeterToggle(username, enableGreeter, callback) {
+        const cmd = enableGreeter ? ["pkexec", "usermod", "-aG", root.greeterGroup, username] : ["pkexec", "gpasswd", "-d", username, root.greeterGroup];
+        const proc = greeterToggleComp.createObject(root, {
+            command: cmd,
+            targetUser: username,
+            enableGreeter: enableGreeter,
+            cb: callback
+        });
+        proc.running = true;
+    }
+
     Component.onCompleted: refresh()
 }

quickshell/Widgets/DankDropdown.qml

@@ -58,6 +58,30 @@ Item {
         dropdownMenu.close();
     }
 
+    function openDropdownMenu() {
+        if (dropdownMenu.visible) {
+            dropdownMenu.close();
+            return;
+        }
+        if (root.options.length === 0)
+            return;
+
+        dropdownMenu.open();
+
+        let currentIndex = root.options.indexOf(root.currentValue);
+        listView.positionViewAtIndex(currentIndex >= 0 ? currentIndex : 0, ListView.Beginning);
+
+        const pos = dropdown.mapToItem(Overlay.overlay, 0, 0);
+        const popupW = dropdownMenu.width;
+        const popupH = dropdownMenu.height;
+        const overlayH = Overlay.overlay.height;
+        const goUp = root.openUpwards || pos.y + dropdown.height + popupH + 4 > overlayH;
+        dropdownMenu.x = root.alignPopupRight ? pos.x + dropdown.width - popupW : pos.x - (root.popupWidthOffset / 2);
+        dropdownMenu.y = goUp ? pos.y - popupH - 4 : pos.y + dropdown.height + 4;
+        if (root.enableFuzzySearch)
+            searchField.forceActiveFocus();
+    }
+
     function resetSearch() {
         searchField.text = "";
         dropdownMenu.fzfFinder = null;
@@ -123,27 +147,7 @@ Item {
             anchors.fill: parent
             hoverEnabled: true
             cursorShape: Qt.PointingHandCursor
-            onClicked: {
-                if (dropdownMenu.visible) {
-                    dropdownMenu.close();
-                    return;
-                }
-
-                dropdownMenu.open();
-
-                let currentIndex = root.options.indexOf(root.currentValue);
-                listView.positionViewAtIndex(currentIndex, ListView.Beginning);
-
-                const pos = dropdown.mapToItem(Overlay.overlay, 0, 0);
-                const popupW = dropdownMenu.width;
-                const popupH = dropdownMenu.height;
-                const overlayH = Overlay.overlay.height;
-                const goUp = root.openUpwards || pos.y + dropdown.height + popupH + 4 > overlayH;
-                dropdownMenu.x = root.alignPopupRight ? pos.x + dropdown.width - popupW : pos.x - (root.popupWidthOffset / 2);
-                dropdownMenu.y = goUp ? pos.y - popupH - 4 : pos.y + dropdown.height + 4;
-                if (root.enableFuzzySearch)
-                    searchField.forceActiveFocus();
-            }
+            onClicked: root.openDropdownMenu()
         }
 
         Row {
@@ -165,10 +169,10 @@ Item {
             }
 
             StyledText {
-                text: root.currentValue
-                font.pixelSize: Theme.fontSizeMedium
-                color: Theme.surfaceText
                 anchors.verticalCenter: parent.verticalCenter
+                text: root.currentValue !== "" ? root.currentValue : root.emptyText
+                font.pixelSize: Theme.fontSizeMedium
+                color: root.currentValue !== "" ? Theme.surfaceText : Theme.outline
                 width: contentRow.width - (contentRow.children[0].visible ? contentRow.children[0].width + contentRow.spacing : 0)
                 elide: Text.ElideRight
                 wrapMode: Text.NoWrap