Class UnixFDMessage

All Implemented Interfaces:
PointerInterface

public class UnixFDMessage extends SocketControlMessage
This #GSocketControlMessage contains a #GUnixFDList.
It may be sent using g_socket_send_message() and received using
g_socket_receive_message() over UNIX sockets (ie: sockets in the
%G_SOCKET_FAMILY_UNIX family). The file descriptors are copied
between processes by the kernel.

For an easier way to send and receive file descriptors over
stream-oriented UNIX sockets, see g_unix_connection_send_fd() and
g_unix_connection_receive_fd().

Note that `<gio/gunixfdmessage.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.

https://docs.gtk.org/gio/class.UnixFDMessage.html

  • Constructor Details

    • UnixFDMessage

      public UnixFDMessage(PointerContainer pointer)
    • UnixFDMessage

      public UnixFDMessage()
      Creates a new #GUnixFDMessage containing an empty file descriptor
      list.
  • Method Details

    • getClassHandler

      public static ClassHandler getClassHandler()
    • newWithFdListUnixFDMessage

      public static UnixFDMessage newWithFdListUnixFDMessage(@Nonnull UnixFDList fd_list)
      Creates a new #GUnixFDMessage containing @list.
      Parameters:
      fd_list - a #GUnixFDList
      Returns:
      a new #GUnixFDMessage
    • appendFd

      public boolean appendFd(int fd) throws AllocationError
      Adds a file descriptor to @message.

      The file descriptor is duplicated using dup(). You keep your copy
      of the descriptor and the copy contained in @message will be closed
      when @message is finalized.

      A possible cause of failure is exceeding the per-process or
      system-wide file descriptor limit.
      Parameters:
      fd - a valid open file descriptor
      Returns:
      %TRUE in case of success, else %FALSE (and @error is set)
      Throws:
      AllocationError
    • getFdList

      public UnixFDList getFdList()
      Gets the #GUnixFDList contained in @message. This function does not
      return a reference to the caller, but the returned list is valid for
      the lifetime of @message.
      Returns:
      the #GUnixFDList from @message
    • stealFds

      public Int stealFds(@Nullable Int length)
      Returns the array of file descriptors that is contained in this
      object.

      After this call, the descriptors are no longer contained in
      @message. Further calls will return an empty list (unless more
      descriptors have been added).

      The return result of this function must be freed with g_free().
      The caller is also responsible for closing all of the file
      descriptors.

      If @length is non-%NULL then it is set to the number of file
      descriptors in the returned array. The returned array is also
      terminated with -1.

      This function never returns %NULL. In case there are no file
      descriptors contained in @message, an empty array is returned.
      Parameters:
      length - pointer to the length of the returned array, or %NULL
      Returns:
      an array of file descriptors
    • getTypeID

      public static long getTypeID()
    • getParentTypeID

      public static long getParentTypeID()
    • getTypeSize

      public static TypeSystem.TypeSize getTypeSize()
    • getParentTypeSize

      public static TypeSystem.TypeSize getParentTypeSize()
    • getInstanceSize

      public static int getInstanceSize()