From nobody Mon Feb 9 08:56:54 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; 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; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1645654485363482.4717314171304; Wed, 23 Feb 2022 14:14:45 -0800 (PST) Received: from localhost ([::1]:37870 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nMzuG-0000iL-1T for importer@patchew.org; Wed, 23 Feb 2022 17:14:44 -0500 Received: from eggs.gnu.org ([209.51.188.92]:54828) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nMzp6-0000ul-39 for qemu-devel@nongnu.org; Wed, 23 Feb 2022 17:09:24 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:36305) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nMzp1-0005re-BX for qemu-devel@nongnu.org; Wed, 23 Feb 2022 17:09:23 -0500 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-408-zvQ4cMCtOFGxx82TbaMqdw-1; Wed, 23 Feb 2022 17:09:15 -0500 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 mimecast-mx01.redhat.com (Postfix) with ESMTPS id 4CB25FC82; Wed, 23 Feb 2022 22:09:14 +0000 (UTC) Received: from scv.redhat.com (unknown [10.22.16.166]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5613F709E6; Wed, 23 Feb 2022 22:09:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1645654158; 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=9lizLbjnleLuPHba0e+r2oWDlL2Oo93AzdEmVEKdjiY=; b=YNiJx2vC1+Vi5uJ4mVoF+Lvj0syAsDeKTxFyAOHUDlXSL/gy4SbWaYnqLle6WwwJAJgdeh qTTZ/J0WGdQTsjgKUZIFExDw/nQ+BpBcAKjj9pdZZz7peBfNUx7kuFp9dVTOFuic+isyt1 X+s1YR+LwV1meZJegHq8BsPAN8sj1vs= X-MC-Unique: zvQ4cMCtOFGxx82TbaMqdw-1 From: John Snow To: qemu-devel@nongnu.org Subject: [PULL 1/6] python: introduce qmp-shell-wrap convenience tool Date: Wed, 23 Feb 2022 17:08:55 -0500 Message-Id: <20220223220900.2226630-2-jsnow@redhat.com> In-Reply-To: <20220223220900.2226630-1-jsnow@redhat.com> References: <20220223220900.2226630-1-jsnow@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jsnow@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" 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=170.10.133.124; envelope-from=jsnow@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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: , Cc: Kevin Wolf , Peter Maydell , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Beraldo Leal , qemu-block@nongnu.org, Markus Armbruster , Eduardo Habkost , Hanna Reitz , Cleber Rosa , John Snow Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1645654487243100003 From: Daniel P. Berrang=C3=A9 With the current 'qmp-shell' tool developers must first spawn QEMU with a suitable -qmp arg and then spawn qmp-shell in a separate terminal pointing to the right socket. With 'qmp-shell-wrap' developers can ignore QMP sockets entirely and just pass the QEMU command and arguments they want. The program will listen on a UNIX socket and tell QEMU to connect QMP to that. For example, this: # qmp-shell-wrap -- qemu-system-x86_64 -display none Is roughly equivalent of running: # qemu-system-x86_64 -display none -qmp qmp-shell-1234 & # qmp-shell qmp-shell-1234 Except that 'qmp-shell-wrap' switches the socket peers around so that it is the UNIX socket server and QEMU is the socket client. This makes QEMU reliably go away when qmp-shell-wrap exits, closing the server socket. Signed-off-by: Daniel P. Berrang=C3=A9 Message-id: 20220128161157.36261-2-berrange@redhat.com [Edited for rebase. --js] Signed-off-by: John Snow --- python/qemu/aqmp/qmp_shell.py | 65 ++++++++++++++++++++++++++++++++--- python/setup.cfg | 1 + scripts/qmp/qmp-shell-wrap | 11 ++++++ 3 files changed, 73 insertions(+), 4 deletions(-) create mode 100755 scripts/qmp/qmp-shell-wrap diff --git a/python/qemu/aqmp/qmp_shell.py b/python/qemu/aqmp/qmp_shell.py index d11bf54b00..c60df787fc 100644 --- a/python/qemu/aqmp/qmp_shell.py +++ b/python/qemu/aqmp/qmp_shell.py @@ -86,6 +86,7 @@ import os import re import readline +from subprocess import Popen import sys from typing import ( Iterator, @@ -167,8 +168,10 @@ class QMPShell(QEMUMonitorProtocol): :param verbose: Echo outgoing QMP messages to console. """ def __init__(self, address: SocketAddrT, - pretty: bool =3D False, verbose: bool =3D False): - super().__init__(address) + pretty: bool =3D False, + verbose: bool =3D False, + server: bool =3D False): + super().__init__(address, server=3Dserver) self._greeting: Optional[QMPMessage] =3D None self._completer =3D QMPCompleter() self._transmode =3D False @@ -409,8 +412,10 @@ class HMPShell(QMPShell): :param verbose: Echo outgoing QMP messages to console. """ def __init__(self, address: SocketAddrT, - pretty: bool =3D False, verbose: bool =3D False): - super().__init__(address, pretty, verbose) + pretty: bool =3D False, + verbose: bool =3D False, + server: bool =3D False): + super().__init__(address, pretty, verbose, server) self._cpu_index =3D 0 =20 def _cmd_completion(self) -> None: @@ -533,5 +538,57 @@ def main() -> None: pass =20 =20 +def main_wrap() -> None: + """ + qmp-shell-wrap entry point: parse command line arguments and + start the REPL. + """ + parser =3D argparse.ArgumentParser() + parser.add_argument('-H', '--hmp', action=3D'store_true', + help=3D'Use HMP interface') + parser.add_argument('-v', '--verbose', action=3D'store_true', + help=3D'Verbose (echo commands sent and received)') + parser.add_argument('-p', '--pretty', action=3D'store_true', + help=3D'Pretty-print JSON') + + parser.add_argument('command', nargs=3Dargparse.REMAINDER, + help=3D'QEMU command line to invoke') + + args =3D parser.parse_args() + + cmd =3D args.command + if len(cmd) !=3D 0 and cmd[0] =3D=3D '--': + cmd =3D cmd[1:] + if len(cmd) =3D=3D 0: + cmd =3D ["qemu-system-x86_64"] + + sockpath =3D "qmp-shell-wrap-%d" % os.getpid() + cmd +=3D ["-qmp", "unix:%s" % sockpath] + + shell_class =3D HMPShell if args.hmp else QMPShell + + try: + address =3D shell_class.parse_address(sockpath) + except QMPBadPortError: + parser.error(f"Bad port number: {sockpath}") + return # pycharm doesn't know error() is noreturn + + try: + with shell_class(address, args.pretty, args.verbose, True) as qemu: + with Popen(cmd): + + try: + qemu.accept() + except ConnectError as err: + if isinstance(err.exc, OSError): + die(f"Couldn't connect to {args.qmp_server}: {err!= s}") + die(str(err)) + + for _ in qemu.repl(): + pass + finally: + os.unlink(sockpath) + + if __name__ =3D=3D '__main__': main() diff --git a/python/setup.cfg b/python/setup.cfg index 18aea2bab3..0959603238 100644 --- a/python/setup.cfg +++ b/python/setup.cfg @@ -68,6 +68,7 @@ console_scripts =3D qom-fuse =3D qemu.utils.qom_fuse:QOMFuse.entry_point [fuse] qemu-ga-client =3D qemu.utils.qemu_ga_client:main qmp-shell =3D qemu.aqmp.qmp_shell:main + qmp-shell-wrap =3D qemu.aqmp.qmp_shell:main_wrap aqmp-tui =3D qemu.aqmp.aqmp_tui:main [tui] =20 [flake8] diff --git a/scripts/qmp/qmp-shell-wrap b/scripts/qmp/qmp-shell-wrap new file mode 100755 index 0000000000..9e94da114f --- /dev/null +++ b/scripts/qmp/qmp-shell-wrap @@ -0,0 +1,11 @@ +#!/usr/bin/env python3 + +import os +import sys + +sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'pytho= n')) +from qemu.qmp import qmp_shell + + +if __name__ =3D=3D '__main__': + qmp_shell.main_wrap() --=20 2.34.1