From nobody Sun Oct 5 21:12:24 2025 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.zoho.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 1493321046771556.2784062407275; Thu, 27 Apr 2017 12:24:06 -0700 (PDT) Received: from localhost ([::1]:33878 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3p1J-0004up-E0 for importer@patchew.org; Thu, 27 Apr 2017 15:24:05 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36473) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3ozp-0003pR-FG for qemu-devel@nongnu.org; Thu, 27 Apr 2017 15:22:34 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d3ozl-0006gX-FP for qemu-devel@nongnu.org; Thu, 27 Apr 2017 15:22:33 -0400 Received: from mx1.redhat.com ([209.132.183.28]:38552) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1d3ozl-0006g7-8s for qemu-devel@nongnu.org; Thu, 27 Apr 2017 15:22:29 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 45D817E9DC; Thu, 27 Apr 2017 19:22:28 +0000 (UTC) Received: from red.redhat.com (ovpn-123-177.rdu2.redhat.com [10.10.123.177]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9D648785C1; Thu, 27 Apr 2017 19:22:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 45D817E9DC Authentication-Results: ext-mx02.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx02.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=eblake@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 45D817E9DC From: Eric Blake To: qemu-devel@nongnu.org Date: Thu, 27 Apr 2017 14:22:08 -0500 Message-Id: <20170427192211.30640-2-eblake@redhat.com> In-Reply-To: <20170427192211.30640-1-eblake@redhat.com> References: <20170427192211.30640-1-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Thu, 27 Apr 2017 19:22:28 +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 v3 1/4] shutdown: Simplify shutdown_signal 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: Paolo Bonzini , armbru@redhat.com, alistair.francis@xilinx.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" There is no signal 0 (kill(pid, 0) has special semantics to probe whether a process is alive), rather than actually sending a signal 0). So we can use the simpler 0, instead of -1, for our sentinel of whether a shutdown request due to a signal has happened. Suggested-by: Markus Armbruster Signed-off-by: Eric Blake --- v3: new patch --- vl.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/vl.c b/vl.c index f46e070..879786a 100644 --- a/vl.c +++ b/vl.c @@ -1598,7 +1598,7 @@ void vm_state_notify(int running, RunState state) } static int reset_requested; -static int shutdown_requested, shutdown_signal =3D -1; +static int shutdown_requested, shutdown_signal; static pid_t shutdown_pid; static int powerdown_requested; static int debug_requested; @@ -1629,7 +1629,7 @@ static int qemu_shutdown_requested(void) static void qemu_kill_report(void) { - if (!qtest_driver() && shutdown_signal !=3D -1) { + if (!qtest_driver() && shutdown_signal) { if (shutdown_pid =3D=3D 0) { /* This happens for eg ^C at the terminal, so it's worth * avoiding printing an odd message in that case. @@ -1643,7 +1643,7 @@ static void qemu_kill_report(void) shutdown_cmd ? shutdown_cmd : ""= ); g_free(shutdown_cmd); } - shutdown_signal =3D -1; + shutdown_signal =3D 0; } } --=20 2.9.3