From patchwork Wed Mar 8 22:49:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Xu X-Patchwork-Id: 1754359 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=dxuuu.xyz header.i=@dxuuu.xyz header.a=rsa-sha256 header.s=fm3 header.b=mWand3FI; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=messagingengine.com header.i=@messagingengine.com header.a=rsa-sha256 header.s=fm1 header.b=Gw5g/IZ/; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4PX6w968Wkz246y for ; Thu, 9 Mar 2023 09:50:17 +1100 (AEDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pa2bp-0001P7-6x; Wed, 08 Mar 2023 17:50:09 -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 1pa2bn-0001MH-Q2 for qemu-devel@nongnu.org; Wed, 08 Mar 2023 17:50:07 -0500 Received: from out2-smtp.messagingengine.com ([66.111.4.26]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pa2bm-00084S-1q for qemu-devel@nongnu.org; Wed, 08 Mar 2023 17:50:07 -0500 Received: from compute5.internal (compute5.nyi.internal [10.202.2.45]) by mailout.nyi.internal (Postfix) with ESMTP id 967C65C0194; Wed, 8 Mar 2023 17:50:05 -0500 (EST) Received: from mailfrontend2 ([10.202.2.163]) by compute5.internal (MEProxy); Wed, 08 Mar 2023 17:50:05 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dxuuu.xyz; h=cc :cc:content-transfer-encoding:content-type:date:date:from:from :in-reply-to:in-reply-to:message-id:mime-version:references :reply-to:sender:subject:subject:to:to; s=fm3; t=1678315805; x= 1678402205; bh=yoW8IBadWWrC4GNpMhxwRyCIfIwhj0PWxXVer2KZ6uU=; b=m Wand3FIZ05cFibGZhnFTqIO02Z6Urokeh7sXNI3aJGyyiQYBm2knBfRBMUULdZ7u LgSvVsJJL7yXx7oQHy/I3F9wEZu8ljZ6a396arh2jOj1Yzpt423NZc1y/cPWm7OL GI6eQNZgVszAWV/RLaUlVC1yPTXcC3ooCMBShb9V3oXzTTeyehyxE7zpls6jeQLB 0T5nHNgNMzDTqGdjp+a+NDMjS1CGMR6jCp0qmT+RRPitTTlLL2Dxf3eVqqVKSFYG irqKcLUzMiQA/Xaay0WUwXZGN6pCzEHBYHVUdcqSovA73EfG2m7c4qKldTUtap4d Dg5S8xWgg+Wbmx3piwkfQ== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-transfer-encoding :content-type:date:date:feedback-id:feedback-id:from:from :in-reply-to:in-reply-to:message-id:mime-version:references :reply-to:sender:subject:subject:to:to:x-me-proxy:x-me-proxy :x-me-sender:x-me-sender:x-sasl-enc; s=fm1; t=1678315805; x= 1678402205; bh=yoW8IBadWWrC4GNpMhxwRyCIfIwhj0PWxXVer2KZ6uU=; b=G w5g/IZ/CBv2bfYUmiC4L+rLHFeCzM9MSwLRDvx7DymkPdp3Ixt3HdOIjNvpsReUa a7JJibt5lVGO2S41OSIGhucYdsY/K3MMmbinezwIAJmcXYYawK4NRHxEceoak+ka rpXRthYSnvnamIwIAN4zth7k3ME0UX70WYpdzFTwMLdIcA6EhK2Ai7iirKK9uDKY gCisHay+B+OYBJu90MUwI15Bx7E8NWMYp3SzJYDvimP9b0wyz41JktGaX7wf0gH7 uMF8GxWPPOuzkSLSHEL3BC+SEyAZrNTiMKKPDwqIoNMTGJ/h2GFH1QKILWmOceQL 6CKluuyzfjB+XdQeqdN0Q== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvhedrvddugecutefuodetggdotefrodftvfcurf hrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecuuegr ihhlohhuthemuceftddtnecufghrlhcuvffnffculdejtddmnecujfgurhephffvvefuff fkofgjfhgggfestdekredtredttdenucfhrhhomhepffgrnhhivghlucgiuhcuoegugihu segugihuuhhurdighiiiqeenucggtffrrghtthgvrhhnpefgfefggeejhfduieekvdeute ffleeifeeuvdfhheejleejjeekgfffgefhtddtteenucevlhhushhtvghrufhiiigvpedt necurfgrrhgrmhepmhgrihhlfhhrohhmpegugihusegugihuuhhurdighiii X-ME-Proxy: Feedback-ID: i6a694271:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Wed, 8 Mar 2023 17:50:04 -0500 (EST) From: Daniel Xu To: kkostiuk@redhat.com, michael.roth@amd.com, marcandre.lureau@gmail.com, berrange@redhat.com Cc: qemu-devel@nongnu.org Subject: [PATCH v4 2/3] qga: Add `all-merge` variant to GuestExecCaptureOutputMode Date: Wed, 8 Mar 2023 15:49:40 -0700 Message-Id: X-Mailer: git-send-email 2.39.1 In-Reply-To: References: MIME-Version: 1.0 Received-SPF: pass client-ip=66.111.4.26; envelope-from=dxu@dxuuu.xyz; helo=out2-smtp.messagingengine.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, 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_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_PASS=-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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Currently, any captured output (via `capture-output`) is segregated into separate GuestExecStatus fields (`out-data` and `err-data`). This means that downstream consumers have no way to reassemble the captured data back into the original stream. This is relevant for chatty and semi-interactive (ie. read only) CLI tools. Such tools may deliberately interleave stdout and stderr for visual effect. If segregated, the output becomes harder to visually understand. This commit adds a new enum variant to the GuestExecCaptureOutputMode qapi to merge the output streams such that consumers can have a pristine view of the original command output. Signed-off-by: Daniel Xu --- qga/commands.c | 31 +++++++++++++++++++++++++++++-- qga/qapi-schema.json | 4 +++- 2 files changed, 32 insertions(+), 3 deletions(-) diff --git a/qga/commands.c b/qga/commands.c index 5504fc5b8c..7d458d0aca 100644 --- a/qga/commands.c +++ b/qga/commands.c @@ -270,12 +270,26 @@ static void guest_exec_child_watch(GPid pid, gint status, gpointer data) g_spawn_close_pid(pid); } -/** Reset ignored signals back to default. */ static void guest_exec_task_setup(gpointer data) { #if !defined(G_OS_WIN32) + bool has_merge = *(bool *)data; struct sigaction sigact; + if (has_merge) { + /* + * FIXME: When `GLIB_VERSION_MIN_REQUIRED` is bumped to 2.58+, use + * g_spawn_async_with_fds() to be portable on windows. The current + * logic does not work on windows b/c `GSpawnChildSetupFunc` is run + * inside the parent, not the child. + */ + if (dup2(STDOUT_FILENO, STDERR_FILENO) != 0) { + slog("dup2() failed to merge stderr into stdout: %s", + strerror(errno)); + } + } + + /* Reset ignored signals back to default. */ memset(&sigact, 0, sizeof(struct sigaction)); sigact.sa_handler = SIG_DFL; @@ -409,6 +423,7 @@ GuestExec *qmp_guest_exec(const char *path, GIOChannel *in_ch, *out_ch, *err_ch; GSpawnFlags flags; bool has_output = false; + bool has_merge = false; GuestExecCaptureOutputMode output_mode; g_autofree uint8_t *input = NULL; size_t ninput = 0; @@ -445,13 +460,25 @@ GuestExec *qmp_guest_exec(const char *path, case GUEST_EXEC_CAPTURE_OUTPUT_MODE_ALL: has_output = true; break; + case GUEST_EXEC_CAPTURE_OUTPUT_MODE_ALL_MERGE: + has_output = true; + has_merge = true; + break; case GUEST_EXEC_CAPTURE_OUTPUT_MODE__MAX: /* Silence warning; impossible branch */ break; } +#if defined(G_OS_WIN32) + /* FIXME: see comment in guest_exec_task_setup() */ + if (has_merge) { + error_setg(errp, "all-merge unsupported on windows"); + return NULL; + } +#endif + ret = g_spawn_async_with_pipes(NULL, argv, envp, flags, - guest_exec_task_setup, NULL, &pid, input_data ? &in_fd : NULL, + guest_exec_task_setup, &has_merge, &pid, input_data ? &in_fd : NULL, has_output ? &out_fd : NULL, has_output ? &err_fd : NULL, &gerr); if (!ret) { error_setg(errp, QERR_QGA_COMMAND_FAILED, gerr->message); diff --git a/qga/qapi-schema.json b/qga/qapi-schema.json index 4ef585da5d..d364ab78de 100644 --- a/qga/qapi-schema.json +++ b/qga/qapi-schema.json @@ -1209,11 +1209,13 @@ # @stdout: only capture stdout # @stderr: only capture stderr # @all: capture both stdout and stderr +# @all-merge: capture both stdout and stderr and merge together +# into stdout. not effective on windows guests. # # Since: 8.0 ## { 'enum': 'GuestExecCaptureOutputMode', - 'data': [ 'none', 'stdout', 'stderr', 'all' ] } + 'data': [ 'none', 'stdout', 'stderr', 'all', 'all-merge' ] } ## # @GuestExecCaptureOutput: