From patchwork Tue Jan 7 14:52:06 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Michal Privoznik X-Patchwork-Id: 13929114 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9785AC3DA4A for ; Tue, 7 Jan 2025 14:53:01 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1tVAwY-0003Gz-TS; Tue, 07 Jan 2025 09:52:30 -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 1tVAwU-0003FX-56 for qemu-devel@nongnu.org; Tue, 07 Jan 2025 09:52:27 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tVAwP-0007jl-WC for qemu-devel@nongnu.org; Tue, 07 Jan 2025 09:52:25 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1736261540; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=v7fSVaL4A+NJUb5Qfu7/DO8n7m7CrRilZSxiNE2PvZg=; b=BTgicFREg16BzDMoP6TaXhVyA4LvQwIJTj5dReMWIhuWse29WZW1WfVchwr7FgYnz/yuvh 6FyC9T+pi9J+ws/G6g2hiV3MyelOA8o9eLsJv9se2GLFxb+KpIJYBtrb7V7AfxQwWmNDbn w1JDgMOzGM4jbVnBi0LZJ0vORVh2KmU= Received: from mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-617-hUNVRimPPoyZSnLzrYbekg-1; Tue, 07 Jan 2025 09:52:18 -0500 X-MC-Unique: hUNVRimPPoyZSnLzrYbekg-1 X-Mimecast-MFC-AGG-ID: hUNVRimPPoyZSnLzrYbekg Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 12E08195609E; Tue, 7 Jan 2025 14:52:17 +0000 (UTC) Received: from moe.brq.redhat.com (unknown [10.43.3.236]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 981173000197; Tue, 7 Jan 2025 14:52:15 +0000 (UTC) From: Michal Privoznik To: qemu-devel@nongnu.org Cc: kkostiuk@redhat.com, michael.roth@amd.com, jtomko@redhat.com Subject: [PATCH v3 1/2] qga: Invert logic on return value in main() Date: Tue, 7 Jan 2025 15:52:06 +0100 Message-ID: <8a28265f50177a8dc4c10fcf4146e85a7fd748ee.1736261360.git.mprivozn@redhat.com> In-Reply-To: References: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Received-SPF: pass client-ip=170.10.129.124; envelope-from=mprivozn@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -24 X-Spam_score: -2.5 X-Spam_bar: -- X-Spam_report: (-2.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.437, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Current logic on return value ('ret' variable) in main() is error prone. The variable is initialized to EXIT_SUCCESS and then set to EXIT_FAILURE on error paths. This makes it very easy to forget to set the variable to indicate error when adding new error path, as is demonstrated by handling of initialize_agent() failure. It's simply lacking setting of the variable. There's just one case where success should be indicated: when dumping the config ('-D' cmd line argument). To resolve this, initialize the variable to failure value and set it explicitly to success value in that one specific case. Signed-off-by: Michal Privoznik Reviewed-by: Ján Tomko --- qga/main.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/qga/main.c b/qga/main.c index 4a695235f0..68ea7f275a 100644 --- a/qga/main.c +++ b/qga/main.c @@ -1579,7 +1579,7 @@ static void stop_agent(GAState *s, bool requested) int main(int argc, char **argv) { - int ret = EXIT_SUCCESS; + int ret = EXIT_FAILURE; GAState *s; GAConfig *config = g_new0(GAConfig, 1); int socket_activation; @@ -1607,7 +1607,6 @@ int main(int argc, char **argv) socket_activation = check_socket_activation(); if (socket_activation > 1) { g_critical("qemu-ga only supports listening on one socket"); - ret = EXIT_FAILURE; goto end; } if (socket_activation) { @@ -1631,7 +1630,6 @@ int main(int argc, char **argv) if (!config->method) { g_critical("unsupported listen fd type"); - ret = EXIT_FAILURE; goto end; } } else if (config->channel_path == NULL) { @@ -1643,13 +1641,13 @@ int main(int argc, char **argv) config->channel_path = g_strdup(QGA_SERIAL_PATH_DEFAULT); } else { g_critical("must specify a path for this channel"); - ret = EXIT_FAILURE; goto end; } } if (config->dumpconf) { config_dump(config); + ret = EXIT_SUCCESS; goto end; } @@ -1664,6 +1662,7 @@ int main(int argc, char **argv) SERVICE_TABLE_ENTRY service_table[] = { { (char *)QGA_SERVICE_NAME, service_main }, { NULL, NULL } }; StartServiceCtrlDispatcher(service_table); + ret = EXIT_SUCCESS; } else { ret = run_agent(s); }