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[185.47.220.165]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48af502cf08sm5948283f8f.9.2026.09.29.09.40.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Sep 2026 09:40:34 -0700 (PDT) From: Filip Hejsek Date: Tue, 29 Sep 2026 18:38:32 +0200 Subject: [PATCH v8 04/12] char-mux: add support for the terminal size MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Message-Id: <20260929-console-resize-v8-4-2ff9183f8750@gmail.com> References: <20260929-console-resize-v8-0-2ff9183f8750@gmail.com> In-Reply-To: <20260929-console-resize-v8-0-2ff9183f8750@gmail.com> To: qemu-devel@nongnu.org Cc: =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Paolo Bonzini , "Michael S. Tsirkin" , Laurent Vivier , Amit Shah , Markus Armbruster , Eric Blake , Eduardo Habkost , Marcel Apfelbaum , Yanan Wang , Zhao Liu , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , Maximilian Immanuel Brandtner , Dominique Martinet , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Szymon Lukasz X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1790700030; l=1674; i=filip.hejsek@gmail.com; s=20250912; h=from:subject:message-id; bh=XIo18sGrguMXRnYff57wk94laXzZTbeg8upSKiNp6+Q=; b=XXvK5neTkleB8mB1Nm0cQcNd2TflHgUO8uPAU9A22BxbGJCB9dVCYT6VGXd1jmD3jWcW5l49o mzOoStvVyypDTqBMre+qTc7Lix0hZXkgo7uEeAPHtfOs3B3riQt8fZe X-Developer-Key: i=filip.hejsek@gmail.com; a=ed25519; pk=nakB8gEK3oi+Q/5dBTMCy/LgZL47NP60z1jeDR6O/WU= Received-SPF: pass client-ip=2a00:1450:4864:31::10; envelope-from=filip.hejsek@gmail.com; helo=mail-wm2-x10.google.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, 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: qemu development 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 From: Szymon Lukasz The terminal size of a mux chardev should be the same as the real chardev, so listen for CHR_EVENT_RESIZE to be up to date. We forward CHR_EVENT_RESIZE only to the focused frontend. This means frontends should update their view of the terminal size on receiving CHR_EVENT_MUX_IN. Signed-off-by: Szymon Lukasz Reviewed-by: Daniel P. Berrangé Signed-off-by: Filip Hejsek --- chardev/char-mux.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/chardev/char-mux.c b/chardev/char-mux.c index 881443d869..5a90f0221b 100644 --- a/chardev/char-mux.c +++ b/chardev/char-mux.c @@ -264,9 +264,24 @@ void mux_chr_send_all_event(Chardev *chr, QEMUChrEvent event) } } +static void mux_update_winsize(Chardev *chr) +{ + MuxChardev *d = MUX_CHARDEV(chr); + uint16_t cols, rows; + + qemu_chr_fe_get_winsize(&d->chr, &cols, &rows); + qemu_chr_resize(chr, cols, rows); +} + static void mux_chr_event(void *opaque, QEMUChrEvent event) { - mux_chr_send_all_event(CHARDEV(opaque), event); + Chardev *chr = CHARDEV(opaque); + + if (event == CHR_EVENT_RESIZE) { + mux_update_winsize(chr); + } else { + mux_chr_send_all_event(chr, event); + } } static GSource *mux_chr_add_watch(Chardev *s, GIOCondition cond) @@ -378,6 +393,8 @@ static bool mux_chr_open(Chardev *chr, ChardevBackend *backend, Error **errp) return false; } + mux_update_winsize(chr); + /* * Only move to opened state if we've realized * the initial set of muxes: -- 2.55.0