From: Szymon Lukasz <[email protected]>

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 <[email protected]>
Reviewed-by: Daniel P. Berrangé <[email protected]>
Signed-off-by: Filip Hejsek <[email protected]>
Reviewed-by: Marc-André Lureau <[email protected]>
Message-ID: <[email protected]>
---
 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 881443d869d8..5a90f0221b48 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:

-- 
2.56.0.116.g6de20f6092dc


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