[glib: 1/11] gio: add GUnixFDList on win32

[Philip Withnall <pwithnall src gnome org>]

commit 5efb84f24a83ba10f6e1ae0385fa0fbc68103ad1
Author: Marc-André Lureau <marcandre lureau redhat com>
Date:   Thu Apr 7 17:59:00 2022 +0400

    gio: add GUnixFDList on win32
    
    FDs are not specific to Unix. win32 has APIs to map CRT fd to/from HANDLE.
    
    Signed-off-by: Marc-André Lureau <marcandre lureau redhat com>

 gio/gio.h         |  1 +
 gio/gunixfdlist.c | 25 +++++++++++++++++++------
 gio/meson.build   |  2 +-
 3 files changed, 21 insertions(+), 7 deletions(-)
---
diff --git a/gio/gio.h b/gio/gio.h
index e37b6bb49f..6f92f8a660 100644
--- a/gio/gio.h
+++ b/gio/gio.h
@@ -169,6 +169,7 @@
 #include <gio/gtlsserverconnection.h>
 #include <gio/gunixconnection.h>
 #include <gio/gunixcredentialsmessage.h>
+#include <gio/gunixfdlist.h>
 #include <gio/gunixsocketaddress.h>
 #include <gio/gvfs.h>
 #include <gio/gvolume.h>
diff --git a/gio/gunixfdlist.c b/gio/gunixfdlist.c
index e8c4ac55e4..6689a72169 100644
--- a/gio/gunixfdlist.c
+++ b/gio/gunixfdlist.c
@@ -26,9 +26,11 @@
  * the %G_SOCKET_FAMILY_UNIX family by using g_socket_send_message()
  * and received using g_socket_receive_message().
  *
- * Note that `<gio/gunixfdlist.h>` belongs to the UNIX-specific GIO
- * interfaces, thus you have to use the `gio-unix-2.0.pc` pkg-config
- * file when using it.
+ * Before 2.74, `<gio/gunixfdlist.h>` belonged to the UNIX-specific GIO
+ * interfaces, thus you had to use the `gio-unix-2.0.pc` pkg-config file when
+ * using it.
+ *
+ * Since 2.74, the API is available for Windows.
  */
 
 /**
@@ -40,7 +42,6 @@
 
 #include "config.h"
 
-#include <unistd.h>
 #include <fcntl.h>
 #include <string.h>
 #include <errno.h>
@@ -48,6 +49,12 @@
 #include "gunixfdlist.h"
 #include "gnetworking.h"
 #include "gioerror.h"
+#include "glib/glib-private.h"
+#include "glib/gstdio.h"
+
+#ifdef G_OS_WIN32
+#include <io.h>
+#endif
 
 struct _GUnixFDListPrivate
 {
@@ -70,7 +77,7 @@ g_unix_fd_list_finalize (GObject *object)
   gint i;
 
   for (i = 0; i < list->priv->nfd; i++)
-    close (list->priv->fds[i]);
+    g_close (list->priv->fds[i], NULL);
   g_free (list->priv->fds);
 
   G_OBJECT_CLASS (g_unix_fd_list_parent_class)
@@ -90,7 +97,9 @@ dup_close_on_exec_fd (gint     fd,
                       GError **error)
 {
   gint new_fd;
+#ifndef G_OS_WIN32
   gint s;
+#endif
 
 #ifdef F_DUPFD_CLOEXEC
   do
@@ -118,6 +127,9 @@ dup_close_on_exec_fd (gint     fd,
       return -1;
     }
 
+#ifdef G_OS_WIN32
+  new_fd = GLIB_PRIVATE_CALL (g_win32_reopen_noninherited) (new_fd, 0, error);
+#else
   do
     {
       s = fcntl (new_fd, F_GETFD);
@@ -134,10 +146,11 @@ dup_close_on_exec_fd (gint     fd,
       g_set_error (error, G_IO_ERROR,
                    g_io_error_from_errno (saved_errno),
                    "fcntl: %s", g_strerror (saved_errno));
-      close (new_fd);
+      g_close (new_fd, NULL);
 
       return -1;
     }
+#endif
 
   return new_fd;
 }
diff --git a/gio/meson.build b/gio/meson.build
index e980ad9e48..2d20794e46 100644
--- a/gio/meson.build
+++ b/gio/meson.build
@@ -354,7 +354,6 @@ if host_system != 'windows'
   unix_sources = files(
     'gfiledescriptorbased.c',
     'giounix-private.c',
-    'gunixfdlist.c',
     'gunixfdmessage.c',
     'gunixmount.c',
     'gunixmounts.c',
@@ -574,6 +573,7 @@ gio_sources = files(
   'gdtlsserverconnection.c',
   'gunionvolumemonitor.c',
   'gunixconnection.c',
+  'gunixfdlist.c',
   'gunixcredentialsmessage.c',
   'gunixsocketaddress.c',
   'gvfs.c',