dbus-send(1)
NAME
dbus-send - Send a message to a message bus
SYNOPSIS
dbus-send [--system | --session | --address=ADDRESS] [--dest=NAME]
[--print-reply [=literal]] [--reply-timeout=MSEC]
[--type=TYPE] OBJECT_PATH INTERFACE.MEMBER [CONTENTS...]
DESCRIPTION
The dbus-send command is used to send a message to a D-Bus message bus.
See http://www.freedesktop.org/software/dbus/ for more information
about the big picture.
There are two well-known message buses: the systemwide message bus
(installed on many systems as the "messagebus" service) and the
per-user-login-session message bus (started each time a user logs in).
The --system and --session options direct dbus-send to send messages to
the system or session buses respectively. If neither is specified,
dbus-send sends to the session bus.
Nearly all uses of dbus-send must provide the --dest argument which is
the name of a connection on the bus to send the message to. If --dest
is omitted, no destination is set.
The object path and the name of the message to send must always be
specified. Following arguments, if any, are the message contents
(message arguments). These are given as type-specified values and may
include containers (arrays, dicts, and variants) as described below.
<contents> ::= <item> | <container> [ <item> | <container>...]
<item> ::= <type>:<value>
<container> ::= <array> | <dict> | <variant>
<array> ::= array:<type>:<value>[,<value>...]
<dict> ::= dict:<type>:<type>:<key>,<value>[,<key>,<value>...]
<variant> ::= variant:<type>:<value>
<type> ::= string | int16 | uint 16 | int32 | uint32 | int64 | uint64 | double | byte | boolean | objpath
D-Bus supports more types than these, but dbus-send currently does not.
Also, dbus-send does not permit empty containers or nested containers
(e.g. arrays of variants).
Here is an example invocation:
dbus-send --dest=org.freedesktop.ExampleName \
/org/freedesktop/sample/object/name \
org.freedesktop.ExampleInterface.ExampleMethod \
int32:47 string:'hello world' double:65.32 \
array:string:"1st item","next item","last item" \
dict:string:int32:"one",1,"two",2,"three",3 \
variant:int32:-8 \
objpath:/org/freedesktop/sample/object/name
Note that the interface is separated from a method or signal name by a
dot, though in the actual protocol the interface and the interface
member are separate fields.
OPTIONS
The following options are supported:
--dest=NAME
Specify the name of the connection to receive the message.
--print-reply
Block for a reply to the message sent, and print any reply received
in a human-readable form. It also means the message type (--type=)
is method_call.
--print-reply=literal
Block for a reply to the message sent, and print the body of the
reply. If the reply is an object path or a string, it is printed
literally, with no punctuation, escape characters etc.
--reply-timeout=MSEC
Wait for a reply for up to MSEC milliseconds. The default is
implementation-defined, typically 25 seconds.
--system
Send to the system message bus.
--session
Send to the session message bus. (This is the default.)
--address=ADDRESS
Send to ADDRESS.
--type=TYPE
Specify method_call or signal (defaults to "signal").
AUTHOR
dbus-send was written by Philip Blundell.
BUGS
Please send bug reports to the D-Bus mailing list or bug tracker, see http://www.freedesktop.org/software/dbus/
Opportunity
Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.
Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.
Free Software
Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.
Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.
Free Books
The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.
Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.
Education
Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.
Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.
