From nobody Mon Feb 9 14:24:02 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 176597762385871.00981194321844; Wed, 17 Dec 2025 05:20:23 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vVrRF-00047p-Ub; Wed, 17 Dec 2025 08:19:34 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vVrRC-00047b-4Q for qemu-devel@nongnu.org; Wed, 17 Dec 2025 08:19:32 -0500 Received: from isrv.corpit.ru ([212.248.84.144]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vVrR7-0000HN-Qp for qemu-devel@nongnu.org; Wed, 17 Dec 2025 08:19:29 -0500 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id A16B5175C38 for ; Wed, 17 Dec 2025 16:18:58 +0300 (MSK) Received: from think4mjt.tls.msk.ru (mjtthink.wg.tls.msk.ru [192.168.177.146]) by tsrv.corpit.ru (Postfix) with ESMTP id 2FEC9338234; Wed, 17 Dec 2025 16:19:18 +0300 (MSK) From: Michael Tokarev To: qemu-devel@nongnu.org Cc: Michael Tokarev Subject: [PATCH] implement systemd startup notification for qemu-system Date: Wed, 17 Dec 2025 16:19:09 +0300 Message-ID: <20251217131909.3713900-1-mjt@tls.msk.ru> X-Mailer: git-send-email 2.47.3 MIME-Version: 1.0 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=212.248.84.144; envelope-from=mjt@tls.msk.ru; helo=isrv.corpit.ru X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1765977639287158500 Content-Type: text/plain; charset="utf-8" If $NOTIFY_SOCKET environment variable is present and its value starts with / or @ and fits in struct sockaddr_unix, use it to send READY=3D1 message to a session manager like systemd. This allows qemu to be used in a systemd Type=3Dnotify service. Signed-off-by: Michael Tokarev --- os-posix.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/os-posix.c b/os-posix.c index 52925c23d3..ab27252115 100644 --- a/os-posix.c +++ b/os-posix.c @@ -282,6 +282,41 @@ void os_setup_limits(void) } } =20 +static void sd_notify_ready(void) +{ +#ifdef CONFIG_LINUX + static const char message[] =3D "READY=3D1"; + static const char sock_env[] =3D "NOTIFY_SOCKET"; + + struct sockaddr_un sun; + int sock; + const char *sock_path; + + sock_path =3D getenv(sock_env); + if (!sock_path || + (*sock_path !=3D '/' && *sock_path !=3D '@') || + strlen(sock_path) >=3D sizeof(sun.sun_path)) { + return; + } + + memset(&sun, 0, sizeof(sun)); + sun.sun_family =3D AF_UNIX; + strcpy(sun.sun_path, sock_path); + if (*sock_path =3D=3D '@') { + sun.sun_path[0] =3D '\0'; + } + + sock =3D socket(AF_UNIX, SOCK_DGRAM, 0); + if (sock >=3D 0) { + /* ignore errors */ + sendto(sock, message, sizeof(message) - 1, 0, + (struct sockaddr *)&sun, sizeof(sun)); + close(sock); + } + unsetenv(sock_env); +#endif +} + void os_setup_post(void) { int fd =3D 0; @@ -297,6 +332,7 @@ void os_setup_post(void) } } =20 + sd_notify_ready(); change_root(); change_process_uid(); =20 --=20 2.47.3