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mosquitto_rr.1.xml
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<?xml version='1.0' encoding='UTF-8'?>
<?xml-stylesheet type="text/xsl" href="manpage.xsl"?>
<refentry xml:id="mosquitto_rr" xmlns:xlink="http:https://www.w3.org/1999/xlink">
<refmeta>
<refentrytitle>mosquitto_rr</refentrytitle>
<manvolnum>1</manvolnum>
<refmiscinfo class="source">Mosquitto Project</refmiscinfo>
<refmiscinfo class="manual">Commands</refmiscinfo>
</refmeta>
<refnamediv>
<refname>mosquitto_rr</refname>
<refpurpose>an MQTT version 5/3.1.1 client for request/response messaging</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>mosquitto_rr</command>
<group choice='req'>
<arg choice='plain'>
<arg><option>-h</option> <replaceable>hostname</replaceable></arg>
<arg><option>-p</option> <replaceable>port-number</replaceable></arg>
<arg><option>-u</option> <replaceable>username</replaceable></arg>
<arg><option>-P</option> <replaceable>password</replaceable></arg>
<arg choice='plain' rep='repeat'><option>-t</option> <replaceable>message-topic</replaceable></arg>
</arg>
<arg choice='plain'>
<arg choice='plain'><option>-L</option> <replaceable>URL</replaceable></arg>
<arg choice='opt' rep='repeat'><option>-t</option> <replaceable>message-topic</replaceable></arg>
</arg>
<arg><option>-e</option> <replaceable>response-topic</replaceable></arg>
</group>
<group choice='req'>
<arg choice='plain'><option>-f</option> <replaceable>file</replaceable></arg>
<arg choice='plain'><option>-m</option> <replaceable>message</replaceable></arg>
<arg choice='plain'><option>-n</option></arg>
<arg choice='plain'><option>-s</option></arg>
</group>
<arg><option>-A</option> <replaceable>bind-address</replaceable></arg>
<arg><option>-c</option></arg>
<arg><option>-d</option></arg>
<arg><option>-D</option> <replaceable>command</replaceable> <replaceable>identifier</replaceable> <replaceable>value</replaceable></arg>
<arg><option>-i</option> <replaceable>client-id</replaceable></arg>
<arg><option>-I</option> <replaceable>client-id-prefix</replaceable></arg>
<arg><option>-k</option> <replaceable>keepalive-time</replaceable></arg>
<arg><option>-N</option></arg>
<arg><option>-q</option> <replaceable>message-QoS</replaceable></arg>
<arg><option>-R</option></arg>
<arg><option>-S</option></arg>
<arg><option>-v</option></arg>
<arg><option>-V</option> <replaceable>protocol-version</replaceable></arg>
<arg><option>-W</option> <replaceable>message-processing-timeout</replaceable></arg>
<arg><option>--proxy</option> <replaceable>socks-url</replaceable></arg>
<arg><option>--quiet</option></arg>
<arg>
<option>--will-topic</option> <replaceable>topic</replaceable>
<arg><option>--will-payload</option> <replaceable>payload</replaceable></arg>
<arg><option>--will-qos</option> <replaceable>qos</replaceable></arg>
<arg><option>--will-retain</option></arg>
</arg>
<group>
<arg>
<group choice='req'>
<arg choice='plain'><option>--cafile</option> <replaceable>file</replaceable></arg>
<arg choice='plain'><option>--capath</option> <replaceable>dir</replaceable></arg>
</group>
<arg><option>--cert</option> <replaceable>file</replaceable></arg>
<arg><option>--key</option> <replaceable>file</replaceable></arg>
<arg><option>--ciphers</option> <replaceable>ciphers</replaceable></arg>
<arg><option>--tls-version</option> <replaceable>version</replaceable></arg>
<arg><option>--tls-alpn</option> <replaceable>protocol</replaceable></arg>
<arg><option>--tls-engine</option> <replaceable>engine</replaceable></arg>
<arg><option>--keyform</option>
<group choice='req'>
<arg choice='plain'><replaceable>pem</replaceable></arg>
<arg choice='plain'><replaceable>engine</replaceable></arg>
</group></arg>
<arg><option>--tls-engine-kpass-sha1</option> <replaceable>kpass-sha1</replaceable></arg>
<arg><option>--insecure</option></arg>
</arg>
<arg>
<arg choice='plain'><option>--psk</option> <replaceable>hex-key</replaceable></arg>
<arg choice='plain'><option>--psk-identity</option> <replaceable>identity</replaceable></arg>
<arg><option>--ciphers</option> <replaceable>ciphers</replaceable></arg>
<arg><option>--tls-version</option> <replaceable>version</replaceable></arg>
</arg>
</group>
</cmdsynopsis>
<cmdsynopsis>
<command>mosquitto_rr</command>
<group choice='plain'>
<arg><option>--help</option></arg>
</group>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><command>mosquitto_rr</command> is an MQTT version 5/3.1.1
client that can be used to publish a request message and wait for a
response. When using MQTT v5, which is the default,
<command>mosquitto_rr</command> will use the Request-Response
feature.</para>
</refsect1>
<refsect1>
<title>Encrypted Connections</title>
<para><command>mosquitto_rr</command> supports TLS encrypted
connections. It is strongly recommended that you use an encrypted
connection for anything more than the most basic setup.</para>
<para>To enable TLS connections when using x509 certificates, one of
either <option>--cafile</option> or <option>--capath</option> must
be provided as an option.</para>
<para>To enable TLS connections when using TLS-PSK, you must use the
<option>--psk</option> and the <option>--psk-identity</option>
options.</para>
</refsect1>
<refsect1>
<title>Options</title>
<para>The options below may be given on the command line, but may also
be placed in a config file located at
<option>$XDG_CONFIG_HOME/mosquitto_rr</option> or
<option>$HOME/.config/mosquitto_rr</option> with one pair of
<option>-option <replaceable>value</replaceable></option>
per line. The values in the config file will be used as defaults
and can be overridden by using the command line. The exceptions to
this is <option>-t</option>, which if given in the config file will
not be overridden. Note also that currently some options cannot be
negated, e.g. <option>-S</option>. Config file lines that have a
<option>#</option> as the first character are treated as comments
and not processed any further.</para>
<variablelist>
<varlistentry>
<term><option>-A</option></term>
<listitem>
<para>Bind the outgoing connection to a local ip
address/hostname. Use this argument if you need to
restrict network communication to a particular
interface.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-c</option></term>
<term><option>--disable-clean-session</option></term>
<listitem>
<para>Disable the 'clean session' flag. This means that all
of the subscriptions for the client will be maintained
after it disconnects, along with subsequent QoS 1 and QoS 2
messages that arrive. When the client reconnects, it will
receive all of the queued messages.</para>
<para>If using this option, the client id must be set
manually with <option>--id</option></para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--cafile</option></term>
<listitem>
<para>Define the path to a file containing PEM encoded CA
certificates that are trusted. Used to enable SSL
communication.</para>
<para>See also <option>--capath</option></para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--capath</option></term>
<listitem>
<para>Define the path to a directory containing PEM encoded CA
certificates that are trusted. Used to enable SSL
communication.</para>
<para>For <option>--capath</option> to work correctly, the
certificate files must have ".crt" as the file ending
and you must run "openssl rehash <path to capath>" each
time you add/remove a certificate.</para>
<para>See also <option>--cafile</option></para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--cert</option></term>
<listitem>
<para>Define the path to a file containing a PEM encoded
certificate for this client, if required by the
server.</para>
<para>See also <option>--key</option>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--ciphers</option></term>
<listitem>
<para>An openssl compatible list of TLS ciphers to support
in the client. See
<citerefentry><refentrytitle>ciphers</refentrytitle><manvolnum>1</manvolnum></citerefentry>
for more information.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-d</option></term>
<term><option>--debug</option></term>
<listitem>
<para>Enable debug messages.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-D</option></term>
<term><option>--property</option></term>
<listitem>
<para>Use an MQTT v5 property with this publish. If you use
this option, the client will be set to be an MQTT v5
client. This option has two forms:</para>
<para><option>-D command identifier value</option></para>
<para><option>-D command identifier name value</option></para>
<para><option>command</option> is the MQTT command/packet
identifier and can be one of CONNECT, PUBACK, PUBREC,
PUBCOMP, SUBSCRIBE, UNSUBSCRIBE, DISCONNECT, AUTH, or
WILL. The properties available for each command are
listed in the Properties section.</para>
<para><option>identifier</option> is the name of the
property to add. This is as described in the
specification, but with '-' as a word separator. For
example:
<option>payload-format-indicator</option>. More details
are in the <link linkend='properties'>Properties</link>
section.</para>
<para><option>value</option> is the value of the property
to add, with a data type that is property
specific.</para>
<para><option>name</option> is only used for the
<option>user-property</option> property as the first of
the two strings in the string pair. In that case,
<option>value</option> is the second of the strings in
the pair.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-f</option></term>
<term><option>--file</option></term>
<listitem>
<para>Send the contents of a file as the request message.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-F</option></term>
<listitem>
<para>Specify output printing format. This option allows
you to choose what information from each message is
printed to the screen. See the <link
linkend='outputformat'>Output Format</link> section
below for full details.</para>
<para>This option overrides the <option>-v</option> option,
but does not override the <option>-N</option>
option.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--help</option></term>
<listitem>
<para>Display usage information.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-h</option></term>
<term><option>--host</option></term>
<listitem>
<para>Specify the host to connect to. Defaults to localhost.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-i</option></term>
<term><option>--id</option></term>
<listitem>
<para>The id to use for this client. If not given, defaults
to mosquitto_rr_ appended with the process id of the
client. Cannot be used at the same time as the
<option>--id-prefix</option> argument.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-I</option></term>
<term><option>--id-prefix</option></term>
<listitem>
<para>Provide a prefix that the client id will be built
from by appending the process id of the client. This is
useful where the broker is using the clientid_prefixes
option. Cannot be used at the same time as the
<option>--id</option> argument.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--insecure</option></term>
<listitem>
<para>When using certificate based encryption, this option
disables verification of the server hostname in the
server certificate. This can be useful when testing
initial server configurations but makes it possible for
a malicious third party to impersonate your server
through DNS spoofing, for example. Use this option in
testing <emphasis>only</emphasis>. If you need to
resort to using this option in a production
environment, your setup is at fault and there is no
point using encryption.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-k</option></term>
<term><option>--keepalive</option></term>
<listitem>
<para>The number of seconds between sending PING commands
to the broker for the purposes of informing it we are still
connected and functioning. Defaults to 60 seconds.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--key</option></term>
<listitem>
<para>Define the path to a file containing a PEM encoded
private key for this client, if required by the
server.</para>
<para>See also <option>--cert</option>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--keyform</option></term>
<listitem>
<para>Specifies the type of private key in use when making
TLS connections.. This can be "pem" or "engine". This
parameter is useful when a TPM module is being used and
the private key has been created with it. Defaults to
"pem", which means normal private key files are
used.</para>
<para>See also <option>--tls-engine</option>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-L</option></term>
<term><option>--url</option></term>
<listitem>
<para>Specify specify user, password, hostname, port and
topic at once as a URL. The URL must be in the form:
mqtt(s):https://[username[:password]@]host[:port]/topic</para>
<para>If the scheme is mqtt:https:// then the port defaults to
1883. If the scheme is mqtts:https:// then the port defaults
to 8883.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-m</option></term>
<term><option>--message</option></term>
<listitem>
<para>Send a single request message from the command line.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-N</option></term>
<listitem>
<para>Do not append an end of line character to the payload
when printing. This allows streaming of payload data
from multiple messages directly to another application
unmodified. Only really makes sense when not using
<option>-v</option>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-n</option></term>
<term><option>--null-message</option></term>
<listitem>
<para>Send a null (zero length) request message.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-p</option></term>
<term><option>--port</option></term>
<listitem>
<para>Connect to the port specified. If not given, the
default of 1883 for plain MQTT or 8883 for MQTT over
TLS will be used.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-P</option></term>
<term><option>--pw</option></term>
<listitem>
<para>Provide a password to be used for authenticating with
the broker. Using this argument without also specifying
a username is invalid when using MQTT v3.1 or v3.1.1.
See also the <option>--username</option> option.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--proxy</option></term>
<listitem>
<para>Specify a SOCKS5 proxy to connect through. "None" and
"username" authentication types are supported. The
<option>socks-url</option> must be of the form
<option>socks5h:https://[username[:password]@]host[:port]</option>.
The protocol prefix <option>socks5h</option> means that
hostnames are resolved by the proxy. The symbols %25,
%3A and %40 are URL decoded into %, : and @
respectively, if present in the username or
password.</para>
<para>If username is not given, then no authentication is
attempted. If the port is not given, then the default
of 1080 is used.</para>
<para>More SOCKS versions may be available in the future,
depending on demand, and will use different protocol
prefixes as described in <citerefentry>
<refentrytitle>curl</refentrytitle>
<manvolnum>1</manvolnum> </citerefentry>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--psk</option></term>
<listitem>
<para>Provide the hexadecimal (no leading 0x)
pre-shared-key matching the one used on the broker to
use TLS-PSK encryption support.
<option>--psk-identity</option> must also be provided
to enable TLS-PSK.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--psk-identity</option></term>
<listitem>
<para>The client identity to use with TLS-PSK support. This
may be used instead of a username if the broker is
configured to do so.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-q</option></term>
<term><option>--qos</option></term>
<listitem>
<para>Specify the quality of service desired for the
incoming messages, from 0, 1 and 2. Defaults to 0. See
<citerefentry><refentrytitle>mqtt</refentrytitle><manvolnum>7</manvolnum></citerefentry>
for more information on QoS.</para>
<para>The QoS is identical for all topics subscribed to in
a single instance of mosquitto_rr.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--quiet</option></term>
<listitem>
<para>If this argument is given, no runtime errors will be
printed. This excludes any error messages given in case of
invalid user input (e.g. using <option>--port</option> without a
port).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-R</option></term>
<listitem>
<para>If this argument is given, messages that are received
that have the retain bit set will not be printed.
Messages with retain set are "stale", in that it is not
known when they were originally published. When
subscribing to a wildcard topic there may be a large
number of retained messages. This argument suppresses
their display.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-S</option></term>
<listitem>
<para>Use SRV lookups to determine which host to connect
to. Performs lookups to
<option>_mqtt._tcp.<host></option> when used in
conjunction with <option>-h</option>, otherwise uses
<option>_mqtt._tcp.<local dns
domain></option>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-s</option></term>
<term><option>--stdin-file</option></term>
<listitem>
<para>Send a request message read from stdin, sending the entire content as a single message.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-t</option></term>
<term><option>--topic</option></term>
<listitem>
<para>The MQTT topic to subscribe to, where responses will
be waited for. See
<citerefentry><refentrytitle>mqtt</refentrytitle><manvolnum>7</manvolnum></citerefentry>
for more information on MQTT topics.</para>
<para>This option may be repeated to subscribe to multiple topics.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--tls-alpn</option></term>
<listitem>
<para>Provide a protocol to use when connecting to a broker
that has multiple protocols available on a single port,
e.g. MQTT and WebSockets.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--tls-engine</option></term>
<listitem>
<para>A valid openssl engine id. These can be listed with
openssl engine command.</para>
<para>See also <option>--keyform</option>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--tls-engine-kpass-sha1</option></term>
<listitem>
<para>SHA1 of the private key password when using an TLS
engine. Some TLS engines such as the TPM engine may
require the use of a password in order to be accessed.
This option allows a hex encoded SHA1 hash of the
password to the engine directly, instead of the user
being prompted for the password.</para>
<para>See also <option>--tls-engine</option>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--tls-version</option></term>
<listitem>
<para>Choose which TLS protocol version to use when
communicating with the broker. Valid options are
<option>tlsv1.3</option>, <option>tlsv1.2</option> and
<option>tlsv1.1</option>. The default value is
<option>tlsv1.2</option>. Must match the protocol
version used by the broker.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-u</option></term>
<term><option>--username</option></term>
<listitem>
<para>Provide a username to be used for authenticating with
the broker. See also the <option>--pw</option>
argument.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-v</option></term>
<term><option>--verbose</option></term>
<listitem>
<para>Print received messages verbosely. With this
argument, messages will be printed as "topic payload". When
this argument is not given, the messages are printed as
"payload".</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-V</option></term>
<term><option>--protocol-version</option></term>
<listitem>
<para>Specify which version of the MQTT protocol should be
used when connecting to the rmeote broker. Can be
<option>5</option>, <option>311</option>,
<option>31</option>, or the more verbose
<option>mqttv5</option>, <option>mqttv311</option>, or
<option>mqttv31</option>.
Defaults to <option>311</option>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--will-payload</option></term>
<listitem>
<para>Specify a message that will be stored by the broker
and sent out if this client disconnects unexpectedly. This
must be used in conjunction with <option>--will-topic</option>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--will-qos</option></term>
<listitem>
<para>The QoS to use for the Will. Defaults to 0. This must
be used in conjunction with <option>--will-topic</option>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--will-retain</option></term>
<listitem>
<para>If given, if the client disconnects unexpectedly the
message sent out will be treated as a retained message.
This must be used in conjunction with <option>--will-topic</option>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--will-topic</option></term>
<listitem>
<para>The topic on which to send a Will, in the event that
the client disconnects unexpectedly.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 id='outputformat'>
<title>Output format</title>
<para>There are three ways of formatting the output from mosquitto_rr.
In all cases a new-line character is appended for each message
received unless the <option>-N</option> argument is passed to
mosquitto_rr.</para>
<para>Payload-only is the default output format and will
print the payload exactly as it is received.</para>
<para>Verbose mode is activated with <option>-v</option> and prints the
message topic and the payload, separated by a space.</para>
<para>The final option is formatted output, which allows the user to
define a custom output format. The behaviour is controlled with
the <option>-F format-string</option> option. The format string is
a free text string where interpreted sequences are replaced by
different parameters. The available interpreted sequences are
described below.</para>
<para>Three characters are used to start an interpreted sequence:
<option>%</option>, <option>@</option> and <option>\</option>.
Sequences starting with <option>%</option> are either parameters
related to the MQTT message being printed, or are helper sequences
to avoid the need to type long date format strings for example.
Sequences starting with <option>@</option> are passed to the
<citerefentry><refentrytitle>strftime</refentrytitle><manvolnum>3</manvolnum></citerefentry>
function (with the @ replaced with a % - note that only the
character immediately after the @ is passed to strftime). This
allows the construction of a wide variety of time based outputs.
The output options for strftime vary from platform to platform, so
please check what is available for your platform. mosquitto_rr
does provide one extension to strftime which is
<option>@N</option>, which can be used to obtain the number of
nanoseconds passed in the current second. The resolution of this
option varies depending on the platform. The final sequence
character is <option>\</option>, which is used to input some
characters that would otherwise be difficult to enter.</para>
<refsect2>
<title>MQTT related parameters</title>
<itemizedlist mark="circle">
<listitem><para><option>%%</option> a literal %.</para></listitem>
<listitem><para><option>%l</option> the length of the payload in bytes.</para></listitem>
<listitem><para><option>%m</option> the message id (only relevant for messages with QoS>0).</para></listitem>
<listitem><para><option>%p</option> the payload raw bytes (may produce non-printable characters depending on the payload).</para></listitem>
<listitem><para><option>%q</option> the message QoS.</para></listitem>
<listitem><para><option>%r</option> the retained flag for the message.</para></listitem>
<listitem><para><option>%t</option> the message topic.</para></listitem>
<listitem><para><option>%x</option> the payload with each byte as a hexadecimal number (lower case).</para></listitem>
<listitem><para><option>%X</option> the payload with each byte as a hexadecimal number (upper case).</para></listitem>
</itemizedlist>
</refsect2>
<refsect2>
<title>Helpers</title>
<itemizedlist mark="circle">
<listitem><para><option>%I</option> ISO-8601 format date and time, e.g. 2016-08-10T09:47:38+0100</para></listitem>
<listitem><para><option>%j</option> JSON output of message
parameters and timestamp, with a quoted and escaped
payload. For example
<code>{"tst":1470825369,"topic":"greeting","qos":0,"retain":0,"payload":"hello
world"}</code></para></listitem>
<listitem><para><option>%J</option> JSON output of message
parameters and timestamp, with a non-quoted and
non-escaped payload - this means the payload must
itself be valid JSON. For example:
<code>{"tst":1470825369,"topic":"foo","qos":0,"retain":0,"payload":{"temperature":27.0,"humidity":57}}</code>.</para></listitem>
<listitem><para><option>%I</option> ISO-8601 format date and time, e.g. 2016-08-10T09:47:38+0100</para></listitem>
<listitem><para><option>%U</option> Unix timestamp with nanoseconds, e.g. 1470818943.786368637</para></listitem>
</itemizedlist>
</refsect2>
<refsect2>
<title>Time related parameters</title>
<itemizedlist mark="circle">
<listitem><para><option>@@</option> a literal @.</para></listitem>
<listitem><para><option>@X</option> pass the character represented
by <option>X</option> to the strftime function as
<option>%X</option>. The options supported are platform
dependent.</para></listitem>
<listitem><para><option>@N</option> the number of nanoseconds that
have passed in the current second, with varying timing
resolution depending on platform.</para></listitem>
</itemizedlist>
</refsect2>
<refsect2>
<title>Escape characters</title>
<itemizedlist mark="circle">
<listitem><para><option>\\</option> a literal \.</para></listitem>
<listitem><para><option>\0</option> a null character. Can be used
to separate different parameters that may contain spaces
(e.g. topic, payload) so that processing with tools such as
<citerefentry><refentrytitle>xargs</refentrytitle><manvolnum>1</manvolnum></citerefentry>
is easier.</para></listitem>
<listitem><para><option>\a</option> alert/bell.</para></listitem>
<listitem><para><option>\e</option> the escape sequence, which can
be used with ANSI colour codes to provide coloured output
for example.</para></listitem>
<listitem><para><option>\n</option> end of line.</para></listitem>
<listitem><para><option>\r</option> carriage return.</para></listitem>
<listitem><para><option>\t</option> horizontal tab.</para></listitem>
<listitem><para><option>\v</option> vertical tab.</para></listitem>
</itemizedlist>
</refsect2>
</refsect1>
<refsect1>
<title>Wills</title>
<para>mosquitto_rr can register a message with the broker that will be
sent out if it disconnects unexpectedly. See
<citerefentry><refentrytitle>mqtt</refentrytitle><manvolnum>7</manvolnum></citerefentry>
for more information.</para>
<para>The minimum requirement for this is to use <option>--will-topic</option> to
specify which topic the will should be sent out on. This will result in
a non-retained, zero length message with QoS 0.</para>
<para>Use the <option>--will-retain</option>, <option>--will-payload</option> and <option>--will-qos</option> arguments to
modify the other will parameters.</para>
</refsect1>
<refsect1 id='properties'>
<title>Properties</title>
<para>The <option>-D</option> / <option>--property</option> option
allows adding properties to different stages of the mosquitto_rr
run. The properties supported for each command are as
follows:</para>
<refsect2>
<title>Connect</title>
<itemizedlist>
<listitem><para><option>authentication-data</option> (binary data - note treated as a string in mosquitto_rr)</para></listitem>
<listitem><para><option>authentication-method</option> (UTF-8 string pair)</para></listitem>
<listitem><para><option>maximum-packet-size</option> (32-bit unsigned integer)</para></listitem>
<listitem><para><option>receive-maximum</option> (16-bit unsigned integer)</para></listitem>
<listitem><para><option>request-problem-information</option> (8-bit unsigned integer)</para></listitem>
<listitem><para><option>request-response-information</option> (8-bit unsigned integer)</para></listitem>
<listitem><para><option>session-expiry-interval</option> (32-bit unsigned integer)</para></listitem>
<listitem><para><option>topic-alias-maximum</option> (16-bit unsigned integer)</para></listitem>
<listitem><para><option>user-property</option> (UTF-8 string pair)</para></listitem>
</itemizedlist>
</refsect2>
<refsect2>
<title>Publish</title>
<itemizedlist>
<listitem><para><option>content-type</option> (UTF-8 string)</para></listitem>
<listitem><para><option>correlation-data</option> (binary data - note treated as a string in mosquitto_rr)</para></listitem>
<listitem><para><option>message-expiry-interval</option> (32-bit unsigned integer)</para></listitem>
<listitem><para><option>payload-format-indicator</option> (8-bit unsigned integer)</para></listitem>
<listitem><para><option>response-topic</option> (UTF-8 string)</para></listitem>
<listitem><para><option>topic-alias</option> (16-bit unsigned integer)</para></listitem>
<listitem><para><option>user-property</option> (UTF-8 string pair)</para></listitem>
</itemizedlist>
</refsect2>
<refsect2>
<title>Subscribe</title>
<itemizedlist>
<listitem><para><option>user-property</option> (UTF-8 string pair)</para></listitem>
</itemizedlist>
</refsect2>
<refsect2>
<title>Unsubscribe</title>
<itemizedlist>
<listitem><para><option>user-property</option> (UTF-8 string pair)</para></listitem>
</itemizedlist>
</refsect2>
<refsect2>
<title>Disconnect</title>
<itemizedlist>
<listitem><para><option>session-expiry-interval</option> (32-bit unsigned integer)</para></listitem>
<listitem><para><option>user-property</option> (UTF-8 string pair)</para></listitem>
</itemizedlist>
</refsect2>
<refsect2>
<title>Will properties</title>
<itemizedlist>
<listitem><para><option>content-type</option> (UTF-8 string)</para></listitem>
<listitem><para><option>correlation-data</option> (binary data - note treated as a string in mosquitto_pub)</para></listitem>
<listitem><para><option>message-expiry-interval</option> (32-bit unsigned integer)</para></listitem>
<listitem><para><option>payload-format-indicator</option> (8-bit unsigned integer)</para></listitem>
<listitem><para><option>response-topic</option> (UTF-8 string)</para></listitem>
<listitem><para><option>user-property</option> (UTF-8 string pair)</para></listitem>
<listitem><para><option>will-delay-interval</option> (32-bit unsigned integer)</para></listitem>
</itemizedlist>
</refsect2>
</refsect1>
<refsect1>
<title>Files</title>
<variablelist>
<varlistentry>
<term><filename>$XDG_CONFIG_HOME/mosquitto_rr</filename></term>
<term><filename>$HOME/.config/mosquitto_rr</filename></term>
<listitem>
<para>Configuration file for default options.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Bugs</title>
<para><command>mosquitto</command> bug information can be found at
<ulink url="https://github.com/eclipse/mosquitto/issues"/></para>
</refsect1>
<refsect1>
<title>See Also</title>
<simplelist type="inline">
<member>
<citerefentry>
<refentrytitle><link xlink:href="mqtt-7.html">mqtt</link></refentrytitle>
<manvolnum>7</manvolnum>
</citerefentry>
</member>
<member>
<citerefentry>
<refentrytitle><link xlink:href="mosquitto_pub-1.html">mosquitto_pub</link></refentrytitle>
<manvolnum>1</manvolnum>
</citerefentry>
</member>
<member>
<citerefentry>
<refentrytitle><link xlink:href="mosquitto_sub-1.html">mosquitto_sub</link></refentrytitle>
<manvolnum>1</manvolnum>
</citerefentry>
</member>
<member>
<citerefentry>
<refentrytitle><link xlink:href="mosquitto-8.html">mosquitto</link></refentrytitle>
<manvolnum>8</manvolnum>
</citerefentry>
</member>
<member>
<citerefentry>
<refentrytitle><link xlink:href="libmosquitto-3.html">libmosquitto</link></refentrytitle>
<manvolnum>3</manvolnum>
</citerefentry>
</member>
<member>
<citerefentry>
<refentrytitle><link xlink:href="mosquitto-tls-7.html">mosquitto-tls</link></refentrytitle>
<manvolnum>7</manvolnum>
</citerefentry>
</member>
</simplelist>
</refsect1>
<refsect1>
<title>Author</title>
<para>Roger Light <email>[email protected]</email></para>
</refsect1>
</refentry>