[mutter/cherry-pick-4ed05830] wayland: Close pipe file descriptors after use

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 70deb2d5c9dad3895dbb9a8d035ecf1137fc34ac
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue May 18 17:57:56 2021 +0200

    wayland: Close pipe file descriptors after use
    
    Both ends were being leaked here, one directly, other through the
    GIOChannel.
    
    Fixes: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/4302
    (just maybe)
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1870>
    
    
    (cherry picked from commit 4ed05830e20f4d87a580c8d5073996d97a0975a4)

 src/wayland/meta-wayland-data-device.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/wayland/meta-wayland-data-device.c b/src/wayland/meta-wayland-data-device.c
index dd9c162e77..2f3c154a1d 100644
--- a/src/wayland/meta-wayland-data-device.c
+++ b/src/wayland/meta-wayland-data-device.c
@@ -425,7 +425,9 @@ meta_wayland_data_source_fake_read (MetaWaylandDataSource *source,
     }
 
   meta_wayland_data_source_send (source, mimetype, p[1]);
+  close (p[1]);
   channel = g_io_channel_unix_new (p[0]);
+  g_io_channel_set_close_on_unref (channel, TRUE);
   g_io_add_watch (channel, G_IO_HUP, on_fake_read_hup, source);
 }