nih-dbus-tool(1) General Commands Manual nih-dbus-tool(1)NAME
nih-dbus-tool - D-Bus binding code generator
SYNOPSIS
nih-dbus-tool [OPTIONS]... [-o FILE] [XMLFILE]
nih-dbus-tool [OPTIONS]... -o FILE --system|--session --dest=NAME OBJECT-PATH
DESCRIPTION OVERVIEW
The D-Bus introspection format is an XML document describing the interfaces implemented by a particular object, including the methods and
signals of that interface along with their arguments and the properties of that interface.
A single document describes a single object, represented by the root <node> tag. Interfaces implemented by that object are specified by
<interface> tags within it. Methods, signals and properties defined by the interface are described by <method>, <signal> and <property>
tags within the interface. Arguments to methods and signals are defined by <arg> tags within them. Names and other values are specified
as attributes to the tag.
Additional properties for external tools or software may be given in <annotation> tags. These may appear within interfaces, methods, sig-
nals, properties and arguments. nih-dbus-tool makes use of many of these. Note that argument annotations are an nih-dbus-tool extension
to the format.
nih-dbus-tool's parser is reasonably liberal, to allow for future expansion of the D-Bus introspection format. Any unknown tag, attribute
or annotation, or any tag not in an expected location, will be ignored with a warning. However a missing root node tag, missing
attributes, illegal or invalid format values for defined attributes or non well-formed XML will result in an error.
Character data and comments are not considered part of description, and are not parsed.
OPTIONS AUTHOR
Written by Scott James Remnant <scott@netsplit.com>
BUGS
Report bugs at <https://launchpad.net/libnih/+bugs>
COPYRIGHT
Copyright (C) 2009 Scott James Remnant <scott@netsplit.com>.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
LAR PURPOSE.
libnih-dus 2009-04-11 nih-dbus-tool(1)
Check Out this Related Man Page
dbus-binding-tool(1) User Commands dbus-binding-tool(1)NAME
dbus-binding-tool - C language GLib bindings generation utility.
SYNOPSIS
dbus-binding-tool [--force] [--help] [--ignore-unsupported] [--mode=pretty|glib-client|glib-server] [--output=file] [--prefix=symbol-pre-
fix] [--version] [file...]
DESCRIPTION
dbus-binding-tool is used to expose a GObject via D-Bus. As input, dbus-binding-tool uses a D-Bus Introspection XML file. As output, the
client-side or server-side bindings is generated. This output is a header file which eases the use of a remote D-Bus object. Output is
sent to standard out or to the filename specified with the --output argument.
EXTENDED DESCRIPTION
The following is a sample D-Bus Introspection XML file which describes an object that exposes one method, named ManyArgs:
<?xml version="1.0" encoding="UTF-8" ?>
<node name="/com/example/MyObject">
<interface name="com.example.MyObject">
<method name="ManyArgs">
<arg type="u" name="x" direction="in" />
<arg type="s" name="str" direction="in" />
<arg type="d" name="trouble" direction="in" />
<arg type="d" name="d_ret" direction="out" />
<arg type="s" name="str_ret" direction="out" />
</method>
</interface>
</node>
dbus-binding-tool supports annotations in the XML format to further control how the bindings are generated.
client-side bindings
When building client-side bindings, the --mode=glib-client argument is used. The client-side bindings support the "org.freedesk-
top.DBus.Glib.NoReply" annotation. This is specified within the <method> tag to indicate that the client is not expecting a reply to the
method call, so a reply should not be sent. This is often used to speed up rapid method calls where there are no "out" arguments, and not
knowing if the method succeeded is an acceptable compromise to halve the traffic on the bus. For example:
<method name "FooMethod">
[...]
<annotation name="org.freedesktop.DBus.GLib.NoReply" value="yes"/>
[...]
</method>
server-side bindings
When building server-side bindings, the --mode=glib-server argument is used. Also the --prefix argument must be used when building server-
side bindings so that functions in the generated output are prefexed with the specified value. The server-side bindings support the fol-
lowing annotations:
"org.freedesktop.DBus.GLib.CSymbol"
This annotation is used to specify the C symbol names for the various types (interface, method, etc.), if it differs from the name D-Bus
generates.
<interface name="com.example.MyObject">
<annotation name="org.freedesktop.DBus.GLib.CSymbol" value="my_object"/>
[...]
<method name "ManyArgs">
<annotation name="org.freedesktop.DBus.GLib.CSymbol" value="my_object_many_args"/>
[...]
</method>
</interface>
"org.freedesktop.DBus.GLib.Async"
This annotation marks the method implementation as an asynchronous function, which does not return a response straight away but will send
the response at some later point to complete the call. This is used to implement non-blocking services where method calls can take time.
When a method is asynchronous, the function prototype is different. It is required that the function conform to the following rules:
o The function must return a value of type gboolean; TRUE on success, and FALSE otherwise.
o The first parameter is a pointer to an instance of the object.
o Following the object instance pointer are the method input values.
o The final parameter must be a (DBusGMethodInvocation *). This is used when sending the response message back to the client, by calling
dbus_g_method_return or dbus_g_method_return_error.
For example:
<method name "FooMethod">
[...]
<annotation name="org.freedesktop.DBus.GLib.Async" value="yes"/>
[...]
</method>
"org.freedesktop.DBus.GLib.Const"
This attribute can only be applied to "out" <arg> nodes, and specifies that the parameter is not being copied when returned. For example,
this turns a 's' argument from a (char **) to a (const char **), and results in the argument not being freed by D-Bus after the message is
sent. For example:
<arg type="u" name="x" direction="out">
<annotation name="org.freedesktop.DBus.GLib.Const" value=""/>
</arg>
"org.freedesktop.DBus.GLib.ReturnVal"
This attribute can only be applied to "out" <arg> nodes, and alters the expected function signature. It currently can be set to two values:
"" or "error". The argument marked with this attribute is not returned via a pointer argument, but by the function's return value. If the
attribute's value is the empty string, the (GError *) argument is also omitted so there is no standard way to return an error value. This
is very useful for interfacing with existing code, as it is possible to match existing APIs. If the attribute's value is "error", then the
final argument is a (GError *) as usual. For example:
<arg type="u" name="x" direction="out">
<annotation name="org.freedesktop.DBus.GLib.ReturnVal" value=""/>
</arg>
OPTIONS
The following options are supported:
--force
Overwrite the output file if it already exists with a newer timestamp than the source files.
--help
Display usage information.
--ignore-unsupported
If set, then unsupported signatures for <method> parameters are ignored.
--mode=pretty|glib-client|glib-server
If the value is "glib-client", then client bindings are generated. If the value is "glib-server", then server bindings are generated.
If the value is "pretty", then the output is in a more human readable format.
--output=file
Specify the output file.
--prefix=symbol-prefix
Functions in the generated output are prefixed with the symbol-prefix value.
--version
Display the version number of the dbus-binding-tool command.
OPERANDS
The following operands are supported:
file A list of one or more input D-Bus Introspection XML files to include in the generated output.
FILES
The following files are used by this application:
/usr/bin/dbus-binding-tool Executable for the D-Bus Binding Tool application.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWdbus-bindings |
+-----------------------------+-----------------------------+
|Interface stability |Volatile |
+-----------------------------+-----------------------------+
SEE ALSO dbus-cleanup-sockets(1), dbus-daemon(1), dbus-monitor(1), dbus-send(1), dbus-uuidgen(1), libdbus-glib-1(3), attributes(5)NOTES
Written by Brian Cameron, Sun Microsystems Inc., 2009.
SunOS 5.11 26 Feb 2009 dbus-binding-tool(1)