From nobody Mon May 25 13:48:48 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; 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=pass(p=none dis=none) header.from=163.com ARC-Seal: i=1; a=rsa-sha256; t=1777121540; cv=none; d=zohomail.com; s=zohoarc; b=byiPaRaUu9xuD0DXaoTwt9CluEhrWwDvIL5pRaC4MWeu8HYr1rIGA5cU8++bAP96+gVSQaJFBwtBuWOsLsq6irSjOdiJGIxX7Ane5Xt1UyWu3RWqwfPpwlmJjSdfUpoybxS1Qab/eefm+TgYyL0waSq2ymBjgSTaXEUx9XpUJC8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1777121540; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=qA35ELgLfV3WQ47A+J7U+2Qbpuj2MRAZs59pEpnwF6A=; b=Qu2CTomeMQJTADKPwL3EJWdkU/eunEu0rDgDyyHgrHBZy0QVMdXzg7hyS+nRUWc6vwePevhmJyGC8Ke0zlDztfiWz4/tkwIP4DbXC6pwg/6jLAcEsim1Ma0aLQ83hMISbkgubkO1m4RT30XfaOZfAsrsWl5MAPjALJuROn1V274= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; 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=pass header.from= (p=none dis=none) Return-Path: Received: from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1777121540945131.1755260491144; Sat, 25 Apr 2026 05:52:20 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1wGcU1-0006ag-4B; Sat, 25 Apr 2026 08:51:41 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wGcTx-0006aI-2O for qemu-devel@nongnu.org; Sat, 25 Apr 2026 08:51:38 -0400 Received: from m16.mail.163.com ([220.197.31.3]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wGcTs-0001Ad-3N for qemu-devel@nongnu.org; Sat, 25 Apr 2026 08:51:36 -0400 Received: from alano.. (unknown []) by gzga-smtp-mtada-g1-3 (Coremail) with SMTP id _____wDXP0XEuOxp+Fm4Bg--.64504S3; Sat, 25 Apr 2026 20:51:21 +0800 (CST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=qA 35ELgLfV3WQ47A+J7U+2Qbpuj2MRAZs59pEpnwF6A=; b=C8dPDT1y5wCh54Zf12 J7Sqis90W25vS6HPCDUMesDLZfz4ikAlK0/w43zORrcNf7en5ZDLkNnOVIeWKNv8 S2AqibydVLp/X3+8LJhZNBQOcrEBSs2FSZDLLkvJZ2gIPiwHt4XOsSm99jsmAgGi eP06Pc31Mx3qb+8g46v2lF/n0= From: AlanoSong@163.com To: qemu-devel@nongnu.org Cc: dave@treblig.org, pbonzini@redhat.com, Alano Song Subject: [PATCH v2 1/1] monitor: Add `clear` command Date: Sat, 25 Apr 2026 20:51:13 +0800 Message-ID: <20260425125113.37341-2-AlanoSong@163.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260425125113.37341-1-AlanoSong@163.com> References: <20260425125113.37341-1-AlanoSong@163.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: _____wDXP0XEuOxp+Fm4Bg--.64504S3 X-Coremail-Antispam: 1Uf129KBjvJXoW7CFy8KFyfKrWUuw4rWr4xtFb_yoW8tF43pr Z5trWrK3y8J3Wxur1xAr9xWF15KrZ7uFZFkF9xAF98AF98Jw1Iva1kKr1qk3ZxXrWxKFyS vFy2qrWDGasFqr7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x0pRxbbNUUUUU= X-Originating-IP: [240e:36f:15cf:8780:308a:f2b4:e0e:95c7] X-CM-SenderInfo: xdod00pvrqwqqrwthudrp/xtbC9gn1CmnsuMmmhwAA3V 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=lists1p.gnu.org; Received-SPF: pass client-ip=220.197.31.3; envelope-from=alanosong@163.com; helo=m16.mail.163.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, UNPARSEABLE_RELAY=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: qemu development 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-ZohoMail-DKIM: pass (identity @163.com) X-ZM-MESSAGEID: 1777121546166154100 Content-Type: text/plain; charset="utf-8" The monitor screen can be cluttered after executing commands like `info qtree`. It is useful to have a command to clear current screen, just like linux `clear` command do. This patch has been tested under monitors using stdio, vc, tcp socket, unix socket and serial interfaces. Signed-off-by: Alano Song Reviewed-by: Dr. David Alan Gilbert --- hmp-commands.hx | 14 ++++++++++++++ include/monitor/hmp.h | 1 + monitor/hmp-cmds.c | 11 +++++++++++ 3 files changed, 26 insertions(+) diff --git a/hmp-commands.hx b/hmp-commands.hx index 5cc4788f12..95f9166732 100644 --- a/hmp-commands.hx +++ b/hmp-commands.hx @@ -20,6 +20,20 @@ SRST Show the help for all commands or just for command *cmd*. ERST =20 + { + .name =3D "clear", + .args_type =3D "", + .params =3D "", + .help =3D "clear the monitor screen", + .cmd =3D hmp_clear, + .flags =3D "p", + }, + +SRST +``clear`` + Clear the monitor screen. +ERST + { .name =3D "commit", .args_type =3D "device:B", diff --git a/include/monitor/hmp.h b/include/monitor/hmp.h index e222bea60c..9b66458d21 100644 --- a/include/monitor/hmp.h +++ b/include/monitor/hmp.h @@ -165,6 +165,7 @@ void hmp_trace_event(Monitor *mon, const QDict *qdict); void hmp_trace_file(Monitor *mon, const QDict *qdict); void hmp_info_trace_events(Monitor *mon, const QDict *qdict); void hmp_help(Monitor *mon, const QDict *qdict); +void hmp_clear(Monitor *mon, const QDict *qdict); void hmp_info_help(Monitor *mon, const QDict *qdict); void hmp_info_sync_profile(Monitor *mon, const QDict *qdict); void hmp_info_history(Monitor *mon, const QDict *qdict); diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c index bc26b39d70..608a208c6e 100644 --- a/monitor/hmp-cmds.c +++ b/monitor/hmp-cmds.c @@ -218,6 +218,17 @@ void hmp_help(Monitor *mon, const QDict *qdict) hmp_help_cmd(mon, qdict_get_try_str(qdict, "name")); } =20 +void hmp_clear(Monitor *mon, const QDict *qdict) +{ + /* + * Send an ANSI escape sequence: + * "\x1b[H" - move cursor to top-left + * "\x1b[2J" - clear visible screen + * "\x1b[3J" - clear scrollback + */ + monitor_printf(mon, "\x1b[H\x1b[2J\x1b[3J"); +} + void hmp_info_help(Monitor *mon, const QDict *qdict) { hmp_help_cmd(mon, "info"); --=20 2.43.0