From patchwork Mon May 16 13:11:37 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Richard W.M. Jones" X-Patchwork-Id: 622577 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3r7gpw5S4Zz9t87 for ; Mon, 16 May 2016 23:12:08 +1000 (AEST) Received: from localhost ([::1]:43807 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b2IJa-00062H-GA for incoming@patchwork.ozlabs.org; Mon, 16 May 2016 09:12:06 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53578) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b2IJE-0005U4-MS for qemu-devel@nongnu.org; Mon, 16 May 2016 09:11:45 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1b2IJB-00013T-CK for qemu-devel@nongnu.org; Mon, 16 May 2016 09:11:44 -0400 Received: from mx1.redhat.com ([209.132.183.28]:55673) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b2IJB-00013J-6r for qemu-devel@nongnu.org; Mon, 16 May 2016 09:11:41 -0400 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 64BE68553D for ; Mon, 16 May 2016 13:11:40 +0000 (UTC) Received: from moo.home.annexia.org (ovpn-204-25.brq.redhat.com [10.40.204.25]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u4GDBcZQ002924; Mon, 16 May 2016 09:11:39 -0400 From: "Richard W.M. Jones" To: pbonzini@redhat.com Date: Mon, 16 May 2016 14:11:37 +0100 Message-Id: <1463404297-13094-1-git-send-email-rjones@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Mon, 16 May 2016 13:11:40 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH] vl.c: Add -L ? (or -L help) which lists data dirs. 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: qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" QEMU compiles a list of data directories from various sources. When consuming a QEMU binary it's useful to be able to get this list of data directories: a primary reason is so you can list what BIOSes or keymaps ship with this version of QEMU. However without reproducing the method that QEMU uses internally, it's not possible to get the list of data directories. This commit adds a simple -L "?" (alternately -L help) that just lists out the data directories as qemu calculates them: $ ./x86_64-softmmu/qemu-system-x86_64 -L help /home/rjones/d/qemu/pc-bios /usr/local/share/qemu $ ./x86_64-softmmu/qemu-system-x86_64 -L /tmp -L \? /tmp /home/rjones/d/qemu/pc-bios /usr/local/share/qemu Signed-off-by: Richard W.M. Jones --- qemu-options.hx | 2 ++ vl.c | 13 ++++++++++++- 2 files changed, 14 insertions(+), 1 deletion(-) diff --git a/qemu-options.hx b/qemu-options.hx index 6106520..49b73d4 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -3199,6 +3199,8 @@ STEXI @item -L @var{path} @findex -L Set the directory for the BIOS, VGA BIOS and keymaps. + +To list all the data directories, use @code{-L ?} or @code{-L help}. ETEXI DEF("bios", HAS_ARG, QEMU_OPTION_bios, \ diff --git a/vl.c b/vl.c index 5fd22cb..597cb00 100644 --- a/vl.c +++ b/vl.c @@ -2990,6 +2990,7 @@ int main(int argc, char **argv, char **envp) FILE *vmstate_dump_file = NULL; Error *main_loop_err = NULL; Error *err = NULL; + bool list_data_dirs = 0; qemu_init_cpu_loop(); qemu_mutex_lock_iothread(); @@ -3371,7 +3372,9 @@ int main(int argc, char **argv, char **envp) add_device_config(DEV_GDB, optarg); break; case QEMU_OPTION_L: - if (data_dir_idx < ARRAY_SIZE(data_dir)) { + if (is_help_option(optarg)) { + list_data_dirs = 1; + } else if (data_dir_idx < ARRAY_SIZE(data_dir)) { data_dir[data_dir_idx++] = optarg; } break; @@ -4128,6 +4131,14 @@ int main(int argc, char **argv, char **envp) data_dir[data_dir_idx++] = CONFIG_QEMU_DATADIR; } + /* -L ? lists the data directories and exits. */ + if (list_data_dirs) { + for (i = 0; i < data_dir_idx; i++) { + printf("%s\n", data_dir[i]); + } + exit(0); + } + smp_parse(qemu_opts_find(qemu_find_opts("smp-opts"), NULL)); machine_class->max_cpus = machine_class->max_cpus ?: 1; /* Default to UP */