[+] fix exit status for commands

1. fix intercept_output when the process has died
    before select poll has been started;

python/online/fxreader/pr34/commands.py

@@ -132,8 +132,11 @@ def intercept_output(
             break
 
         t2 = t1.poll(100)
-        if len(t2) == 1 and (t2[0][1] & select.POLLIN) > 0 and \
-            not (isinstance(last_data, bytes) and len(last_data) == 0):
+        if (
+            len(t2) == 1 and (t2[0][1] & select.POLLIN) > 0 and \
+            not (isinstance(last_data, bytes) and len(last_data) == 0) or
+            not current_subprocess.poll() is None
+        ):
             t3 = current_subprocess.stdout.peek()
 
             t4: bytes = current_subprocess.stdout.read(len(t3))
@@ -1557,6 +1560,12 @@ def pass_ssh_osx(argv):
                     last_chunk = chunk
                     break
 
+            assert not p.poll() is None
+
+            if p.poll() != 0:
+                logger.error(p.stderr.read())
+                sys.exit(p.poll())
+
             assert not last_chunk is None
             assert last_chunk['returncode'] == 0
 
@@ -3844,7 +3853,7 @@ class Command(enum.StrEnum):
 
 def commands_cli(
     argv: Optional[list[str]] = None
-) -> None:
+) -> int:
     if argv is None:
         argv = sys.argv[1:]
 
@@ -3933,14 +3942,14 @@ def commands_cli(
             else:
                 raise NotImplementedError
     except SystemExit:
-        pass
+        raise
     except Exception:
         msg = 'not implemented\n%s' % traceback.format_exc()
         logging.error(msg)
-
-    if not msg is None:
-        custom_notify(msg=msg)
+    finally:
+        if not msg is None:
+            custom_notify(msg=msg)
 
 
 if __name__ == '__main__':
-    commands_cli()
+    sys.exit(commands_cli())