[gtk/matthiasc/for-master] file transfer: Fix build on non-Linux

[Matthias Clasen <matthiasc src gnome org>]

commit 721595edeaf270268b282769f9e91b6c40be4f75
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Dec 16 11:28:21 2019 -0500

    file transfer: Fix build on non-Linux
    
    O_PATH and O_CLOEXEC are not universally available.

 gdk/filetransferportal.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
---
diff --git a/gdk/filetransferportal.c b/gdk/filetransferportal.c
index 97e4134651..ff9c799674 100644
--- a/gdk/filetransferportal.c
+++ b/gdk/filetransferportal.c
@@ -26,6 +26,16 @@
 #include <gio/gio.h>
 #include <gio/gunixfdlist.h>
 
+#ifndef O_PATH
+#define O_PATH 0
+#endif
+
+#ifndef O_CLOEXEC
+#define O_CLOEXEC 0
+#else
+#define HAVE_O_CLOEXEC 1
+#endif
+
 #include "filetransferportalprivate.h"
 
 static GDBusProxy *file_transfer_proxy = NULL;
@@ -158,6 +168,10 @@ add_files (GDBusProxy  *proxy,
           g_object_unref (fd_list);
           return;
          }
+
+#ifndef HAVE_O_CLOEXEC
+      fcntl (fd, F_SETFD, FD_CLOEXEC);
+#endif
       fd_in = g_unix_fd_list_append (fd_list, fd, &error);
       close (fd);