From nobody Wed Feb 11 03:02:12 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1501491236208253.36576714933062; Mon, 31 Jul 2017 01:53:56 -0700 (PDT) Received: from localhost ([::1]:58160 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dc6SY-0007Em-TB for importer@patchew.org; Mon, 31 Jul 2017 04:53:54 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53348) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dc6Qq-0006AZ-8r for qemu-devel@nongnu.org; Mon, 31 Jul 2017 04:52:12 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dc6Qm-0000RL-Ce for qemu-devel@nongnu.org; Mon, 31 Jul 2017 04:52:08 -0400 Received: from mx1.redhat.com ([209.132.183.28]:51404) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dc6Qm-0000QV-6k for qemu-devel@nongnu.org; Mon, 31 Jul 2017 04:52:04 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 9674F372205; Mon, 31 Jul 2017 08:52:01 +0000 (UTC) Received: from t460p.pahim.org.com (ovpn-204-234.brq.redhat.com [10.40.204.234]) by smtp.corp.redhat.com (Postfix) with ESMTP id E13B518225; Mon, 31 Jul 2017 08:51:58 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 9674F372205 Authentication-Results: ext-mx05.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx05.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=apahim@redhat.com From: Amador Pahim To: qemu-devel@nongnu.org Date: Mon, 31 Jul 2017 10:51:04 +0200 Message-Id: <20170731085110.1050-2-apahim@redhat.com> In-Reply-To: <20170731085110.1050-1-apahim@redhat.com> References: <20170731085110.1050-1-apahim@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Mon, 31 Jul 2017 08:52:01 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v6 1/7] qemu.py: use poll() instead of 'returncode' X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, ldoktor@redhat.com, famz@redhat.com, ehabkost@redhat.com, stefanha@gmail.com, Amador Pahim , armbru@redhat.com, mreitz@redhat.com, crosa@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" The 'returncode' Popen attribute is not guaranteed to be updated. It actually depends on a call to either poll(), wait() or communicate(). On the other hand, poll() will: "Check if child process has terminated. Set and return returncode attribute." Let's use the poll() to check whether the process is running and also to get the updated process exit code, when the process is finished. Signed-off-by: Amador Pahim Reviewed-by: Fam Zheng Reviewed-by: Stefan Hajnoczi --- scripts/qemu.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/scripts/qemu.py b/scripts/qemu.py index 880e3e8219..2f1984c93c 100644 --- a/scripts/qemu.py +++ b/scripts/qemu.py @@ -86,12 +86,12 @@ class QEMUMachine(object): raise =20 def is_running(self): - return self._popen and (self._popen.returncode is None) + return self._popen and (self._popen.poll() is None) =20 def exitcode(self): if self._popen is None: return None - return self._popen.returncode + return self._popen.poll() =20 def get_pid(self): if not self.is_running(): --=20 2.13.3