+
+##
+# @ChardevFile:
+#
+# Configuration info for file chardevs.
+#
+# @in: #optional The name of the input file
+# @out: The name of the output file
+#
+# Since: 1.4
+##
+{ 'type': 'ChardevFile', 'data': { '*in' : 'str',
+ 'out' : 'str' } }
+
+##
+# @ChardevHostdev:
+#
+# Configuration info for device chardevs.
+#
+# @device: The name of the special file for the device,
+# i.e. /dev/ttyS0 on Unix or COM1: on Windows
+# @type: What kind of device this is.
+#
+# Since: 1.4
+##
+{ 'type': 'ChardevHostdev', 'data': { 'device' : 'str' } }
+
+##
+# @ChardevSocket:
+#
+# Configuration info for socket chardevs.
+#
+# @addr: socket address to listen on (server=true)
+# or connect to (server=false)
+# @server: #optional create server socket (default: true)
+# @wait: #optional wait for connect (not used for server
+# sockets, default: false)
+# @nodelay: #optional set TCP_NODELAY socket option (default: false)
+# @telnet: #optional enable telnet protocol (default: false)
+#
+# Since: 1.4
+##
+{ 'type': 'ChardevSocket', 'data': { 'addr' : 'SocketAddress',
+ '*server' : 'bool',
+ '*wait' : 'bool',
+ '*nodelay' : 'bool',
+ '*telnet' : 'bool' } }
+
+##
+# @ChardevBackend:
+#
+# Configuration info for the new chardev backend.
+#
+# Since: 1.4
+##
+{ 'type': 'ChardevDummy', 'data': { } }
+
+{ 'union': 'ChardevBackend', 'data': { 'file' : 'ChardevFile',
+ 'serial' : 'ChardevHostdev',
+ 'parallel': 'ChardevHostdev',
+ 'socket' : 'ChardevSocket',
+ 'pty' : 'ChardevDummy',
+ 'null' : 'ChardevDummy' } }
+
+##
+# @ChardevReturn:
+#
+# Return info about the chardev backend just created.
+#
+# @pty: #optional name of the slave pseudoterminal device, present if
+# and only if a chardev of type 'pty' was created
+#
+# Since: 1.4
+##
+{ 'type' : 'ChardevReturn', 'data': { '*pty' : 'str' } }
+
+##
+# @chardev-add:
+#
+# Add a character device backend
+#
+# @id: the chardev's ID, must be unique
+# @backend: backend type and parameters
+#
+# Returns: ChardevReturn.
+#
+# Since: 1.4
+##
+{ 'command': 'chardev-add', 'data': {'id' : 'str',
+ 'backend' : 'ChardevBackend' },
+ 'returns': 'ChardevReturn' }
+
+##
+# @chardev-remove:
+#
+# Remove a character device backend
+#
+# @id: the chardev's ID, must exist and not be in use
+#
+# Returns: Nothing on success
+#
+# Since: 1.4
+##
+{ 'command': 'chardev-remove', 'data': {'id': 'str'} }