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bh=qifxhGbIIW3jJYdwCvPlOZZ/iEIUOfnWfM2Zp+tBOx8=; b=RkZDF6fnFSBDyfwTe8xe0JT8OCrOQR/gdf2IyxOpfyObm0cMT102ekcgRxAXZ1JHLFr8S8 Pc+5uHua/j6yz9h/EMunkiDaVNhjHSAwtSUutM0jh4w3fjTf5HWbTSxFddNRkw07FcVTcd xSu/KVzzD0uMtdgg9N+ZKBWMVsQ032k= X-MC-Unique: IucfGiokOe6StbxDO8qLmQ-1 From: John Snow To: qemu-devel@nongnu.org Subject: [PATCH v8 02/31] python/machine: use subprocess.DEVNULL instead of open(os.path.devnull) Date: Thu, 27 May 2021 17:16:46 -0400 Message-Id: <20210527211715.394144-3-jsnow@redhat.com> In-Reply-To: <20210527211715.394144-1-jsnow@redhat.com> References: <20210527211715.394144-1-jsnow@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 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-Type: text/plain; charset="utf-8" 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; helo=lists.gnu.org; Received-SPF: pass client-ip=216.205.24.124; envelope-from=jsnow@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.374, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Thomas Huth , Eduardo Habkost , qemu-block@nongnu.org, =?UTF-8?q?Alex=20Benn=C3=A9e?= , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Wainer dos Santos Moschetta , Max Reitz , Willian Rampazzo , Cleber Rosa , John Snow Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) One less file resource to manage, and it helps quiet some pylint >=3D 2.8.0 warnings about not using a with-context manager for the open call. Signed-off-by: John Snow Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Cleber Rosa Message-id: 20210517184808.3562549-3-jsnow@redhat.com Signed-off-by: John Snow --- python/qemu/machine.py | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/python/qemu/machine.py b/python/qemu/machine.py index b379fcbe726..5b87e9ce024 100644 --- a/python/qemu/machine.py +++ b/python/qemu/machine.py @@ -223,9 +223,8 @@ def send_fd_scm(self, fd: Optional[int] =3D None, assert fd is not None fd_param.append(str(fd)) =20 - devnull =3D open(os.path.devnull, 'rb') proc =3D subprocess.Popen( - fd_param, stdin=3Ddevnull, stdout=3Dsubprocess.PIPE, + fd_param, stdin=3Dsubprocess.DEVNULL, stdout=3Dsubprocess.PIPE, stderr=3Dsubprocess.STDOUT, close_fds=3DFalse ) output =3D proc.communicate()[0] @@ -391,7 +390,6 @@ def _launch(self) -> None: """ Launch the VM and establish a QMP connection """ - devnull =3D open(os.path.devnull, 'rb') self._pre_launch() self._qemu_full_args =3D tuple( chain(self._wrapper, @@ -401,7 +399,7 @@ def _launch(self) -> None: ) LOG.debug('VM launch command: %r', ' '.join(self._qemu_full_args)) self._popen =3D subprocess.Popen(self._qemu_full_args, - stdin=3Ddevnull, + stdin=3Dsubprocess.DEVNULL, stdout=3Dself._qemu_log_file, stderr=3Dsubprocess.STDOUT, shell=3DFalse, --=20 2.31.1