Quiet handling and better message on unix socket bind error too.

sanic/mixins/startup.py

@@ -49,7 +49,7 @@ from sanic.application.motd import MOTD
 from sanic.application.state import ApplicationServerInfo, Mode, ServerStage
 from sanic.base.meta import SanicMeta
 from sanic.compat import OS_IS_WINDOWS, StartMethod
-from sanic.exceptions import ServerKilled
+from sanic.exceptions import SanicException, ServerKilled
 from sanic.helpers import Default, _default, is_atty
 from sanic.http.constants import HTTP
 from sanic.http.tls import get_ssl_context, process_to_context
@@ -880,12 +880,18 @@ class StartupMixin(metaclass=SanicMeta):
             manager.run()
         except ServerKilled:
             exit_code = 1
+        except SanicException as e:
+            exit_code = 1
+            kwargs = primary_server_info.settings
+            if e.quiet:
+                error_logger.error(str(e))
+            else:
+                raise
         except BaseException:
             kwargs = primary_server_info.settings
             error_logger.exception(
                 "Experienced exception while trying to serve"
             )
-            raise
         finally:
             logger.info("Server Stopped")
             for app in apps:

sanic/server/socket.py

@@ -47,10 +47,10 @@ def bind_unix_socket(path: str, *, mode=0o666, backlog=100) -> socket.socket:
     path = os.path.abspath(path)
     folder = os.path.dirname(path)
     if not os.path.isdir(folder):
-        raise FileNotFoundError(f"Socket folder does not exist: {folder}")
+        raise FileNotFoundError("Socket folder does not exist")
     try:
         if not stat.S_ISSOCK(os.stat(path, follow_symlinks=False).st_mode):
-            raise FileExistsError(f"Existing file is not a socket: {path}")
+            raise FileExistsError("Existing file is not a socket")
     except FileNotFoundError:
         pass
     # Create new socket with a random temporary name
@@ -103,7 +103,10 @@ def configure_socket(
     unix = server_settings["unix"]
     backlog = server_settings["backlog"]
     if unix:
+        try:
             sock = bind_unix_socket(unix, backlog=backlog)
+        except OSError as e:
+            raise ServerError(f"Error binding {unix}: {e}", quiet=True)
         server_settings["unix"] = unix
     if sock is None:
         try:
@@ -112,6 +115,17 @@ def configure_socket(
                 server_settings["port"],
                 backlog=backlog,
             )
+        except PermissionError:
+            p = server_settings["port"]
+            if not p or p >= 1024:
+                raise
+            addr = f"{server_settings['host']}:{p}"
+            error = ServerError(
+                f"Permission denied binding to {addr}.\n\n"
+                "Use `sudo sanic` to run on a privileged port.\n"
+            )
+            error.quiet = True
+            raise error
         except OSError as e:  # no cov
             error = ServerError(
                 f"Sanic server could not start: {e}.\n\n"