Warning once when iwgetid is not available.

wrolpi/admin.py

@@ -12,7 +12,8 @@ logger = logger.getChild(__name__)
 
 POWER_SAVE_FREQ = 'powersave'  # noqa
 
-warn_once = get_warn_once('Unable to use nmcli', logger)
+nmcli_warn_once = get_warn_once('Unable to use nmcli', logger)
+iwgetid_warn_once = get_warn_once('Unable to use iwgetid', logger)
 
 
 class HotspotStatus(enum.Enum):
@@ -37,7 +38,7 @@ def hotspot_status() -> HotspotStatus:
     try:
         output = subprocess.check_output(cmd, stderr=subprocess.PIPE).decode().strip()
     except Exception as e:
-        warn_once(e)
+        nmcli_warn_once(e)
         return HotspotStatus.unknown
 
     for line in output.splitlines():
@@ -69,6 +70,9 @@ def get_current_ssid(interface='wlan0') -> str | None:
         else:
             logger.error(f'Failed to get current ssid: {result.stderr}')
             return None
+    except FileNotFoundError as e:
+        iwgetid_warn_once(e)
+        return None
     except Exception as e:
         logger.error('Failed to get current ssid', exc_info=e)
         return None

wrolpi/common.py

@@ -1563,12 +1563,12 @@ def get_warn_once(message: str, logger__: logging.Logger, level=logging.ERROR):
     """Create a function that will report an error only once.
 
     This is used when a function will be called many times, but the error is not important."""
-    event = multiprocessing.Event()
 
     def warn_once(exception: Exception):
-        if not event.is_set():
+        from wrolpi.api_utils import api_app
+        if not api_app.shared_ctx.warn_once.get(message):
             logger__.log(level, message, exc_info=exception)
-            event.set()
+            api_app.shared_ctx.warn_once.update({message: True})
 
     return warn_once
 

wrolpi/contexts.py

@@ -47,6 +47,9 @@ def attach_shared_contexts(app: Sanic):
     app.shared_ctx.single_tasks_started = multiprocessing.Event()
     app.shared_ctx.flags_initialized = multiprocessing.Event()
 
+    # Warnings
+    app.shared_ctx.warn_once = manager.dict()
+
     # Locks
     app.shared_ctx.config_save_lock = multiprocessing.Lock()