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bh=FI58MT0rdVh8lfWRdQy5VKlfy640+ZY53FvgViErefo=; b=b1WdOCykotHo6/umuYFP1Olx9TaVLff3y8cMxyaRPB4cxgFuVx54U1ct/zVMhMN0VSbl8h q35BO5qeV8kd4z+Stp8sdkchckg+mVWQH1yRVt5GxgYZI+2+gXKQ6/rcHKxmZ2NDw7eh9C J3wcJlCvsUHXg/BAFeEUcHZzOH8+Z6M= X-MC-Unique: 2XKnc-xRN-e2qVtqyneBBw-1 From: John Snow To: qemu-devel@nongnu.org Subject: [PULL 09/21] python/machine.py: fix _popen access Date: Tue, 20 Oct 2020 13:27:30 -0400 Message-Id: <20201020172742.1483258-10-jsnow@redhat.com> In-Reply-To: <20201020172742.1483258-1-jsnow@redhat.com> References: <20201020172742.1483258-1-jsnow@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jsnow@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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charset="utf-8" As always, Optional[T] causes problems with unchecked access. Add a helper that asserts the pipe is present before we attempt to talk with it. Signed-off-by: John Snow Reviewed-by: Kevin Wolf Message-id: 20201006235817.3280413-9-jsnow@redhat.com Signed-off-by: John Snow --- python/qemu/machine.py | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) diff --git a/python/qemu/machine.py b/python/qemu/machine.py index 3e9cf09fd2..4e762fcd52 100644 --- a/python/qemu/machine.py +++ b/python/qemu/machine.py @@ -131,7 +131,7 @@ def __init__(self, binary, args=3DNone, wrapper=3DNone,= name=3DNone, # Runstate self._qemu_log_path =3D None self._qemu_log_file =3D None - self._popen =3D None + self._popen: Optional['subprocess.Popen[bytes]'] =3D None self._events =3D [] self._iolog =3D None self._qmp_set =3D True # Enable QMP monitor by default. @@ -244,6 +244,12 @@ def is_running(self): """Returns true if the VM is running.""" return self._popen is not None and self._popen.poll() is None =20 + @property + def _subp(self) -> 'subprocess.Popen[bytes]': + if self._popen is None: + raise QEMUMachineError('Subprocess pipe not present') + return self._popen + def exitcode(self): """Returns the exit code if possible, or None.""" if self._popen is None: @@ -254,7 +260,7 @@ def get_pid(self): """Returns the PID of the running process, or None.""" if not self.is_running(): return None - return self._popen.pid + return self._subp.pid =20 def _load_io_log(self): if self._qemu_log_path is not None: @@ -415,8 +421,8 @@ def _hard_shutdown(self) -> None: waiting for the QEMU process to terminate. """ self._early_cleanup() - self._popen.kill() - self._popen.wait(timeout=3D60) + self._subp.kill() + self._subp.wait(timeout=3D60) =20 def _soft_shutdown(self, timeout: Optional[int], has_quit: bool =3D False) -> None: @@ -440,7 +446,7 @@ def _soft_shutdown(self, timeout: Optional[int], self._qmp.cmd('quit') =20 # May raise subprocess.TimeoutExpired - self._popen.wait(timeout=3Dtimeout) + self._subp.wait(timeout=3Dtimeout) =20 def _do_shutdown(self, timeout: Optional[int], has_quit: bool =3D False) -> None: --=20 2.26.2