feat: suppress systemctl inotify noise, cache service state in menu loop

main.sh

@@ -82,6 +82,19 @@ run_elevated() {
   "$ELEVATE_CMD" "$@"
 }
 
+# systemctl on some systems logs "Failed to add a watch ... inotify watch limit reached"
+# to stderr when it talks to PID 1. The operation itself succeeds; suppress the
+# noisy line so it does not pollute the TUI.
+run_systemctl() {
+  local line rc
+  while IFS= read -r line; do
+    [[ "$line" == *"Failed to add a watch"*"inotify watch limit reached"* ]] && continue
+    printf '%s\n' "$line"
+  done < <(systemctl "$@" 2>&1) || true
+  rc=${PIPESTATUS[0]}
+  return "$rc"
+}
+
 check_deps() {
   local missing=() cmd
   for cmd in bash curl jq systemctl date stat mktemp sha256sum cmp install dirname basename cut mkdir chmod cp cat printf; do
@@ -203,7 +216,7 @@ normalize_service_name() {
 
 validate_service() {
   local svc="$1"
-  systemctl --no-ask-password cat "$svc" >/dev/null 2>&1
+  run_systemctl --no-ask-password cat "$svc" >/dev/null 2>&1
 }
 
 ensure_target_parent() {
@@ -422,13 +435,13 @@ install_xray_config() {
 restart_xray_service() {
   local service="$1"
   info "Перезапускаю ${service}…"
-  if systemctl --no-ask-password restart "$service" 2>/dev/null; then
+  if run_systemctl --no-ask-password restart "$service" 2>/dev/null; then
     ok "Служба ${service} перезапущена."
     return 0
   fi
 
   elevate_available || die "Не удалось перезапустить ${service}: нет прав и не найден doas/run0/pkexec/sudo."
-  run_elevated systemctl --no-ask-password restart "$service"
+  run_elevated run_systemctl --no-ask-password restart "$service"
   ok "Служба ${service} перезапущена."
 }
 
@@ -540,12 +553,12 @@ xray_socks_endpoint() {
 
 service_state_raw() {
   local service="$1"
-  systemctl --no-ask-password is-active "$service" 2>/dev/null || true
+  run_systemctl --no-ask-password is-active "$service" 2>/dev/null || true
 }
 
 service_enabled_raw() {
   local service="$1"
-  systemctl --no-ask-password is-enabled "$service" 2>/dev/null || true
+  run_systemctl --no-ask-password is-enabled "$service" 2>/dev/null || true
 }
 
 service_state_colored() {
@@ -582,7 +595,7 @@ run_service_action() {
   say ""
   info "systemctl ${action} ${service}"
 
-  if systemctl --no-ask-password "$action" "$service" 2>/dev/null; then
+  if run_systemctl --no-ask-password "$action" "$service" 2>/dev/null; then
     ok "Готово: ${service} → ${action}."
     pause_screen
     hide_cursor
@@ -596,7 +609,7 @@ run_service_action() {
     return 1
   }
 
-  if run_elevated systemctl --no-ask-password "$action" "$service"; then
+  if run_elevated run_systemctl --no-ask-password "$action" "$service"; then
     ok "Готово: ${service} → ${action}."
   else
     warn "systemctl ${action} завершился с ошибкой. Проверьте статус службы."
@@ -612,7 +625,7 @@ show_service_status_screen() {
   clear_screen
   say "${C_BOLD}${C_MAGENTA}✦ Статус службы ${service}${C_RESET}"
   say ""
-  if ! systemctl --no-ask-password --no-pager --full status "$service" -n 18; then
+  if ! run_systemctl --no-ask-password --no-pager --full status "$service" -n 18; then
     warn "Не удалось прочитать статус через systemctl."
   fi
   pause_screen
@@ -663,6 +676,7 @@ render_profile_row() {
 render_menu() {
   local cursor="$1" count saved_index i cache_info selected_name
   local service service_state service_enabled xray_config socks_endpoint
+  local now
 
   count="$(profile_count)"
   saved_index="$(cfg_get selected_index)"
@@ -671,8 +685,17 @@ render_menu() {
   xray_config="$(cfg_get xray_config)"
   socks_endpoint="$(xray_socks_endpoint "$xray_config")"
   cache_info="$(subscription_update_info)"
-  service_state="$(service_state_raw "$service")"
-  service_enabled="$(service_enabled_raw "$service")"
+
+  # Polling systemd on every keypress can exhaust inotify watches quickly.
+  # Cache the state for a short interval inside the menu loop.
+  now="$(date +%s)"
+  if [[ -z "${_MENU_STATE_CACHE_TS:-}" || $(( now - _MENU_STATE_CACHE_TS )) -gt 2 ]]; then
+    _MENU_STATE_CACHE_TS="$now"
+    _MENU_STATE_CACHE_VALUE="$(service_state_raw "$service")"
+    _MENU_ENABLED_CACHE_VALUE="$(service_enabled_raw "$service")"
+  fi
+  service_state="${_MENU_STATE_CACHE_VALUE}"
+  service_enabled="${_MENU_ENABLED_CACHE_VALUE}"
 
   clear_screen
   say "${C_BOLD}${C_MAGENTA}✦ Xray JSON TUI${C_RESET}"
@@ -751,15 +774,19 @@ menu() {
         ;;
       s|S)
         run_service_action start "$service"
+        unset _MENU_STATE_CACHE_TS _MENU_STATE_CACHE_VALUE _MENU_ENABLED_CACHE_VALUE
         ;;
       o|O)
         run_service_action stop "$service"
+        unset _MENU_STATE_CACHE_TS _MENU_STATE_CACHE_VALUE _MENU_ENABLED_CACHE_VALUE
         ;;
       e|E)
         run_service_action restart "$service"
+        unset _MENU_STATE_CACHE_TS _MENU_STATE_CACHE_VALUE _MENU_ENABLED_CACHE_VALUE
         ;;
       v|V)
         show_service_status_screen "$service"
+        unset _MENU_STATE_CACHE_TS _MENU_STATE_CACHE_VALUE _MENU_ENABLED_CACHE_VALUE
         ;;
       q|Q)
         clear_screen
@@ -770,6 +797,7 @@ menu() {
         show_cursor
         say ""
         apply_selection "$cursor"
+        unset _MENU_STATE_CACHE_TS _MENU_STATE_CACHE_VALUE _MENU_ENABLED_CACHE_VALUE
         pause_screen
         hide_cursor
         ;;