[glib] Add g_socket_shutdown

[Alexander Larsson <alexl src gnome org>]

commit 0ffe7221934623f60e07d3b733d170ce94d26dd5
Author: Alexander Larsson <alexl redhat com>
Date:   Tue May 19 11:52:33 2009 +0200

    Add g_socket_shutdown
---
 docs/reference/gio/gio-sections.txt |    1 +
 gio/gio.symbols                     |    1 +
 gio/gsocket.c                       |   73 +++++++++++++++++++++++++++++++++++
 gio/gsocket.h                       |    4 ++
 4 files changed, 79 insertions(+), 0 deletions(-)

diff --git a/docs/reference/gio/gio-sections.txt b/docs/reference/gio/gio-sections.txt
index f595a2f..581eda6 100644
--- a/docs/reference/gio/gio-sections.txt
+++ b/docs/reference/gio/gio-sections.txt
@@ -1649,6 +1649,7 @@ g_socket_send_to
 g_socket_send_message
 g_socket_close
 g_socket_is_closed
+g_socket_shutdown
 g_socket_is_connected
 g_socket_create_source
 g_socket_condition_check
diff --git a/gio/gio.symbols b/gio/gio.symbols
index 454440b..6cf2493 100644
--- a/gio/gio.symbols
+++ b/gio/gio.symbols
@@ -1067,6 +1067,7 @@ g_socket_accept
 g_socket_bind
 g_socket_check_connect_result
 g_socket_close
+g_socket_shutdown
 g_socket_condition_check
 g_socket_condition_wait
 g_socket_connect
diff --git a/gio/gsocket.c b/gio/gsocket.c
index d7e6ea2..1201be7 100644
--- a/gio/gsocket.c
+++ b/gio/gsocket.c
@@ -1839,6 +1839,79 @@ g_socket_send_to (GSocket      *socket,
 }
 
 /**
+ * g_socket_shutdown:
+ * @socket: a #GSocket
+ * @shutdown_read: whether to shut down the read side
+ * @shutdown_write: whether to shut down the write side
+ * @error: #GError for error reporting, or %NULL to ignore.
+ *
+ * Shut down part of a full-duplex connection.
+ *
+ * If @shutdown_read is %TRUE then the recieving side of the connection
+ * is shut down, and further reading is disallowed.
+ *
+ * If @shutdown_write is %TRUE then the sending side of the connection
+ * is shut down, and further writing is disallowed.
+ *
+ * It is allowed for both @shutdown_read and @shutdown_write to be %TRUE.
+ *
+ * One example where this is used is graceful disconnect for TCP connections
+ * where you close the sending side, then wait for the other side to close
+ * the connection, thus ensuring that the other side saw all sent data.
+ *
+ * Returns: %TRUE on success, %FALSE on error
+ *
+ * Since: 2.22
+ **/
+gboolean
+g_socket_shutdown (GSocket *socket,
+		   gboolean shutdown_read,
+		   gboolean shutdown_write,
+		   GError **error)
+{
+  int res;
+  int how;
+
+  g_return_val_if_fail (G_IS_SOCKET (socket), TRUE);
+
+  if (!check_socket (socket, NULL))
+    return FALSE;
+
+  /* Do nothing? */
+  if (!shutdown_read && !shutdown_write)
+    return TRUE;
+
+#ifndef G_OS_WIN32
+  if (shutdown_read && shutdown_write)
+    how = SHUT_RDWR;
+  else if (shutdown_read)
+    how = SHUT_RD;
+  else
+    how = SHUT_WR;
+#else
+  if (shutdown_read && shutdown_write)
+    how = SD_BOTH;
+  else if (shutdown_read)
+    how = SD_RECEIVE;
+  else
+    how = SD_SEND;
+#endif
+
+  if (shutdown (socket->priv->fd, how) != 0)
+    {
+      int errsv = get_socket_errno ();
+      g_set_error (error, G_IO_ERROR, socket_io_error_from_errno (errsv),
+		   _("Unable to create socket: %s"), socket_strerror (errsv));
+      return FALSE;
+    }
+
+  if (shutdown_read && shutdown_write)
+    socket->priv->connected = FALSE;
+
+  return TRUE;
+}
+
+/**
  * g_socket_close:
  * @socket: a #GSocket
  * @error: #GError for error reporting, or %NULL to ignore.
diff --git a/gio/gsocket.h b/gio/gsocket.h
index 207f168..7d5d0d4 100644
--- a/gio/gsocket.h
+++ b/gio/gsocket.h
@@ -154,6 +154,10 @@ gssize                 g_socket_send_message            (GSocket
 							 GError                 **error);
 gboolean               g_socket_close                   (GSocket                 *socket,
 							 GError                 **error);
+gboolean               g_socket_shutdown                (GSocket                 *socket,
+							 gboolean                 shutdown_read,
+							 gboolean                 shutdown_write,
+							 GError                 **error);
 gboolean               g_socket_is_closed               (GSocket                 *socket);
 GSource *              g_socket_create_source           (GSocket                 *socket,
 							 GIOCondition             condition,