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a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:date:from:in-reply-to:message-id :mime-version:references:subject:to; s=pp1; bh=cS6EkZ0ID1VVa5aIP luUiD/+AuL/jgI+GJo/dc8rhy4=; b=Kf15CyoLmfwukJwHeqfy1oquBLktJt3QL X3oeV2wUaNr5X9Srg/Q7IqfhFkYDBPVPGSifo2K2/EHyIJ+zhe3cIcrYUwzmGTY9 5eB+n6N7jDIObDtqP1ZAwpLdXW61JiOkQXxY+a08rrSkmTSUZtazE0BF5zjEBEhZ 1M7GrC4jc0/amG3cReSw49fDmLnoDQjwN+C0AllAyVM6x2dULIbn0G9DzALCX8dk qxz97DVJkcoZljVX9kjBW/bKzBJyjvx+DpaNNIVAeRB6NMUd19Dpuo4vMLG3qMcL 5NF31vrX3GB77MYiavrjfpZFg4SlO6ybjNOaamgbdRd0ju2i/7KZA== From: Maximilian Immanuel Brandtner To: berrange@redhat.com Cc: amit@kernel.org, armbru@redhat.com, eblake@redhat.com, eduardo@habkost.net, filip.hejsek@gmail.com, lvivier@redhat.com, marcandre.lureau@redhat.com, marcel.apfelbaum@gmail.com, maxbr@linux.ibm.com, mst@redhat.com, noh4hss@gmail.com, pbonzini@redhat.com, philmd@linaro.org, qemu-devel@nongnu.org, wangyanan55@huawei.com, zhao1.liu@intel.com Subject: [PATCH] char-pty: add support for the terminal size Date: Mon, 15 Sep 2025 18:25:35 +0200 Message-ID: <20250915162535.147642-1-maxbr@linux.ibm.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: kbk141anzs8XQXHi6Zqj7Hhror-XTc0D X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwOTE1MDAyOCBTYWx0ZWRfX8bd3sIxWTVi5 UnuYyCtx+VZq8HIp0Rk+DInpQIBt1Cd+UhG5XfzrsCLkDsuxBiKp+U29A1ThVCACc7ku/oA6azO 7RKGgVGtsPwlCvuEUzKA3NG2HbPyoS0E2Vmv/N2glrGrZkdqCbhQGICnHesi8fhMz4WfECMin/q EY8COnLNLwkatv9vBK7HDStyoU2EThQJYB0DV4CwDH70hmn6VSXsD6x/JXrKg9sUdA1MzJORHU5 rX64Cns282CnlgtCahu1BbxoKBvMmuPFjhGmqX2YY0/DJaSIDvSXqlbiGwbAgWxmVswsC/guSQ3 +Rt45Eam1KknfkIBpkrZodiCNqmhrU9ya3tuoEXcOt3YZzQIIfAzq4+cLF19flHzHk5G9wSKjmR pufuZoMN X-Authority-Analysis: v=2.4 cv=HecUTjE8 c=1 sm=1 tr=0 ts=68c83e0a cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=yJojWOMRYYMA:10 a=VnNF1IyMAAAA:8 a=GfxKoImt5xJX7E72Q28A:9 X-Proofpoint-GUID: 7KXbZ_87q3VgVme4eejIgBNgoQjKHBB3 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1117,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-09-15_06,2025-09-12_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 adultscore=0 spamscore=0 priorityscore=1501 suspectscore=0 malwarescore=0 bulkscore=0 impostorscore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2509150028 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=148.163.156.1; envelope-from=maxbr@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_PASS=-0.001, T_SPF_HELO_TEMPERROR=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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1757953740091116600 Content-Type: text/plain; charset="utf-8" Update the terminal size upon SIGWINCH delivery. To be committed with the patch-set: [PATCH v4 00/10] virtio-console: notify= about the terminal size Signed-off-by: Maximilian Immanuel Brandtner --- chardev/char-pty.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/chardev/char-pty.c b/chardev/char-pty.c index 674e9b3f14..802bae9037 100644 --- a/chardev/char-pty.c +++ b/chardev/char-pty.c @@ -28,6 +28,7 @@ #include "io/channel-file.h" #include "qemu/sockets.h" #include "qemu/error-report.h" +#include "qemu/main-loop.h" #include "qemu/module.h" #include "qemu/option.h" #include "qemu/qemu-print.h" @@ -35,6 +36,8 @@ #include "chardev/char-io.h" #include "qom/object.h" =20 +#include + struct PtyChardev { Chardev parent; QIOChannel *ioc; @@ -43,6 +46,8 @@ struct PtyChardev { int connected; GSource *timer_src; char *path; + + Notifier resize_notifier; }; typedef struct PtyChardev PtyChardev; =20 @@ -85,6 +90,15 @@ static void pty_chr_rearm_timer(Chardev *chr, int ms) g_free(name); } =20 +static void pty_chr_resize(PtyChardev *s) +{ + struct winsize ws; + + if (ioctl(QIO_CHANNEL_FILE(s->ioc)->fd, TIOCGWINSZ, &ws) !=3D -1) { + qemu_chr_resize(CHARDEV(s), ws.ws_col, ws.ws_row); + } +} + static void pty_chr_update_read_handler(Chardev *chr) { PtyChardev *s =3D PTY_CHARDEV(chr); @@ -331,6 +345,12 @@ static int qemu_openpty_raw(int *aslave, char *pty_nam= e) return amaster; } =20 +static void term_resize_notify(Notifier *n, void *data) +{ + PtyChardev *s =3D container_of(n, PtyChardev, resize_notifier); + pty_chr_resize(s); +} + static void char_pty_open(Chardev *chr, ChardevBackend *backend, bool *be_opened, @@ -376,6 +396,10 @@ static void char_pty_open(Chardev *chr, s->path =3D g_strdup(path); } } + + pty_chr_resize(s); + s->resize_notifier.notify =3D term_resize_notify; + sigwinch_add_notifier(&s->resize_notifier); } =20 static void char_pty_parse(QemuOpts *opts, ChardevBackend *backend, --=20 2.50.1